US1220283A - Type-writing machine. - Google Patents

Description

J.SOKOLQV. T'YPE WRITING MACHINE. APPLICATION FILED JAN. 24. I914.

1 20,283 v Patented Mar; 27,1917.

"EJNITE. srarns rnrniv o FioE JACOB soKoLov, on NEW YORK, N. Y., 'AssIeNoR T0 UNDERWOOD rvrnwnrrnn COMPANY, on NEW YORK, 1v. Y., A CORPORATION or DELAWARE.

TYPE-WRITING MACHINE.

- Specification of Letters Patent. Patented Ma 27, 1917,

a Application filed January 24, 1914. Serial No. 814,024.

To all whom it may concerns Be it known that I, JAooB Soxonov, acitizen of the United States, residing in the borough of Bronx, in the county of Bronx, city and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to line-spacing mechanism of revoluble platen typewriting machines, and applies to the classof machines in which a yielding device is provided for line-spacingthe platen, the object.

of this yielding connection being to prevent a too sudden rotation of the platen by the operator.

According to the present improvements, the line-spacing handle is in the form of a lever, which is pivoted upon'the paper carriage of the typewriter, and is connected by a yielding device to an arm which may be mounted upon the same pivot as the lever, said arm being connected to the line-spacing pawl to drive the latter. Upon the operation of the line-spacing handle, the con necting spring. will yield during the first part of the stroke, and in due time will operate said pivoted arm and drive said pawl. Thus by a simple construction, easily applied to an Underwood typewriting machine, the advantage is gained of preventing tooorapid rotation of the platen.

The pivoted arm above referred to, preferably hasan extension, in the form of a segment of a tubular. anchor-ring, which serves as a housing forthe coiled transmis sion-spring, which is compressible by the line-spacing lever.

The pivoted arm above referred to occupies the same position, in the typewriting machine as the arm which usually engages the pawlcarrying slide, the arm being pivoted upon the carriage and said slide being shiftable up and down for permitting capital and lower case letters to be written. This relation between the'arm and pawl-carrying slide is preserved in the present invention, and thus it will be seen by using the same pivot screw as before, and without. any

change in the machine, a yielding connection may be employed for the purpose speci- Other features "and advantages willhereinafter appear.

In the accompanying drawings,

Figure 1 is aperspective view of the left end of a platen frame and its carriage, to which my invention is shown applied.

Fig. 2 is a top plan view of the line space lever and the line space mechanism, in their normal positions, when at rest. I

Fig. 3 is a view showing how the compression spring is engaged within its housing by means of a pin extending from the line space lever; r

Fig. 4 is a view similar to Fig. 2, but

also fixed upon the axle. This line space wheel is driven by a pawl 6 pivoted on a plunger 7, each time the latter is operated by line space lever 8, which is pivoted by a screw 9 upon the carriage 3. 7 An abutment .10 on the latter is struc by the line-space lever, at the completion.

pawl about to feed the line omitted, to show of the line-spacing operation, to return the carriage. I V

To avoid the effect of" a powerful blow,

Ihave provided a yielding connection be-' tween the line-space lever and the linespacing pawl. This also-prevents the stop 11 frombeing battered by the pawl.

This connection comprises a coil spring 12, which is contained ina-tube' 13 attached to an arm 14 (also pivoted on the screw 9), which engages and forces back the linej spaceplunger 7, when the said spring is sufficiently compressed. r

The'driving of the. spring 12 is effected by a pin or stud "15, which is fixed in the line-space lever, and extends througha'slot 16in the tube l3, so that when the lever is swung to the right, the pin will force back the spring 12, until there is suflicient tension in the latter to cause the arm 14 to drive back the plunger 7, and line-space the platen.

The spring may be constructed so as to acquire the strength needed to linespace the platen, only when the line-space lever 8 is almost against the abutment 10.

After each operation, the plunger 7 is returned with the feed pawl 6 by a spring 17, which also forces back the arm 14, and

the line-space lever 8 is carried to the left toward an abutment 18, on the carria e 3, by the reaction of the spring 12.

It will be understood that the spring 17 acts through the slide 7 to return to normal position both the pivoted arm 1% and the handle or lever 8. The coiled compression spring 12 tends always to swing lever 8 in one direction, and the arm 14: in the other direction; and this effect is limited by a lug 19, which is engaged by the arm 14. When the handle 8 is released, the spring 12 expands until lug 19 strikes arm 14; and the spring 17 returns the members 8, 1th to normal positions, Fig. 2. There is room for a little play of the handle 8, so that arm 14 may not rub against slide 7 as the latter shifts up and down with the platen frame, to enable the different types to print. It will be seen that the arm 1% is in position to engage slide 7, whether the latter is up or down. The parts 8 and it may be assembled on a single screw 9, which may occupy the same position on the typewriter carriage as is usually taken by the linespace lever pivot-screw; so that no alteration needs to be made in the typewriting machine, in order to introduce the advantage of a yielding connection between the line-space handleand the platen;

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

Having thus described 'my invention, I claim: 7

1. The combination with a shiftable platen frame, of a carriage in which said platen frame is mounted, a lever on said carriage, an arm also pivoted on said carriage, a yielding connection between said lever and said arm, a line-spacing mecha-" nism mounted upon said shiftable frame to be operated by said arm in either of the shift positions of said platen frame, said arm being mounted concentrically with said lever, and a stop on said lever to hold said arm out of position to interfere with the shifting of the line-spacing mechanism.

' 2. The combination with a line-spacing pawl, of an arm to drive the same, a lever or handle pivoted concentrically with the arm, a compressible spring between said arm and said lever to drive the onebythe pawl, of an arm to drive the same, a lever or handle pivoted concentrically with the,

arm, a compressible spring between said arm and said lever to drive the one by the other, means to limit the stroke of said lever, means to limit the stroke of said arm relatively to said lever and thereby hold said arm out of operative relation to said pawl while the lever is in its initial position, a curved slotted housing for said spring arranged between said arm and said lever, and a pin extendinginto, the slot to engage the spring and complete the connection between the arm and the lever.

l. In a typewriter, the combination with a carriage and a platen carried thereon, of

a line-space mechanism for rotating the platen, a manually operable lever therefor pivoted on said carriage, said lever also Serving to return said carriage after a line 'of writing, a pivoted arm extending transversely to said lever, a curved tube attached 5% thereto, a spring contained in said tube between the lever and arm and energizedby said lever while returning said carriage, to operate the linespace mechanism through said pivoted arm, said spring being held by said tube perpendicular to the lever and arm respectively at its points of engagement therewith, and a stop controlled by said lever to hold the said arm free from the line-space mechanism while the lever is in its initial position.

5. In a typewriter, the combination with a carriage, a shiftable' frame thereon, and a platen mounted in said frame, of a' linespacemechanism for rotating the platen, a. manually operableline-spacing lever pivot ed on said carriage, said lever also serving to return said carriage after a line of writ- 7 ing, an arm pivoted on'said carriage, a guide carried by said arm, a spring positioned and? guided by said guide, means on said lever having a running' connection with said guide andoperab-le to compress said spring, and

thereby cause the springto actuate the linespace mechanism, and means on'said lever to limit the throw of said arm relatively to the lever by said spring and thereby holdthe arm free from the line-space mechanism- 7 position of rest, to prevent binding between ,said arm and the line-space mechanism on the shiftable platen frame.

while the lever is in its initial or normal 6. The combination with a platen frame, V

of a carriage in which said platen frame is mounted and shiftable to upper and, lower,

case positions, a line-spacing mechanism 7 means to change the direction of a forceapplied at said lever in the direction of the carriage travel to a direction perpendicular thereto at said arm, and means limiting the movement of said arm relatively to said lever to hold the arm free from the linespace mechanism while the lever is in its normal position of rest and thereby prevent binding of the arm with said lino-space mechanism.

7 The combination with a carriage and a platen thereon, of a line-space mechanism on the carriage, a lever on the carriagemovable about its pivot in the direction of the carriage travel for operating the line-space mechanism and returning the carriage, mechanism intermediate said lever and said line-space mechanism comprising an arm movable transversely to the direction of the carriage travel for operating the line-space mechanism, a buffer spring between said lever and arm, said spring arranged in an arc with one end bearing against and nor mal to said lever, and the other end bearing against and normal to said arm, and means for supporting and guiding said spring.

8. The combination with a carriage, of .a platen frame and platen shiftable up and down on the carriage to upper and lower case positions, a line-space mechanism shiftable up and down with the case-shifting of the platen frame and platen, a line-space lever mounted on the carriage and comprising a handle movable relatively to the carriage substantially in thedirection of the carriage travel to actuate the lever, an arm on the carriage movable transversely to the direction of movement of the carriage to actuate the line-space mechanism, a buffer compression spring guided in an are between said arm and lever, said spring operable to transmit power from said lever to said arm for actuating the latter, and means on said lever to limit the movement by the spring of said arm relatively to said lever, and thereby hold the arm out of position to interfere with the case-shifting movement ofthe linespace mechanism when the lever is in its normal position of rest.

9. The combination with .a shiftable platen frame, of a carriage in which said platen frame is mounted, a lever on said carriage, an arm also pivoted on said carriage, a yielding connection between said lever and said arm, and a line-spacing mechanism mounted upon said shiftable frame to be operated by said arm in either of the shift positions of said platen frame, said lever having means to hold said arm in position to prevent interference with the shifting of the line-spacing mechanism when the said lever is in its normal position of rest.

JAGOB'SOKOLOV. Witnesses:

TITUS H. IvoRs, F. E. ALEXANDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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