US2603917A

US2603917A - Platen roller support

Info

Publication number: US2603917A
Application number: US123430A
Authority: US
Inventors: Merle F Myers
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-10-25
Filing date: 1949-10-25
Publication date: 1952-07-22
Anticipated expiration: 1969-07-22

Description

@222, 1952 M. F. MYERS "2,503,917 I PLATEN ROLLER SUPPORT Filed 001:. 25, 1949 2 SHEETSSHEET 1 :EIE-a .1

, I INVENTOR. MAWM' f7 MKFRS 4 frale/w'rs July 22, 1952 F. MYERS PLATEN ROLLER SUPPORT 2 SHEETS-SHEET 2 "Filed Oct. 25. 1949 INVENTOR.

Mau 1. 441 525 Patented July 22, 1952 PLATENROLLEB asUlP Qli' i Merl t y etmit ll ch-i.

- Application October 25, 1 9.49,.'Serial No..;123A30g.. l 8Glaims. ci.i s, i+is.5)]

' This inventionrelatesito devices rorsupporting and guiding workrelative-toran abrasive belt; on a grinding machine or the "like and particularly to an attachment for such machines for stabilizing i "the belt and the work as th grinding. operation I proceeds. This application forms a continuation- 'in-part'of aco-pending application for U. S. patent,-SeriaI No. 109,201; filed August '8, 1949, now

"-abandoned;' and entitled"P1aten Roller Support. i

An important object-of the invention is to'pr0- 1.

vide a device for" use with conventional grinding machines employing an endless belt as a polishing or grinding element which serves in a novel'manner to -guidingly support the work in its movemen-trelative to the belt'and which is designed in a novel manner-for backing up and stabilizing the belt dur-ing' the interval of time in which the work -is in Contact therewith. Another impo'rtantobfleet of the invention is to provide an improved attachment fora grinding machine and the' like.

which may be readily attached to such machines and'function to support work as'the edges thereofare ground or beveled'to a desired amount. A further important object of the invention is'to "provide an attachment' of this character which-is composed of few parts designed for inexpensive manufacture and which'is durable and functions expeditiously for the purposes intended. v

In carrying out th objects. of the invention the -a'.ttacl iment adapted to ,be'conveniently secured'to a fixed member of agrin'ding machine having an endlessverticallytravelihg belt and to be supported thereby with one part-disposed in-juxta- "position to the rearface of the belt and anothen part-disposed across the front face "of'the belt to receive and support the work'thereo'n. The part of the device-which is disposed adjacent to -the rear 'face'of the belt is composed of two members ispaced'longitudinallyapart with respect 'to the: "belt and arranged so that two-spaced areas of the belti-are'v engageable "therewith :during the grindingzoperation. .The-iorward part of the device extends acrosszthe' front face of the belt on a level betweem' the belt engaging members. onithe reargr rside-ithereof and: is provided; in aanoveli. manner with onez oriumore freely. movable elements" which support the :work. 'andsgui'de the .work. .for .move- :ment tIELIlSVBI'SGIYItO the 'directionof movement of the belt. Such last means preferably comprises a; plurality :of rollers arranged in: "a row. and. independently rotatable about parallel axes extending perpendicular to the plane of thebelt/ Ther'olli ers: function tozsupportilthe work, such iasiaislieet ofxglass, :andipermit -th'e work 'tdbemo'ved'toand;

* cnsasem q, s th invention isthemrovisionof a .demountable the ace e, at w il 3 5 t. therewith. A novel feature; bf

connection -forconveniently detaching-'theioller w m es, v ims d I wherein;

supporting part -of the ,devide r 8 9 s rie r o of he ntent w ll be o e the' b tand a ter ivep 2 i ms 10f wor the device in order'that-the fro'nt face-'oft11 elt may be cleap of anyobstruction whenso. desired. Var u o e biec s.adva tas sandm -i .WQF f lyr p re iro h.: b Q a i a Q Qm any n d aw n e- -r spartqa n view or one mb ds thetinvent on: and sh ine he m s cu xe ,member. fa g n insmachineyiram Fig. 2 is a front elevation ofthe devic g -1,

Fig. 3.isa;s ide;elevation of thedevice-s w g vted.ci t in s. Y Y a 5 Fi .4 .is-ra ira menta-ry' s d e eva iQn-Q apa JQ f b dev i lu tra in partiqularl he-manne ywh ch th rea 5 112129 ne-t ims nn ctestt t e t Qfhea taqhment a 5 sxam t s atiqna a mQdifiea i the invention,

' Fi i t ap an-w e kqi'the attachmslitiof Y Fig v hQw n fihe m sewed it 'rtub il frame; b

device is preferably in theform of-a removable y outline; V

1 8isa.fragmenta yrir ntielevaticnrshowins a-mqd' t onofethe workesupnor i-nasele Fi s-5r and 6 showin the sriniiinsrbchin-dotted 1532'. vertical.- s ctionalflviewtaken-along line 9-9 of Fig. 8.

Ref r n t th d win s wherein :like nnmerals ,qdesig-nate similar parts throughout a vari- 11s iviews, .:a fixed part 10f awerind s machine framaiwflhasa tubular-member, is:indi'ca.ted--'at I10. qSlijdably supported. on the tubular member l 0 isa-s1eeveoncol1ar lgz which:iseprovidedzwithaset the member t0...

.1. S silt-1&5; agndcalgclmnectingeiwebportion iliBfil-iS :secured to the :cOllar 11 2 'as :by-wel'ding: 20f Pref- :screw' I'liefornadjustably positioningth'e collar on 'A Ueshaped member ha ng aibly', however. tithe middlet portiom of- 'rthe-i-Web l;8-;is, zfsecuredfbyn weldingsto: the outside "of" the llar. i2 rte-that theiplanexofrtheweb18* extends 50 :parailjelitothe axis'xof the :co11 a1'- a mshown in Fig. secured tot-he router extremity ofteach leg ttygas byWel,ding. 22,:-is a belt engagingmemj benoryshoe plateizflito thezoutensurtace'ot which isifiepliledsasuitable'lining 2 5.: TheIliningsZB 'm@y:be:SeQured:-to the-shoe platesibyzcopper rivet's approximately mid-way between-two and lower marginal edges of the shoe plates 24 and linings 26 are bent rearwardly as at 30 for the purpose to be later set forth.

A supporting member or bracket 32 is secured to the web portion l8 by a suitable fastening element such as the bolt 34. Preferably the bracket 32 is connected to the'web portion 18 below its point of connection tothe collar I2 as'shown in Fig. 3.1 Anai-m 36 is-removablyconnected to the supporting bracket 32 in the manner hereinafter described. The arm 36 as shown in Fig. 1 1s' bent at right angles intermediate its ends so as 28 in the manner indicated in Fig. 3. The upper to project a part thereof parallel to the plane of 11 the two shoe plates 24-24 but in forwardly ofiset relation'thereto. The arm 36 is provided with a plurality of laterally extending pins 36which are disposed in a horizontal row and in spaced pare. allel relationship. Each pin carries a" corre spondingly shaped roller 46 which is preferably "formed-oi deformablefmaterial such as rubber 1 and which is removably retained on'the pin bya washer; 4'2 and a cotter-pin '-46'.' Therollers 4e yare off the -sarne size and in assembled position 7,

thy-Texte'nd in ahorizontalrow." 'The arm is provided with an upwardly' opening notch 46 *jforapurp ose to be set forth hereinafter.

*" The roller supporting arm 36 is detachably "mounted on the bracket 32 and for this purpose, as ishown' in -Figs. 3 and 4 the arm is' provided wanders and 50 which are preferably'mutu- I ally perpendicular and adjacent to the edges of the arm'36. The supporting bracket 32 is provided with projecting

headed elements

52 and 54 which'areslidingly received in the'slots 4B and 50" respectively. The arm 36l*is cut away as at 56 adjacent to the slot 48 to permit the arm to be readilymoved from the position shown in Fig. 4

to the position shown in Fig. 3 with the-headed portions of the elements extendingthrou'gh the 'slotsand engaging the side of the arm 36'. This mode of adjustment enables the arm 36 to be quickly removed and installed-and at the-same time provides a rigid support therefor.

In mounted relationship to the grinding beltj' such as indicatedin dotted' outline" at 56, it will "be 's'eenthat the linings zfi on'the'shoe plates 24 are disposed'opposite to the rear face'of the belt whilethe" rollers 40 aredisposed ina horizontal 1 row across the front face of the belt and in slight forward spaced relationship thereto. It will also be noted that the arm 36 supports the rollers in "such a mannerthat theupper' peripheral portions thereof are disposed in a horizontal level shoe plates 2424. g 1 .:wor1 being ground, polished, or'otherwise acted" upon by the belt '58- is restedupo'nthe rollers an'd'pressed against the abrasive side of "the belt. i As shown in Fig. 3. work indicated in jdott'edtoutlineat issupporte'd uponith'eupper :peripheral .portions 'o'fth'e rollers and pressed flush againstthe'xbelt; -The. workmay be supp'orteldby the rollers horizontally as indicated in :ohe dotted'position; or if desired, it maybe tilted --.s.ojas toIibe received in'the notch .46, as shown in "the-other dotted position; :When the member 60 is tilted into the notch 46, the'edg'es of the work {may-"be beveledtoany desired amount limited to the extent .of the configuration of the notch. It isto'lbe noted that the work 60 when pressed into engagement with the belt 58 is disposed on a level 'b'etween'the two shoe plates 24--24. Pressure er [the work against theibeltwill causethe belt to gshiftagainst the shoes. for support and-that porduring 4 tion of the belt between the shoes will yield and bow slightly rearwardly. The relative spacing of the shoes with respect to the roller support enables the work to be pressed against the belt with a certain cushioning efiect. This is important as it prevents possible breakage of the work in engagement with the belt 58, a highly important feature in the grinding of edges of frangible material such as sheet glass,

Preferably, the shosifz z g andtheir respective linings 26 are slightly spaced from the rear spaces of the belt 58 when the work 66 is not pressed against the belt to prevent undue lining wear; The upper and lower margins of the shoe plates and the linings are turned rearwardly as at3n to prevent the belt from striking any sharp edgesof the linings or the shoes when the work is pressed against the belt. It is understood that the grinding operation the flexibility of the belt will cause the belt to be backed up or supportedxby the lin'ings:26, but: when the work is removed from'engagement with the belt, the latter assumes, its normaliverticalposition spaced from the linings; 1 1

The rivets 28 are preferably copper .zsoiaito prevent damage to thebelt in the event the linings 26 become "worn, and the rollers .40 are preferably rubber so as to prevent; breakagejof fragile material such as glass when they are being ground or polished by the belt 58.

Figs. 5 to 7 illustrate'a modification of the invention embodying in general the features of the first disclosure but designed for economical manufacture and use. a The device oiFigs.-5 to 7 is supported'upon a fixed part of a grinding machine frame such as the tubular member 62 similar, tothe member ID previously described. Slidably received over one end ofthe tubular member 62 is a sleeve or collar 64. The collar is joined integrally at its outer end to a bracket plate 66 shaped in the form of'a Y and having two divergingly extending legs 68-68. The collar 64 and the plate 66 including the legs 68-458 correspond respectively to the collar I2, plate 18, and legs |6l6 previously described. The collar is removably held on the tubular member 62-by meansofasetscrew 10.x

In mountedrelationship to the vertical traveling grinding or abrasive belt, indicated indotted lines at 12 in Fig. '7, the two legs 68-68 are disposed in vertical spaced relation to one another and adjacent to one edge'of the back face of the grinding belt Each leg-68 carries a horizontally extending cylindrically shaped member or rod 14. The rods 14- -14 extend horizontally in vertically spaced parallel relationship to one another and transversely to the direction of travel of the belt. The rods 'M-'M are adapted to engage the rear face of the grinding belt 12 and function in a similar manner as the shoe plates 2424 previously described to stabilize. the belt as the .work is pressed thereagainst. As shown particularly in Fig. .6, each rod 14 is secured to its respective leg 68 by means of a screw member 16 which when tightly threaded rigidly secures the'rodto the leg. However, .at periodical intervals, the screws 16 may be loosened to permit the rods M to be adjusted angularly about their respective axes to bring new peripheral portions thereof into engagement with the grinding belt.

Secured to the bottom leg 68 of the plate 66 is a supporting member or arm 18 which is generally similar to the arm 36 previously described. The armis bent intermediate its ends'toform an L-shaped configuration so as to dispose a forward ":portion: Mathereofc horizontally acrosslthecgrind- :ingzbeltrliaandin slight: iorwandgspacedrelationishipwthereto. The 'forwardoportion: 3 9 tithe :bracket isrjzprovided :with'?a pluralityt ofilaterally iextendingipinsc-azawhichiproject:forwardly; from; thezdevicerin spaced. parallel xelationshi-p andvin Y ashorizontall'row. Each -pi-n 82 carriesva :eorrej ;sponding1y-:shaped-. IOHGI'wB- WrhiGhT is preferably 5 formed ofrdeformab'le er: resilient :material such asrrubber; Therollers-fend:thepins fizscorreezlo -rl-.wi'A=l-d'evicelfor :use: on agrindineorypolishing -..-spond.respeotively to-the rollers-A t" and' the, zpins 5: 38 efathe previously described embodiment ef the :;-i-nven-tion. The :rollers are retainedz-sonthe mespeetives pins by :meansvofcotterzw pins;- 865- i The roller supporti-ng arm- 18; includingei-ts'iore 1 ward: portion 80 f .is sdetachably mounted; .on ithe --.bracket plate Silina mannerrsimilareto that preuSly described. The rearl-wardly extending, part rthe arm is. provided -with: slotswhich ope/neopmachinehaving: a substantially vertically travelting grin'ding belt :-comprising,:in combination; a

wU-shaped frame member havingthe: legs thereof szarranged' in-verticallyispaced. apart relation,- flat ifaced shoes carriedion the outer'extremitiessof the 1egs-of.:said frame. member andwaidapted'to slidably enga e two vertically spaoedaapart areas .:of one side ;of the vertically, traveling-s grinding "belt; a i fiseoonduU-shaped: frame member: having- ;the; legs 7 -.:;l#$itfl o er ii u flpp r fl SEQ-thereof. arranged horizontallyspaced; apart rewedges thereof. \The supporting,braeketplatatfl is provided Wi-thtwq projecting,headed-elements88 -Fand rQOY-Which .aresslidinglyrireceived in theyslots I o n; manner wpreviouslysdescribedin connection ;with the element s-52 .and :54. The headed elee j .Imentsn88 and Slhare offset vertically and. horieiontallyio one :anotherso-Mthat when-the arm; is ,supDQr-tedthereby it "is rigidly held= in place lagaihstdownward movement- Howevemthe arm .xna'y;b e' swung upwardly. andouickly freed from 13:30 l .I'theg elements Ion-quick detachment therefrom.

v .JIhe work vto-be ,,g ro1.mcl polished cit-otherwise .-acted upon byfthe .belt.is-lsupportedlion therollers .l84 i-nlthe manner previouslyldescribed. Sohsup- 1 lation,:,rmeans yconnecting one-of the "legs -;of fthe second frame; member .to ram: intermediatezportion ofv the'ifirst framemember and disposing the-other 18;; thereof: between" and in oif'settparallelt relation Z :tostherplane of the shoes and:onithe opposite side of :thegrincling "belt'from 'said shoes; and arrowxof resiliently efaced: rollers :mounted ion said'xlast -:mentioned leg-l rotatable; abouthorizontal. axes-ex- :tending perpendicular to the planezofthea grinding belt and 1 forming a Test 'upon'which' work: to" :be ;.ground.by thei'beltiis sidew'ise'movably supported.

"2. Anzattachment for rgrindingr machines hair I ing a traveling abrasivelsbelt:comprising, winl'combination, a frame, means .ZCBIITIiBdI on'ttheiframe sp r i he worknis brought. into. engageme i for'contaoting oneizside of' the ltravelinglbelt, a

thatsportion of. the ,belt traveling between the .two

- mas i l-H.-

Whenthe WOI-k is; pressed: against Y I, the -belt 12,.hthe1.latternisl'fiexed rearwardly; into I engagement with, thelrods and .stabilizedthereby.

"fiygyirtne of I the cylindrical l formation, the-rods o pres'ent a relatively smalllsurface .areaioncontact withfthebelti ZThis. ,arran'gement.,.reduces(the ,wear on theobelt'. Thero'dslare preferably, formed T of metal and. woasehardenedilto improve (their Q wearing, characteristics, but ,as' Wear. occurs, the Lrdds mayL-be individually .turned omtheirrespecglove axeslby loosening the screws'l'l'fi. to present new '-1suea e areas forcontact withtheLbelt. s p fl'ififi'gsfS 'an'd' 9 illu'strate a. modificationnf the in- Yention wherein the work; is supported .upon ,an endless band carriedby rotatingumembersr gen- 'erally similarf tol'the rollers 40 and t llpreiious- 11y, described. 'Referring' to Riga-8 andf9,..an .arm seetion corresponding to the. roller; supporting part"80;previously 'describedisindicatedsat 92. v 'Carriedibythe arm secti'oni92 area pluralityof "rollers'in'theform of sheave wheels-I94.,-which vmay beformed of. metal or any suitableirigifdma- "terial other than rubber, Csince "themare 'not brought intodirect contact with the work kLooped around the r'o'llersiis anendlessgnidingmember vL1;

r or fineness whi'cnlis. formed: or fyieldable oi; .deformable materialsuch as rubber. l Toensure se- .curementofi the hand as to the" rollers 54 the lat- :plurality-wof tsirnilarly rshapedrrollers, J means mounting? therrdllers in za'ir'ow tron the" frame; for rotation" about :para'llel axes andfidisposingtsthe row sof: rollers ton :the'zside 'of thezflbelt. opposite'to isaidlbelt contaetingimeans, and afiexib'lezend-less iband ipassing' aroundrisaid 'rollers sandv. forming a :rest-iupon which" work may be zsidewise movably -supported while pressed. intosengagement with the adjacentsideof the'traveling belt. z 3. "In-ta :devi'ce: for 'grinding and polishing the edges of glass. andwsimilar." sheet-likeiarticlesi' and including asubstantiallyverticallyimovable abra- :siveen'dless belt; a supporting barrextendihghorizzontally across onesidelof the beltand in spaced lrelation :thereto',"ta;- collar slidablyisand adjustably received on v said than a substantially U -shaped support i secured to the eollar and arranged so r that thei two legs of its U"-Ishap'edl "formation are disposed in-"'vertieally fspacedi apart relationship 55 hand project from? the" collar: toward 'thexb'elt; b'elt "engaging members latta'che'd'tothe' outerextremiitleSDfi said legs for engaging longitudinally sepa- :ratedaareas or said side o'f the belt,='anarm con- .-.=nected*to said U-shaped supp'ortandi'having a 0 part extending substantially horizontally acr'oss h :sicleor the rbeltbpposite tosaid-bar and 'on a :levelsbetween said'beltiengaging members, and a aherizontal rowi of' 'similarly'f'ormed rollers carried I by said -partvof'the arm and being independently ,terg maylbe provided with peripheralgroovesr98las,, journaledithereo'n about parallelaxes-extending shown in Fig; 9' forreeeiving an internal ribbed l portion I U D .ofthe band.

In. all-three embodiments. of theinventiom the work supporting means whether the rollers 40 or i shiftedto and froacross the-abrasive face of the .-'.gIfi-ndin'g .belt. 1 This. is ,particu-larly: desirable for grindingV-theedges ofiglass sheets and the li'ke and enables :the workman. to-"holda glass sheetweither .agagernent Iwith the: abrasive belt and for movejil l ontheendless band r96,Ienablesthe work.-,to..be 7o-ement of theiglasssheet-transversely-to-tliewlongiv Lhorizontally;or at .-the desired:anglespressing' the, 176 .i'snbstantially vertically? traveling abrasive' belt; a

horizontally extending supporting bar positioned in paraller's'pacedapart relationship to the rear side ofth'e-b'elt, a collar adjustably slidably fittin'g saidbar, means for releasably holding said collar on said bar in adjusted'position, -'a pair of legs secured'to the collar and extending toward -said beltin' vertically spaced-apart relation, a

belt engaging member carried on the outer extremity of each of said legs'for engaging vertically separated areas of said side of the travel ing-belt, a right angularly formed arm, means for releasably connecting one end portion of said arm 'to-the lower leg of said pair of legs and such that" the other'endportion of the arm extends "transversely across the front side of the belt'on a "level between the two belt engaging members, a

plurality of similarly shaped rollers each having the peripheral portion thereof formed of resilient "material, a journal mounting 'for each of said rollers for providing independent rotation there ripheral portions of saidr'ollers being arranged to project above'the end portion of the arm upon which they are mounted and'cooperating together to form a rest upon which a sheet of glass and the 'likemay be supported for edge engagement with the abrasive belt and for movement transversely to the longitudinal dimension of the belt while so engaged therewith.

v 5. In a device for grinding and polishing the "edges of sheetsof glass and similar sheet-like articles and including a substantially vertically movable abrasive belt having a front side and a rear side, a supporting frame mounted on the device opposite to the rear side of the belt and including a pair of legs extending toward the rear side of the belt in vertically spaced apart relation to one another, belt engaging members car- ,bers,-a plurality of similarly shaped rollers,a journal mounting for each of said rollers for providing independent rotation thereof, means securing said journal mountings to the end section of the arm extending across the front side of the belt and-disposing the rollers in a horizontal row with their-axes extending parallel to one another and substantially perpendicular to the plane of the abrasive belt, said rollers cooperating together to form a rest upon which a sheet of glass may be supported for edge engagement with the, front side of the belt and for movement of the glass sheet transversely to the longitudinal dimension of the belt while so engaged therewith.

6; A device for grinding and polishing the edges of sheets of glass and similar sheet-like-articles and including a substantially vertically movable V abrasive belt having a front side and a rear side,

a supporting frame mounted on the device opposite to the rear side of the belt and including a pair of legs extending toward the rear side of the belt in vertically spaced apart relation to one another, belt engaging members carried on the outer extremities of saidlegs for engaging verti-s cally separated areas of the rear side of'the belt,

a right angularly formed arm, means for releasably connecting one end section of said arm to said supporting frame and such that the other end section of the arm extends transversely across the front side of the belt and on a level between the two belt engagingmembers, a plurality 'of' similarly 'shaped rollers, a journal mounting for-each of said rollers for providing independent rotation thereof, 1 means securing said journal mountingsto the end-section ofthe sheet transversely to thelongitudinal dimension of the belt while so engaged therewith i arm extending-across the front side of the belt and disposing the rollers in a horizontalirowwith their axes extending parallel to one anotherand substantiallyperpendicular to the plane 0f the abrasive belt, and a flexible endless band passing around said rollers and forming a rest u'pon which a sheet of glass may be supported for edge engagement with the front side of theabrasive belt and' providing sidewise movement of the glass 7.'I'n a devicefoi" grinding and polishing the edges of sheets of 'glass'and the like and including a substantially vertically traveling abrasive belt, an' arm, a plurality of similarly i shaped rollers each having the peripheral portion thereof composed of resilient materiaha journalmounting 1 for each ofsaid rollers, means securing saidjour- 'nal mountings to the arm and disposing the rollers in a row thereon with their respectiveaxes extending parallel to one another, said journal mountings furtherdisposing the rollers so that peripheral portions thereof project equal distances" beyond one edge of the arm, and means carried by the arm and attaching the same to a supporting part of the device so that the rollers aredisposed in a horizontal row extending transversely across one side of the abrasive 'belt'and with the projecting peripheral portions of the rollers disposed above thev arm, said rollers c0- operating together to forma cushioned rest upon which'asheet of glass and the like may be supported for edging engagement with the belt and "for movement transversely to the longitudinal having a front side and a rear side,,a supporting frame mounted on the device opposite to therear side of the belt and including a pair of legs extending toward the rear'side of ,the'belt' in vertically spaced apart relationship to one another, a cylindrically shaped belt engaging member of wear-resistant metallic material carried on the outer extremity of each of said legs and arranged with their axes extending horizontally and parallelto the plane of the belt in order to bring cylindrical surface portions of the members into engagementwith vertically separated areas of the rear side of the belt, a right angularly formed arm, means connecting one end section of the arm plurality of similarly formed rollers carried by the end section of the arm extending across the front side of the belt and arranged in 'a horizontal row with their respective axes extending parallel to one another and substantially perpendicular to the plane of the abrasive belt, said rollerscooperating together to form a rest "upon'which a sheet of glass maybe sidewise movably supported 9 while pressed into engagement with the front side of the abrasive belt, and means providing rotational adjustment of each of said cylindrically shaped members about their respective axes to bring different surface portions thereof into engagement with the rear side of the belt.

MERLE F. MYERS.

REFERENCES CITED The following references are of record in the 10 file of this patent:

UNITED STATES PATENTS Number Name Date 969,183 Nash Sept. 6, 1910 975,088 Thompson Nov. 8, 1910 980,052 Blevney et a1. Dec. 27, 1910 1,034,959 Bertram Aug. 6, 1912 Number 15 Number