US1302395A - Horizontal boring, drilling, milling, and tapping machine. - Google Patents

Description

l0 SHEETS-SHEET l.

Patented Apr. 29,1919.

F. McCARTY. HORIZONTAL BORING, DRILLING, MILLING, AND TAPPING MACHINE. APPLICATION FILED IUNE 1B. 1918.

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WI T/VESSES W. F. McCARTY. HORIZONTAL BORING. mums, MILLING, AND TAPPING MACHINE.

APPLICATION FILED JUNE 18 I918- Patented Apr. 29, 1919.

10 SHEETS-SHEET 2.

WITNESSES Y M w ATTOH/I/EVS w. F. McCARTY. HORIZONTAL BORING. DRILLING, MILLING, AND TAPPING MACHINE.

APPLICATION FILED JUNE 18 I m. Patented Apr. 29, 1919.

I0 SHEETS-SHEET 3 W. F. McCARTY. HORIZONTAL BORING. DRILLING, MILLING, AND TAPPING MACHINE.

APPLICATION FILED JUNE 918. 93

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Viki I I I I i I i 5/2 525 i 359 I i 30 I WITNESSES I Hum/70R mzzmm mm 7 Patented Apr. 29,1919.

W. F. McCARTY. HORIZONTAL BORING. DRILLING, MILLING,

AND TAPPING MACHINE.

APPLICATION FILED .IUNE I8. 1918 Patented. Apr. 29, 1919.

I0 SHEETS-SHEET 5.

v m3 m I I WITNESSES W. F. McCARTY. HORIZONTAL BORING DRILLING, MILLING, AND TAPPING MACHINE.

APPLICATION FILED JUNE 18. I9I 8. L 95" Patented Apr. 29,1919.

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F. lVIcCARTY, HORIZONTAL BORING. DRILLING, MILLING, AND TAPPING MACHINE.

APPLICATION FILED JUNE I8. I918.

Patented Apr. 29, 1919.

LWIQBQSD ATTORNEYS W. F; McCARTY.

HORIZONTAL BORING. DRILLING, MILLING, AND TAPPING MACHINE. APPLICATION FILED JUNE 18. 1918.

1]. 32,895., Patented Apr. 29, 1919.

10 SHEETS-SHEET 8.

g g -i--/0 W. F. McCARTY. HORIZONTAL BORING. DRILLING, MILLING,AND TAPPING MACHINE.

l APPLICATION FILED JUNE 18. 1918. L3U2 35 Patented Apr. 29, 1919,

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W/ T/UESSES w. F. McCARTY. HORIZONTAL BORING. DRILLING, MILLING, AND TAPPING M ACHINE.

Patented Apr. 29,1919.

Err/Mar I0 SHEETS-SHEET I0.

I I E APPLICATION FILED JUNE I8. I9I8.

WITNESSES UNIETE 1.

s'ra'rns Parana @FFICE.

WILLIAM F. MCCARTY, 0F DEFIANCE, OHIO, ASSIGNOR T0 DEFIANCE MACHINE WORKS,

- OF DEFIANCE, OHIO, A CORPORATION OF OHIO.

HORIZONTAL BORING, DRILLING, MILLING, AN D TAPPING MACHINE.

Specification of Letters Patent.

Patented Apr. 29, 1919.

Application filed June 18, 1918. Serial No. 240,665.

To all whom it may concern:

Be it known that 1, WILLIAM F. MGCARTY,

a citizen of the Uni ed States. and a resi dent of Defiance, in the county of Defiance and State of Ohio, have invented a new and Improved Horizontal Boring, Drilling, Milling, and Tapping Machine, of which the following is a full, clear, and exact description.

The invention relates to metal working machines, and its object is to provide a new and improved horizontal boring, drilling, milling and tapping machine more especially designed for heavy service and arranged to permit the operator to readily change the speed of the spindle or arbor according to thenatnre'of the work ,to be done 'at the time and without danger of stripping the teeth of the gear wheels of the speed changing gearing. Another object is to provide an automatic, variable feed mechanism for the spindle to feed the latter automatically and at a desired speed. Another object is to allow the operator to feed the spindle by hand whenever it is desired to do so. Another object is to group the controlling devices together to enable the operator to reach any one of them while standing in front of the machine. Another object is to permit of making the desired adjustmentsv without removing or replacing parts of. the machine.

With these and other objects in view, the invention consists of certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the horizontal metal working machine with the righthand end of the spindle shown in section;

Fig. 2 is an enlarged elevation of the lefthand end of the machine;

Fig. 3 is an enlarged sectional side elevation of the head stock and its spindle;

Fig. 4 is a plan view of the clutch mechanism for rotating the spindle in opposite directions;

Fig. 5 is an enlarged sectional side elevation of a portion of the spindle feeding device, the section being on the line 5-:) of Fig. 6;

Fig. 6 is a cross section of the spindle feeding device on the line 66 of Fig. 7

Fig. 7 is a sectional plan view of the same on the line 77 of Fig. 6;

Fig. 8 is an enlarged sectional plan view of the variable speed driving gear for the spindle, the section being on the line 8-8 of Fig. 9;

Fig. 9 is a longitudinal sectional elevation of the same on the line 99 of Fig. 8;

Fig. 10 is a sectional end elevation of the movable connecting gear for the variable speed driving gear of the spindle;

Fig. 11 is an enlarged longitudinal section of the selective mechanism for the variable speed driving gear, the section being on the line 11-11 of Fig. 8;

Fig. 12 is an enlarged sectional front elevation of the adjusting mechanisms for the head stock, the tail stock and the saddle or work carrier;

Fig. 13 is a plan view of a portion of the variable speeddriving gear with portions of thebody shown in section;

Fig- 14 isa perspective skeleton view of the controlling gearings for the spindle, the head stock, the tail stock and the saddle;

Fig. 15 is anenlarged cross section of the tail-stock;

Fig. 16 is an enlarged sectional plan view of the same on the line 16-16 of Fig. 15;

Fig. 17 is an enlarged sectional plan view of the clutch mechanism for the cross feed of the platen;

Fig. 18 is a face view of the position or index disk for indicating the positions of the spindle, spindle head, saddle and saddle platen;

. selective speed devices.

General construction.

The metal working machine is mounted on a suitably constructed bed 30 provided at the rear with an upright 31 having vertical guideways 32 .on which is mounted to slide up and down a head 33 carrying a spindle or arbor 34. On the top of the bed 30 is arranged a longitudinally extending guideway 40 on which is mounted to slide longitudinally a saddle 41 provided with transverse guideways 42 on which is mounted to slide transversely a platen 43 adapted to support the work. On the guideway 40 to the right of the saddle 41 is mounted to 'slide longitudinally a back rest provided with vertical guideways 51 (see Figs. 15 and 16), on which is mounted to slide up and down a bearing 52 provided with a removable housing 53 in which is mounted to turn a bar 54 having its inner end 55 tapering and engaging a socket 56 formed in the right-hand end of the spindle 34 (see Fig. 1), the said bar 54 forming an extension of the spindle 34 to steady the latter. The bar 54 can be readily removed from the spindle 34 and replaced by a larger or a smaller one according to the work in hand at the time, it being understood that bushings 53 with bores of different diameters are used according to the sizes of the extension bars 54 to be used in the machine. The bar 54 is adapted to carry a boring tool 57, but for drilling, tapping or milling purposes the bar 54 .is removed and a drilhng tool, or tapping tool," or a milling tool is directly attached to the spindle socket 56.

Variable speed changing mechanism.

, The main shaft 60 (see Figs. 1, 2, 8 and 14) 1s ournaled in roller bearings 61 mounted 1n a back gear housing 62 attached to or forming part of the left-hand end of the bed 30. On the outer endof the main shaft 60 is secured a pulley 63 connected by belt with driving means for imparting continuous rotary motion to the main shaft 60, it

- clutch members 72 and 73 adapted to be engaged by a double clutch 74 mounted to turn with and to slide lengthwise on 'the main shaft 60. Thus when the double clutch 74 is in engagement-with the clutch member 72 then a rotary motion is transmitted from the main shaft 60 to the gear wheel 70, and when the double clutch 74 is shifted into engagement with the clutch member 7 3 then a rotary motion is transmitted from the main shaft 60 to the gear wheel 71, and when the double clutch 74 is shifted out of engagement with both clutch members 72 and 3 then it is in neutral or intermediate posltlon and hence does not rotate either the gear wheel or 71. lin order to shift the double clutch 1'4 lengthwise on the main a hand lever fulcrumed at 81 on the front of a housing 82 attached to or forming part of the bed 30. When the lever 80 is in vertical position, the double clutch 74 is in intermediate or neutral position, and when. the lever 80 is swung over to the left then the double clutch 74 is moved into engagement with the clutch member 72, and when the lever 80 is swung from its vertical position to the right then the double clutch 74 engages the clutch 73. The positions of the lever 80 are indicated on an indicating plate 83 attached to the front of the housing 82, as plainly shown in Fig. 1.

The normally loose gear wheels 70 and 71 are in mesh with gear wheels 90 and 91 keyed orotherwise fastened on a shaft 92 journaled in bearings 93 arranged on the 1 housing 62, as plainly indicated in Fig. 8.

The gear wheels 70 and 90 are approximately of the same diameters to rotate the shaft 92 approximately at the same speed as that of the main shaft 60 at the time the double clutch 74 engages the clutch member 72. The gear wheel 91 is larger in diameter than the gear wheel 90, and its mate 71 is smaller than the gear wheel 70. and when the double clutch 74 is in mesh with the clutch member 73 then the shaft 92 is rotated at a. lower speed but with increased power. By the arrangement described the shaft 92 can be rotated at a higher or a lower rate of speed according to which of the gear wheels 90 or 91 is driven at the time from the main shaft 60 by the double clutch 74, as above explained.

On the shaft 92 is secured a series of step gear Wheels 100, 101, 102, 103 and 104, and opposite the same is arranged a second set of step gear wheels 105, 106, 107, 108 and 109 arranged in reverse order from the said gear Wheels 100, 101, 102, 103 and 104, and keyed or otherwise secured on a shaft 110 journaled in suitable roller "bearings 111 arranged on the housing 62. Either pair of gear wheels 100 10.5, 101 106, 102 107, 103 108. and 104 109 is adapted to be engaged by an intermediate connecting gear wheel 112 (see Figs. 9 and 10) journaled in a forked bracket 113 secured to a horizontal diagonally disposed shaft 114 mounted to turn and to slide in bearings 115'arranged on the upper portion of the housing 62. The forward end of the shaft 114 is provided with a hand-operated shifiingand turning lever 116 (see Figs. 1,

2 and 10) within convenient reach of the operator standing in front of the housing 82. The operator having hold of the lever 116 can impart a sliding motion to the shaft 114 with a view to move the connectmg gear wheel 112 intoregistering position with any one of the pairs of gear wheels 100 105, 101 106, 102 107, 103 10s, and 104 109, and on then turning the lever 116 the said gear wheel 112 is moved into mesh with the gear wheels of the corresponding pair of gear wheels. I

In'order to enable the operator to quickly and correctly position the lever 116 use is made of indicating marks 117 arranged on an indicating plate 118 attached to the upper part of the housing 62. When the lever 116 is in horizontal position the connecting gear wheel 112 is in engagement with a corresponding pair of gear wheels 101 106, 102 107, 103 108 and 104 109, and when it is desired to shift the connecting gear wheel 112 into another pair of said gear wheels then the operator swings the lever 116 downward to swing the bracket 113 upward thus disengaging the connecting gear'wheel 112 from the pair of gear wheels with which it was in mesh at the time. The operator next pushes the lever 116 forward or rearward to the desired position indicated .by a corresponding mark 117 and then the operatorreturns the lever 116 to normal horizontal position whereby the connecting gear wheel 112 is engaged with the corresponding gear wheels of the selected pair of gear wheels 100 105, 101 106, 102 107, 103 108, 104 109. As shown in Fig. 9, for instance, the connecting gear wheel 112 is in mesh with the gear wheels 100 105, and when the connecting gear wheel 112 is shifted to the position shown in Fig. 10 then it is in meshwith the gear wheels 104 109. It will be noticed that on the operator properly manipulating the lever 116 as described the intermediate gear wheel 112 is not shifted into mesh with any one of the pailrs of said gear wheels unless the said intermediate connecting gear wheel 112 is first moved out of mesh with the pair of step gear wheels it is in mesh with at the time, so thatfi stripping of the gear teeth of the gear whee sis completely avoided. It will be noticed that the speed changing mechanism provides for ten different speeds according to the position of the double clutch 74 relative to the gear wheels and 71 and that of the intermediate connecting gear wheel 112 relative to the pairs of step gear wheels 100 105, 101 100, 102 107, 10s 108, 104 109.

Spindle driving meoizanism.

In order to rotate the spindle 34 clockwise or in a reverse direction from the variable speed changing mechanism above described, the following arrangement is made:

The right-hand end of the shaft 110 extends to the outside'of the housing 62 '(see Figs. 8 and 9) and on this outer end of the shaft 110 is secured a bevel gear wheel 120 in mesh with a bevel gear wheel 121 slidingly connected by a key 122 with a vertically disposed shaft 123 journaled in bearings 124 and 125, and of which the hearing 124 is arranged on the housing 62 (see Fig. 9) and the bearing 125 is arranged in the head 33 (see Fig. 3). Near the upper end of the shaft 123 is secured a bevel gear wheel 130 in mesh with a bevel gear wheel 131 secured on a drive shaft 132 journaled in bearings 133 and 134. arranged. on the head 33, as plainly indicated in Fig. 3. On the shaft 132 are secured gear wheels 135 and 136, of which the gear wheel 135 is in mesh with an intermediate gear wheel 137 in mesh with a gear wheel 138 mounted to rotate loosely on a sleeve 139 rotating with the spindle 34. The gear Wheel 136 is in mesh with' a gear wheel-140 mounted to rotate loosely on the sleeve 139 and the opposite faces of the gear wheels 138 and 140 are provided with clutch members 141 and 142 (see Fig. 4) either of which is adapted to be engaged by clutch members 143, 144 of a double clutch 145 slidably and rotatably connected by a key 146 with the spindle 34 and its sleeve 139. The double clutch 145 is engaged by a shifting fork 147 secured on the lower end of a vertically disposed shaft 148 journaled in suitable bearings arranged on the head 33. On the upper end of the shaft 148 is secured a/handle 149 projecting forwardly within convenient reach of the operator standing in front of the housing 82. When the machine is running and the shaft 110 is driven, as previously explained, then a rotary motion is transmitted by the bevel gear wheels 120 and 121 to the shaft 123 which by the bevel gear wheels 130 and 131 rotates the countershaft 132. 3 When the double clutch 145 is in its neutral or intermediate position, as shown inFigs. 3 and 4,

then the spindle 34 is at a standstill, but

when the operator swings the handle 149 from the right to the left then the clutch members 144 of the double clutch 145 engage the clutch members 142 whereby the rotary motion of the shaft 132 is transmitted to the spindle 34 by way of the gear wheels 136, 140 and the double clutch 145 with a View to rotate the spindle 34 clockwise. When it is desired to turn the spindle 34 in the reverse or opposite direction then the operator swings the handle 149 from the left to the night to disengage the clutch members 144 from the clutch members 142 andto engage the clutch members 143 with the clutch members 141 whereby the rotary motion of the shaft 132 is transmitted by the gear wheels 135, 137 and 138 to the double clutch 145 which in turn rotates the spindle 34 in the reverse direction. From the foregoing it will be seen that by the arrangement described the operator on manipulating the handle 149 can connect the shaft 132 with the spindle 34 to rotate the latter in one or the other direction. .The sleeve 139 is mounted to turn in bearings 150 and 151 arranged on the head 33, as plainly shown in Fig. 3, and a suitable thrust bearing 152 is interposed between the gear wheel 140 and the bearing 150, and another thrust bearing 153 is arranged between the bearing 151 and collars 154 screwed or otherwise secured on the left hand end of the spindle 139. The upper end of the shaft 123 is provided with a suitable pump 155 for pumping a suitable lubricant into the head 33 with a view to properly lubricate the parts mounted therein.

Spindie feed.

The spindle 34 is moved forward lengthwise of its aXis from the left to the right to engage the spindletool with the work, or from the right to the left to move the tool out of engagement with the work, and for this purpose a variable speed spindle feed mechanism is provided driven from the shaft 110 of the variable speed changing mechanism. The variable speed spindle feed mechanism consists of a direct rapid traverse mechanism to feed the spindle rapidly in either direction, and an indirect slow feed mechanism to feed the spindle at several varying slow speeds in either direction.

Indirect slow feed mechanism.

The gear wheel 108 on the shaft 110 is in mesh with a gear wheel 160 mounted to rotate loosely on a shaft 161 journaled in bearings 162 forming part of or attached to the housing 62. On the shaft 110 is keyed or otherwise secured a gear wheel 163 in mesh with an intermediate gear wheel 164 journaled in the housing 62 and in mesh with a gear wheel 165 mounted to rotate loosely on the said shaft 161. The gear wheels 160 and 165 are provided at their opposite faces with clutch members 166 and 167 adapted to be engaged by clutch members 168 and 169 formed on a double clutch 170 mountedto rotate with and to slide lengthwise on the shaft 161. Normally the double clutch 170 is in neutral position, as shown in Fig. 8, and when the double clutch 170 is moved from the right to the left then the clutch members 168 engage the clutch members 166 whereby a rotary motion of the shaft 110 is transmitted to the shaft 161 by the gear wheels 108, 160, the clutch members 166, 168 and the double clutch 170. When the double clutch 170 is shifted from the left to the right then the clutch members 169 engage the clutch members 167 whereby the shaft 161 is rotated in the reverse direction from plained. The lever the shaft 110 by the gear wheels 163, 164 and 165 and the clutch members 167 and 169 and the double clutch 170. The double clutch 170 is engaged by a shifting fork 171 (see Figs. 1, 2 and 8) secured on the inner end of a rock shaft 172 journaled in the front of the housing 62 and provided at its outer end with a hand lever 173 within convenient reach of the operator standing in front of the housing 82. When the double clutch 170 is in neutral position the lever 173 is in the position shown in Fig. 1, and when the lever 173 is moved upward then the double clutch 170 is moved in engagement with the clutch members 166, and when the said lever 173 is moved from neutral position downward then the double clutch 170 is moved into engagement with the clutch members 167 for the purpose previously eX 173 is held in adjusted position by a. spring-pressed locking pin 174 (see Fig. 8) adapted to engage one of three apertures 175 formed in a boss 176 forming an integral part of the front of the easing 62.

The right-hand end. of the shaft 161 is coupled by a sleeve 180 with-a shaft 181 journaled in the housing 82, (see Fig. 8). 0n the shaft 181 are keyedor otherwise secured a series of step gear wheels 182, 183, 184, and 185, in mesh with step gear wheels 186, 187, 188 and 189, mounted to rotate loosely on a slip shaft 190 mounted to slide and to turn in bearings 191 and 192 arranged in the housing 82 (see Figs. 8 and 11). In the slip shaft 190 is formed a diametrical guideway 191 in which is mounted to slide diametrically a key 192 adapted to engage a keyway 193 formed in each of the step gear wheels 186, 187, 188 and 189 to rotate the shaft 190 at the corresponding speed from the shaft 181 driven from the shaft 161, as above explained. The key 192 is provided with inclines 194 and 195 adapted to engage the inner V-shaped edges 196 of cam washers 197, 198 and 199 interposed between thecorresponding step gears 186 187, 187 188, and 188 189. The left-hand side of the key 192 is provided with a ll-shaped notch 200 engaged by theconical end 201 'of a pin 203 mounted to slide in a recess 204 formed centrally in the left-hand end of the shaft 190. The pin 203 is pressed to the right by a spring 205 held in the recess 204 and abutting with its left-hand end on'a screw 206 screwed in the left-hand end of the shaft The spring-pressed pin 203 serves to hold thekey' 192 in engagement with the keyway 193 of the corresponding step gear wheel 186, 187, 188 or 189 to cause the step gear wheel'to rotate the shaft 192' at a responding speed. When the. slip shaft 190 is moved in the direction of its length then the corresponding bevel or incline 194 or 195 engages the wedge-shaped inner edge mosses 196 of the corresponding cam washer 197, 198 or 199, thus retracting the key 192 from the corresponding keyway 193 to allow of moving the slip shaft 190 to the right or to the left as the case may be. It is understood thatnvhen the key 192 is retracted, the spring pressed pin 203 is pushed outward and as soon as the key 192 is moved into register with the corresponding keyway 193 then the spring-pressed pin-203 forces the key 192 into engagement with such keyway 193. It will be noticed that When the shaft 181 is rotated, as above explained, then its rotary motion is transmitted by the gear wheels 182, 183, 184 or 185 to the gear wheels 186, 187, 188 and 189, either of which transmits its rotary motion by a variable speed to the shaft 190 according to which of the gear wheels 186, 187, 188 or 189 is locked to the slip shaft 190 by the key 192, it being understood that all the gear wheels 186, 187, 188 and 189 are simultaneously driven from the gear wheels 182, 183, 184 and 185 keyed on the shaft 181.

The right-hand end of the shaft 190 is provided with a reduced portion 210 (see Fig. 11) on which is held asleeve 211 by the use of a nut 212 screwing on the right-hand end of the reduced portion 210. The sleeve 211 is provided with a rack 213 in mesh with a pinion 214 secured on a transverse shaft 215 journaled in suitablev bearings arranged on the housing 82. To the forward end of the shaft 215 is secured a handle 216 within convenient reach of the operator standing in front of the housing 82 (see Fig. 1). The handle 216 is provided with a spring-pressed pin 217 adapted to engage one of four recesses or apertures 218 formed on an index plate 219 arranged on the front face of the housing 82. By the arrangement described, the operator in charge of the machine can move the handle 216 quickly into the desired position to engage the key 192 with the key- Way 193 of the corresponding gear wheel I 186, 187 188 or 189. It is understood that when the operator imparts a swinging motion to the handle 216 the slip shaft 190 is shifted sidewise ,according to the direction in which the handle 216 is turned at the time, and when the pin 217 engages a desired recess 218 then the key 192 is in register with the keyway 193 of the corresponding gear wheel 186, 187, 188 or 189. Thus the handle 216 is used by the operator for shifting the slip shaft 190 sidewise and its position indicates which one of the gear wheels 186, 187 188 or 189 is locked to the slip shaft 190 at the time. The arrangement just described provides a manually controlled speed selective device for driving theslip shaft 190 from the'connected shafts 181, 161 at a varying speed.

' ()n the right-hand end of the slip shaft 190 is secured a key 225 slidably engaging a pinion 226 in mesh with a gear wheel 227 slidably connected by a key 228 with a slip shaft 229 mounted to turn and to slide in bearings 230, 231 arranged on the housing 82 (see Fig. 9). On the slip shaft 229 are mounted to rotate loosely step gear wheels 235, 236 and 237, either one of which is adapted to be coupled to the slip shaft 229 by a key 238 similar to the key 192 above mentioned and shown infFig. 11 so that further description of the same is not deemed necessary. The slip shaft 229 is also pro; vided with a sleeve 239 provided with a rack 240 in mesh with a pinion .241 secured on a transverse shaft 242 journaled in the front of the housing 82. The forward end of the shaft 242 is provided with a handle 243 similar to the handle 216 and within convenient reach of the operator standing in front of the housing 82. The handle 243 is provided with a spring-pressed pin 244 adapted to engage one of three recesses 245 formed on an index plate 246- arranged on the front of the housing 82. By the arrangement described, the operator can readily manipulate the handle 243 so as to connect either of the gear wheels 235, 236 or 237 with the slip shaft 229 rotated from the slip shaft 190. By the arrangement described a second manually controlled selective speed device is provided for driving the shaft 253 from the shaft 229 at a varying speed.

Direct rapid traverse mechanism.

The shaft 253 is common to both the indirect slow feed mechanism and the rapid traverse mechanism. On the shaft 253 are mounted to rotate loosely gear wheels 256,

257 in mesh with the gear wheels 160 and 165 previously mentioned andmounted on the shaft 161. The gear wheels 256 and 257 are provided on their opposite faces with clutch members 258 and 259 adapted to be engaged by clutch members 260 and 2610f a double clutch 262 mounted to turn with and to slide on the shaft 255. Normally the double clutch 262 is in intermediate position, but when the clutch 262 is moved from the right to the left then its clutch members 260 engage the clutch members 258 to transmit the rotary motion of the gear wheel 256 derived from the gear wheel 160 to the shaft 255, and when the double clutch 262 is moved from the left to the right then its clutch members 261 engage the clutch members 259 thus rotating the shaft from the gear wheel 257 driven from the gear wheel 165. It is understood that the gear wheels 256 and 257are constantly driven from the gear wheels and as the latter are 125 driven from the driven shaft 110, as previously explained. It is expressly understood that the shaft 161 as well as the shaft 255 can be drii'en in either direction on moving the clutches 'and 262 in engagement 130 with the" corresponding gear wheels. The double clutch 262 is engaged by a shifting fork 263 (see Fig. 2) secured on the inner end of a shaft 264 journaled in a suitable bearing arranged on the front of the housing 62'. On the outer end of the shaft 264 is secured a lever 265 under the control of the operator standing in front of the housing 82, as plainly indicated in Fig. 1. Normally the lever 265 is in the'position shown in Fig. 1, and when the lever is in this position the double clutch 262 is in intermediate J or neutral position, and when the lever 265- is swung upward from its neutral position then the double clutch 262 connects the gear wheel 256 with the shaft 255 to rotate the latter in one direction, and when the lever 265 is swung downward from its neutral position then the double clutch 262 connects the gear wheel 257 with the shaft 255 to rotate the latter in the opposite or reverse direction.

On the shaft 253 (see Figs. 12 and 14) is secured a gear wheel 270 in mesh with a gear wheel 271 secured on the slip shaft 272 mounted to turn and to slide lengthwise in suitable bearings 273 and 274 forming part of the housing 82. The slip shaft 272 is provided with a key 275 adapted to engage a bevel gear wheel 276 mounted to rotate loosely on the slip shaft 272. When the slip shaft 272 is shifted to engage the key 275 with a keyway 277 on the bevel gear wheel 276, then the latter rotates with the shaft 272 driven from the shaft 253 by way of the gear wheels 270, 271. The slip shaft 272 is provided with a sleeve 280 having a rack 281 engaged by a gear wheel 282 secured on a transverse shaft 283 journaled in the front of the housing 82 and carrying at its outer end a handle 284 under the control of the operator standing in front of the housing 82 (see Fig. 1). The handle 284 is provided with a spring-pressed pin 285 engaging at the time one of four recesses or apertures 286, 287, 288 or 289 (see Figs. 1 and 18) formed in-an index plate 290 attached to orforming part of the housing 82. When the pin 285 engages the aperture 286 then the slip shaft 272 is in its extreme left-hand position with the key 275 in engagement with the keyway 277 of the bevel gear wheel 276 to rotate the latter on rotating the slip shaft 272.

The bevel gear wheel 276 is in mesh with a bevel gear wheel 291 (see Fig. 14) secured on the rear end of a transversely extending shaft 292 journaled in suitable bearings arranged in the housing 82. On the forward end of the shaft 292 is secured a bevel gear wheel 293 in mesh with a bevel gear wheel 294 secured on the lower end of a vertically disposed shaft 295 journaled at its lower end in a housing 82, and at its upper end in the head 33. Within the head 33 is arranged a bevel gear wheel 300 mounted to turn with "and to slide up and down on the shaft 295-,

It will be noticed that the rotary motion given to the slip shaft 272 is transmitted by the bevel gear wheels 276, 291 to the shaft 292 which by the bevel gear wheels 293, 294 rotates the shaft 295 which by the bevel gear wheels 300, 301 rotates the spindle feed shaft 302 in either direction according to the direction in which the slip shaft 272 is rotated at the time. On the spindle feed shaft 302 within the hous ing 305 is secured a worm 310 in mesh with a worm wheel 311 (see Figs. 6, 7 and 14) mounted to rotate loosely on a transverse shaft 312 journaled in the housing 305. The worm wheel 311 is provided'with a clutch member 313 adapted to be engaged by a clutch member '314 mounted to turn with and to slide lengthwise on the shaft 312. Normally theclutch member 314 is in engagement with the clutch member 313 so that when the spindle feed shaft 302 is rotated from the shafts 295, 292,as previously explained, then a rotary motion is transmitted v to the shaft 312. On the shaft 312 issecured a pinion 315 in mesh with a feed rack 316 secured on the under side of a sleeve 317 held on the reduced left-hand end 318 ofthe spindle 34. Thus when the shaft 312 is rotated the pinion 315 imparts a longitudinal traveling motion to the rack 316 whereby the sleeve 317 imparts an endwise traveling movement to the spindle 34 to feed the latter either from the right to the left or from the left to the right according to the direction in which the shaft 312 is turned at the time.-

Fast feed mechanism for spindle.

is coiled on. the rod 323 and rests with one-- end on a collar arranged on the inner end of the rod 323, and the said spring 324 bears agalnst the arm 322 of the shifting fork 320 to normally hold the clutch member 314 in engagement with the clutch member 313. The shifting fork 320 is also provided with an upwardly extending pin 32 6 on which is journaled a friction roller 327 engaged by the pointed end 328 of an inclined shaft 329 connected by a key 330 and keys way 331 with the hub 332 of a spiral gear. Wheel 333 in mesh with a similar gear wheel 334 secured on the forward end of the shaft 312. The hub 332 of the gear wheel 333 is journaled in a suitablebearing 335 arranged on the housing 305, as plainlyshown in Figs. 6 and 7.

The outer end of the shaft 329 is mounted to turn in a sleeve 340 mounted to turn in a bracket 341attached to the head 33, as shown in Figs. 1 and 7. The sleeve 340 is engaged by a nut 342 seated on the bracket 341 to hold the sleeve 340 in place. The sleeve 340 is provided with a head 343 on which are pivoted two or more levers 344 projecting outwardly from the head to be grasped by the operator in charge of the machine and standing in front of the housing 82.- The inner ends of the levers 344 terminate in rounded-off ends 345. engaging an annular groove 346 formed in the shaft 329. Normally the parts are held in the position shown in Fig. 7 by the action of the spring 324 forcing the friction roller 327 against the pointed end 328 of the shaft 329. When it is desired to disconnect the clutch member 314 from the clutch member 313 then the operator takes hold of the levers 344 and swings the same'toward each other thus causing the shaft 329 to slide from the right to the left whereby its conical end 328 acts on the friction rollers 327 and thus imparts a rocking motion to the shifting fork 320 whereby the clutch member 314 is moved out of engagement with the clutch member 313.

The operator now turns the levers 344 where by-a turning motion is given to the shaft 329.

which by the gear wheels 333 and 334 turns the shaft 312 which by its pinion 315 in mesh with the rack 316 imparts a quick feeding movement to the spindle 34 either from the right to the left or from the left to the right according to the direction in which the shaft 329 is turned by the operator manipulating the levers 344. It is understood that when the levers 344 are swun toward each other to the full extent then tfile point 328 of the shaft 329 is carried beyond the friction roller 327 and the latter now engages the side of the shaft 329 thus holding the shaft 329 locked in this position. In order to allow the shifting rod 323 to return by the action of the spring 324', the operator must'swing the levers 344 outward to return the shaft 329 until the pointed end 328 again engages the friction roller 327 whereby the shaft 329 and the levers 344 are returned to'normal position owing to the pressure exerted by the friction roller 327 onthe conical point 328.

Slow hand feed mechanism for'spz'ndle. I When'iti is desired togive a slow hand feed to the spindle 34 use is made of the following arrangement: The bevel gear wheel 300, previously mentioned and shown in Fig. 14, is in mesh with a bevel gear wheel 350 secured at the rear end of a transverse shaft 351 journaled in the head 33. On the outer end of the shaft 351 is secured a hand wheel 352 under the control of the operator in front of the housing 82. It is understood that the key 27 5 (see Fig. 12) is out of engagement with the bevel gear wheel 276 at the time it isdesired to feed the spindle 34 by hand either by the quick action on the operator manipulating the levers 344, as above explained, or through the slow action by the operator turning the handle 352, it being understood that by the use of either of said hand feeds the spindle can be moved from the left to the right or from the right to the left, as desired by the operator.

Head and back rest adjusting devices.

In order to adjust the head 33 in an up or down direction with a view to raise or lower the spindle 34, the following arrangement is made: On the slip shaft 272 (see Fig. 12) is mounted to rotate loosely a gear wheel 360 having a key groove 361 adapted to be engaged by the key 275 to connect the gear wheel 360 with the slip shaft 272. In orderto engage the'key 275 with the key groove '361 the handle 284 is turned until its locking pin. 285 engages the aperture 287 (see Figs. 1 and 18).- The gear wheel 360 is in mesh with a gear wheel 362 secured on a longitudinally extendin shaft 363 journaled at its left-hand end in t e housing 82 and journaled at its right-handend inthe back rest 50 (see Figs. 15 and 1,6) On the left-hand end of the shaft 363 is secured a bevel gear wheel'370 in mesh with a bevel gear wheel 371secured on the lower end of a vertically disposed feed screw 372 screwing in a nut 373 secured to or forming part of the head 33. When the key 27 5 is in engagement with the key groove inc 361 and the-slip shaft 272 is rotated then a rotary motion is transmitted by the gear wheel 360 to the gear wheel 362 and the shaft 363 which by the gear wheels 370 and371 rotates the feed screw 372 to move the head 33 upward or downward according to thedirection in which the-slip shaft 272 is turned at the time.

On the upper end of the shaft 377 is secured a gear wheel 379 in mesh with a gear wheel 380 secured on the lower end of a eed screw 381 gear wheel 400 is in mesh with a gear wheel screwing in a nut 382 attached to the bearing 52. Thus when the shaft 363 is turned in one direction the feed screws 372 and 3S1move the head 33 and the bearing 52 simultaneously upward, and when the shaft-363 is turned in the opposite direction then the feed screws 372 and 381 move the head 33 and the bearing 52 simultaneously downward. The lower portion of the feed screw 381 is journaled in suitable step bearings 383 arranged on the tail-stock 50, as plainly shown in Fig. 15. Normally the head 33 and the bearing 52 are locked in the adjusted positions to the standard 31 and the back rest 50 by the usual clamping means 384 and 385 indicated in Fig. 1.

In order to permit of turning the shaft 363 by hand with a view to adjust the head 33 and the bearing 52 up or down at the time the key 275 is out of engagement with the key groove 361 of the gear wheel 360, the following arrangement is made: A bevel gear wheel 390 (see Figs. 12 and 14) is in mesh with the bevel gear wheel 370 secured on the rear end of a transversely extending shaft 391 journaled in suitable bearings on the housing 82. The forward end 392 of this shaft 391 is ade polygonal for receiving a wrench or 0t ier tool to permit the operator to conveniently turn the shaft 391 with a View to rotate the shaft 363, the rotary motion of which is transmitted to the feed screws 372 and 381, as above explained, to move the head 33 and the bearing 52 simultaneously up or down according to the direction in which theshaft 391 is turned by the operator.

Saddle adjusting device.

In order to move the saddle 41 by power sidewise on the guideway 40 the following arrangement is made: On the slip shaft 272 is mounted to rotate loosely a gear wheel 400 provided with a key groove 4 01 adapted to be engaged by the key 27 5 to connect the slip shaft 272 with the gear wheel 400.' When the handle 284 is turned so that its locking pin 285 engages the aperture 288 (see Figs. 1 and 18) then the key 275 engages the key groove 401 and hence the gear Wheel 400 rotates with the shaft'272. The

402 secured on a feed screw 403 journaled at the left-hand end in the housing 82 and journaled at its right-hand end in the back rest 50. The feed screw 403 screws in a nut 404, and when the feed screw 403 is rotated in one direction then the saddle 41 is moved from the right to the left, and when the feed screw is turned in the opposite direction then the saddle 4 1 is moved from the left to the right. When the desired position has been reached then the operator on moving the handle 284 disengages the key 275 from the key groove 401 of the gear wheel 400 so that further rotation of the latter is stopped.

In order to permit the operator to adjust the saddle 41 to the right or to the left by hand, the following arrangement is made: On the left-hand end of'the feed screw 403 is secured a bevel gear wheel 410 in mesh with a bevel gear wheel 411 secured on the inner end of a transversely extending shaft 412 journaled in suitable bearings in the housing 82. The forward end 413 of the shaft 412 is made polygonal to permit the operator to apply a wrench or other tool for conveniently turning the shaft 412 in either direction to rotate the feed screw 403 in the same direction with a view to adjust the saddle to the right or to the left as desired by the operator.

Platen adjusting deoice.

In order to feed the platen 43-by power in a transverse direction on the saddle 41, the following arrangement is made: @11 the slip shaft 272 is mounted to rotate loosely a gear wheel 420 having a groove 421 adapted to be engaged by the key 275 at the time the pin 285 of the handle 284 engages the apertures 289 (see Figs. 1 and 18). When the key 275 is in engagement with the key groove 421, as shown in Fig. 12, then the rotary motion of the slip shaft 272 is transmitted to the gear wheel 420. A gear wheel 422 is in mesh with the gear wheel 420 and is secured on the left-hand end of a platen shaft 423 journaled at the left-hand end in the housing 82 and at-its right-hand end in the back rest 50. On the shaft 423 is mounted to rotate loosely a spiral gear wheel 424 in mesh with av similar gear wheel 425 (see Figs. 14 and 17) having a key 426 engaging a key groove 427 formed in a transverse feed screw 428 screwing in a nut 429 secured to or forming part of the saddle 41.

The spiral gear wheel 425 is provided with a clutch member 430 (see Fig. 17) adapted to beengaged by a clutch member 431 mounted to turn with and to slide lengthwise on the shaft 423. The clutch member431 is engaged by a shifting lever 432 fulcrumed at 433 on the saddle 41, and the said. shifting fork 432 is connected by a link 434 with a hand lever 435 fulcrumed at 436 on the saddle 41. A spring 437 is coiled on the link 434 and rests with one end on the saddle 41 and with-its other end on the right-hand end of the link 434 to normally hold the clutch member 431 out of engagement with the clutch member 430. \Vhen it is desired to shift the platen 43 in a transverse direction on the saddle 41 then the operator, after adjusting the handle 284 as above explained to cause the rotation of the shaft 423, moves the hand lever 435 rearwardly into the position shown in Fig. 1'7 whereby the spring 437 I is compressed and the shifting lever 432 moves the clutch member 431 into mesh with the clutch member 430 to rotate the latter and the spiral gear wheel 424. The

rotary motion of the spiral gear wheel 424 is now transmitted to the spiral gear wheel 425 which in turn by its key 426 engaging the groove 427 r0tates.the feed screw 428 which bythe nut 429 imparts a transverse sliding movement to the platen 43 on the guideways 42. of the saddle 41.

The platen feed screw 428 is journaled in suitable bearings 439 (see Fig. 2) attached to the platen 43 and the forward end 440 of its feed screw is made polygonal to permit the operator to apply a wrench or'a similar tool for turning the feed screw 428 by hand wheneverit is desired to do so. After the desired adjustment is made the platen 43 is clamped to the saddle 41 by the usual clamping device controlled by a handled nut 441, as indicated in Fig. 1. By reference to Fig. 12, it will be noticed that cam washers 450, 451 and 452 similar to the cam washers 197, l98and 199 are interposed between the gear wheels 276 360-, 3 60 400, and 400 420, to coact with the key 275 in the same manner as the key 190 coacts with the cam washers 197, 198 and 199, as previously explained. The

key 275 is also pressed on by a springpressed rod 453 to insure the engagement of the key with the corresponding groove 277, 361, 401 or 421, the same as above described relative to the pin 203 pressing the key 192 as shown in Fig. 11. The back rest 50 is adapted to be shifted by hand lengthwise on the guideways 40 of the bed 30, and for this purpose use is made of a transverse shaft 460 (see Figs. 15 and 16) journaled in the base of the back rest 50 and having its forward end 461 made polygonal for the application of a wrench or other suitable tool.

On the rear end of the shaft 460 is secured on the feed screw 403 moves the back rest 50 either from the right to the left or from the left to the right according to the direc tion in which the shaft 460 is turned at the time. It is understood that when the feed screw 403 is rotated, as previously explained, then the Worm wheel 461 rotates loosely and with it the shaft 460 without affecting the position of the back rest 50.

In order to counterbalance the head 33, use is made of a weight 470 supported on one end of a cable 471 passing over pulleys 472 and 473 journaled in a bracket 474 arranged on top of the headstock 31. The forward end of the cable 471 is connected at 475 with the top of the head 33 to counterbalance the latter and thus insure an easy When the operator turns the adjusting the latter either by power or by hand.

When operating on very large and heavy work, use is made of a correspondingly large saddle 600, shown in Fig. 19, mounted to slide on the guideways 40 of the bed 30 provided on the front and rear with longi tudinal tracks 601 on which travel rollers 602 journaled on the under side of the front and rear extended portions 603 of the saddle 600 to properly support the saddle and to allow of easily moving the same along the guideways to a desired position on turning the feed screw 403.

. The operation is as follows:

The article to be operated on is fastened in the usual manner on the platen 43 and then the platen with the work is shifted Y transversely on the saddle 41 either by hand or by power, as above explained, until the position of the work to be operated on is in vertical alinement with the spindle 34. The head 33 and with it the bearing 52 is next raised or lowered by hand or by power, as above explained,-to move the. cutting tool in proper relation to the work. Presuming the work is to be bored by, say, a boring tool 57 attached to the extension bar 54 of the spindle 34, then the operator first swings the lever 80 to the right or to the left to engage the double clutch 74 with either the clutch lever 116 to engage the connecting gear wheel 112 with either pair of gear wheels 100 105, 101 106, 102 107, 103 108, and 104 109, to rotate the shaft 110 at a higher or a lower rate of speed according to the number of revolutions at which it is desired to run' the spindle for the particular work in hand. Therotary motion of the shaft 110 is transmitted by the gear wheels 120, 121 to the shaft -123 which by the gear. wheels 130, 131 rotates the shaft 132 and the rotary motion of the latter is transmitted to the spindle 34 by the gear wheels 136, 140 and the clutch 145 controlled by the lever 149 shifted by the operator from the left to the right whereby the spindle 34 is driven clockwise for the tool 57 to bore the work.

In order to feed the spindle 34 from the left to the right according to the desired speed, say for instance, very slow for very heavy work, then the operator swings the lever 173 upward to engage the double clutch 170 with the gear wheel 160 to drive the con- CLO 182 and 186 (see Fig. 8). The rotary motion of the shaft 190 is now transmitted by the gear wheels 2-26 and 227 to the shaft 229 (see Fig. 9). The operator now swings the handle 243 from the left to the right until its pin 244 engages the last aperture 245 at the right of the dial 246 whereby the key 238 is engaged with the gear wheel 235 which now rotates with the shaft 229. The

rotary motion of the gear wheel 235 is transmitted by the gear wheel 250 to the shaft 253 (see Fig. 12), which by the gear wheels 270, 271 rotates the slip shaft 272. The operator next swings the handle 284 from the right to the left until the pin 285 engages the aperture 286 (see Figs. 1 and 18) and b this movement of the handle 284 the key 27 5 is shifted to connect the shaft 272 with the bevel gear wheel 276. The rotary motion of the latter, is transmitted by the gear wheels 291 to the shaft 292 which by the gear wheels 293, 294 rotates the vertical shaft 295. The rotary motion of the shaft 295 is transmittedby the gear wheels 300 and 301 to the shaft 302 (see Figs. 6, 7 and 14) which by the worm 310, worm wheel 311 and clutch 314 rotates the shaft 312 which latter by its pinion 315 engaging the rack 316 imparts movement to the sleeve 3-17 and consequently to the feed spindle 34 from the left to the'right at the lowest speed.

If the spindle 34 is to be fed forward, that is, from the left to, the right at gradu-allyhigher rates of speed then the operator swings the handle 216 from the left to the right to engage the pin 217 withthe nextfollowing apertures 218 and whereby the key 192 is shifted into engagement with the corresponding gear wheels 187, 18 8 or 189. If a still higher speed for the spindle 34 is desired, the operator swings the handle 243'from the right to the left to engage its pin 244 with the followingaperturesj 245 and by this movement of the handle 243 the key 238 is shifted out of engagement with the gear wheel .237 and into engagement with either gear wheel 236 or 235 (see Fig. 9).

In case the work in hand was tapped and it is desired to reverse the rotation of thespindleand to feed the same rapidly from right to left to run the tap out-of the work, it is necessary for the operator to first swing the lever 173 into neutral position to disconnect the double clutch 170 (see Fig. 8)

from the gear wheel 160. The operator,

then the operator manipulates the levers 344 to disengage the clutch members 314 (see Fig. 6) from the clutch members 313 to disconnect the worm wheel 311 from the shaft 312 thus stopping the power-feeding movement of the spindle 34. The operator now on turning the levers 344 causes the shaft 329 to rotate which by the spiral wheels 333 and 334 turns the shaft 312 thus impartinga hand feeding movement to the spindle 34 either from the right to the left or from the le'ftto the right according to the direction in which the levers 344 are turned by the operator.

If it is desired to turn the spindle 34 at the highest speed then the lever 80 is swung from the right to the left to engage the clutch 74 with the clutch member 72 to drive the shaft 92 from the main shaft 60 by way ofthe gear wheels 70 and 90. The operator now shifts the handle 116 to engage the connecting gear wheel ,112 with the'pairof gear wheels 104 and 109 to rotate the shaft 110 at the highest speed. The rotary motion of this shaft 110 is transmitted by the gear wheels 108, 160 to the gear wheel 256 (see Fig. 14). The operator now, swings the lever 265 upward to shift the double clutch 262 into engagement with the clutch member 258 ,of the gear wheel 256 so that the rotary motion of the latter is transmitted to the connected shafts 255, 253. The rotary motion of the shaft 253 is transmitted by the gear wheels 270 and 271 to the slip shaft 272 which by the gearing previously described rotates the spindle 34 at a high rate of speed. It will to the shaft 263, is out out while a drive is hadfrom the gear wheel 160 to the shafts 253 and 272,-as above explained.

In order to run the spindle 34 in a. re-

verse direction at a high speed then the operator throws the lever 265 downward to disengage the clutch 262 from the clutch member 258 and its gear wheel 256 and to connect it with theclutch member 259 of the gear wheel 257 to rotate the connected shafts 255, 253 from the gear wheel 165. If a "dir ctdrive with a low speed is lesired theoperator shifts the lever 116 correspondingly toengage the connecting wheel 112 with either the pairs of gear wheels 103 10 8, 102 107, 101 106, or 100 "105.

' For drilling, tapping and milling pur-

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