US819365A - Type-writing machine. - Google Patents

Description

No. 819,365. y PATENTED MAY 1, 190e.

H. A; MOYER & E. G. LATTA.

TYPE WRITING MACHINE.

APPLICATION FILED APB.28. 1905.

2 SHEETS-SHEET 1.

No. 819,365. PATENTED MAY 1,1906.

A H. A. MOYER & E. G. LATT TYPE WRITING MACHINE.

APPLICATION 'FILED APB.. 28. 1905.

TF4 1j,

1111111A f 4 k To all whom, it may concern: l

-prove the. construction of the NTED STATES PATENT sonren."

HARVEY A. MoYER AND EMMIT e. LATTA, oF sYirAoUsE, NEW YORK.

TYPE-WRITING MACHINE.

Be it known that we, HARVEY A. MOYER and EMMIT G. LATTA, citizens of the United States, residing at Syracuse,.in the county of Onondaga and State of New York, have'invented a new and useful Im rovement in Type-Writin Machines, of whlch the following is a spec' cation. Y

This invention relates to t e-writing machines, and more particularly? the type-bar actions for front-strike type-Writing machines'in which the t e-bars are pivotally supported below the )platen and swing upwardly and rearwardly to make theimpresvsions at the front side of the platen, Where the writing is erposed to the view of the operator whlle using the machine. One object of the invention `is to produce a desirable type-bar action of simple, economical, and durable construction which insures a light 'touch and .easy'movement andin which the finger-ke s have a uniform dip and equal leverage, whi e the type-bars may .have an accelerating movement toward the-.printing-point. l

Another object rof the invention isto imangers for the type-bars.

In the accompanying drawings,` consisting of .two sheets, Figure 1 is a longitudinal sectional elevation of so much of a type-writing machine embodying the invention as is necessary to an understanding thereof. Fig. 2 is a rear elevation, partly in section, of a portion of the type-bar segment and hangers and portion of the keyfl'evers, the auxiliary levers, and theirpivota'l bearings.

also'showing a Fig. 3 is a fragmentary sectional elevation, on an enlarged scale, of one of the type-.bars,; its hanger, and the supporting-segment. Fig; 4 is a fragmentary section in line 4 4, Fig. 2, of the t e-bar segment and hangers. ig. 5 is an e arged sectional elevation .in line 5 5, Fig. 3, showing thetype-bar pivotal bearing.` Fig. A6 is an enlarged sectional `elevation of one of the hangers in line 6 .6, AFig. Fi 7 is a horizontal section, artlyin plan, in Iine :7.7, Fig. 2', of the pivota lbearings for the auxlliary levers. Fig. 8 isan enlarged sectional elevation in line 8 8, Fig. -1, rof the pin-'andbearings or l Specification of Letters Patent.

Applicata@ nei April 28,1905, serial No. 257.841.

I Figs. 11 and 12- areelevations of Patented may 1, 190e.

twodetached auxiliar leverslof different lengths;

Like etters of referencerefer to like parts in the several figures.

A represents amain frame, which maybe of any suitable wcznnstruction. circle .B indicates the platen when in-its nor.; mal position, and thebroken-line circle indi,-

The full-line Y cates the positionof the platen when shifted for printing. upper case characters. The ,type-barsfof which only one is shown at C, are arrangedA belowandinfront of the platen and are pivotally mounted, as hereinafter described segment D, Figs. 1 and 2, to swing upwardly on a curved stationary support or and rearwardly to the printing-point. The

key-levers E, one of which is shown' in Fig; l,- are yof the kind which are arranged longitudinally of the machine side by side, are pl'voted at their rear ends in any`suitable manner to the frame, and have upturned front ends bearing iin er-keys e. (Indicated by. full and brokenflines in'Fig. 1.)

The key-levers are alike except for the ference the length and the shape of their front ends, necessary to locate the fingerkeys in the dierent banks. (Indicated in Fig. 1.) Eachkey-leverEhasaslidin orslot-an in connection With an uprig t xauxiliary.

ever F, which is pivotedat its lower` end` on the frame-'in s ome suitable manner and is op-` erativ'ely connected at its upper end, Aprefer- Iably by a link f, with one of the tipe-bars, the arrangement being such that w en the lkeyllever is de ressed it oscillates theI auxiliar lever, whicll through its connection withthe type-bar swings the latter toward theplaten to make the impression.

The type-bars C are preferably mounted on thesegment or sup ort D by separatelysecured hangers. In t e construction shown in 1 to 6-the type-bar is made of sheet metal of uniform thickness throughout ,has an offset segmental circular bearingend, and. the usual type-head c; The hanger has` a body G, made of sheet metal of uniform thickness throughout, which connected to the .type-pv bar by two sheet-metal side plates gfriveted to opposite sides of the body of the hanger. and pivotedt o. the oset end of the typebar, which eXtends .inA between .the side plates. A The type-bar is stamped fromstock slightly lighter body of the hanger, andthe side plates are.. preferably stamped from stock considerably.

than that employedfor thef lighter than that of the type-bars. After the several parts of the hanger and bar are stamped and provided with the holes for the rivets h and pivot h, Figs. 3, 5, and 6, by which they are connected, they are pressed to flatten them approximately, and then the side lates and type-bar are hardened, after whicli all of the parts are ground to gage. The outer faces of the side plates g do not have to be ground, but the grinding of their inner faces and the opposite faces of the bar and body of the hanger affords smooth bearin -surfaces for the bar and insure that exact thickness of the bar and body of the hanger which will ermit the bar to vibrate freely without si e motion. Sheet metal cannot always be had of the exact gage desired, and as there is more or less distortion of the metal in hardening the rinding is almost imperative if the best resu ts areto be secured. The pivot h', on which the type-barvibrates, has reduced ends and anv enlarged central portion of a length equal to the. thickness of the body of the han er or slightly lon er than the thickness o the type-bar. T e shoulders thus formed prevent the side lates from being closed in and pinching t` e t e-bar in rivetin the ends of the pivot. n assembling tiie parts the pivot is first placed in the hole in the typear and then with the bar placed between tlie side plates g. The side plates are then applied to the hangerand secured by the two rivets h, the ends of the pivot being also headed to permanently con- -nect the type-bar and hanger and prevent the ivot from turnin in the hanger.

T e inner end of t e body of the hanger preferably extends forwardly at i/between the side plates, so as to overhan and form a cover for the pivoted end of t e type-bar.

v This extension not only forms a very complete guard to exclude dust and foreign matter from the pivot-joint, but also prevents the side plates from being sprung in against the type-bar when the are riveted to the body of the hanger. T e advantages in this construction are that there are no adjustable parts to work loose, and owing to the exactness with which the parts can be made and to the hardenin no adjustment is required. The complete anger can be made of a thickness no greater than the type-head, thus enabling a close build. The han er has an imortant advantage over a fo ded or bent hanger in that the sides can be ground true and smooth after hardening, and a shouldered pivot can be employed, which is not the case with a folded hanger. The construction described roduces an extremely perfect and serviceable bearingthat occupies the minimum s ace, and it can be made at less expense t an others of com arative merit.

The outer ends of the angers are preferably seated inradial slots in ribs c on the rear side of the segment and are secured there- Giacca in by a thin flexible segmental plate 7c', bearing against the back edges of the hangers, and two rows of screws k2, passing through holes in the securing-plate and between the hangers into threaded holes in the segment. When the screws are tightened up, the hangers are clamped firmly between the segment and the securing-plate. By loosening the screws at opposite sides of a hanger it can be withdrawn from its scat or adjusted lengthwise therein without detaching the securing-plate or other hangers.'

Figs. 9 and 10 show a reversal of the typebar and hanger construction just described, in which the side plates g are riveted to the type-bar and the pivot oscillates in the hangen The type-bar has a tail or extension i, forming a cover over the pivot-bearing. This construction is desirable; but the type-bar is slightly heavier than in the construction first described.

The surface contact between the type-bar and hanger can be reduced, if desired, by forming a shallow circular groove l, Figs. 1 and 5, concentric with the pivot in the opposite sides of the type-bar, or, as shown in Fig. 9, by forming circular grooves Z in the opposite faces of the-hanger. The grooves can be produced by the dies that are used to flatten the type-bar and han er before the parts are hardened or in any ot er suitable way.

The auxiliary levers F are preferably located in the same lane in substantially upright position and) about right angles. The portions of all of the auxiliary levers below the key-levers are of equal length, while the portions thereof above the key-levers are of the graduated lengths required to locate their upper ends at the' same distance from their type-bars on the curved segment and are deflected toward the center of the se ment (see Fig. 2) to intersect the radial p anes in which the typebars swing. The upper ends f2 of the levers are bent so as to stand in such radial planes so that the links f can extend in strai ht lines cross the key-levers at IOS between the auxiliary levers and t e typebars and be connected to the same by parallel pivots. links shown can be employed between the auxiliary levers and the type-bars.

The lower ends of the auxiliary levers are preferably seated in slots in a bar m, by which they are held laterally in place and are pivoted on a rod or wire m', seated in the slotted bar. The levers have open-ended narrow slots m2, and the pivot-wire m has fiattened sides, thus enabling the detachment ofthe levers from the wire when turned to a position in which the sides of the slots 'm2 and flat sides of the pivot-wire are parallel. When the parts are in the position shown'in the drawings, the auxiliary levers can swing on- Connections other than theA The connections between the keylevers and auxiliary levers are vpreferably formed bypinsn, securedto one set of levers end riveted to the key-lever, a central enlarged portion, which enters the slot n', and a head, which prevents the accidental disengagement of the p in from the slot. One end of -thelatter is, however,enlar` ed `to-allow the passage ofthe pin-head, so t at' the aux` l iliary lever F can b e detached from its pivotwire and key-lever, thus permitting each type-,bar and its hanger, auxiliary lever, and link f, which are permanently connected, to be removed from the machine without disturbing the key-levers. As the auxiliary 'levers are of graduated lengths and the keylevers of different lengths, the slots n in the auxiliary levers differ sli htly in length and form to insure an equal 'p of the keys and the same movement of the type-bars. vThe slot n', which must incline relative to the path of movement of thepin n, may be straight or: curved, as desired; butl as a straight slot: produces afnearly uniform motion of-theauxiliary lever and type-bar,

-while an accelerating motion of the type-bar' .is most desirable, the Aslot is preferably curved, as shown, thereby causing-a slow` i starting Vand gradually-increasing movement slot is of irregular curvature,

f levers.

`pull on the type.

endfor the linkj,

ofthe auxiliary lever and type-bar. The

its upperportionbeing curved on a smaller radiusthan its lower portion. The slots for the shorter levers are curved on a larger radius and are of; greater length than those for thelonger lAnother and important advantage of the curved slot is that its upper part rests against the pin n at a suitable incline to ordinarily prevent the rebounding of the typebar-'and yet avoids ythe lost motion which would r'e'sult if the slot were arranged at such inclination as to inake a positive lock for the type-bar-when' in its normal position. By slightly varying the form of the slots n different desired motions of the type-bars can be produced-such,for instance, as a uniform motion from start to inish,diiferent accelerated motions, or an accelerating motion from the startnearly to the printing-point By proper formation of :the-.slot itis possible to release the type-bar :before it reaches the printingpoint, so that it can make the impression from its momentum aloneand also to permit the key-levers to start before exerting any The auxiliary lever is preferably made substantially straight,fwith the slot intersecting ay straight line connecting the supportingpivot for the lever and the pivot at its upper and when so arranged the levers vibrate directly over their supportingment of the lin s 4 on the levers.

. if', connecting the upper ends of the pivot-s, causin a nearly horizontal moveand preventing side stress T e slots n could all be made alike-and the uniform dipof the" key-levers and movement of the type-bars secured by .making the auxiliary levers of the required len ths;

but such construction is not so desira le on account of-themore complicated pivotal arrangement for the levers which would be re uired.

Figs. 9 an 10also illustrate a modified arrangement ofthe parts of the type-bar action in which the hangersG are secured tothe front side of the segment D,and the links auxiliary vers F and type-bars C, extend forwardly from the levers and are attached to the upper edges of the type-bars andmove the typebars by the rearward movement of the auxiliaiy levers. v This. arrangement is more desirable for machines in which the segment is shifted: instead ofthe platen to print the different-case characters; The key-levers E in this arran ement are pivotedto the frame in the same l(lr'lori'zontal plane as the pins connecting themv to the auxiliary levers, and when so located the type-bars are Vlocked in their normal position. The construction Jshown in Fig. 1, in which the key-levers are pivoted below the plane of their connections with the .auxiliary levers, is deemedvpreferable, as the type-bars will not be posltively locked'in their normal position, and the pivots for the auxiliary levers can be located directly below the pins connecting themwith the key-levers, which allow theupper ends of the auxiliary levers and links f to swing more nearly in horizontal lines. j It will be observed that both the key-le-A vers and auxiliary levers are substantially4 straight-that is, they are not angular' or belli crank levers, but are simple levers, one of the second class and the other of the third class. rl`he sliding connection between the levers transmits themotion of the key-lever by an inclined `plane andfis very different from the crank action of apin-and-slot connection be- ,tween pivoted levers in which the slot is only provided to allow of the movement of "the pin, which is .necessitated by the fixed pivots of the levers.

yVire claim as our invention- 1. The combination in a `type-writing machine, of a pivoted type-bar, a key-lever pivoted at one end, an auxiliary lever pivoted at one end and operatively connected at the opposite end to said type-bar, said levers crossing' each other, a projection on one of said levers, and a surface on the other lever which is slidably en aged by said projection and 1s curved in suc relation to the path of movement of said proj eetionas to cause an accelerated movement of the type-bar, substantially -as set forth.

2. rihe combination in a type-writing ma,-

IOS

IIO

chine, of a type-bar pivoted to'sWing upwardl and rearwardly, a substantially horizonta key-lever pivoted at one end, an upright auxiliary lever pivoted at its lower end and operatively connected at its upper end to said type-bar, said levers crossing each other between their ends,'a pin on one o f said levers, and said other lever having a slot of irregular curvature in which said Ipin slides, substantially as set forth.

3. The combination ina type-writing machine, of a frame, a series of t e-bars, a series of key-leversl extending un er the typebars and pivoted at their rear ends, a series of upright auxiliary levers operatively connected at their upper ends to the type-bars and to the frame at .their lower ends, said levers crossing between their ends, and pin-andslot conne'ct1ons betweenthe two series of levers, the slots being curved, and the curvature being on a smaller radius at the upper ends ofthe slots, substantially as set forth. 4. The combination in a type-writing machine, of a frame, a -series of pivoted type.

bars', a seriesof ke -levers pivoted at one end, a series of auxi iary levers of graduated lengths crossing said key -levers between their ends and operativelyl connected at one end to the type-bars and pivoted at their otherrv ends to the frame, and pin-and-slot connections between the two series of levers,

the slots bein of different form to compensate for the ifferent lengthsof the levers, substantially as set forth.

.5. In atype-writing machine, the combination of a series of pivoted type-bars arranged to swing upwardly and rearwardly, a series of key-levers extending rearwardly under the type-bar tpivots, aV series of upright auxiliarylevers o the third class fulcrumed at their lower ends below the key-levers on horizontal pivots and extending vertically to points a ove the key-levers, sliding connections between the key-levers and auxiliary levers consisting of horizontal pins on one series of levers engagin curved lnclined faces on the other series o' levers, and connections between thel upper portions of the auxiliary levers and the type-bars, substantially as set forth. f

6. In a type-writing'machine,fthe combination of a series of type-bars pivoted in a vertical arc to swing upwardly and rearwardly, a series of key-levers of different len ths extending beneath the type bars an pivoted at their rear ends, a series of upri Vht auxiliary levers of graduated lengths fu crumed below the key-levers on thesame horizontal axial line and extending above the key-levers andl connected at their up er ends to the type-bars, ins secured to sa1d)key`le vers in substantia ly the same horizontal line and engaging in slots in said auxiliary levers, said slots being of different shapes whereby equal movements of the key-levers willv produce equal and accelerating movements of the upper ends of said auxiliary levers and type-bars, substantially asset forth.

7. The combination in a type-writing machine, of a series of type-bars plvoted in a vertical segment to swing upwardly and rearwardly, a series of key-levers extending rearwardly under,` the type-bars, a series of up- /ri ht auxiliary levers supported by horizon# t5 pivots at their lower ends below the keylevers and extending vertically to points above the key-levers, then on converging lines to the. intersection of the radial planes in which the type-bars swing, and having their upper ends arranged to stand in such radial p anes and operatively connected to the typebars, and slot-and-pin connections between the two series of levers, substantially as set forth.

8. The combination in a type-writing machine, of a frame, aseries of type-bars radially pivoted in a vertical segment to swing upwardly and rearwardl a series of key-levers extending rearwar ly underthe 4typebars and pivoted at their rear ends, a series of upright auxiliary levers of graduated lengths having their upper endsoperatively connected to the type-barsby links and pivots ar chine, of a frame, a series of radial type-bars arranged to swing upwardly and rearwardly, a series of key-levers of the lsecond class exxtending rearwardly under the type-bars on substantially horizontal arallel ines, a series of upright auxiliary evers of graduated len ths operativel connected at tLeir upper en s to the typears and havin slot and horizontal pin connections with t e key-levers between their ends, and horizontal pivotal connections between said auxiliary levers and the frame directly under. the pinand-slot connections with the key-levers, substantially as set forth.

10. The combination in a t pe-writing machine, of a type-bar body an hanger-body of slightly-diiferent thicknesses, but each ofuniform thickness throughout, and separate connecting-plates arranged on op osite sides of said type-bar and hanger bo ies, said connecting-plates.- being ri idly secured to the thicker body and pivota 1y connected'to the thinner body, substantially as set forth.

. 11.r The'combination in a type-writing machine, of atype-bar body and hanger-body of slightly-different thickness, and separate connecting-plates arranged on op osite sides of said type-bar and hanger bo ies, said con- ICO IIO

thicker body, and a pivot for the thinnerl body consisting of a rivet joining said p lates and having shoulders to hold said plates 5 spaced apart a distance equal to the thick# ness of the thicker body, substantially as set forth. l

. 12. The combination in atype-Writing machjne, of a t pe-bar and hanger consisting of lo a pair .of in ependent opposable side plates, a type-bar body, and a hanger-bod between the side plates, one of said bo 'es being shaped to overhang the other body to eX- clude dust, substantially as set forth.

I5 13. The combination in atype-writing machine, of a type-bar and han er consistingof a pair of independent opposa le side lates, a

type-bar body, and a han er-body etween' the side plates, one of sai bodies having a zo segmental circular part oscillating between the side plates and the other body forming a bridge over said oscillating part between the side plates, substantially as set forth.

14. The combination in a typewriting machine, of a type-bar and han er consisting of a pair of independentopposa le side plates, a.'

type-bar body, and a hanger-body between the side plates, one of said bodies being formed to overhang the other part between the side plates, and the side plates'being shaped to conform to said overhanging part, substantially as set forth.

Witness 0i1r hands this 22d day of April, 1905. H

HARVEY A. Moran. EMMIT G. LATTA;

Vl/'itnessest'v FRANK B. SWART, FRANKE.r REID.

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