US869526A - Type-writer mechanism. - Google Patents

Description

PATENTED OUT. 29. 1907.

J. B. SEUOR. TYPE WRITER MECHANISM.

APPLICATION FILED 0015. 1908.

2 SHEETS-SHEET 1.

PATENTED OCT. 29. 1907.

i. B. SECOR. TYPE WRITER mncmmsm.

LPPLIOATIOK FILED OO'LE- 1906.

2 sums-saint 2.

ITTORNEIS UNITED STATIFZS TEXT omen TYPE-WRITER MECHANISM.

Application filed October type-bar with progressively decreasing leverage so as to afford an easy touch at the beginning and accelerated motion of the type-bar toward the end of the stroke.

The invention also relates to an improved construction in the fulcrum-joint of the typebars.

15. In carrying out the first part of my invention, to effect progressively decreasing leverage with accelerating motion in tbe typebar action, I employ, in combination with a key-lever of the second order, that is to say; fulcrumed at its rear end. a vertical link pivoted at bottom to th key-lever intermediately of the ends of the latter, looped at top and having a horizontally extended bearing surface engaging at successive points with the horizontal arm of a bell crank sub-lever rocking on-a horizontal pivot. and the upper end of which is connected by a link with the heel of the t ypebar,

' the form and construction of the engaging parts of the top of the vertical link and the horizontal arm of the bellfcrank being such that in tii beginning of the downward stroke of the key-lever, the vertical link engages with the bell crank at a point remote from the fulcrum thereof and subsequently at a point nearer the fi.lcrum so that three-fourths (more or less) of the entire motion of the key-lever may be expended in eficctiug the first half of the motion of the type-bar and the last fourth of the key-lever stroke will effect the latter half of the stroke of the type-bar.

In the accompanying drawing: Figure 1 is a side view of the type-bar operating mechanism of a front-strike I typewriting machine illustrating my invention, show- 4() ing in full lines the position of the parts before the type-bar is moved. and in dotted lines the position of the parts at half stroke. Fig. 2 is a side view of the same parts showing in full lines their position at the end of tho slroko and indicating in dotted lines the posiiion of the linger key at the beginning of the stroke and its position when one-half the movement of the typediar has hocn effected. Figs. 3, -1 and 5 are detail views. partly in sci-lion. showing the relative positions of the vertical link and the hell crank sub-lover operatcd thereby athceinningol' the stroke. at half stroke and at. the cmnplciiun of thc slrokcrespectively. ii is a sidichrvul'ion of a typo-liar lu'ackct dclachcd. Fig/Z is a side elevation of the heel portion of typo-bar tlcizlt'llcil.

Specification of Letters Patent.

5. 1906- Serial No. 337.641.

Fig. is rcrlinil imnsvcrsc section oua larger scaliof tin tum-bar hmckct and i lrically aroun-i llu' ;|\i= in i ciill! slot 14. and the 110 Patented Oct. 29, 1907.

heel of the type-bar fulcrunmd thereto. Fig. 9 is a front vibw also on a larger scale, of the vertical link and bell crank sub-lever at beginning of the stroke showing also the key-lever in transverse section.

i represents one of a set of key-levers which may be of common form and (as here illustrated) fulcrurned at the rear end on a common transverse bar 2. 1 represents the fingcr-keyg-J a tension spring by which the key-lever is drawn up after depression in printing and 4 a cushion bar against. which the said key-lcvers are drawn and supported by said springs in their normal position of rest. 5 represents the customary comb-bar by which the key levers are guided and held against lateral motion. Y

At a suitable point between the ends of each keylever, a vertical link 6 is pivotedor loosely jointed in suitable manner. A suitable connection is illustrated in Figs. 1, 2 and 9. This link, formed as shown in Fig. 9, constitutes aloop. the top 7 of which is extended in a horizontal direction, parallel with the key-lever or in the plane or oscillation of the bell-crank sub-lever, with which it cooperate so as to adapt it to hear at successive points on a correspondingly err tended bearing sur Fee 8 of the horizontal arm 9 of bell crank sub-lever which turns on a fixed pivot 11. The vertical arm 10 of the bell crank lever is formed with a book 12 to receive the forward end of a horizontal link 13, the rear end of which is pivoted at I 4t o the heel of a type-bar 1-5 fulcrumed at 16 in a suitable bracket 17 mounted on the fixed bridge. 18 of the frame. The fulcrum pin 16 has preferably the smooth hardened steel cup or washer 16 around its head to give enlarged bearing for the type-bar.

The bracket hcrc illustrated consists of two similar cheek plates. one of which is shown detached in Fig. 6. which conlinc between them the heel of the type-' bar 15. which is shown detached in Fig. 7. In this Fig. 7, 16' indicates the fulcrum aperture which rc coives the fulcruin-pivot-bushing. 14 the aperture in the heel for reception of the pivot attachment to the rear end of the horizontal link 13 and 16 a segment slotpermitting passage of a pin 16 having the screwthreadcd portion passing through a similarly threaded hole in one check-plate. then through the slot 16 in the typo-bar heel. and shouldered at 16 to engage 100 llN' inner wall of the other chwk-plate-thc reduced portion of the pin passing through the second choc platibeing tin-n rivctcd over. The acre may be adjust d thci-cforc lo act both as a spanning and bind-,

in screw for rhc clm-kplai1-s. holding them rigidly 105 at exactly the right distance apart.

The chcok-plalcs of the i'l'ni'livl l? and the iii-cl of th type-bar which works ln-iwc n them are each perforaicd with ic ;i-l crin; age-rim: Hi" arranged ('umcrli l l l Q lacunae 'particularly in Figs. 6, 7 and 8. By reason of these openings and the stamped recessing of the cheek plates the frictional surfaces are much reduced even though the bearing surfaces be extended to a wide radius.

The stamped recesses in the cheeks 0f the hanger surrounding the fulcrum pivot of the typebar are shown in the sectional view, Fig. 8. The primary objcct and effect of these recesses in the hanger-plates are to remove the surfaces from contact near the center or fulcrum. The motion is so slight near the. center that any accumulation of dirt or oil soon acts as a par tial cement rcsul ting in sluggish movement and liability of the bars to finally stick fast if in close contact with the hanger plates close to the fulcrum, whereas by re-.

moving the guiding contact between the typebar and hanger to a greater radius from the fulcrum I not only provide greater lateral steadiness in the typebars, but

by the increased arc of movement between the friction surfaces enable them to constantly work themselves clean from dirt or viscid oil. By arranging the guiding surface in the form of a narrow concentric band re-" mote from the axis the typebar is steadied without being pinched by the hangers and will run freely even though the joint be quite dirty.

Where the bearing surfaces are broad without recesscs and openings oil applied to the joint and becoming viscid and gummy retards the free actionof the parts.

Another important function of the registering openings referred to is to cut out and discharge any dirt which may get into the joint, thcreb keeping the joint clean and free.

It has heretofore been proposed to aid the discharge of dirt and obstructions from the joints of the type bars by providing a series of apertures in the bracket and using therewith a type barwith a heel sufficiently narrow to unmask or expose these apertures at each rndvement, and providing a broad lateral bearing on one side only ofthe type bar heel.

My device differs from the above in I'oom-- pletely cover both sides of the type-bsr-heel between two cheek plates of which the bracket is in part constituted and provide a. concentric series ofregistering apertures in the heel of thetype bar and in both'cheek plates of the bracket no that at each movement of the type bar a series of apertures are opened, extending completely through the opposite cheek plates and the inclosed heel of the type bar. I thus provide a. hw-

ing of large radial extentwithout objectionable increase of frictional resistance and at the 'same time i "provide for the free discharge of dirt, lint or other nittcr which might otherwise clog the joint. The connection between the vertical link 6 and the horizontal arm 9 of the bell crank sub-lever by which the key-lava is made to act on the type-bar with profromivoly dwelling leverage and accelerated modun, is best shown in Figs. 3, 4 and 5. To permit movement betweon'the ports with minimum jrlcdoh nnd prevent relative displacement, the lioriontal bell crank arm 9 is formed at bottom with a cam shaped projection 19, hearing on a stop pin preferably the walls of the link 6 and turning freely on its pivot 21. Beneath he top 7 of the link, a rib or lip 22 projects downward inn a narrow slot, opening into an enlarged recess 23 within the bell crank arm 9, so as to prevent mutual disconnection between the said link and bell crank without interfering with the angular oscillatory movement of the latter.

By comparison of the several positions of the parts in successive portions of the stroke of the key-bar, shown in Figs. 1 and 2 and the relative positions of the engaging parts shown in Figs. 3, 4 and 5, it will be seen that at the. beginning of the stroke the vertical link bears on the horizontal bell-crank arm 9 at a point so as to act with the greatest leverage, affording light action to the key-lever at beginning of the stroke and imparting at first comparatively slow movement to the type-bar. It results that about three-fourths of the complete key-lover movement, 1'. 0., from the full line first to second dotted position of the key 1'- shown in Fig. 2, will move the type-bar only 45 degrees or onehalf its complete stroke as indicated in dotted lines in Figs. 1 and 2.

The position of the mutually engaging parts of the link and bell crs'nk sub-lever at this half stroke position of the type-bar is shown in Fig. 4. By comparison of this with Fig. 5 showingthe position at termination of the stroke, it will be seen that from the half leverage and accelerated movement of the typebar, the latter half of the type-bar movement being efiected .by on; last one-fourth of the key-lever movement, or from the second dotted positions of the key 1 in Fig.-2 to the full line position of the key-lever in said figure. 24 represents s tension spring attached at 25 to the bottom of:the horizontal link 13 and at 26 to a fixed point on the machine, to retract the'typo-bar 15 and bell mnlr love 9, 10 to normal position when the keylever is released. Both springs 3 and 24 may be emoither place, the other spring may be omitted.

27 represents a spring bar to receive the impact of .the type-bar, and 28 an alining stud carried thereby. 29 indicates the platen of I. front strike machine, in connection w ith which jlzhsve illustrated myjnvonu Having thus described my invention, the following ,is what 1 claim is new therein and desire to secure by 1. In a type-bu operating mechullsm for trpewritlng machines, the combination of 1 key-lever, a link pivoted by one end to the keylewer and formed at its other end with an extended bearing surhch. a bell crank cub-lever pivoted at its elbow on n fixed fulcrum not! having an um with a bearing surface unending longitudinally at face lnithe end of said link, and a type-huto hich the -other arm of'the boll cram: sub-m h connochd. whacthe point or contact between it and the link, nearer the tho printing stroke.

.2. In a typo-bpr'operlflng-rnmhsnhmjor mam ploye d, or, by employinga slightly stronger spring in carrying an anti-friction roller 20 confined between most remote from the fulcrum ll, as shown in Fig. 3,

to the dotted line position shown in Fig. 1 or from v stroke position the parts coact with rapidly decreasing letters Patent.

paid arm and cooperating with the extended bearing m- I by the angular motion or' hs bell crank sub-lever mm fulcrum of and bell crsnk ub-lover toward the end of dlnally of said arm and cooperating with the horizontally angular motion of the bell crank lever shifts the point of lever fulcrumed on a fixed pivot and having a substanpoint of contact therewith of the vertical link. toward the .one end to the key-lever. a bell crank sub-lever fulcrumed the first beil-crank-arm being extended in the plane of os- 1'. in a typo-bur actuating mechanism for typcwrltim:

machines. the combinntion'of a key-lever, a vertical link plvcted by lts lower end to the key-lever intermcdinlely ol the ends of said lever. and formed at its upper end with a horizontally extended bearing surface. a hell crnnk sublever pivoted at its elbow on a fixed fulcrum and having a horizontal arm'with a bearing surface extending lollgii'lr extended bearingsurface in the uppcr'end of said vertical link, a link Jointed at one end to the other arm of tlic bell crank lever, and a type-bar to the heel of which the. other end ofthe last namedJink is pivoted. whereby the contact between it and the vertical link. nearer the folcrum of said bell crank lever toward the end of the print.-

lng stroke.

in a type-bar actuating mechanism for typewriting machines. the comhinutlonof a key-lever, a link jointed at on a fixed pivot and having one'arm on which the said link acts and another arm transmitting movement to tile type-bar, the cooperating bearing surfaces of the link and cillation of the bell crank lever, whereby the angular mo tion of saidbell crank lever shifts the point of Contact of the link therewith toward the fulcrum as the stroke prograsses; and means for preventing the relative displace ment of these cooperating parts in the printing stroke, substantially as described.

4. In a type-bar actuating mechanism for type'w ritlnz machines, the combination of a key-lever, a vertical link jointed at its lower end to the key-lever. a bell crank subtlaily horizontal arm on which the vertical link acts and a substantially vertical arm transmitting movement to the type-bar, the coiiperating bearing surfaces of the vertical link and horizontal beli-c'rank arm being extended in the plane of oscillation of the bell crank lever, whereby the angular motion of said bell crank lever shifts the fulcrum as the stroke progresses; and means for preventin: the relative displacement oi these cooperating parts. substantially asdescribed.

5. id; type-bar actuating mechanism for typewriting machines; the combination of a key-lever. a link pivoted at one end to the key-lover and having at its other end a bearing surface extended in the plane of oscillation of the.

bell crank suhlever with which it codperntes, a bell-crank sub-lever fulcrumed at its elbow on a fixed pivot and having one arm with an extended bearing surface cooperating with the extended bearing surface of the link so as to shift the contact point between said bearing surfaces to ward the fulcrum of the sub-lever by the angular motion of the latter; a rib on one of. the said bearing surfaces and a recess in the other bearing surfaca'into which said rih projects to prevent the relative displacement of the parts in operation, substantially as described.

6. in u type-bar actuating mechanism for typewritlng machlncsfthecombination of a key-lever, a vertical llnk pivoted at its lowerend to the key-lever and having :it its upper end a bearing surface extended horizontally in the plane of oscillation of the bell'crnnk sub-lever with which it coiiperates, a bell crank sulrlever fuicrumed at its elbow on n fixed pivot and having a horizontal arm with on extended bearing surface coiipcratlug with the extendedbearlng surface of the link so as to shift the contact point between snid bearing surfaces toward the fulcrum of the sub-lever by llie angular motion of the latter. a rib on one of the said bearing surfaces and n recess in the other bearing surface into which said rib projects to prevent the relative displacement of the parts in operation, subslantlally as described.

machines. the combination of a key-lever. a link pivoted by mend to the key-lever a looped at its other end formin two parallel walls, n ll crank sulrlever hnvim: one arm receivai within the looped upper end of s'nld link and actuated thereby. a rib on one of these coiiperaling membgva projecting into a recess in the other member to prove'nt their relative displacement in a horizontal direc-' tlon. means for confining the said bcll crank arm length:

Wise of the linkto prevent separation of said confining rib and recess. type-bar and connecting menus between the second arm of the bell-crank and the type-bar, for actuating the latter.

S. in a type-bar actuating mechanism for typeu'r tiu:

machincs. the combination of akcy-lever. a substantially vertical link pivoted by its lower end to the kcy l'evcr and having a looped upper end form ng two parallel walls. a bell crnnk sub-lever having a substantially hovlznntnl m'nl rcccived within the looped upper end of sold link and actuated thereby a rib on one of these cooperating members projecting into a recess in the other member to pre vent their relative displacement in a horizontal dircrr tion and lncuns for confining the sold l-cll (rank arm -rtically in the link to prcvcnt scpnration of said confining rib and rcrcss.

9. in a type-liar actuating mechanism for lypeu'rltlnzz machines. the combination of n key-lever. a link joiniod nt one end to the key-lever and looped at its ntlu'l' end. :1 bell crank lever having one arm inclosctl in tho luupcd cm] of said link. :i rib projecting inward from the end of the looped link into a rcccss in the bell crnnk arm to pvi-vcnl relative movcmcnf lrnnsvcrsciy to the link and a transverse pin in the loop ci-iipornting with n protnlm-nnce on the bell-crnnk-arm to prevent displacement of the parts longitudinally of the link \vilile permitting oscillatory movement of the bell crnuk. substnniiuily us describcd.

it). in n typc-l-zlr actuating mechanism for ly wivrlilng machincs. the combination of a key lever. u. substantially vertical link jointed at its lower end to the key-lever and having n looped upper cud. :i bell crnnk lever having a substantially horizontal arm inclosed in the loopcd uppcl' ehd of said link. a rib projci-iingdownward from the top of the looped link into a recess in tin.- lmll-crank-nrm to prevent relative horizontal movement and a transverse pin in the loop coiipcruting with n protuberance on the V bottom of the beibcrunk-nrm to prevent vertical (lispluccmerit of the parts while permitting osclllniory movement of t hol -crnnk-lever,' substnntinlly as described.

11. in a type-bar actuating mechanism for typcwrltlng machines, the combination of a key lever, :1 link jointed by one end to the keylever nnd'formed at its other end with a loop providing within its extremity u bcznlng surface extended in the plume otfloscillatlon of the bell-crank lever \vii'l which said link cooperates, a bell-crank sub-lever having one arm inclosed in the loop of said link and bar-- ing an extended bearing surface cooperating with that within the extremity of the loop so that the angular motion of the bell crank lever causes the point of contact between the link and bell crnnk lever to nppvonch the fulcrum of the latter dun-inn the progress of the stroke. :1

recess in one of the cooperating members and n rib on the other entering said recess to prevent relative displacement of said coiiperailng parts in a direction transverse to the "link, on anti-friction roller pivoted within the loop and cooperating with a protuberance on the bell-crnnk-urm to prevent displacement of the ports longitudinally of the .link while permitting the oscillatory motion of the bell crank lever and n type-bar with which the second arm of the bell crank lever is connected.

12. in u type-bar mechanism for typcwritlng machines. the type-bnr hunger having cheek-plates affording fulcrum support for the type-bur betwcen them and n separating and binding screw engaging both clicck-plntes,.subsinutinlly as describod.

13. in a typo-bar mechanism for typeu'riling machines, the type-bur hunger having cheek-plates nlfol'ding fulcrum support for the type-bar between them and a separating and binding screw having screw-threaded cngnggnucni with one clleckplaie and having rotatory suppor but hold from longitudinal movement in the other chock-plate. substantially no described.

14. in a type bar mechanism for iypcvvriling machines. the cmublnallon of a hunger and a typo lslr pivoted lhcrcin. live fluid hanger and the heel of the typo bur being ioolh provided with amt-lures :xt'rnngwl on arcs concentric with the fulcrum so as to 'rcgislcr with and pass one another in the movement of the typo bar in Ol'dli lo cut out and discharge dirt from the joint. substantially as dlscribed.

15. in a type bar mechanism for lypcwriling nu inc-t -in' the movement of the type bur, substantially us dothe combination of a hanger constructed with a. pair of check-platcs and :1 type bar pivoted therein. the heel of the type bur being embraced between the cheek plates of the hunger and. the said hanger and the heel of the type bnr being provided with apertures urrangcd equidistantiy from the fulcrum center. 50 as to register in the movement uf the type bnr in order to cut out and discharge dirt from the Joint, substnntiaily us described.

16. in a type bur mechanism for typewriilng machines. 5 the combination oi. a hunger constructed with n pair of cheek-plates having an interior recess. and a type our \vhcse heel is pivoted in said hunger und en'ibruccd between then L'hPPkplntQr. ther of, the said check-plates of the hunger nnd the heel 0: the type bur being provided with registering apertures uduptcd to cut out and dischnrue dirt 17. In at type bar mechunism for type-. citing machines the cunbinntion of n ype but und a hunger thcrcfiur. mid hunger and the heel of the type bar being both provided with rczistering upertnrcs and the apertures in at least 1 one of said members being urrnnged in a series concentric with the pivot on which the type bur \rurks, to rcduce'trictlnn and i'ucilltnte the discharge of dirt from tlm'jolnt suhsnmtialiy as described.

in. in u t 'pe'bnr mechanism for typewritiug machines.

with check plates etnhruclng the heel oi the type-bur and between which it-ie pivcted, the said type-bur heel and hi'inger cheeks being provided with registering upcriurse and the (apertures n uL least one 01! said members being arranged in n se ies ccncentric'with the pivot of the typebut to reduce friction and facilitate the discharge of dirt in the movement of the type-hnr,'substnntiul1y as described. I I

19. in a type'nnr mechanism for typewriting machines, the combination of a typebnr and a hanger therefor having registering apertures 01 the typebnr end said hunger 1m ving on its face adjacent to the typebur un annular recess surrounding the pivot: nd n concentric guiding surface for the typebar remote iron". the z'ulcrum center, subsznntiaily as described.

20. in a typubar metiuinisi'ii 1'01: typewritlng machines, the combination of n typebur rind a hanger constructed with check piuics embracing the heel of the typehnr and i erwccn which it is pivoted, said typebar und hunger being both provided with apertures for discharge of dirt in the movement oi the typehur, and the hanger-cheeks having on their inner faces adjacent to the typcbnr recesses surrounding the pivot and providing concentric bearing suriures for the typchur remote from the fulcrum-center, subntnntiuiiy us ticscribvd. I

21. in :i typcbnr mechanism Idr typewriting machines, the combination with u. rypcbnr of u fulcrum hanger therefor formed of sheet mctul \vllh cheek-plates embracing the tyiwlxll' hccl on both sides and having stamped in their inner fut-es annular recesses forming concentric guiding surfaces for the typehnr remote from the fulcrumcenter, mlimtnntiniiy as described.

JEROME Bi FECOR.

Witnesses F. L. Osrnnnoun'r. G. A. ALLINGHAM,

for dlschnrge'ot dirt n the movement 7

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