US939845A - Automatic prescription-lens-grinding machine. - Google Patents

Description

Patented Nov. 9,1909,

WPI-(Z, (Z3 mu-A170. frm/m' E.. o. MATTERN. AUTOMATIC PRESCRIPTION LENS GBINING MACHINE. APPLICATION FLHD JUNE 27, 190B.

@$59,845. f Patented N0v.9.19o9.

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AUTOMATIC PRESCRIPTION LENS GBINDING-MAGHINE. YAPPLIM'H'QN FILED mm: 27, 1908. 939,845. Patented Nov. 9, 1909.

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"W/2283895: hyear: /JAMM 2.78' 0. mam/fu E. o. MATTERN. AUTOMATIC PRESCRIPTION LENS GRINDING MACHINE.

' APPLIGATNNJPILED mui: 2v, 1908.

` Patented Nov. 9, 1909.

-1 being moved substantially over the same the operating FNLTED STATES ERNEST OTTO MATTERN, OF PORTLAND, OREGON.

AUTOMATIC PRESCRIPTION-LENS-@BINDING MACHINE.

Application lcd June el wwm if may concern:

Beil; known that l', ERNEST OTTO MAT- annrz, a citizen of the United Stateaand a resident of Portland, inthe county of Multnomah and State of Oregon, have invented a certain nen7 and useful Improvement in Automatic Prescription-Lens-Grinding Machines, oi which the following is a specifica-- tion, reference' being had to the accompanying drawings as constituting a part thereof.

My invention has for its object to obtain an automatic machine by which disks of glass may be accurately and rapidly ground into lenses, especially such lenses as have radii or cnrvatures of a more complex nature, such as prescription lenses. The diflicnlty heretofore experienced with the machines designed for this purpose was, the movement ot' the lenses over the lap or grinding giece was not adapted to accomplish rapi Work; t'ozgby reason of the lens path consecutively, the glass was frequently' defer-tively ground, the Wear on the grinding face ot' the lap Wasnneven, and the lap had soon to be discarded.

l accomplish my object by so arranging my mechanisms that the movement of the lens-over the lap or grinding surface isgconstantlyvaried, relatively to the grinding surface ot the lap. Furthermore, I have increased the lifeY of my machine by renderingparts practically emeryl proof that is to say, providing means for preventing the emery solution, used in grinding the lenses, from getting into the Working arts ot the machine, which, in the-machines 1eretotore in use, was a serious fault andshor'fcned thev life thereot'. incidentally my ma-` chine is so arranged that a number of lenses otdilerent radii may be ground simultaneously; and iny machine also embodies the specili'c features hereinafter more fully described.

. in the-drawings: Figure 1 is/a central, transverse7 vertical section of my machine complete, parts. however, being! shown in full; Fig. 2 is a vertical sectiorn taken approximately on linen-A of Filr. 1; Figs. and il are perspective details ot' lthe vibrating-head ot my machine; Fig. 5 is a p erspectiye detail of the standard on which such vibrating-head is mounted; Fig. 6 is. a .top view of the case inclesingthe vibrating-head; Figui' is a perspective detail of the vibrating-plate supporting the laps of,

Specification of Letters lPatent.

'proximately one-half inch Patented Nor. il, .tlt'l.

n, 1908. Serial No. csQ'A.

mymachine; Figs.' 8 and 9 'are respectively a side elevation and a top View of one of the buzzers to which the glass dislr to be converted into a lens is cemented; and Fig. 10 is a sectional detail illustrating a modlcation' in 'the means for securing the laps in place on the vibrating-oleic.

The main parteci my machine comprise a table, on which is mounted a vibrating lap-plate, and over the latter is a vibratinghead, in which are secured-the' stems of tl e buzzers, the latter being the pieces to Which the glass disks to be ground intolv lenses are cemented. The is given a straight line, reciprocating motion, of apthrow in each direction, at the rate et ltllvibraticns per minute. The is made to desem is a quarter of an inch at the rate of 300 cyclic motions per minute. n short the principle ot o eration of my mainly in this, tha." motion is transmitted to the lap-plate and the vibrating plate by independent devices, operated through the medium of speed ditterentiating caring er *of the vibrating head be a circle Whose diameter l device resides' in other words, I have avoided a relative cyclic .motion7 that is, the repetition of identical relative movements of the lens and the grinding tool within short periods of time. lt the face of the glass being converted into a lens in my machine he oh-v scrved, during the grinding process, will be seen that the resultant or relative movement of the lens and grinding tool upon each other-that is. the composite 'movement kwhich is'the product ci 'the lwoindepci lent movements of said parts- 8, with the axes thereof co cantly shifting, vertically and horizontally, over die who e tace of the lens. llic angles of intersection of the movements ot' said parte constantly cha nge, the lens and grinding tool sometimes traveling in the saine directiony :and sometimes in opposed directions; 1. result obtained being that the grinding and polishing processes are idly done.

Describing now the details of construction ot my machine: The supporting frame or "erin-es a rigore the Sinai erfectly and raptable, fr, may be-of any convenient constrncn u l l tion, and 1s preferably so arranged tnat the.'

same may be fastened to a door base e,

as shown. The table comprises a centrally apertnred top c, the legs of which are ccnnected by a member (l. Un the table togo is mounted a guide-plate e, said plate being secured in place by screws f, as shown in Fig. 2i. On the guide-plate e is secured an upright hollow cylindrical standard g, providing the upper-end bearing for the vertical shaft L, the loWer end of which has its bearing injav box a on the member (Z. To provide for the rigid fastening` of the standard g, the same is made with an integral flange z', through which are inserted screws j. rl`lie upper end of thc standard g is provided with a Wide integral flange-head la, constituting a support for the vibratinghead, in which the stems fm, of the buzzers n are movably secured. The buzzer n, as mentioned, being the piece to which the disk of glass to be ground into a lens-is cemented..

The connection between the buzzer and its stem is in the nature of an articulation, 0, soas to allow the buzzer and grinding glass to follow freely the radii of the grinding face of the lap 7?, which, is essential to obtain a perfect lens. The laps, as shown, are removably secured on the vibrating-plate q, either by means of pins l; or, as shown in Fig. 10, instead of pins and sockets, the channels q may be made with circularl apertures, the laps p made with stud-pins 772, and the laps fixed4 in place by set-screws 23, provided with hand-wheels 24. The center of the vibrating-plate (1 is cut away to provide working space. ln order to adapt my machine to simultaneously grind a number of lenses, the same is made ot' such proportions that a series of the laps j may be secured in the channels q of the vibratingplate g. To carry ofi' waste enierysolnti n1, I provide channel-grooves (f1, and to prevent the emery-solution slopping over the ends of the vibratingplatc q during its vibration I provide projecting flanges g, along the sides of the channels y'.

Rigid ou the, shaft /L is a gear r, meshing With a loose duplex reducing gear s, journaled in place by a screw-pin t; and thegear e meshes with a loose gear a (compare Figs. l and 2) also arranged to reduce the speed transmitted by the gear s. The gear u is provided With an integral eccentric hub n', to which is. connected one end of the pitnian v, the opposite end of whichl is connected by a pin, w, with the under side of the vibrating lap-plate y; said pin 'w being inserted in a boss g4 and secured in place by a` set-screw On the upper end of the shaft /i is rigidly 'secured an eccentric disk y, which operates the vibratingshead of my machine.

The vibrating-head, holding the stems of the buzzer-s, is mounted on the rflan,f ;ehead 7c of the standard g. comprises atop piece or cap .a also detail Fig. 3) made with a peripheral square flange-head e', having downwardly extending rim-flanges e2 on two sides and a central The vibrating head l downwardly extending cylindrical piece z3- fitting over the eccentric disk y. The cap a rests on the ilange-head /c of the standard g. In the space intermediate the flange-head 7c' of the standard g and the flange-head e of the cap e is a centrally apertured square plate 3, made with flanges 3a on two sides (see also detail Fig. 4) whereby'this plate is reciprocably held in place on the flange-head of the standard g. The flanges e2 of the top piece e hold the cap-piece reciprocably in place'on'said apertured plate 3, and thus they cap-piece e and the plate 3 are arranged to be reciprocated. at right angles to each other by the revolving .of the eccentric y. lnclosing all the parts of the vibrating-head is a case 4t, having an apertured top which is seated on the peripheral flange e of the `cap 2..' and under the flange-head 71: of the standard g there is fastened to the perpendicular walls of the case, Il, a bottom piece (i, secured in place by screws T; said bottom piece holding the case 4 against vertical displacement and incidentally holding the operating parts of the vibratinghead together. The case 1i is also secured 1n place on the peripheral flange e of the cap z by screws 5 inserted in screw holes 5a. The described arrangement ot' the parts of the vibratinghead is designed to allow the latter to be operated by, and `to follow the rectilinear motion incidental to the revolution of the eccentric disk y. The vibrating-head, as apparent, travels in a circular path.

Along the two sides of the case ,4, parallel to channels q of the vibrating lap-plate g, are provided a series of sockets 8 (see F ig. in which to receive the stems m of the buzzers ln.; see detail Fig. 6. The sockets are made with vertical key-ways 9, and the stems with ribs m', so that the stems mmay be secured against rotation and confined to a vertical movement in their sockets while the glass being y ground is following the curves or radii of the lap. Then any one of the buzzer-stems m is not to be used, the same lnay be lifted and so arranged as to be held uplifted by the rib m.

rlhe sha ft la. has rigidly mounted thereon a speed-wheel or pulley l0, and the operating parts are supplied with lubricant introduced through Aan oil cup 2. To confine the vibrations ot the lapplate to a straight line,'

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ivi- ih tnoerences 16, 16% For 'eine Seme purpose the reciprocating rplate g is' inadeet its rim wit en overhengmg ange l?, 17a. See deta Fiv 7.

As own in the detail Fig. 8, the buzzer n eeninrisee a disk er head provided Wih a een'mi socket 18, ep'en at he top end having vertical slots, 18a, et opposite sides` to receive the gobulenhead 19 and ransverse ber20 on the bottomend of the stern m. The lap ami buzzer shown are the ltype for grind.- ing deubie conceved lenses. For other ypes of lenses of course corresponding ypes of buzzer and iap-piae Wili be used. An vefficient pressure of ihe buzzer upon the grinding iep-fece ie obained by means of a Weigh- 2; e six-pound weight being genor this purpose by ine. The admiiege' of a weight over a spring is, 'he ferme-a: mesures en eren press-.ure of he lens upon iie grinding face of The hip, wiiiie e spi neud kmore er les. very iis pressure he riee end fell of the buzzer While iii-e is: eiowing ihe ci-rves of the Lip. Te, guard ngeineb the Weight being hrewn up and elling beek npen die siem Wih a bien' sedi force es 'co have e tendency ie eimter iie iene being ground, I Sent the n' iffh upon n eei-sprin y machine is se a"ranged het eight iene-es of different radii may be ground et Duxi ' the seme time, and substantially' eutometicniy; :for eil the etenien required, after the g'ese disks have been arranged, is to apply 4he eniery-soinzion on the grinning fece ei' iie iep. The machine is then stered and eiion'ed to grind for e given iinie, approximeeiy ien minutes, after which the iene fece is ready for poiisiiing, which is zieeompiiehed by :y machine in the seme manner as ine iding, tien one or' L rieis.

ie weil knewn poiishingVinnie-l 1 verf,7 coin- 'i ized mziell'ne requiring but e epee wentyour inch-s square, and eneufh edaiionei ro :fn en eef-fh side for the i is :iso eri'nngeri se 4 Cep bythe uneveifiebie weer in e proonged Ination 0f e frame,

veiprecfxble in l@ l( have iiinsvreed e modifiez"-A combination of e frame, a gnide-bese, a Iepplete mounted thereon, a vibratinghead -mounted above the hippie, e buzzer secured depencen in said vibretin heed,- operating means ineudinff e speed iijferentiaeing element, and inc ependent conne@ tiene'airenged "so impart a. reetiiinear movenient to one and ther of seid iep-plete and vibretingheed.

2. n e iens-grinding ineeliine, the combi a Uuidefbase, e 1app1ete mounted thereon, e v1 rating-heed mounted 'above the lap-plete, e buzzer end means including e universai joint noding such buzzer dependent in said vibrating-heid, operating means incnding e speed difereniming elm ment, sind independent connections zu'rengec to imperi; fi reciprocating movement to the iapnlete and e cireuiar movement to he vibrating-head.

machine o 'ne character described comprising' e aoie, e guide-plate on. the table, e iep-plete mounted ihereon and reeiproeenie in n sraight iine, e heliow standarci mounted on the tebe, a quadrieterei sienderd, :in eceenrie fislf rigid en 'the 'upper end ef me Hin', a vibieing-i'ieed menuied on seid Hnge-heed ef file standard and seid eeeenric disk, eeic vibrziiing-nead comprieing e eenti'eiiy zipertured plete elidebiy en the ienge-heed ef iie stendere?, ineens restraining seid plete te e straight line' reeipreee ion. :L cap inciosing said ee- "oisn, means resi'reining 'ie cap te e unv n, Cese ineiesing seid movable he ou erkend, meme for removiihlv securing u 'vriezer te he vibraing-hend, und ineens itierek Seid ep-pie-e en Seid buzzer are opezieff simuieneensy but et nneque'i Speed.

A, meen ine ef iie chnreeter described comprising a table, e guideplee on he table, u, inppiete mounted hereon enf?L rei ernigii line, e hoiio'w saub ard nmnnied en ine table, e qnadriiateral Hngeen@ rigid en Sgne upper en-i of the mnr'inrfyzz Yer'ice'i Shaft. jeurneied in Said rie-rd, en eecenre .f`1` rigid on the upen of mit, u. vmratingiee'd mountper y A l eci en seid, linnen-heee 035 the standard and mi@ eieenrie di: prisme; a Centrally ep reiingheed cemriured plaieA siiciablv the standard,

Ineens resreining eine niet@ te e sieigii'b i reeini tien, e efr' nielesing said eei x cenirie dis i'eeiproee i. n i right angles to e .d e ense ineiesing said movable a 11ineinrgiieei. a .Jeri-es of veres of the case, stems e in 'eid sockets, means reegeinst rotation, means res-.raining the cap io u.- v

t it

ev circuler movement to the for jointedly connecting a buzzer to the lower end of the stem, and means whereby said lap-plate and said buzzer are operated simultaneously but at unequal speed.

5. A machine of thecharacter described comprisingl a table, a guide-plate on the table, a lap-plate mounted thereon and .reciprocable in a straight line, a hollow standard mounted on the table,.a quadrilateral Harige-head rigid on the upper end of the standard, a vertical shaft journaled in said standard, an eccentric disk rigid on the upper end of' the shaft, a vibrating-head niounted on said tlange-head ot' the standard and said eccentric disk, said vibrating-head comprising a centrally apertured plate slidably seated on the flange-head of the standard, means restraining said plate to a straight line reciprocation, a cap inclosing said eccentric disk, means restraining the cap to a. straight line reci procation at right angles to said plate, and a case inclosing said movable parts ot the vibrating-head, ay series ot vertical sockets on the sides of the case, stems vertically movable in said sockets, means restraining said stems against rotation, means 'for jointedly connecting a buzzerto the lower end of the stem, a lweight on said stein, and means whereby said lap-plate and said buzzer are operated simultaneously but at unequal speed.

(i. A machine ot the character described comprising' a table, a guide-plate on the table, a lap-plate mounted thereon and reciprocable in a straight line, al hollow standard mounted on the table, a quadrilateral flange-head rigid on the upper end of the standard, a vertical shaft journaled in said standard, an eccentric disk rigid on the upper end ot the shaft, a vibrating-head mounted on said flangefhead of the standard and said eccentric disk, said \filirati1'1ghead comprisingl a centrally apertured plate. slid ably seated on the flange-head of the standard, means restraining said plate Lo a straight line recipromition, a. cap inclosing said eccentric disk, means restrainingtl'le cap to a straight line reciprocation atl right angles to said plate, and a case inclosing said movable parts ot the vibrating-head@ series of vertical sockets on the sides of the case, stems vertically movable in said sockets, n'ieans restraining` said stems against rotation, means for jointedly connectinga buzzer to the lower end ot the stem, a springseated weight on said stein, and means whereby said lap-plate and said buzzer are -operated simultaneously but at unequal l speed. l

7. A machine of the character described comprising a table, a guide-plate on the table, a lap-plate mounted thereon and reciprocable in a straight line, a hollow standard mounted on the table, a quadrilateral flange-head rigid on the upper end of ythe standard, a vertical shaft journaled in said standard, an eccentric disk rigid on the/upper end of the shaft, a vibratingehead mounted on said flange-head of the standard and said eccentric disk, said vibrating-head comprising a centrally apertured plate slidably seated on the {iange-head of the standard, means restraining said plate to a straight line reciprocation, a cap inclosing said eccentric disk, means restraining the cap to a straight line reciprocation at right angles to said plate, and a case inclosing said movable parts of the vibrating-head, a series ot' vertical sockets on the sides of the case, stems vertically movable in said sockets, means restraining said stems against-rotation, means for jointedly connecting a huzzer to the, lower end of the stem, a springseated weight on said stem, means whereby said lap-plate and said buzzer are operated simnltaiuously but at unequal speed, and means arranged to prevent the emery solution working iuto the operating parts.

8. A machine of the character described comprising a table, a guide-plate on the table, a lap-plate mounted thereon and reciprocable in a straight line, a hollow standard mounted on the table, a quadrilateral flange-head rigid on the upper end of the standard, a vertical shaft journaled in said standard, an eccentric disk rigid on the upper end of the shaft, a vibrating-head mounted on said flange-head oit the standard and said eccentric disk, said vibrating-head comprising a centrally apertured plate slidably seated on the flange-head ot' the standard, means restraining said plate to a straight line reciprocation, a cap inclesing said eccentric disk, means restraining the cap to a straight line reciprocation at right. angles to said plate, and a case inclosing said movable parts ot' the vibrating-head, a series of vertical sockets on the sides of the case, stems` vertically movable in said sockets, meansl restraining said stems against rotation, a spring-seated weight on said stem. means whereby said lap-plate and said buz- '/,er are operated simultaneously but atunequal speed, protuberam-.es on the opposite bearing faces ot the guide-base and the lapplate, tianges inclosing the surface of the lap-plate, to which the lap is secured, and overhanging flanges on the tour sides of the lap-plate.

EllNllS'l OTTO lll llltN Vitnesses S. H. HAINES, L. H. CAMPBELL.

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