US990917A

US990917A - Ribbon mechanism.

Info

Publication number: US990917A
Application number: US57452310A
Authority: US
Inventors: Charles Spiro
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-07-29
Filing date: 1910-07-29
Publication date: 1911-05-02
Anticipated expiration: 1928-05-02

Description

O. SPIRO.

RIBBON MECHANISM.

APPLIOATION FILED JULY 29, 1910.

Patented m 2, 1911.

5 SHEETS-SHEET 1.

[/VVENTOR U. SPIRO.

RIBBON MEGHANISM.

APPLIQATI ON FILED JULY 29, 1910.

99%917'. Patented May 2,1911.

H Ni 1: N! 0/8 0. SPIRO; RIBBON MECHANISM.

APPLICATION FILED JULY 29, 1910.

Patented May 2, 1911.

5 suns-swam a.

G. SPIRO.

RIBBON ME APPLICATION FILED JULY 29,1910.

GHANISM.

' Patented May 2, 1911.

5 SHEETSSHEET 4.

III: ll-llll [NVE/VTOR Afforizey C. SPI-RO. RIBBON MECHANISM. APPLICATION FILED JULY 29, 1910.

Patented May 2, 1911.

5 SHEETSSHEET 5.

R mmww \k QWDNKN\|\ ZNVE/yTOJe Gig/2646,2100,

#M ED TATS CHARLES srmo' on NEW YORK, N. Y.

Specification of Letters Patent.

Application filed July 28,: 1910 Serial No. 574,523.'

' RIBBON MEcHA 'IsM."

To all whom inf may concern:

Be it knownthat I, CHARLES SPIRO, a citi' zen of the United Statesyresiding at New York, county OfiNew. York, State of New York, have invented'certain new andusefut Im' rovements in, Ribbon Mechanism, of whichthe'following is a specificatlon, reference being had thereinto theaccompany ing drawing.

.la-rly .upon the. front in This invention relates bro'adly to the art of itypewriting inachines and specifically to ribbonmechanism adapted for, use particustrike type of typewritmachines. Y I

to construct a novel and simple ribbon mech- 'anismtfor front strike machines in such manner that the; longitudinal movement of the ribbon I is automatically: reversed when a pro-determined amount: of ribbon is rolled upon the windingspool.

A further, object A of this; n31

construct a ribbon mechanism, for typewriting machines wherein a the longitudinal movement of theribbonmaybe quickly and easily changed at- .the will of the operator, andanay also be automatically changedwhen a predetermined amountof ribbon has passed the printing'point. v

Anotherlobj eot of this, inventionlis to p rovide a ribbon-inechanisrn for typewr ting machines wherein a niulti-color ribbon may be easily andquickly shifted in such'man-j ne rthatpredetermined portions-will ,be prer A still further object of this invention vibrator may be sent-edandtlocated over the printing ,point during the printing ope1'at1on-., V

1 Another object ofrthis invention is tovprovidea ribbonmechanism with a ribbon .vi

brator having. the upper portion thereofso.

constructedas to form anwerasing guide and also a line indicator fol? thQprintii g point,

-Anotherobject of this invention is to provide a ribbon mechanism .wherein; the amount of movement or throw ofithe ribbon pro-determined at the will oftheoperator. .i

- Another objectof this invention is tocon- "struct a ribbon mechanism wherein the ma:

oiity of the elements thereof are formed from stamped sheet metal... parts.

' ventionjiwill he principallobiect-jof thisinvention by the appended claims to construct a ribbon mechanism in' such manner that alight friction brake is at all times applied to the ribbon in such manner as to prevent the ribbon from becoming slack or loosebecause of unwinding too ra Idly fI'OIII the free ribbon spool during t e printing operation.

Still other and further objects of this invention will in part be obvious andwill in part be pointed: out in the specification hereinafter by referenceto the-accompanying drawings wherein like numeralsare used to indicate like parts, and the scope of the ine more specifically pointed out Figure l is a 'frontelevational vievvsho'wmg the relationship of the ribbon spools,* vibrator and attendant mechanisms, withregardto'the' other members' of'the typewriting machine; Fig 2 isa'view showing Patented-May 2, win

ty ewriting machine in sectional elevation taken on the center planeofthe machine and showing the relationship of the various elements hi the ribbon mechanism.- Fig 3 is a detail view showing the ribbon mechanism actuating devices: as connectedto thelspacl- Fig; 7 is a detail. iew

tion. vFig; '8- isa 'pian view of the holding (log .Sho vn in Fig. 7 9 is adetail 'view showing one or the reverse levers infelevation. FigL 10 is a plan View of mai s-a ni s-m shown in Fig. 9, v Fig. 11 a detail View showing" one of. thesdo'g" retainers' iii elevation; Fig. 12 is a plan} View showing the dog retainer illustrated Fig; 11,": Fig. .13 is a view showing the 'multi-color shift mechanism assembled. "Fig; 14 is ja plan view of a 4 portion ofjthe 'multi'-color' shift *me chamsm. Fig; ;15 1s a view show ng a portion ofth'e mold-color shift mechanism in 'frontelevatio'n Fig. 16 i's 'a view showing one of the connecting linksjn side"eleva-' tionl Fig.1 1? i'sai view showing the link illustrated in 16 edge elevation.

Fig. 18 is a plan View showinga portion of the r'ocker frame ig; 19, is a iewaw:

ing one of the actuating bell cranks inelevation. .Fig. 20 is a plan view of the; bell crank illustrated in Fig. 19. Fig. 21 is a view showing the detaining spring in eleva- 5 tion. Fig. 22 is a plan view of the part illustrated in Fig. 21. Fig. 23 is a view showing the mechanism for reversing the longitudinal movement of the ribbon in assem- A bled relationship. Fig. 24 is a view showing the mechanism illustrated in Fig. 23 in elevation. 7

Referring particularly to Figs. 1 and 2 of the drawings, it will be noted that several features of the typewriting machine are 1 illustrated which do not specifically cooperate with the ribbon mechanism, but these features and elements are illustrated for the purpose of showing'generally the relationship of the ribbon; mechanism to the general 2 construction of the typewriting machine.

The portions of the typewriter which do not relate specifically to the ribbon mechanism will be described hereinafter in a general sense, the specific description appertaining 2 particularly to' the especial mechanisms 'em bodyin'g the construction used in the ribbon actuating devices. However, I desire that it shall be understood that such portions of v the typewriter which do not pertain'to ribbon mechanism, are not claimed in'this applicjation. i n Referring more particularly to Figs. 1

and 2 of the drawings, the machine frame comprises a main portion which includes sides 1, rear portions 2, front bar 4, and supporting posts 5, upon which is mounted a top plate 6. A front board or plate 7,

ismoun'ted in'the'rearof a key board 8," and protects the general type bar construction, not shown inthe drawings. A platen c'arriage9, whi 'hsupports the shifting carriage frame 10,'is mounted forrec'iprocation'upon' a carriagebed 11, by means of bearing balls 12, which are adapted to runin accurately carriage frame 10, supports aplaten' 14, and a paper feeding device 15. The platen carriage 9 is adapted to'be driven by means of carriage'propulsion' mechanism'lG, which is supported by the top plate 6, insuch manner:

as to have operative connection with the platen carriage 9. is arranged at the rear of the machine and is operatively connected with shift keys 1 8 and 19, in suchmanner asto cause the shifting carriage frame 10 to be raised and lowere at the will of the operator in order to position the platen 14 in the differentp rinting positions. Line spacing mechaniSnil QO, is in order to enable the platen to be turned for line spacing. As the above set'forth mechanisms do not i 4 tion of this invention, further and more detailed explanation is thought tobe unneee manner that the V are moved vertically. for each actuationof actuating links. I st re supported at theirupper endsby-be-v .ing pivotally connectedasat 45, :ind,.46,-;t0. small bell cranks 47 and 48, which translate. machined grooved ball races. The shifting and 52, to the other arm of, the bell cranks Shifting mechanism '17,

sheet material, are provided with wide on,

arranged at the right of the carriage frame specifically form a por essary, and therefore attention will now be directed specifically to the ribbon mechanism. V p 4 1 Referring more particularly toFigs. 2,.3, w 13, 23 and 24, the ribbon mechanism com- 7 prises ribbon spools 21 v and 22, that are mounted to rotate upon

vertical stub shafts

24 and 25 respectively. Each of

thestubshafts

24 and 25, carries fixedly mounted thereon

ratchet wheels

26 and 27 respectively, and are provided at their lower ends with

stud screws

28 and 29, which are adapted to pass through'vertical shift links '30 and 31, which are connected with the platen shifting mechanism and cause the 0 ribbon spools to be shifted in a vertical'drrection when the platen carriage is shifted from one printing position to another.- Asthis specific mechan sm is claimed in asepa: rate application filed August 4, 1910, Serial 575,523, further description of the shift: ing features of "the ribbon spoolsis omitted from this application. Vertical actuating links 34 and 35, are pivoted to the actuating bell cranks 36'alnd 37, upon which-the universal bar 38 is' fixedly mounted .in such actuat nglinks 34" and 35' the universal bar when moved finder the influence of a sub-lever 39, (one of which ;is7

illustrated in Fi .1 13) during the printing operation. In order that the

verticallinl'ifij

34 and 35 may be actuatea ian g p ci' bar 40 is operated, by striking the finger key 41 formed npon the forward endthereofithe lower ends-of these links are provided with Offset pbrt dn' M 64 whi h are adapt ed to passjunder the arms to or mena i g bar, andto thereby rorm nios raave cone 1 motion between" the pacing b r and}. the. The aetuatinglinks 34 and the vertical motion of the actuating links into a horizontal motion in order to operate actuating dogs 49- and 50, which are ,pivet ally supported at their rear .ends'fas at .51

47 and 48 respectively.) 1 Referring particularly to Figs. 3,123- and 24, it willbe noted'thatthe actuating dogs 49- and 50, which, re formed ofresilient gagingflfaces 54 and 55, which are adapted to engage the teeth of the ratchetwheels 26- and 27 respectively. The-forward ends of the actuating dogs 49 and 50. are hi furcated and are adapted to be guidedby lugs 56 and 57, which arestruck up integral; from the sheet metal holdingdog's' 58 and 59. The ratchet wheels 26 and27 are adaptedLto be, held froml retrograde movement when under the influence; oft-he actuating mechanism, by means of the hereinbefore with the.- inner end adiiiotedg ratchet wheels}; The uholdingdogsfig andv -59',*:are; formed in the bell cranks andnrepivoted to the top plate 6, as at 60 and; 61. and :59,' are provided withrear extensions and i36 -:which are constructed ,in such manner as to be' adaptecl to co-no't withdog retainersor latch members 67- and 68, for a, IJIII'POSeiWhlCh will bemore specifically de- Q scribed hereinafter;- connecting fyqke or Referring particularly to Figs and 24,: follower,

members

74 and ,,7;5

inbefore send, cgnryon their lower ends ca-m menibers 78,-a-nd 79; QThe forward ends ofthe li h l sp i pre'ssedegainst a roll qoii ribbon carried by" nd 22',-by'.means of} followers 7 4 and 1 75, :a

the ribbon "spools, 21 a light coiledrspringsfill ohdISI, in such man.- 11erthtit-;t he 'posit1onof the ram members is determined. by the nmonnt of ribbon which is wound :on; tlfe'flspools. The reajrflend's of h i-fe le 'in mbersFi-end 5, re pr the :foll0\\"ers ;1nay' inannally i actuated to cause the parts to 'be ,thr'on rn in position to reverse the ribbon Dog reta nrsor latch members (57 and (iS here nhefore mentioned,

are piotallyfmonnted' as at 82 and "84, to the. top plnte 6,' a nd' n1'e resilientlyheldwith midi-'95., that" are formed integral with the holding dogs 58 59 f The outer ends of theidoggretainersl' or let 'ch members '66 kind 6 7 ,i e;re pro v'i(led with doulole faces as at 96'.

miter .e of the'caniniemhers 783ml 79.

ziiidiQQ. are. edep'ted to co ma er of r ght ii g p spool to the other,

ingl' 'vith 'it the cam 1tached to the followerfstub "shaft; doing' it will be noted that the coiled spring. lever 69,-'is xpivotallyattached: to the topw plate '6,- as s t-70,,- and isj-adapted to contact bell crank ;

portions

7,1 andfl72 of the holding-dogs 58 and 59,; in such manner as t JcauSe-Qne pairofootnating holdingdogszto be disengaged-from. their: companion =mtcheh: .w-heel. hen,- the other pair of actuating dogs isthrowninengagenient with the other Of the .rqtohet wheels, hyme'aris of mechanisms ;Wh l0h will, nowzbe more. specifically vdescribed. I 25, are pivotally mounted upon short stnbshafts? if) and 77"'respec t i vely', inf suchjmanner as to; permit of a vertical movementof the ribbon? spools during theshifting n oyement here-i mentioned, The stub shafts 76 and 'TZJare mounted for rotation in the op plate "are disengaged from the o operate the

rear extensions

65 and 66 voft isimamdo s m snohi'me'nneras to" V and 'an' actna'tiiig'jdog o'iifiof engagement with'theirrespective ratchet'jvhee'l'when it" is desirable that thefri'bb'on should bewound zThe holding dogs" 58 upon fthe'opjjosite ribbon spool." It will be:

noted that as: the'ribbo lifiswonnd' from one" moves inwardon tlieflun'it inding 'splool carrythe follower iiiember lber which; is t;

In- .so

attached to the caiii niember 'and'tjo the parme iteld ng. d brought- 'u'nd er greater p'z rticular coiled 1 spring it Will be noted,- is

Whichitheilribbon isjbeiiig Wound; and-this bfong'htnnderlsslimd less tensionp: Vhen x the [ribbon I heist been? siiilicie'ntly unwo nd i I from the free' spoo'l its tofa l-low-tlre ca-m: meniber etjttac'hed to this particular "follower to e age he .feceton therdog retainer, the

c said dog retainer' will'be'forcetl rea wardiy Ii stiflicientlyftoflrelease the holding an'd*ac-- tuz ting dogs; which 'will. thrown intoflenf gegeme'ntwith the part irnla r; ratchet Wl eel-' because of the excess it'ensioirin the coiled springfconnec ting the cam me1nbe1"and-"thel1old1ngf lQg, as compnred to tlieten sionof' "the cam member andt-he holding dog which;

are beneath the full ribbon spool; 'As the actuating dog and the holding dog -a're thrown into engagementwith one ratchetwheel, the actuating dog-mid holding dog pposite ratchet Wheel because of the operation of the connecting yoke or bar 89. 1 It will be noted that. the engaging faces 54 and 55 on th actuating'd'ogs and also the engaging-

faces

62 and 64 on the holding dogs, are of as'ufiicient width to engage "the ratchet wheels in either of the seveml positions to which the l.

ribbon spools may be shifted in" a vertical d rect on because "of the shift ng mechanism herein'beforementioned.

' Having described thefgtetuating 'niecha- 'nism for the ribbon spools; attention is parti'ofnla-rly' called to Figsi 2; 1-3, 15 and 18,.

which 'refer specifically to the actuating mechanism for the-ribbon vibrator or shuttle and to the'de'vices Whereby'the-shuttle is vibrated to different printing positions in order to position; vnri'onsportions of': multi-color "r1bbon over the pl'llltliig point; M

A' bell crank member aboiith pivot member 101, whiclvisaxitlly 100', is'attache'd to the" universal bar 38, andjis inonnt-ed to rot'siite;

alinedw'itli the 'axis 11 pon ivh'i ch the universa'l bnris'mounted to turn?The hoi'i'zontalf portion of "the bell crankmember ispro vided with .a T-sha'ped open" slot 102; "and 1 carries a' resilient detain1ng. spring member k4. 104, which has three detention" notches 105, in its under surface. The outer-" end offthe resilient member 10 1' isadapted tocontact against a small stop pin 106; stud screw 107 is carried by a vertical connecting link 108 and'is adapted to be maintained in either of the detaining notches in the resilient spring member 104. -The relationship of the detaining notches 105 on the resilient detaining spring me1nber 1, is such that i the middle notch is directly over theopen portion 109 of-the slot 102. The vertical c meeting link 108, is formed with an offset d pending portion 110 on its lower end, 1 w ich is adaptedto lie 'within a slot formed in he outer end of a controlling link 111, whiclkpassesihrough an opening in the key lever. guide frame 112, and is connected at its outerf'end with an operating lever 114:, that ispivota-lly mounted as at 115, to a bracket 116, which is attached to the side wall 1 of the machine frame, and is provided on its upper end with a finger piece 117, which enables the operator to position the several parts in order to regulate the ribbon jthrowv for various multi-color chan es in 'a manner hereinafter to. be describe The.

' length of thedepending portion 110 on the vertical connecting link, and the. depth of theslot in the controlling link 111, is such as-to ermitof a vertical movement of the actuating link without the disengaging of the connecting link 108 from the controlling link 111. The upper end of the vertical connecting link 108-is pivotally attached to a yoke 118, 'hichcarries the ribbon shuttle or vibrator 119 pivotally mounted upon the front portion thereof, The yoke 118 is supported at its rear ends by being pivotally attached as at 120 and 121 to the inner yoke 122,' which is pivotally supported upon-depending bracket members 124:v and 125, that are ,ma e integral with the top'plat'e (hand is adapted to be held in definiterelation to 45 the printing point by means. of the platen shift-ing mechanismhereinbefore mentioned,

l which is connected to the inner yoke 122, by

means of adepending lug 126. The inner oke 122, carries uponits outer end a printmg point indicator and. line finder 127, shown particularly imFigs, 11., 2and 13; By actuating the finger piece 117, the verticll c0nnect1ng'1ink'108 is, moved through thejmdium. of the such manner as to controlling link 111, in osition the stud screw 107f in any one of the several detention notches'105r; in the resilient detaining spring member 104., When-the stud member is in the position shown'in' Fig. 13, that is, near: Qlpst to the ivot 101, the -ribbon throw will be actuated through a minimum amount of mov and only the upper portion of the ri gaawm be thrown'over the print'inm oint, JVli'e'h the stud screw 107 is retained 88 m the seeend notch, the bell crank 'mernber 100, upon being actuated, will. not move. the. 7 g for thereason, that the stud 107 will ride out through the open portion 109 of the slot 102, and-when .vertical connecting link 108,

the parts are in this particular relationship the type of the machine Will'st-rike without first strikingthe ribbon, and, this position of parts is particularly adapted'fo'r making stencils to beused in mimeographqwork, Asthe' stud screw 107 is moved to the third or extreme outer detaining notch, the rib-- bonshuttle or vibrator 119, will receive its the ribbon a suflicient distance over the printing the lower portion thereof and thus will print point to-enable thetype to strike at greatest degree of movement and'will carry I from a diiferent field of the -ribbo1fthan would be printed from if the stud screw 107 were in the first detaining notch.

Having thus described myinverition what v I desire to claim is 1. In a ribbon mechanism for typewriting,

machines, the combination of ribbon spools, a ribbon vibrator, means for actuating said ribbon vibrator, shafts upon which'said ribbon spools are mounted,-rat'chet,whe els fi'xedly mounted'upon said shafts,holding dogs for sand ratchet wheels, "actuating dogs adapted to actuate said ratchetlq wheels means for operating saidfactuatingdogs, and means controlled by the amount of rib bon on said ribbon spools for determining a when one of said actuating dogs shall be rendered inoperative, said last mentioned means including opposed spring members,

the operative tension of e'ach springmember bein 1n lnver'se proportion to','the' amount of ri bon upon its respective ribbon spool. c

2. In a ribbon mechanismfor front: strike typewriters, the combination of ribfl a ribbon vibrator, mea s for ac-- shaftsadapted to carry said ribbon spools, ratchet wheels; fixedly mounted upon said-shafts, holding dogs adapted to cooperate with said ratehet bon spools, A tuating said ribbon vibrator,

wheels, actuating dogs arranged to actuate'f said ratchet wheels, pivotalm'eans adapted,] to bear against the ribbon onsaidribbon} spools, means includingopp'osed springs conmeans for operating sai actuating dogs.

3. In a ribbon mechanism for fro'nt strike typewriters, the combination of ribbon spools, a ribbon vibrator, means for actuattrolled by said pivotal means for re'ndering 'l one of said actuating do s inoperative, and,

ing said ribbon ,vibrator, vertical shafts adapted wheels fixedly mounted upon said vertical shafts, holding dogs adapted to cooperate with said ratchet wheels, actuating dogs arranged to operate said ratchet wheels piv to carry said ribbon spools, ratchet otal followers adapted to bear upon the rib;- bon Wound upon said ribbon spools, latch -members adapted to retain-said holdingj'dugs and actuating dogs in inoperative 'position, I,

atively connected withsaid last mentioned means and means for actuating said actuating dogs.

4.111 a ribbon mechanism for front strikev typewriters, the combination of ribbon spools, a ribbon vibrator, means forectuating said ribbon vibrator, vertical shafts adapted to carry said ribbon spools, pivotal followers adaptedrto bear against the ribbon on said ribbon spools, vertical shafts in which saidpivotal followers are mounted, ratchet wheels operatively connected with said ribbon carrying shafts, holding dogs adapted to cooperate withsaid ratchet wheels, actuatingdogs adapted to actuate said ratchet wheels, means for actuating said actuating dogs, latch members, cam members 'OPQIZJ'ZIV-Qly connected with said'follower carrying shafts and adapted to cooperate with said latch members, means for enabling one of said latch members to retain one holding dog and one actuating .dog in inoperative position, and a yoke member operatively connecting said holding dogs.

5. In a ribbon mechanism for front strike typewriters, the combination of ribbon spools, a ribbon vibrator, means for actuating said ribbon vibrator, vertical shafts adapted to carry said ribbon spools, ratchet wheels mounted on said vertical shafts, ac-' tuating dogs adapted to cooperate with said ratchet wheels, holding dogs for said ratchet wheels, means for retaining one ofisaid actuating dogs and one of said holding dogs in inoperative position, and means for actuating said retaining means to release said dogs, said last mentioned means'including opposed springs, the efiective strength of each spring being inversely dependent upon the amount of ribbon on its respective ribbon spool, substantially as described.

6. In a ribbon mechanism for typewriting machines, the combination of ribbon spools, actuating means for said ribbon spools, tension springs arranged in opposing'relationship, means controlled by the amount of ribbon on said ribbon spools for determining the eifective strength of said tension springs, said means being opera- 'tively connected with said springs in such manner as to cause the tension strain in one of said springs to be increased, and the tension stram in the other of said springs to be decreased, and means for disengaging sa d actuating means from one of said ribbon spools."

7. In a ribbon mechanism for typewriting machines, the combination of ribbon spools, means for actuating said ribbon sp ools, said means including a pair of actuating dogs and a pair of holding dogs, means for actuat-ing said holding dogs, spring controlled means for rendering one of said actuating dogs and one ofsaid holding dogs inoperal'JYG. and means for rendering the eiiective tension of said spring controlledmeans inversely proportionate to the amount of riba hen on the respective ribbon spools.

.8., A ribbon. mechanism for a typewriting machine, including ribbon spools, means for actuating said ribbon spools, reversing means, said reversing means comprising oppositely arranged spring members, said reversing means including mechanism for rendering the efiective tension of. said spring members dependent upon the amount of ribbon on the respective ribbon spools, holding dogs, dog retaining members, and a yoke member operatively connecting said holding dogs.

9. A ribbon mechanism for typewriting machines, including ribbon spools, means for actuating said ribbon spools, reversing means, said reversing means including pivoted follower members adapted to bear upon the ribbon on said ribbon spools,holding dogs, cam members operatively connected with said follower members, spring members operatively connecting said cam members and said holding dogs, and a yoke member operatively connecting said holding dogs.

10. A ribbon mechanism for typewriting machines, comprising ribbon spools, actuating means for said ribbon spools, said actuating means including a universal bar, a link member operatively connected with said universal bar, a spacing bar, and means operatively connecting said operating link with said spacing bar, substantially as described.

11. A ribbon mechanism for typewriting machines, including a ribbon vibrator, a yoke member operatively connected to said ribbon vibrator, a universal bar, an actuating machines, including a ribbon. vibrator, an

inner yoke member pivotally mounted upon the machine frame, an outer yoke member pivotally mounted upon said inner yoke member and operatively connected to said ribbon vibrator, a universal bar, a slotted bell crank attached to said universal bar, an

actuating link operatively connected to said slotted bell crank and to said outer yoke member, and manually controlled means for determining the relationship of said actuating link with reference to said slotted bell crank, substantially as described.

13. A ribbon mechanism for typewriting machines, including a ribbon vibrator, an inner yoke member pivotally mounted upon the machine frame, an outer yoke member pivotally mounted upon said inner yoke member, a universal bar, a slotted bell crank member operatively connected with said universal bar, an actuating link, means attached to said actuating link and adapted to cooperate with said slotted bell crank, a

thumb piece, and means connecting said 10 thumb piece With said actuating link, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

CHARLES SPIRO. WVitnesses:

EDWD. E. JONES, ALBERT T. HOELEN.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G.