US1239268A

US1239268A - Tool and work holder and driver.

Info

Publication number: US1239268A
Application number: US10065616A
Authority: US
Inventors: James H Hammon
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-05-29
Filing date: 1916-05-29
Publication date: 1917-09-04
Anticipated expiration: 1934-09-04

Description

1, H. HAMMON.

10m AND WORK HOLDER AND DRIVER APPLICATION ULEB MAY 29,19l5.

1,239,268. PatentedSept. 4, 1917.

2 SHEETSMSNEE l.

INVENTOH:

JAMES H. HAMMON, OF VINCENNES, INDIANJH T001 AND WORK HOLDER AND DRIVER.

Specication of Letters Patent.

Patented Sept. 4, 1917.

Application tiled Hay 29, 1916. Serial No. 100,658.

To all whom. t may concern: i

Be it ,known that I, J AMES H. HAMMON, a citizen of the United States, residing at Vincennes, in the county of Knox and State of Indiana, have invented a new and useful Tool and Work Holder and Driver, of which the following is a specification. reference being had to the accompanying draw ings and to the letters and figures of reference marked thereon,

This invention relates to holding and driving mechanism for tools and work or articles to be Worked on by the tools, the in'- vention havingreference more particularly to mechanism that is adaptable for lensgrinding machines or for machines in which cams or eccentrics may be produced.

Au object of the invention is to provide an improved mechanism that shall be so constructed as to be useful for various urposes and more particularly for hol ing and driving tools and work when it is required to produce curved surfaces, such as spherical, cylindrical or toroidal lens faces, or cam or eccentric faces on parts of machinery.

Another object is to provide improved gearing for the above mentioned purposes and means for mounting the gearing on various machines where required,.and which shall be capable of doing'work expeditiously, accurately and economically.

A still further object is to rovide gearing of the above mentioned character that shall he so constructed as to be adapted to be variously driven or operated by means of various types of machines.

With the above mentioned and other objects in view, the invention consists in an improved tool holder and driver and :in improved work holder. and gearing adapted for rotating the tool holder and the uork holder at one and the same speed; the invention consisting further in the novel parts, and in the combinations and al rangements fof parts, as hereinafter particularly described and further set forth in the accompanying claims- Referring to the drawings, Figure l is :1 front elevation oi' l suitable type of lensgrinding machine to which the improved mechanism is applied as illustrating one of the purposes of the invention; Fig. 2 is u. perspective view of one form of lap that may be used in connection with the iniroved mechanism; Fig. 3 is a top plan of F ig. l partially broken away and minus the iep; Fig. 4 is a central sectional elevation of the grinding machine and improved mechanism; Fig. 5 a. perspective view of a frame member of the improved mechanism; Fig. 6 is a central section of the principal elements of the improved mechanism; Fig. 7 is a pers active view of one of the gear wheels of t e mechanism; Fig. 8 is a front elevation of a turning lathe equipped with the invention as illustrating the manner in which the mechanism is adapted to be employed for producing cani or eccentric faces; Fig. 9 is a transverse section ap proximately on the line A A on Fig. 8; 10 is a .fragmentary section approximately on the line B B on Fig. S; Fig. 11 is a central section of the improved mechanism slightly modified so as to be ada ted for producing cams or eccentrics; F i 2 is a sectional detail of the Work holder Sii htly modified so as to hold and drive a mling tool; and Fig. 13 is a erspedtive View of the elements shown in t 1e preceding figure.

Like characters of reference on the various figures of they drawings indicate like elenie-nts or features of construction herein referred to in detail.

The invention being especially valuable in the rapid and accurate shaping of the surfaces of lenses, and particularly such as those designed for eye-glasses, the invention will be first described as applied to a lensgrinding machine which comprises legs or a support` 1, upon which is a table 2 that usually supports a -pan 3. the table being provied with a journal box 4 in which a vertical driving shaft 5 is rotatably mounted und provided with means for driving it, usually a pulley 6. The table has a suitable standard 7 thereon outside of the pan, the top of the standard being adapted to support parts of the improved mechanism and preferably provided with a stud 8, on which is a nut 9 and a washer 10 under the nut. An arm 11 is arranged upon the standard and extends over the top of the pan 3 and is secured to the standard by means of the stud and the nut, the arm preferahl having a slot 19 therein reoeivin f the stu so that the arm is longitudinaly adjustable on the standard. The frame arm 11 is provided with a hearing boss 13 which is provided with a set-screw 14:, the boss being adapted to su port a frame member of the mechanism eit ier movably or fixedly to permit adjustment of the member.

Forthe purposes of the invention as ap plied to a lens-grinding machine a toothed driving wheel 15 is secured bo the shaft 5 above the bottom of the pan 3, the wheel having a hub 16 on its upper side provided with a set-screw 17 wherebyr the wheel in the present case is secured on the shaft. The top of the hub has a socket 18 therein that is adapted to receive the shank 19 of a. lap 20 which may be variously shaped, in some cases having a convex working face 2l adapted for grinding` a cylindrical lens face thereon, in seine cases havin a face 22 that is convex to a greater degree in one direction than in the transverse direction.

The invention includes a frame member which comprises a main portion 23 having a cylindrical portion 24 whereby the member is supported, and when connected with a lens-grinding machine is vertically ar ranged iii the bearing boss 13 and supported for vertical adjustment by means of a collar 25 having a set-screw 26 whereby the collar is adj ustably secured on the supporting portion 24, the collar normally resting upon the hearing boss. The main portion 23 and the portion 24 are hollow, a` bore 2i' extending therethrough and provided with

journal boxes

28 and 29 in which a main shaft 30 is rotatably mounted.` A toothed wheel 3l is xed on the shaft 30, preferably being advinstable on the slnift, and the frame arm 11 eilig properly adjusted, the wheel 30 is maintained in inesh with the driving wheel 15. Another toothed wheel 32 is fixedly secured to the upper portion of the shaft 30 and is supported upon the frame portion Q3 or the journal box 28. The fraiiic member comprises also an arm 33 which is lined to the main portion :'23 and the arm has a journal box 31 thereon in which is a bore 35 parallel lwith the main shaft 30. vAnother toothed wheel 36 is provided which has :i journal 3i' on its normal under side that is rotatably arranged in the bore 35 of the box 34, the wheel 3G beingr in 'mesh with the wheel 32. Preferably the wheels 3l and 32 are of equal diameter and 15 and 3G of equal diameter.` `it being essential that the wheel 36 be rotated at the saine rate :is the wheel 15. A bore 38 extends through the wheel 3G and the iournal'37, the upper portion of the wheel 36 having;` a vertical socket 39 therein. The wheel 36 is arranged upon the top of the journal box 34, and the lower portion of the .journal 37 is provided with a collar 40 ari-aimed at the under side of the journal box. shaft-or tool-spindle 41 is arranged so as to be longitudinally movable in the bore 38 and has a collarQrseeured to the' upper portion thereof, preferably adj ustable by means of a set-screw 43, the collar being provided with a dowel-pin 44 that extends into the socket 39 whereby to enable the wheel 36 to rotate the shaft 41 and pci'- niit the shaft to be adjusted rotatively in the wheel 36, the shaft being readily moved longitudinally by hand by means of the collar. Near its lower end the shaft 4l is provided with a sprin -seat 45 on which a spring 46 is arranger that is seated against the lower end of the journal 37, for normally forcing the shaft downward. The lower end of the shaft 41 is provided with a ball-shaped head 47 having a transverse driving pin 4S, for rotating a lens holder or block 49 which has a socket therein to ieceive the head 47 and a slot 50 to receive the pin 48, so that the holder may wabble as it carries the lens blank 51 and rotates it upon the lap.

As illustrating another one of the uses to which the invention is with slight modification adaptable, the mechanism is shown as it may be conveniently applied to a turning lathe, a fariiiliar type of whirh comprises a bed 52 oii which is mounted a` head stock 53 and a tail stock 54, the latter supporting a spindle 55 carrying the dead center 56. The live spindle 57 is mounted in the head stock and usually carries the live center 58, the latter in the present case, however, being otherwise carried as will be further exlaiiied. A carriage 59 is mounted on the )ed 52 and supports a transversely movable slide 60 which carries a tool post 61 provided with a setscrew 62.

The invention includes a spindle section G3 which is provided with a socket 64v that is screwed onto the end of the spindle 57 in the place usually occupied by the face platev of the lathe, so that the spindle section praetically constitutes a portion of the driving shaft of the improved mechanism and has a toothed wheel secured thereto and beyond which the face plate 66 of the lathe is screwed onto the spindle extension, the latler receiving the live center 58 in its end. The wheel 65 corresponds in diameter to the wheel 15. The frame member of the improved mechanism is conveniently supported by nir-:ins of an arni 67 which is secured to the rear side of the lied 52 and extends npwai'd and forwardly and is provided willi a bearing boss G8 which receives and rotatively supports the cylindrical portion 24 of the frame member, the portion 24 havingr a collar 25 on one side and a similar collar 25' en the opposite side of the boss. the collars preferably being adjustably secured in place. The arrangement is such that the portion 24, of the frame member is horizontally supported Vabove the blank 69 that is to be worked on, and which has an arbor 70 that is supported by the lathe centers, the

blank or its arhol heilig driven by suitable means such as a carrier or doo lois-*ing eennections with the fue@ plato of tho lathe. Thus arranged the wheel 3l 'is meintained in mesh with the wheel G5 for roi uiting the iii-fain shaft 30 and algo the wheel 525. ln this en rangement the set-Screw lil omitted from the bearing bone in order to permit the arm 33 to swing Slightly about the shaft 3C?.

The devices whereby the tool is carried end driven are slightlyr modii- `l Whe the mechanism required to ope-reto e` milling.; tool or other type of iool in si inthe or torn ing machine. A. toothed wheel 3%' corre-- eponding to the Wheel 36 ie provided with a journal 37 oorreeponding to Lin; joimlnl il? and rotatably mounted in the join-ml l-o 34, the wheel 36" being in mosh. with the wheel 32. A spindle oxfehel't 7l is armnfed in the wheel 36 and itsnjoinnah so ne to he rotated thereby and permit longitudinal movement of the Spindle7 the leiter prefer ably being provided with a snline *l2 adopted for the pnrpoee. A suitnlllr milling tool YB is secured to the spindle or eli-.itt "Jl mol may be variously cnmtrncted lo details and contour, the peripheral con-tolli of the tool determining `the peripheral simile of the finished Work produced on the lnlilnl., tlmt of a cam or an eccentric A eoll'ar il le ilocurefkln fixed on the spindle or sliel't 7l :and between item1 the hub of the lool e box is arranged and permits the spindle to 1 thereon the len; honig ermugod in o enI l holder wlnlh loog rf nous@ .i lnlr Til t* le secured m the tool met of they luth and provided with wie 'j' T in wrioll tlv? i H; 1I-w la Y :u 1e errang: l mi onwil Ll-lgoe to guide the i lin-.llo ox il om* und parallel n m2o. Work 69 or Ito Lu'lioi, l

.l fo moe we spindle 7l longitudinally in order to fred thetool along the luce of lli(- hlank to produce a peripheral tace T8 col-responding to the peripheral vontonr of tho tool, the feeding being accomplished in the usual man nel' by the lathe mechanism. and the ndjnzstnient of l'he tool to ille rio llt-ing eccomplir-lled through the odio nent of the tool post on the onwillige ot' tho lathe :is is one tolnary.

In the description of the imuifnnienl :te employed for different purpoees, it has heen explained that the driving shaft carries -the tool and the driven shaft or spindle carries the work in a lens-grinding mztcliinc, and that in thu :applivution of the mechanism to :1 turningiu-lf-liine the tool is carried hy the driven shaft or' spindle while the work is 'lrixn and muy lao married liv he driving Shaft. It i5 nhvions thcroloie that either relative zumngi-invul; of the work and the tool may he resorted to, according; to circumstances or requirements, :t being evident howeven that in either ease the work holder and tho tool holder nre ioteted'sn parallel axes et th suono Hinwil :and in the sinne di motion.

reptil? sind el 'oilily ir-Mall sie' 5m The elisifte or Eoinllos :tn-v vertically ranged :is :1 mutter of expediency. YWinoo the improved i'oefrlmniein le omglloveul lo? producing oaxns or Comunit-ivo the Shafts of #if ile ol' the nlelflmnif-:m :we more con emilio@ ilr lllim gllwlill lul' shrill 'Il 1f vontl'ollocl :is may lio dosilxli or ilfnuizwi 'in ordssi that the lons-'linko of" ho iinl'liw wft om-l"Air nl :shall lo performed plated;

Having time, doelrlwel the intention, what fl-iiiowo :is new l, tool :irri "-Aolli lmlllm' and l' L sapporliolfI-:im lowing; i limiL4 ing-miete nml lluffimgf .liso o lmet, portion lo im voort-tl lm' wwwaot on :1 mail] oppor-t. fi 'iffrmw inwol lmp-:lng iw-nmol l'olzlY liwljv' llfzaloiml n llil-` :Ulli lzrll in; Also :an :um wml-[lul il o. ioiilllul imm. :l eliindle! volmoolonl--d in liza join nel 'box and provi-'lo l with e toothed driven wheel for rotating it.y :i onlin Slol'lt rotatably mounted in the tramo member und extendim;l therethrough nml also through the jour nel thereof, :l lootliml wheel secon-l to the 11min Hlinft :1mi meshing with the driven wlwol, :i` rotatable toothed lllixinff lslifwl` :unl :i tooihed rmiwlwol secured to llo malin s eff, ond meshing with the driving wht-el.

i?. A tool and work holder :nld driver including a supporting-:urn having n beure ing-hose end having also e hase portion to he secured to e main support, n frame momber beting e. cylindrical portion and :lisov an :arm provided with u journal bon` the cylindrical pol-lion lio-ing rota-tively eupglwlwl in iho heen-ing bose, n toothed i1-imm oli-,rel lowing t hollow journal rotatably mounted 'in the joui-nul box` 1i :spindle tending llnomfn the driven wheel :md its; lomrrod to 'he rotated lherehy, the Spindle being longitudinalily-movzible :md adapted 1 1 i Low mi; Lm) mi) lllll to euri-)f inni li-iw a rotary operating deviem a main shaft rotinnblj' mounted in the traine meiber, :i toothed wheel seenreizl to the mein slnilt and meshing with the [lr-iron wheel` :1nd (hiring monthl omineoteil with the moin shaft'.

t il. fool :mii Wbrh hol/ier unil ihiwr inolinlinff :L imported henringhlioezfi. :i rnintnblrdriving npnnlh. :in extension .spindle having n socket connected to the driving spindle und provided with :i rarrier eleriee. :i frame member roteively nionntedin the bearing boss and haring nl :mn thereon and provided with :i journal box, a toothed driving Wheel secured no the extoiriion soindhn :i milio ehn'lt rotnt'fiblv mounted in thv immo iin-miller. n iliwn Hpinilie iwf-stably monntod in the journal box :ind inovzble limigjifndinnlly Herein, a` toothed driven whwfl for rotating the driven lnpiznle von neen-Ll with :1nd permit ng hingzitndiniil movement of the nplmile` a toothed geni nhs-ei moreel to the main shaft'. and megan in; with the drivin wheel, n toothed Een? wheel seemed to ihr.A mitin shaft and meeleinn with he driving; wheel, :ind an oneint ing: ilovice secured to the driven epiniile fl. ln :e lool und work holder and llriier1 the ronibinntion with n` main Support` noel n drivingr shalt rotatably mounted in the sujigiorr, of :a footbed driving wheel romeniA ed on the driving shaft to be :'otneil therein sind having :i carrier device to be rotated in' menos of the driving' slniit'. n frame men bei` :nippon-ieri by the rollin enpport and hui;- ing en Hrm thereon lhn in provided. with e journal box, u onlin shaft i'ofatably mount-- ed in the ironie rnonihor, a iootheil wheel ir-mired lo the onlin shaft and meshing with the driving wheel ai footbed liiron Wheel boring u bollo joornnl rotatably mounted in` the jonrnnl box. n toothed wheel Hei-nrefl so the :nain elnifl anni ineihing' with tho riwn Wlnel. :unl i spindle extending: cnronji the driven irlniel :nifl its journal lo iw, Votami ilnrobjz ille spindle being lon'- nitni-'Einiilijf movable-i and beingr adapted to 'nrrji und drive u rotary operating: device. ln :i lool :mil noa-lr holder und iriver` through the driven mamas frame, a provided with the combination, with :i miiehine driving spindle. on the frame i1 toothmi driving.;l wheel, n ein-rior device oonnecfted with the driving' spindle. nml an :intonmtie tool-feeiling mechanism` of a. bearing boss stationnrily mounted on the muohio@ frame :i frame member rotutively mounted in an@ supported by the bearing hose" the frame member thereon psovided with a journal box, a main film ft roinzznbly mounted in the frame member, :a toothed Wheel secured to the main Shaft und meshing with the driving Wheel, n. driven tool carrying' spindlel rotatably mounted in the journal box and movable lmigitndinully therein. a toothed driven whe-el eonnerted with the driven Spindle for rotating the spindle, :i toothed'gear Wheel eUni-oil to the main shaft und meshing with the driven wheel, :lndlneims for connecting rh-f lool feeding mechanism with the toolsim-*ving Spindle to longitudinally move the iooinniarrying epindle.

o. In. :i tool and work holder :incl driver, the f-omliiinntion with uy bearing bons, of a mlon' frame mewbel having :l lateral arm nem' ono end thereof, the member having a aylinilriral portion extending from the oppositn und thereof that is rotatively mounted in the bearing bossi the :irm being provided with a journal box, journal bearings supported in the frzune member adjacent to the ends thereof, a main shaft rotatively Snppm'ted by the. journal bearings and provided withedriving devieea toothed. driven wheel having si hollow journal rotatably mounted in the journal box. a toothed wheel secured to the moin shaft and meshing with the driven wheel, a spindle extending wheel and its journal to be rotated thereby, the spindle being' lonzitlzdinally-niovable. and the spindle longitudinally in one direction. In testimony whereof, I alix my signature presence of two Witnesses.

JAMES H, HAMMN.

Witnesses CHARLES CROWLEY, HARRY R. LEWIS.

having i lateral armK means for moving"