US1338819A - Cutter-head - Google Patents

Description

D. J. DIXON.

CUTTER HEAD.

APPLICATION FILED JUNE 4, I917.

1,338,81 9. Patented May 4,1920.

4 I m H INVENTOR' 42 2 0/IV/0 J UIXO/Y ATTORNEY DAVID J. DIXON, OF TACOMA, WASHINGTON.

CUTTER-HEAD.

Specification of Letters Patent.

Patented May 4, 1920.

Application filed June 4, 1917. Serial No..174,620.

To all whom it may concern:

Be it known that I, DAVID J. DIXON, a citizen of the United States, residin at Tacoma, in the county of Pierce and btate of Washington, have invented a new and useful Improvement in Cutter-Heads, of which the following is a specification.

This invention relates to improvements in lathe heads, or cutter heads, that are used for turning round handles of tapering or irregular shape, and the object of this improvement is to provide a strong and simply constructedlathe head of this class that is automatic in its operation and-has a very large capacity.

In the accompanying drawings Figure 1 is a somewhat diagrammatic view in side elevation of'a well known form of handle turning machine upon which this lathe head is installed; Fig. 2 is a detached view in side elevation of the head itself; Fig. 3 is a view in end elevation on broken line 3, 3 of Fig. 2 of the head showing the disposition of the roughingknives; Fig. 4 is a view in cross section on broken line 4, 4 of Fig. 2 showing the shaping or finishing knives in elevation; Fig. 5 is a view in cross section on broken line 5, 5 of Fig. 2 showing adjustable guard or guide members; Figs. 6, 7 and 8 are views of details of the invention respectively and Fig. 9 is an enlarged view in cross section substantially on broken line 9, 9 of Fig. 1.

Referring to the drawings throughout which like reference numerals indicate like parts, the numeral 10, Fig. 1, indicates a frame that is mounted on legs 11 and provided at its forward end with a guide 12 that serves as a support for bars or blanks of wood from which the handles are to be turned.

13 are feed rolls, preferably roughened or scored, that are mounted side by side on the forward end of the frame 10 to engage with and feed the blanks forward to the lathe head.

14 and 15 are two pairs of grooved feed rolls that are mounted on the rear end of the frame 10 and adapted to engage with and remove the finished handle after' ithas passed through the lathe head.

The rolls 13 are each mounted on a vertical shaft 16, only one of which is shown, and the shafts 16 are geared together'for simultaneous rotation thereof by gearwheels 17. One of the shafts 16is further provided with a bevel gear l8 that meshes with a corresponding bevel gear 19 on a horizontal shaft20 that is driven by a belt 21 which is connected with the main drive of the machine.

The rolls14 are driven in the same manner as the rolls 13 and the rolls 15are. driven from the rolls 14 by a well known form of at another point with a link 31, shown by dotted lines in Fig. 1, that is connected with a movable bearing 32 in such manner that the bearing will be reciprocated at varying speeds by the rotation of the cam 24.

' The lathe head itself consists of a hollow shank or mandrel 34 that isprovided on one end with two integrally formed disks 35 and 36 connected with each other in spaced apart relation by integrally formed spacing members 37.

The mandrel 34 is provided with a longitudinally movable bearing sleeve 38 that is.

splined thereon by means of a rib 39 on the mandrel and adapted to rotate within the bearing 32.

The construction of the mandrel 34, rib 39 and sleeve 38 are more clearly indicated in Fig. 9 wherein they are shown as supported for rotation in the two part bearing 32, that is connected with the link 31 so that it may be reciprocated to movethe sleeve 38, the line of cross section of Fig. 9 passing through the sleeve 38 but not through an annular rib that is provided thereon.

The bearing sleeve 38 is provided with an externally disposed annular rib 40 and is j'ournaled for rotation within the movable two part bearing 32. ,The bearing 32 has laterally projecting ton ues 41 that are slidably disposed in suita. 1e grooves in side plates 43 that are secured on the frame 10, as more clearly shown in Fig. 9. The lower portion of the bearing 32 is connected with the end of the reciprocating link 31 so that the hearing will be moved lengthwise of the frame 10 as the cam wheel 24 is rotated.

43 are guide members secured on the face or front side of the disk 36 on diametrically opposite sides of the concentric passageway or opening through such plate.

The inner ends of each of the members 43 is notched in the shape of a letter V as indicated at 44 so that the two members 43 form adjustable four point guides or bearings that engage with and hold the handles that are being turned.

45 are knife holding plates or members that are placed on the members 43 and secured to the disk 36 by tap screws 46 that pass through holes 47 and 47 in the plates 45,.and slots 48 in the members 43.

The plates 45 are provided with lugs 49 to which knives 50 may be secured by tap screws 51, the knives preferably being adjustable lengthwise of the lugs. The holes 47 are slotted, as shown in Fig. 7 to admit of a slight adjustment so that the knives may be tilted slightly toward or away from the handle that is being turned.

The slots 48 permit the members 43 to be moved radially of the disk 36 toward or away from the center of the disk, thereby affording an adjustment for handles of. a different size.

52 are two arms that are each pivotally secured near one end to the rear side of the disk 36 by tap screws 53, and 54 are knife holding elements or members that are secured to the arms 52 by tap screws 54, and provided with lugs 55 that are adapted to have knives 50 secured thereto. The tap screws 54 pass through slotted holes 59 in the members 54 so that a slight angular adjustment of the knives 50 is afforded.

The ends of the arms 52 are preferably rounded as at 52 and are adapted to project through angular slots 56 in plates 57 that are slidably disposed in holes in the disks 35 and 36, and are secured to a disk 58 on the end of the movable sleeve 38.

60 are guard members, see Fig. 5, that are adjustably secured to the front side of the disk 35 by tap screws 61 that pass through slots 62, the guard members each being provided with handle engaging elements 63 that may be adjusted to engage with handles of a different size by loosening the tap screws 61 and moving the members sidewise.

The shank 34 is provided with a fixed bearing 65 having annular ribs, not shown, thatvflt within annular grooves 66 in the shank to prevent endwise movement there of, and such shank is also provided with two fixedly mounted belt pulleys 67 and 68, the pulley 68 being located between the bearing 32 and the bearing 65 and being engaged by a power driven belt 69, and the pulley 67 being disposed on the extreme rear end of the shank 34 and serving as a driving pulley for the belt 21.

In operation the device is set up as shown in Fig. l, and the cam 24 is timed so that it will make one complete revolution while a handle is passing entirely through the machine.

The blanks from which the handles are to be made are usually rough square sticks, and as they are fed into the rapidly rotating lathe head, they are roughed or rounded off by the stationary knives 50 on the front side of the disk 36 to approximately the diameter the handle is to be at its largest place.

The knives 50 on the arms 52 are adapted to be moved in and out by the'cam wheel 24 as the handle passes through the head, and are thereby caused to cut shallow or deep and give the handle any shape desired: For instance, if the knives 50 on the arms 52 engage the butt of the handle when the cam 24 is in the position shown in Fig. 1, then the roller 25 will ride on the rounded surface of the cam and the arm will be gradually raised through the greater part of one complete revolution of the cam, thus causing the knives 50 to cut with gradually increasing depth from the butt toward the tip of the handle, and taper the handle from the butt to the tip thereof.

WVhen the roller 25 passes over the abrupt portion 24 of the cam, the lever arm 26 will be rather quickly lowered and the knives 50 again moved outward, thus causing a knob to be formed on the end of the handle.

As the plates 57 are moved lengthwise of the mandrel 34 the ends "of the arms 52 will slide within the angular slots 56 and the arms will be moved about their pivots 53, thus causing a variation in the depths of cut of the knives 50.

If desired, the arm 52 and knife holding member 54 may be made in a single piece, instead of being made in two separate pieces, as shown, but when this form of construction is used, the angular position of the knife 50 on the arm 52 cannot be adjusted. I

Manifestly changes in the precise form of construction of the various parts herein shown and described may be resorted to within the scope of the appended claims.

That I claim and desire to protect by Letters Patent is:

1. A hollow cutter head comprising a tubular shank, an integral disk on the end of said shank, a circular plate spaced from said disk and disposed in axial alinement and in a plane parallel therewith, said plate having a centrally arranged bore, integral segments connecting said disk and said plate, two guide members having longitudinal slots and arranged to be secured to the front side of said circular plate in diametrically opposite positions, said guide members having V shaped recesses in their inner ends which overlap the bore in said circular plate and form a four point guide and support for a circular piece of work, two knife holders provided with slots and arranged to be placed on the tops of said guide members, knives secured to said knife holders, and screws arranged to pass through the slots in said knife holders and said guide members to adjustably secure the same to said circular plate.

2. A hollow cutter head comprising a tubular shank having an integral disk formed on one end thereof, two integral segments projecting forwardly from said disk, said segments being disposed in diametrically opposite positions and each extending substantially one fourth of the way around-the central opening in said disk, two L shaped guide members adjustably secured to said disk by slot and screw connections, said guide members having guide arms that pro j ect inwardly between the ends of said segments in diametrically opposite positions and are provided with concave ends arranged to engage and support the work, a circular plate integral with said segments and arranged in spaced apart parallel relation with respect to said disk and knives associated with said circular plate.

Signed by me at Tacoma, Washington, 30

this 18th day of May, 1917. I

DAVID J. DIXON.

Witnesses JULIA B. SMITH, ERNEST B. HERALD.

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