US1570988A - Typewriting machine - Google Patents

Description

' Jan. 26, 1926.

E. E. BARNEY TYPEWRITING MACHINE Filed July 29, 1924 INVENI'OR 1% Z f3 WITNESEES ATTORNEY Patented Jan. 26, 1926.

UNITED STATES PATENT OFICE.

EDWIN E. BAR/HEY, OF NEW ROCHELLE, NEXV YORK, ASSIGNOR TO REMINGTON TYPE- WRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWBITING MACHINE.

Application filed July 29, 1924. Serial No. 728,809.

To all whom it may concern:

Be it known that I, EDWIN E. BARNEY, citizen of the United States, and resident of New Rochelle, in the county of Westchester and State of New York, have in vented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

My invention relates to typewriting or like machines and more particularly to the case shift mechanism thereof.

The main object of the invention, general- 1y stated, is to provide means for counteracting the weight of a substantially horizontally shiftable case shift frame and the parts carried thereby, whereby the shifting operation is rendered lighter and is more easily effected.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts, and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawing, wherein like reference characters indicate corresponding parts in the different views,

Figure 1 is a fore-and-aft vertical sectional view of a portion of a typewriting machine embodying my invention.

Figure 2 is an enlarged detail fragmentary sectional View of a portion of the con struction, the section being taken on the line 2-2 of Fig. 1 and looking in the direction of the arrow at said line.

Figure 3 is a sectional view of the parts shown in Fig. 2, the section being taken on the line 3-3 of Fig. 1 and looking in the direction of the arrow at said line.

Figure 4 is a detail fragmentary fore-and aft sectional view showing the parts as they appear when the case shift frame is in the shifted position.

My invention has been designed, in the present instance, to improve the Remington portable machine, the case shift mechanism of which is disclosed in the patent to Herbert E. Bridgwater, No. 1,442,792, dated January 23, 1923, and to effect such improvements without materially modifying the structural features of said machine as they now exist. It should be understood, however, that the invention is not restricted to embodiment in such machines but may be employed in typewriting or like machines generally where the case shifted part recelves substantially a horizontal shifting motion.

The frame of the machine comprises an inner frame which includes side plates 1 suitably united and supporting various working parts of the machine. This frame is received within an outer sheet-metal frame 2 in which the inner frame is fixed. The case shift frame is received between the side plates 1, and comprises sheet-metal side plates 3 pivoted at their forward ends, as at 4, todepending links 5 pivoted at their upper ends on studs 6; the links being held in place on the stud 6 by cotter-pins 7. Stops 8 are secured to the side plates 3 of the shift frame and co-act with adjustable stops 9 carried by the side plates 1 of the inner frame. Each side plate 3 carries an inwardly bent flange 10 to which is adjustably secured by screws 11 a carriage support 12. Upwardly projecting arms 13 are pivoted at 14 to the depending lugs 15 on the carriage support. The lower ends of the arms 13 are secured to the rock shaft 16 which extends transversely across the machine and is mounted at its ends in the side plates 1 of the inner frame. The arms 13 thus pivotally support the member 12 which constitutes a part of the substantially horizontally shiftable case shift frame. A carriage 17 a portion of which is shown in Fig. 1, is mounted on the carriage support in the usual manner and supports a c lindrical platen 18. The usual type bars (not shown) of the Remington portable machine are adapted to strike rearwardly and downwardly against the top face of the platen. A centrally disposed forwardly extending link 19 is pivotally connected at 20 to the case shift frame and extends forwardly from this point of connection to a crank arm 21 where it is pivoted at 22. The crank arm 21 is centrally disposed on and projects upwardly from a rock shaft 23 mounted at its ends in the side plates 1 of the frame. A crank arm 24 likewise projects upwardly and rearwardly from this rock shaft 23 and is provided with an anti-friction roller 25 at the rear end thereof. A depending projection 26 on a case shift lever 27 co-acts with the roller-25. The rear end of the case shift lever is fulcrumed at 28 to a fixed part of the machine and is provided at its forward end with a shift key 29. A

case shift lock key 30 is carried at the forward end of an angular lever 31 which is pivoted at 32 to the case shift lever 27. The locking lever 31 has a hook-like engaging end 33 adapted to co-act with a locking member 34 carried by the forward slotted guide plate 35. The case shift lever 27 described is at the left-hand side of the machine, and a corresponding case shift lever is also employed at. the right-hand side of the machine to co-act with an associated crank arm 24, the last mentioned shift lever however being devoid of a locking key. It will be understood that a depression of the case shift key 29 is effective to rock the shaft ..3 shifting the link 19 rearwardly and effecting a rearward substantially horizontal shift of the case shift frame and carriage from the Fig. 1 to the Fig. 4 position. The parts as thus far described are substantially the same as those disclosed in the hereinbefore mentioned Bridgwater patent, the pres-- ent arm 21 being shorter than that former-- ly employed.

In accordance with my invention 1 secure an auxiliary bracket 36 to each of the flanges 10 at opposite sides of the shift frame by spot welding or otherwise, each bracket extending downwardly and rearwardly from the flange to which it is secured. The lower end of each bracket 36 is apertured at 37 to receive the lower end of a contractile suspension spring 38. Each suspension spring extends upwardly and outwardly from 1ts connection with the associated bracket 36 to a connecting hook 39 on the companion bracket 40 secured by spot welding or otherwise to a side plate 1 of the frame. It will be understood that the force of the contractile springs 38 is directed upwardly and outwardly towards the side of the machine against the case shift frame and the parts carried thereby. It will be seen, moreover, that these springs are located near the rear end of the case shift frame beneath the car riage support and the carriage carried thereby, where the springs are most effective to counteract the weight of the carriage and the rear end of the case shift frame where the latter is pivotally mounted on the supporting arms 13. hen the case shift frame is in the normal position, the springs 38 are disposed as represented in Fig. 1, where the contractile force thereof is effective to exert an upward and outward pull 011 the rear end portion of the case shift frame and the parts supported thereby and thus tend to counteract the weight of such parts. It will be seen that in the Fig. 1 position the springs 33 exert but little if any force tending to return the case shift frame and the parts carried thereby to normal position; operating merely at this time as springs to counteract the weight of the case shift frame and the parts carried thereby. lVhen, however, the carriage is shifted rearwardly, as indi ated in Fig. 4, the lower ends of the springs 33 are shifted with the shift frame around the points 39 where the upper ends of the springs are connected to the fixed frame of the machine. While the force of the springs 38 is at all times directed in the main upwardly to counteract or counterbalance the weight of the carriage, they nevertheless exert a slight forward as Well as upward pull when the carriage is in the shifted position shown in Fig. 4. The forward pull thus exerted by the springs 38 tends to return the case shift frame and the carriage to normal position. However, the force of the springs 38 is insufficient to offectively attain this last mentioned result by reason of the fact that the springs when at or near the Fig. 1 position exert but little if any forward stress on the case shift frame. I therefore deem it desirable in practice to employ additional contractile carriage re turning springs ll, one at each side of the machine, and each connected at its rear end to a pin 42 projecting inwardly from the companion side plate 3 of the shift frame. Each spring 41 extends forwardly and slightly upwardly from this point of conncction to a stud 4-3 carried by the companion side plate 1 of the frame, and formed as an extension on one of the rivets which is ordinarily employed to provide a pivot for one of the adjustable stops 9. The force of the springs ll is directed in the main to exert a forward pull with a slight upward incli nation on a case shift frame, thus effectively returning the frame to its normal position.

It will be seen that the suspension springs 38 act to support the rear or heavier end of the case shift frame with the carriage support and the carriage and other parts mounted thereon, and that although the arms 13 guide this end of the frame the springs 38, nevertheless, in the main sustain the weight of such parts, thereby relieving the pressure exerted by the operator on the shift keys and rendering the shifting operation lighter and more agreeable to the touch.

The force of the springs 38 is directed in the main upwardly againstthe case shift frame, and accomplishes this last mentioned result, whereas the slight inclination of the springs from their lower ends to their fixed points of connection at the sides of the machine tends to maintain the case shift frame centered between the side plates 1 of the main frame. This same inclination of the springs 38 enables me to provide longer springs than would be the case if the springs were arranged directly up and down in substantially vertical positions, the provision of longer springs at these points being highly desirable.

In order to prevent the springs 38 from shifting downwardly from their hook-like engaging portions 39 on the brackets 40, I preferably slope the side walls of the brackets outwardly from the parts 39, as indicated at 44, in order to provide engaging shoulders that prevent the upper end of the springs from slipping down on the brackets.

From what has been said it will be understood that the very simple arrangement of the springs enables me to accomplish the highly desirable result of materially lightening the touch in operating the case shift mechanism and that very slight changes are required in the construction of the Remington portable machine in order to embody my invention therein.

lVhat I claim as new and desire to secure by Letters Patent, is

1. In a typewriting or like machine the combination of a case shift frame mounted for substantially horizontal case'shift movements fore-a-nd-aft of the machine, a carriage carried by said case shift frame near one end thereof, and contractile suspension springs on opposite sides of said shift frame near the carriage supporting end thereof, each spring being connected at its upper end to a fixed portion of the machine and extending downwardly and inwardly therefrom to its point of connection with the case shift frame.

2. In a typewriting or like machine, the combination of a case shift frame mounted for substantially horizontal case shift movements for-and-aft of the machine, a carriage carried by said case shift frame near one end thereof, contractile suspension springs on opposite sides of said shift frame near the carriage supporting end thereof, each spring being connected at its upper end to a fixed portion of the machine, and extending downwardly and inwardly therefrom to its point of connection with the case shift frame, and one or more additional springs for returning the shift frame from its shifted position.

3. In a typewriting or like machine, the combination of a main frame, a case shift frame, means for supporting and guiding said case shift frame for substantially horizontal case shift movement in the main frame, contractile suspension springs at opposite sides of the shift frame, each of said springs being connected at its upper end to the main frame, and extending downwardly and inwardly therefrom to its point of connection with the shift frame, and one or more returning springs exerting a force on the shift frame to move it forward and return it to normal position.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York this th day of July, A. D. 1924.

EDWIN E. BARNEY.

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