US1220892A - Type-writing machine. - Google Patents

Description

L. R. ROBERTS.

TYPE WRTNG MACHINE. APPLlcAnoN man neas, 191s.

Mmmm Mm'. 21?, 1911?..

iran lsai/.tras `arr oren;

LYMAN R. ROBERTS', OF RUTHERFOR'D, NEW J ERSEY, ASSIGNOR TO UNDERWOOD TYPE'- y 'WEITER CGIVIPANY, OF NEW YORK, N. Y., A CORPORATION OFDELAWARE. i

TYPEeWRITING MACHNE.

To all 'whom t may camera Be it known that I, LYMAN lt. ROBERTS, a citizen of the United States, residing in Rutherford, in the county or' Bergen and State of New Jersey, have invented certain new and useful Improvements in Type- Writing Machines, ofA which the following is a specification.

My invention relates to type-har actions for type-writing machines, and is an im. provelnent upon the invention disclosed in my co-pending application llo. 799,845, filed November 8, 1913. In said application the type-bar is provided with a slot in which works a pin on an actuating lever, the slot being open at one end to permit the actuating lever to he releasahly connected to the type-bar. l

in the present application the slot in the type-bar .is closed at both ends, thereby materially strengthening the type-bar; and in order to permit the pin on the actuating lever to he disconnectibly inserted in the slot in assembling the parts, said slot at its upper end is enlarged suflic'iently to receive the head of the connecting pin, said enlargement located beyond the normal path of travel of the pin in the slot. The type-bar may be readily removed by swinging it to an intermediate position. lifting it oliq its fulcrum rod and then sliding itdownwardly to bring said enlargement of the slot opposite the head of the connecting pin.

A locking surface at the end of the slot is constructed to engage the actuating pin and prevent the type bar from swinging upward independently of pressure on the key, thus preventing rebound of the typebars, and consequent interference or piling up of the keys. A stop on the type bar segment limits the movement of the har on its fulcrum, the elasticity of the bar permitting the type to be carried by momentum np to the platen, A more uniform and less violent action of the types is thus chtained, the types are preve ited from vibrating on the platen, and double printing or blurring is avoided.

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specification of Letters raient. pamnted Mar. 27, MMI?, Application filed December 6, 1913.

serii no. 8045957.

the parts being in their normal positions of i rest.

Fig. 2 is a similar view showing the posi-` tion of the partswhen the key is depressed.

Fig. 3 is an elevation view of the typebar segment. y

Fig. 4 is an enlarged detail view showingl i themeans for connecting and disconnecting the type-bar to andfrom its actuating lever.

fulcrumed at their rear ends on a rod 2 'and' provided at their forward ends with fingen pieces 3. Each key lever has a slot-and-piny connection l with a bell-crank lever 5 pivoted on a rod 6 and provided with a pin 7 working in a slot 8 formed in the shank of the type-har 9. The type-bars Aare ulcrumed on a rod 10 mounted on a type-bar segment 11, the type-bars being positioned in radiallyarranged slots 12 in the segment.

When the key is depressed, the bell-crank lever 5 which forms an actuator or driving arm for the type-har, is rotated and the pin 7 swings the type-bar about its fulcrum 10 from a horizontal or inclined position, (Fig. l) upwardly and rearwardly to a suhstantially vertical position in front or" the platen 13. During this movement of the type bar, the pin 7 has a continuous movement .along the slot 8. The lower end of the slot 8 is ,only slightly inclined to the direction of Figs. 5 and Gillustrate the vmethod of asmovement of the pin 7, so that the initial movement of the type-har relatively to that of the key lever is comparatively slow. As the type-barmoves upward, the inclination of the slot 8 to the direction of movement of the pin 7 gradually increases, resulting in an increase in the relative speed of the type-bar. During the iinal portion of the typelstrolre, the relation of the parts is such that a high speedof the type-bar is obtained.

The operation during the pivotal movementof the type-har about its' fulcrum 10 is substantially the same as that fullyset forth in my co-pending application above referred to and need not be further described here. n the 'present case, however,- `the pin 7 ,is not brought to/the upper end p of the slot 8 atihe compietion of the type s'trgke, andthe movement of the type-bar aboutits'dlcrum `l0 is limited by a rib 14v y on the se ent 11 which forms a stopfor the ty evars' when the type areashort distance rom the printing pointthe resiliency l of; the typeibar' permitting the type to complete thelrjstrokes by momentum, as indicated b dotted lines in Fi 2. 1

rnlhe ower end of the sglot Skis provided with a curved surface 15 transverse to a line joinin the pin 7 with fulcrum,thus form'- ving a ock for the type-bars to prevent them i form rebounding. Interference or piling up L yof the tybars in rapid Writing, owing to a reboun type-bar colliding-with an adjacent typeal', is thereby prevented.

The pin 7 1s provided witlua head 18 of -v greater diameter than the width of theslot rially weakened by the slot.

'"8 to prevent accidental separation ofthe type-bar and its actuator 5, the neck 17 of the pin working' freely in the' slot, but of suiicient'vvidth to prevent any material lateral play of the pin in the slot. The slot 8 is inclosed or completely .surrounded bythe type-bar so that the type-bar is not mate- 'loprovide for assembling or\ the type-bar, an enlargement 18 is formed at the upper end of the slot 8 through which enlargement thev head 16 can pass. The opening 18 is beyond the normal limit of movement of the pin 7 in the slot 8, as shown in Fig. 2.

The ful'crum rod y10 seats in a slot or recess 19 .formed by a hook 2O and opening outward through a neck or passage 9.1. In assembling-the type-bar, it is placed on the pin, the pin entering the slot at the opening 18 as shown in Flg. 5, and is then moved upwardly along the pin to the Fig. 6 posi- '.tion, to permit the ulcrum rod 10 to enter the throat 21, and thus allow the type-bar to be hooked on to the rod 10.` This operation is reversed in removing the type-bar, the latter being iirst swungvup to an intermediate position and then lifted over the fulcrum rodyO.

Variations may be resorted to within the scope ofthe invention, and portions of the improvements may be used without others.

HavingA thus vdescribed my invention, I

ts'olaim:

1. l'n a type-action, the combinationl of a type-bar having a hook, a fulcrum Aupon whichthe type-bar is detachably caught by means o f said hook, a key lever, and an intervening actuatorfor the type-bar, the latter provided adjacent to said hook with a shank having a slot closed at bothends, and a headed pin on said actuator working in ysaid slot andl movable continuously along the removing slot during the type-stroke, said slot formed with a locking surface at one end to lock the type-bar against rebound from its normal pos1tion of rest, and at its other end having an enlargement to permit the passage of the head of the pin for disconnecting the type bar from the actuator.

2. In a type-action, the combination of a; key lever, a type-bar provided 4with a closed transverse slot, and a driving arm operated `by the key lever and comprising a headed pin having a continuous sliding movement in said slot throughout the printing stroke, said slot formed to gradually increaselthe speedgof the type-bar relatively to that of thel keyI lever .throughout the printing stroke, said slot having an enlargement at l oneend beyond the normal range of movement of said pin to permit the passage of the head of said pin. for detachment, said type-bar havin a mparate open slot Whereby it is detaeha Jly mounted on its pivot, said slots being so related that the type-bar detaches lirst at one-slot and then at the other.

3. In a type-'action, the combination of a type-bar formed with a'slot entirely inclosed by the type-bar, and an actuator comprising a' pin working in said slot and having a head of greater width than the slot, the

slot formed with ,an enlargement through l which said head can pass in connecting or disconnecting the parts, said enlargement located beyond the normal limit of travel of the pin in the slot during the type-stroke said slot formed at the opposite limit o travel of said pin, with a locking surface to lock the type-bar against rebound -froin its normal position of rest, and said typeb'ar also having an open-slot construction for detachment from its pivot while said headed pin remains in its slot.`

4. In a'type-action, the combinationofl a pivoted type-bar, a key lever, and an inter-V ponent lever forming an actuator for the type-bar, the type-bar formed with a completely closed slot havin an enlargement at its upperend, and a .loc ing surface at the` lower` end to prevent rebound of the typebar, and a headed pin on said int'erpcnentl therefrom, to permit the detachment of the type-bar lfrom the fulcrum, said shank hav- :mamma inpasot @Rendim *transversal f of the; DQ- iizachment of the hook from the fucrum "V ylL at', 'alldsaid (vmg Mm having' :i headed while the lle-Med pin is between the ends of pm Wolmlg 1n said sot; szud slot formed h@ sot.

a ii'as 'app end. with an enlar'exfnen; t@ per LYe/AN R. ROBLJRTS. m12; etaclment of the typeal" from "che Jitnesses: u 1

,em pm. and so forium Wlbh matmn to ALEXANDER,

Said hook :n: 'o bermi th@ Erelimnar' de Typus E. LRONS..

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