US2000824A - Recessing cutter - Google Patents

Description

w. B. cRocKETT 2,000,824

'ECESS ING CUTTER May 7, 1935.

2 Sheets-Sheet l Filed Sept.

[4l/LL IAM `B. C'IMCKETT.v

May 7, 1935 w. B. cRocKETT 2,000,824

RECESSINQ, GLITTER Filed Sept. 13, 1953 y 2 Sheets-Sheet 2 Parental May 7, 1935 meeneem; entiteit' j wiu'im Bmw eeiec't o f tnefinventien ie te pifliviiie e eeni- Peet .teel ,0f this ehareete Whiehm'ey be .inserted g Snnfeeeefltthe tubef A further. ebieet ef the .inventien iste. Pref vVide a. device of chavrater iriludiiig simple meene 'ferfleegting tnefeiitter vvitiliinVL tnetiibe end ineensfer gauging the. extent .ef theeiit'- Afinrther'eiaieet e'f the inventien ie te .Previtie aY tool mede iin ef perte arranged je s iineie ene .eeinpaet manner' having e eneftdriven f r-ein :e

eenipeet newer unit- .i iliithA these end .etheit Objects in view., .ineinventien eeneiete'eeeentieilv ef tifie nevel eenetiiietieneiid' arrangement ef Perte deeeiibed the ielievvig eiieeifieetien end illustrate@ )in y,the eeeeinnenving drawings, Y .1n the erevvineer f Figure L1 ie ,e Side elevation Qfe'zteel. .ineeinplete' eeeeinblv Shevving. the eiitter end end" the eppeeed erfdriving end partly Section! er @ne trici-without ,ehe newer uint.; snewing it `.iiiiiiiiited,.in position 'te be' intresiiieee within e' tube'. f i' en enlarged lfregineeterv Yeievetien o f' the reer end ef the .teeivviiien .eenneete with the: p eiver unit illnetretingftiie geiige Sleeve.-

" Figure 4 iS en end elevetien 0f Figure .3,

. Figure@ ie .en en d yelevation ofthe Diiireiitv ef .,ee'vee feiining the. teel. but without the. eiittei 'operating Sheft end eiitter- Y i L f .Fignree 6 .end i eneideteil elevetiene ef Hthe eli? .eenetruetien fer ret.einiiig the .leeeting .meinber- FigureS is a. fragmentary V4illust'rgafti'ori of `the end efftne Cutting teel .iiliietretingtne n ieiintine ei the eheft by .meene elf eeeentiie ,eleeveel *the `Sleeves being .Shown 'in their neilmel Peetieii Figure 9 i.e .en ,end elevation ef .Figure .8

" Figure 12 is van end eleyadgorrof Figure irig the cutter disposed eelitrioally totheeasing, A

and

Figure 13Iis an endelevatioiiof Figure liwitgh .izheleiitterlremovged to show the positionofjhe e'entlrie sleeves and eeeing -vvnfen the sleeves e. e been eneretesi vte nreieettieeiitteieeeentiieeliv ofthe-easingmere .peinuieriye i -tiiefiiewef uniti thereien.

wiliin .tubes erfthe like teeiit inte the interim;

formed Crockett, N otrenmg de aise, i' Quebec, Genesi? Y September 1.3 ieee, Serigieieeeeee gemene... (0.1L zeges) i Instru tigre .tllie'pgter sleeve bilsh or cjgzsig LI is minted with en -enieiee'd iene" 12 beteiligten 30 .ti ef. .the eleeve fie' nieve@ ',freyli'fie nerinel P Qeitien 'teliieierzeee Ltne u here 'ef ,this

eieeve Jeiieiieeeentiiete theenteiieiinfleeei .Sleeve i;

te'r bia'd is projected beyond .sgr'fgmr ,m .Sleeve it en@ ifit A cutter Wiileiiggge withine wells there e eiiefte ivi its lower surface can be brought into engagement with theslveeve to hold it in a desired'position. The slot andV pin also serve to hold the collar from axial movement. A recessed `portion 28 is 'provided in the collar member Which registers with *Y the slot 2i, the recess extending over one-half the circumference of the collar so that it can bemoved to register exactly with the slotV 2 I. This will permit the lever 22 to be'moved 180 inthe slot and thus move the recessing cutter blade to anextreme position projected beyond the sur-V face of the casing AI9 or to a vposition in which the teeth of the cutterV are ush Vwith the surface of 'thecasing Vas shown in Figure 8.,

It will be further noted that the collar member V*24-isprovid'ed with a-seriesof graduations and thelarge Yend of the casing is provided with a projecting pin 29 with,which,thesergfraduations may be aligned so that'byyrotating the collar to align any given graduation with the .pin the recessed portion maybe caused to move out 'of full registry with thefslot V2I and thuslimit the extentto which thej lever may be: moved in this slot.. For instance, yas vshown in Figure 3, the lever` can only be moved one-half its normal amount becausethe collar has been moved to register its lowest graduation with the pin. If, however, the collar is rotated so as to cause the 5 graduation I lto register with pin 29 therecess will be broughtV into l' complete 'registry with the slot-2| to. permit maximum movement of the lever. Inthis way, thecollar and slot arrangementA provides means for gauging the depth of a recess rto becut since the operator may, by setting the collar, move the cutter Aeccentrically of the casing` to a desired extent.

Mounted on the casing or sleeve bush I9 is a sleevel 30 which may bel termed a locating member. This sleeve is designed for axial movement on the casing ISandrterminates adjacent toone end thereof. Y The sleeve is of a diameter considerably greater than the casing I9 so that when .the casing is insertedwithin the tube the end of the sleeve or locating member 36 may abutthe endof the tube to stop further movement of the casing into the tubes On the opposite end of thesleeve is mounted aspring clip 3l which carries a pin 32 havinga knurled operating4 piece 33.

" This pin isn designed to project through an orice in the sleeve 3U, as shown in Figure 2, and between the clip and thesleeve is provided a cam member V34 which isformed withv a curved lower surface `to snugly fit against the side of the sleeve. e The cam member is rigidly secured to the pin 32 so that it will rotate therewithv and'if it is given a Vturn of 90 the curved lower surface which forms .acam member during turning of the pin will loe-moved outof engagement'with the sleeve so thatV the Yends 35 of the cam member` (seeV ment with one another, the recesses beingiofla size to receive the pin 32. These recesses are disvure 1, the pin 32 is in a position registering with a recess V36 corresponding to the marking 3l. In thisy way the 'recesses 36 may be located to permit insertion of the'pin 32 thereinand it is only'necessary to rotate the pin one quarter turn v'to cause the. curved surface of the cam member 35 to again lie flush with the outer surface of ,theY sleeve, thus lowering the pin into the recess 36. Consequently, the recess in the end 'of the sleeve and the markings or recesses 3l constitute means for locating the pin and the recesses 36,"the recesses 36 locating the cutter blade in the tube since they vposition the sleeve 36 axially on -the casing I9 so that the ends of this' casing andthecutter project from the sleeve 33 Ato a greater or4 lesser extent.

In order to provide a guide and steadying mem-` .ber for the tool, a bracket or the like 39 is secured to the outer sleeve.30 and is provided with a channel 40 to receive the guide rod 4I which may be projected into an adjacent tube to that being recessed,and thus it will serve as aguide and steadying member for the tool when operating upon an adjacent tube. The outer casing and assembled parts of the tool are attached to the motor by means of a collar member 42 which is provided with a knurled surface for gripping purposes. cured by lmeans of a threaded bushing or the like 133 which is provided with Va iianged head as shown toVV abut a shoulder cut on the inside of the collar 42. VBetween the outer surface of The collar is sethis bushing and the collar in a recess formed .A

in the latter, a lock spring 44 is positioned in vthis recess and permits smooth rotational movement in a clockwise direction to screw the collar onto the screw threaded end 45 of the casing, but providessubstantial resistance to rotation in an anti-clockwise direction, thereby avoiding the possibility of this becoming loosened through vibration. When the motor is tted to the collar, the socket 46 in the driving spindle will engage theend I5 of the shaft VIll so that upon setting the motor in motionfthe shaft and carried cutter will be rotated. y y I l In one vof its Aapplications the device may be used vfor vinstance to remove copper tube beads,

such as shown at 41 .(Fig. 2) from the grooves of feedwater heated tube sheet holes when removing old copper tube for renewal purposes. Among other uses Yit may be applied to internally cut out tubes that have been expanded from the inside bore in such a manner that the outer wall of said tube isstretched or pressed into grooves in solid walls.v In fact its application is wide in the field of recessing and cutting.

In operation, assuming that it is desired to cut out the beads 47 kin the tubeas shown in Figure 2, the' cutter being y in the position illustrated in Figure lor 2which is concentric withthe outer casing 179, is inserted into the tube the distance the beads'are formed from the endof the tube. The loeatingxmember `or Vsleeve 30 Vmay be rst `adjusted through the pin 32 and the recesses 36 so Y Y 2,000,824 that when the outer end of the casing is inserted in the tube, the cutter will be positioned .in its proper place through the abutmentV of the end of the locating member with the tube sheet wall. According to the depth of the bead, the gauge collar 2l may be set so that its recess may be moved relatively to the slot 2| so that the collar will restrict the length of the slot 2| in the enlarged portion 20 of the casing I9 so that the lever 22 may be moved the appropriate distance to rotate-the sleeve bush i6, whereby the cutter is projected eccentrically to the required (extent. The gauge for setting the degree of eccentricity of the cutter as noted Vreads from l5to`10 representing .050 'inch to .0100 inch so that the cutter may be moved with accuracy to avery minute degree.`

When adjustment has been made, the motor'is set in operation and the cutter, rotated through theV shaft I0, will cut the required recesses, whereupon the severed parts may be removed in a practical known manner.

It is apparent fromthe foregoing that the tool I have produced is very` simple and practical and that it will provide for accuracy in operation, being compactin form and readily manipulated.

Various modifications may be made Vin this in- Y vention without departing from the spirit there- Aof or the scope of the claims, and therefore the exact forms shown are to be taken as illustrative only and not in a limiting sense, and it is desired that only such limitations shall be placed thereon as are disclosed in the prior art or are set forth in the accompanying claims.

What I claim isr- 1. AV recessing cutter comprising a shaft, a cutter mounted on the shaft, said shaft being mounted in a sleeve bush having an eccentrically cut shaft receiving bore, an outer casing-for said sleeve bush having an eccentrically cut bore for` receiving said bush, the boreV of the sleeve bushV and bore of the casing being normally disposed eccentric to one another whereby said 'shaft is concentric with the outer surface of the casing, a slot in the outer casing, a lever member projecting through said slot and mounted in the sleeve bush whereby on movementl of the lever in one direction saidsleeve bush is rotated to project the cutter eccentrically of the casing, means mounted on saidcasing co-operatingwith the lever and slot for .gauging the rotational movement of said sleeve bush, a power unit for operating the cutter and means for uniting the powenunit to the casing in operative connection withv the shaft. Y

2. The device as claimed in claim 1 in which means is provided on the casing for gauging the depth to which the cutter is projected in a tube or opening.

3. The device as claimed in claiml Vin which the means co-operating with the lever and slot comprises a collar mounted on said casing, said collar having a recess corresponding in size and designed to register with said slot to provide for maximum adjustment of the leven-said collar being rotatable to vary thedegree of registra-` tion between the slot and recess, and means `for securing the collar in adjusted position.

4. 'Ihe device as claimed in. claim 1 in whichV the power unit is secured to the casing bymeans of a rotatable screw threaded collarV and wherein:

means are provided for resisting rotational move-L ment of the collar in one direction. Y l e v5. In a -recessingV cutter .including a casing carrying a rotatable cutter and meansfor moving said cutter intoV cutting position, means mounted on the casing for locating thecutter at a given point within a tube including'y a slidable sleeve, aspring clipmounted on said sleeve, a pin carried by the clip designed to project through an orifice in the sleeve, said clip normally urging said pin towards the casing," the latter having a plurality of spaced apart aligned recesses, thek said pin being projected andv locked in said recesses'V by the clip when inregistry with the'recesses and cam means associated with the pin operative to hold said pin out of'said recesses. j

6. The device as claimedk inclaim 5 inwhich means is provided for locating said pin in registry with said recesses. f f

7. In a recessing cutter including a casing, carrying a rotatable cutterand means for moving said cutter into cutting position including a lever movable in a slot in the casing, means for varying the effective length of the slot comprising a collar rotatably mounted on the casing having a recess designed to register with saidA slotL 'f Y to a varying degree upon rotation of the collar',

the saidcollar having graduatio'ns'thereon and an indicating pin on said casing, co-operating with said graduations to gauge the degree of rotation of said collarand means'for locking-said Y A collarin a'given position. Y A

8. A recessing cutter comprising a shaft, a

cutter mounted on a,shaft,.a casing'having an..v

eccentric bore, means for projecting said cutter eccentrically of the casing including "an eccentrically bored sleeve mounted in the bore of *saidV casing and carrying said'shaft, and a lever connected to said sleeve, .the casing having aslot' through which said'lever projects, said slot be. I

ing of a lengthrtol provide for projection ofthe cutter to a maximum extent, and means for limiting the length of the slot for gauging thedegree of 'eccentric' projection of the cutter.

9. In a recessing. cutter including a casing carrying a rotatable cutter and means for movingr said cutter into vcutting position, means mounted on the casing for locating thecutter at ya given point within a rtube including a, slidable`r sleeve, apin mounted on said sleevedesigned to project therethrough, and spring means urgingY the pin towards said casing, releasable means for withholding the pin against the action of the pin in'registry with a, given recess whereby said i pin'will be projected into said recesswhen released.V f f f WILLIAM *BARNES CROCKE'II.

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