US2627147A - Toolholder for grinding purposes - Google Patents

Description

Feb. 3, 1953 v. s. ROACH TOOLHOLDER FOR GRINDING PURPOSES Filed Jan. 23, 1950 lll/Afm' IN V EN TOR.

VHB/12 S. Roach W2* ATTORNEY.

Patented Feb. 3, 1953` UNITED STATES vPATEIWI" TQFFICIE '2,627,147 `El*o'innnit 'Fon GR'BING "iftiii'si's "vefnsfizeacn within, kan. A#rmi/lic"ation"January 23, lsrialivo.'1&02067 vkvk3"olainiis. (C1. isi-*2m This invention relates, te? leile ll'wl, "'holir t0. hold 'the tQQlfOr grinding. and Shleilng purposes.. `Irinlany insiennes the lathe @0,01 is' Vor becomesvery shQI f lTQm use and fromv grinding to keepthertoglshgrp- .Y v

,The present msthnd. of; grinding .0r sharpening the tool is that the machinist will holdthetool, which `may not ybe over a q narter of anv ineh long 01 even less., hetweenhisnngsrsnnd against apower drivenA grinding .vl/11,961. t@ Shgpn the cuttingedge of the toolLor'e'ven 4to change the shape of thel tool A to better ,adapt Nthe 4tool to the job the tool isto. da .f'lhg-dfgn1tyris that the tool being so .shnrtdt isl dmglll' t0. holdA the vtool against the grinding Wheel.. 111th@ .Proper position to 'grindthetool nfihewvightor. desired place. Furthermore, inf gjr ind ir rg the tool, it is necessary vto..Dartig1-1x .grind the, .w91 and then-inspect the .tool.tqdstennnefwhether 01' not .the tooliis being nronerlrgronndsnd then the grindingo, thetoolis resnrnedto complete the4 job. Theptoolhaving onde been drenrioved from the grinding l vvhfe'eL itx diiricultubecause of` its small size tonreplaee 4themtool against y'the grinding ,wheelf4 in its A,Qrginjal ,positionmtov eemplete thqjobuof grinding.n `A still fiirther and serions digicnltv is. that, in hplflngts'uch a Smell tool against the.. grinding.. wheel 'the .i091 wi11 `euicklv heat .and burn, the macninistsnngers and `newiu teA fnrcedtodrnp thgtool whereby he mees the position n; which 1he"wasfn'olflirigf trie tool, and the positionyvilihaveto be re-established to proceed with the'g ri nding v This often eausesniisgrndingof the tooitvhich Willjha've to be correcte'and involvesfnrther or additional grinding and Wasting away of the tool.

Astill further diioulty fis. thatin holding seh a small tool against the grinding Wheel the VWheel Wiireateh tnetooi and jerk it frqmfthewmachinists hand whereupon the machinists vhand mightv be thrown against the `wh eel, or wedged between the Wheel and tool lrest or support of the grinder and badly injnre the"'machinists hand, even tothe extent or losing some fingers.

V In View of all ofbthese` diiiiiculties and. dangers, `I have provided I ny VimprovedV tool* holder that is designed to receive and solidly hold 'af small Vlathetool so that the toolrmay be easily and Aquickly placed win the" i091 helder and, @Genieten held .against the. grinding Wheel .i9 tneproner .or desired position with. Complet@ Safety t the I nachinist andWithoutudangerof burning his .fingersv If the,trouhleandfdsngers @n De" nftool homer, the maeiiinist'win" grind 'the' tool with moreconfldence and iciai'emand lwith nre accuracy and i all 'this "in 'milch "less i time and v vith much less wrk. Thesey and other'bjects Will be more fullyI dsribed'as this'dseription nr0gress`es, Now referring tothe accompanying' drawings 'in whieh similar' merals'bf" reference designate Fig. 1 and looking inthe of 'th'e'airows. Fig. 5v is aside vievgr of one of the' tool'liolder `jaws and supporting barrel'- therefor.

Fig. 6 is a side view oi t l 1e clampingtool holder jaw that is a companionA jaw to thevjaw shovvn inFig. 5. l

Fig. '7v is a detail longitudinal sectional "View through the gouter" end of the `tvvo tool holder jawsv and illustrating'hoyva tool "may beheld therein for grinding purposes.

Fig. 8 is an enlarged detail p erspeetive' view oi' la shortl toolsuch as may be held in the "tool holder for tool grindingpnrposes.

In the --drawings the tool holder device is shown ashaving an integrally" formed tool holder kjaw I5 andsupporting barrel I6 therefor. The supporting barrel I6 has'a bore I1 longitudinally therethrough, and 'a tool holder javi/ I5 that is positioned'on one sideof the 'end of the barrel I6 and is provided with a' ninety degree VV- "shaped longitudinally disposed groove I8 therein that faces the'longitudinal'center axis of the combination barrel-and'tool holderijaw I5-I6. The barrel IB 'is provided with a sloping end portion I9 thatslopes'f'rom'the-baseiof the tool holder jaw Iftoward thefoutencirole formation of the'barrel lpposi'te'thebaseof thetool holder jaw I5, tlieslope' I9 forming; a V-shaped opening between the slope 4I 8 and 'i'.hetool' holder jaw I5.

The device is prOVdedyvithA asecond tool hold-- er jaw' 20 'that is substantially the same length. as the t'o'ol holderjaw' I5. The toolI holder jaw 20 has one end bevelled"asiat4 2|. Immediately adjacent the sloping orj bevelled' portion 2 I `of f thetoolholder jaw 20 is'an outwardly projecting 'foot 'portion 22 'that nas"- a bore zsffuirethrgh,

aezmev' the wall of which is threaded for purposes that will later be made obvious.

The second tool holder jaw 20 has a longitudinally positioned ninety degree V-shaped groove 24 in the face thereof that matches the groove I8 in the tool holder jaw I5.

The tool holder jaw 20 may be placed against the tool holder jaw I with the grooves I8 and 24 facing each other and then slipped longitudinally toward the barrel I6 whereuponv the bevel 2I of the tool holder jaw will engage and be seated against the bevel I9 of the barrel I6, and the foot 22 of the tool holder jaw 20 will be loosely received in the bore Il of the barrel I6 in such a manner that the tool holder jaw 20 will be moved toward the tool holder jaw I5 as the tool holder jaw 20 is moved toward the barrel I6, and will be permitted to move away from the tool holder jaw I5 as the tool holder jaw 20 is longitudinally moved away from the barrel I6.

The device is provided with a handle and adjustment element B that is made of a single piece of material and comprises the handle portion 25, a lesser diameter portion 26a and a still lesser diameter portion 26, and a still lesser diameter and threaded end portion 21 that is threadedly receivable in the threaded bore 23 of the foot 22 of the tool holder vjaw 20, and the portion 26 is revolvably carried in the outer end of the bore Il and the portion 26a of the part B is revolvably carried in the end portion of the bore Il. The portion 26 of the part B is smaller in diameter than the bore Il of the barrel I6 to permit some side movement of the part 26 in the bore Il. The portion of the part B has a bore 28 therethrough, and the portions 26a, 26 and 21 have a smaller diameter bore 29 therethrough, the bores 28 and 29 being in axial alignment with each other and being positioned about the center longitudinal axis of the part B. The outer end of the bore 28 is threaded as at 38 for reasons that will later be made obvious.

The device is provided with an adjustable tool stationing element C having a head or handle portion 3|, a reduced diameter threaded portion 32 and a still more reduced diameter shaft portion 33. The portion 32 and 33 are slidably passable through the bores 28 and 29 of the part B and the threads 32 of the part C are receivable in the threads of the part B.

The tool to be ground is a tool similar to, or such as shown in Figs. '7 and 8. The tool may have various shapes but all the tools have a square or rectangular butt such as indicated at S4, and these butts 34 are many times very short, as short as one-eighth to one quarter of an inch.

Now to use the tool holder, the handle portion B of the tool holder may be turned to partially unscrew the threads 21 thereof from the threads of the bore 23 in the foot 22 of the tool holder jaw 20, whereupon the tool holder jaw 20 may move outwardly along the tool holder jaw I5 and the bevel 2| may slide sideways along the bevel I9 and allow the two tool holder jaws I5 and 20 to separate slightly and thereby increase the size of the square opening formed at the end of the tool holder jaws I5 and 28 by the two V-shaped grooves I8 and 24.

The opening I8-24 having been slightly enlarged, the butt 34 of the tool may be slipped between the outer ends of the jaws I5 and 20 and project longitudinally therefrom. The tool having thus been positioned in the tool holder, the handle B may then be turned to screw the threads 21 into the threads of the bore 23 whereupon the tool holder jaw 20 will be drawn rearwardly and the bevel I9 acting on the bevel 2I will force the jaw 20 to move toward the jaw I5 and thereby bind and hold the tool between the two jaws I5 and 20.

The tool being held in the manner above described makes it possible to grind the tool with perfect safety and ease, and therefore achieve a much more nearly perfect job of tool grinding and sharpening.

While the tool holder device as shown and described is probably the preferred form of the device, it is to be understood that such modifications of the device may be employed as lie within the scope of the appended claims Without departing from the spirit and intention of the invention. Now having fully shown and described my invention what I claim is:

l. A tool holder device of the kind described; said tool holder device comprising the combination of a barrel having a tool holder jaw integrally formed thereon and extending longitudinally from one end thereof and being wholly positioned on one side of the center axis of the barrel, one half of the end of the barrel opposite the said tool holder jaw being bevelled rearwardly from the outside toward the center axis of the barrel, a second tool holder jaw, said second tool holder jaw being substantially the same length of, and being positionable over the first said jaw, one end of the second said jaw having an internally threaded sleeve integrally formed thereon that is positioned concentrically about the center axis of the said barrel, one side of said sleeve being bevelled and being engageable with the aforesaid bevel on said barrel, a rotatable adjustment element, said rotatable adjustment element being revolvably positioned within said barrel and having one end thereof threaded into the said jaw sleeve, and stop means on said adjustment element and engaging the rear end of the barrel, an adjustable tool stop, said tool stop being threaded into the said adjustment element and extending therethrough and also through the first said adjustment element and between said jaws to engage the rear end of a tool held between said jaws to hold the tool in longitudinally adjusted position between the said jaws.

2. A tool holder device of the kind described; said tool holder device comprising in combination, a hollow barrel having a long tool holder jaw integrally formed on and projecting longitudinally from one end of the barrel and being wholly positioned to one side of the center longitudinal axis of the barrel, said jaw having a tool seat therein and extending the entire length thereof and facing the center longitudinal axis of the barrel, the nonjaw supporting half of the end of the barrel being bevelled inwardly and rearwardly toward the center axis of the barrel, a second tool holder jaw of substantially the same length as the first said tool holder jaw, one end of the second said tool holder jaw having an internally threaded sleeve element integrally formed thereon and the jaw end adjacent the sleeve being bevelled to match and lit against the bevel on the barrel, said second tool holder jaw element being opposingly positioned over the first said tool holder jaw with the bevel of the second tool holder jaw bearing against the bevel of the barrel and the internally threaded sleeve being concentrically positioned about the center axis of the barrel, the second said tool holder jaw having a tool seat formed therein that extends the full length of the jaw and complements the tool seat of the first said jaw, a tool holder jaw adjustment element, said jaw adjustment element being revolvable and partially carried Within said barrel and having one end thereof threadedly received in the said jaw sleeve, and means on the jaw adjusting element for stationing and holding the jaw adjustment element concentric in the barrel, and adjustable stop means carried by the jaw adjustment element for adjusting the longitudinal position of a tool held between the two tool holder jaws.

3. A tool holder device of the kind described; the combination and arrangement of the several parts of the device as defined in claim 2, said combination being further characterized by the said jaw adjusting element having a large and a smaller bore therein and each bore being axially aligned with the other and being joined together substantially mid-way between the ends of the jaw adjustment element and being concentric about the center longitudinal axis of the jaw adjustment element, said adjustable stop means for adjusting the longitudinal position of a tool held between the tool holder jaws being a shaft that is threaded into the larger of said bores for longitudinal adjustment thereof, and means of the exposed end of the shaft bywhich the shaft may be revolved for adjustment pur 6 poses, the inner end of said shaft having a long pin-portion as an integral part thereof and extending in an aligned position therefrom and being extensible between and substantially to the outer end of said tool holder jaws and being revolvably carried as a journal in a bearing in the smaller of said bores.

VERN S. ROACH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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