US1370992A - Typewriter - Google Patents

Description

A. B. PARKER.

TYPEWRITER. APPLICATION FILED NOV. 28, 1919.

1 2 mm fi n- W 8 m2 m I 'Jvwutto'a ABlar/aer.

A. B. PARKER. TYPEWRITER.

APPLICATION FILED NOV- 28, 1919- 1,370,992. Patented Mar. 8, 1921.

2 SHEET$SHEE 2- A.B.Pa'rlzer.

nub woo PATENT OFFICE.

ALFRED IB. PARKER, 01 MONROE, LOUISIANA.

TYPE'WRITER.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed November 28, 1919. Serial No. 341,159.

To all whom it may concern: I

-Be it lmown that I, ALFRED B. PARKER, a citizen of the United States, residing at Monroe, in the parish of Ouachita and State of Louisiana, have invented a new and useful Typewriter, of which the following is a specification.

This invention relates to typewriters and more particularly to means whereby, upon the movement of a key or the like by the operator, the carriage of'the typewriter will be shifted back to its startin point and, at the same time, the platen wi 1 be rotated.

Another object is to provide mechanism of this character which is electrically operated and will not interfere in any way with the operation of the usual tension tape or band.

A further object is to provide mechanism of this character which will in no way interfere with the back and forth movement of the carriage as long as the electric current is not turned on.

Another ob'ect is to provide shock absorbing means W ereby injury to the machine due to the rapid movement of the carriage is revented.

other object is to provide mechanism of this character which will automatically cut out the current when the carriage is brought back to its initial position, the current remaining shut off until the operator again closes the circuit for the purpose of shifting the carriage.

lVith the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown:

In said drawings Figure 1 is a plan View of a portion of a typewriter having the present improvements combined therewith.

Fig. 2 is a rear elevation of the structure shown in Fig. 1.

Fig. 3 is an enlarged section through the connection between the carriage and the return mechanism.

Fig. 4 is a section through the combined shock absorber and switch.

Fig. 5 is an end view of the structure shown in Fig. 4.

Fig. 6 is a diagrammatical view of the motor and its controlling means.

Referring to the figures by characters of reference 1 designates the shiftable carriage of a typewriter which can be of any desired type. In the present instance this carriage has a bar 2 movable therewith on which are mounted adjustable sto blocks 3. Extending between these bloc rs is an arm 4 connected to the fixed portion of the typewriter structure and this arm constitutes the abutment for engagement by the respective stops 3, thus to limit the movement of the type writer carriage. Another bar 5 moves wlth the carriage and has a block 6 connected thereto and movable therewith, this block constituting a part of the attachment forming the subject matter of the present invention. As shown particularly in Fig. 3 a bore 7 is extended into the block 6 and mounted to move longitudinally of this bore is a rod 8 having a piston 9 secured thereto. A cushioning spring 10' is interposed between this piston and the closed end of the bore 7 and secured to one end of the rod 8 and close to the piston is a flexible tape or band 10 secured to and extending around a pulley 11. This pulley is journaled on pin 12 carried by a bracket 13 secured to one end of the carriage and another band 14:.is secured to this pulley and is wrapped therearound, this band 14 being extended forwardly and connected to the platen rotating lever such as commonly found at the end of the carriage and which has been indicated generally at 15, it being understood that this lever mechanism can be of any desired construction. The platen has been indicated at 16.

The other end of the rod 8 is connected to a band or cord 17 which is secured to a pulley 18 located at the right hand side of the machine and fastened to the shaft 19 of an electric motor 20.

Mounted in the upper portion of the stop arm 4 and in the path of the block 3 located at the left side of the carriage 1, when viewed from the front, is a piston 21 insulated from the wall of the bore 22 in the arm and provided with a rod 23 having a head 24: at one end and a spring 25 is located back of the head and constitutes a cushion and shock absorber. Thus the spring holds the piston 21 normally in a predetermined position. This piston may have a notch 26 in its periphery adapted to receive spaced contact strips 27 and 28 insulated from the arm 4 but normally connected electrically through the piston 21 as shown in Fig. 4-. One of these contacts is connected electrically to the motor 20' as shown in Fig. 6 through a conductor 29. Another conductor connects the" motor 20 to the other contact 27 and included in this conductor 30 is a key 31 located at a convenient point in the key-board and which constitutes a switch. The key is normally elevated so that the circuit to the motor from a source of electrical energy is normally broken.

It will be understood that when it is desired to return the carriage to its initial position the operator depresses the key 31 so as to close the circuit to the motor. The motor will be instantly started and will pull, through pulley 18 and connection 17 upon the rod 8. This will cause the piston 9 to compress the spring 10, and during this compression action the band or connection 10 will rotate the pulley 11 which, in turn, will pull through the connection 14 upon the platen rotating mechanism 15. Immediately after the rotation of the platen in this manner the continued pull of the connection 17 on the rod 8 will cause the block 6 to travel toward the right, carrying with it the entire carriage 1. As the carriage reaches the limit of its movement the stop 3 which operates to limit the movement of the carriage in this direction will come against the head 24 and compressed spring 25, thereby shifting the piston 21 off of the contact 28 and breaking the circuit to the motor even though the key 31 is still held de' pressed. This will cause instant stopping of the motor and at the same time thespring 25 will act as a cushion for absorbing the writer are depressed. Whenever it is desired to return the carriage it is merely necessary to depress the key 31, as hereinbefore described.

It is to be understood of course that various modifications may be made in the construction and arrangement of the parts to adapt the invention to different makes of typewriters.

What is claimed is The combination with a typewriter having a shiftable carriage, a platen, and mechanism for rotating the platen, of an electric motor, means under the control of the operator for energizing the motor, a connection between the motor and the platen operating mechanism for rotating said-platen by the actuating of the motor, a yielding connection between said connection and the carriage for returning the carriage to its point of starting after the actuation of the platen, a combined shock absorber and switch, and means movable with the carriage for engaging said combined 'shock absorber and switch to deenergize the motor when the carriage reaches said point of starting.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

ALFRED B. PARKER.

Witnesses WV. F. MILLSAPS, R. H. OLIVER, Jr.

Images