US1041556A - Type-writer action. - Google Patents

Description

J. ALEXANDER.

TYPE WRITER ACTION.

AJBPLIOATION FILED JUNE 22, 1911.

2 SHEETS-SHBET 1.

N E m a ll" WITNESSES I/WE/VTOR Patented Oct. 15, 1912.

J. ALEXANDER.

TYPE WRITER ACTION. APPLICATION FILED JUNE 22, 1911.

Patented Oct. 15, 1912.

2 SHEETSSHEET 2.

WITNESSES ATTORNEY 35 1 v varying the tension. The key lever carries a action.

- stud or suitable projection -arm.24 with a curvedbearing. surface 25 and useful Im UNITED STATES PATENT OFFICE. Y

JESSE ALEXANDER, or NEW YORK, iv. 31., ASSIGNOR or ONE-HALF r0 HUDSON BIDWELL, or vnw YORK, N. Y.

TYPE-WRITER ACTION.

Specification of Letters Patent.

Patented Oct. 15,1912.

Application filed June 22, 1911. Serial No. 634,705.

To all whom it may concern:

citizen ofthe United States, and resident of New York in' the county of Kings and State ofNew York, have invented certain new rovements in Type-Writer Actions, of WhlCh the following is a specification.

My invention relates particularly to a key and type. bar mechanism for a front stroke visible writing machine.

The object is to provide a light but strong and durable construction in which the touch is very light and yet in which greatpressure may be exerted when desired for manifolding etc. V i

7 Another object is to secure rapidity of The details of the invention are illustrated in the accompanying two sheets of drawings. Figural is a vertical section of a machine showing a side view of .one unit of a key and type bar mechanism embodying the improvements of my invention showing the parts in the position of rest. Fig. 2, is a perspective view of parts of the type bar mechanism separated. Fig. 3, is'a view similar to Fig. 1 showing the parts in the printing position. The keylevers such as 1 are all pivoted at the rear of the machine as for instance, on pivots such as 2 carried by the frame .3. Each key lever has an upwardly projecting finger 4 under tension of a spring 5. The latter is secured to the end 'ofa screw 6 which is adjustable in the frame of the machine for 7 for engaging the intermediate lever which will be hereinafter described.

The rear end of the type bar has an arm 16' carrying the roller 17 The type bar has a lug 18 for the pivot 11 and a. lug 19 for connecting to the intermediate lever 20.

' Theintermediate/lever 20 is pivoted at 21' and has a forwardly projecting arm 22 with a. slot 23 to engage the stud7 on the key lever. The upperend of the lever 20 has an -on its pivot 21.

e sed by the wall .and similar purposes. lever is released a short distance, the type adapted to cooperate with the roller 17 to start the type bar in its upward movement.

The intermediate lever also has an arm 26 with a slot 27. The link 28 carries a in 29 which fits in the slot 27. The link 28.1s ivotally connected to the lug 19 of the type bar by the pin 30.

When the key lever 1 is depressed the con "nection between the stud 7 and arm 22 causes "the intermediate lever 20 to be rocked The arm 24 moving forwardly presses the roller 17 and arm 16 of the type bar downward and forward and thus raises the type 13 to the printing position, the roller 17 rolling along the curved surface 25 of the .arm 24. Near the latter part of the movement of the type bar 10 the pin 29 carried by the link 28 is forcibly onof the slot 27 in the arm 26 and direct'pressure is brought to bear in atoggle-like manner to press the type against the platen 3.1. In Fig. 3 it will be noted that in the printing 21, arm-26, pin 29,- link 28 and pivot pin 36 are very nearly in a straight line with the type bar'lO. This enables me to secure a great amount of pressure for manifolding As soon as the key bar is free to fall back to its normal position of rest. A stop 32 may be provided on the face of the plate 12 to limit the-stroke of the type bar if desired. p

The carriage construction is not illustrated herein but may include a toothed rack such as 33to cotiperate with an escapement dog 34 pivoted at 35. This dog has the depending arm 36 connected at its lower end to a universal frame 37 having a universal bar 38 for engagement by the shoulders such as 39 on the intermediate levers. In this manner the control of the carriage and ribbon mechanism is effected through the me 'dium of the intermediate levers.

In the form shown I have illustrated a ribbon guide 40 connected to a bell crank lever 41 pivoted at 42. One armof this lever is connected by link 43 to the arm '36.

The arm 36 may be under the tension of a spring44 and in this manner resistance is offered to the movement of the ntermediate levers anda forceis provided for assisting,

position the pivot I 25 therefor,

in returning the intermediate lever and attached parts to their normal position of rest when released.

What I claim is v "3 1. In a key and type barmechanism, a pivoted key lever, a pivoted type bar, a pivoted intermediate lever connected to said key lever, a link connecting said intermediate lever and said type bar, said type 1' bar and said intermediate lever each having a projecting arm in rear of said link, said arms being adapted to cooperate with each other through a part of their movement.

2. In a key and type bar mechanism, a

' pivoted type bar having a-rearwardly and downwardly projecting arm and a lug located between the end of said arm and the printing end of said type bar beneath the type bar pivot, a lever having an arm for cooperating with said type bar arm through a part of its movement and a link connecting said lever and said lug on said type bar.

3. In a type bar action, a type bar, a pivot a roller carried by said type bar,

a pivoted lever having an arm for engaging said roller and a link connecting said arm and 'said type bar. 1

4. In a type bar action, a type bar, a pivot therefor, a roller carried by said type bar,

a pivoted lever having an arm for engaging said roller and a link connecting said arm and said type bar beneath said pivot.

' 5. In a type bar action, a type bar, a pivot therefor, a roller carried by said type bar, a pivoted lever having an arm for engaging said roller and a link connecting said arm and said type bar beneath said pivot and between said roller and the printing end of said type bar.

6. In a type bar mechanism, a pivoted type .bar having a downwardly and rearwarclly v8. In a type bar mechanism, a pivoted type bar having a projecting arm, a lever having an arm for engaging said pro ecting arm and a second arm havlng an elongated slot'and a link pivotally connected to said type bar and having a pin engaging in said slot. I

9. In a type bar mechanism, a pivoted type bar having a projecting arm, a lever having an arm for engagingsaid projecting arm and a second arm having an elongated slot, a link pivot-ally connected to said type bar and having a pin engaging in said slot, and a key leverforoperating said parts.

JESSE ALEXANDER.

Witnesses:

WARD W. SMITH,

Hnosoiv BIDWELL.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patenta.

Washington, D. G. v

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