US1711313A - Margin stop for typewriters - Google Patents

Description

April 30, 1929. M. GARBELL "1,711,313

mm STOP FOR TYPEWRITERS Filed May 16, 1927 2 sheotsshet 1 W; TNESi IN VEN TOR.

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April 30, 1929. I M. GARBELL 1,711,313

KARGIN STOP FOR 'IYPEWRITERS Filed May 16, 1927 2 Sheets-Sheet 2 Uh I III. I

4 Patented Apr. 30, 1929.

UNITED STATES 1,711,313 PATENT OFFICE.

MAX GARBELL, OF CHICAGO, ILLINOIS, ASSIGNOR '10 VICTOR ADDING MACHINE Coll IEANY, OF CHICAGO, ILLINOIS,

A CORPORATION on ILLINOIS.

MIARGIN STOP FOR TYPEW'RITERS.

Application filed May 16,

pivotally mounted tooth or pawl which may yield, when moved in one direction and engaged by an obstruction, but which is unyielding when engaged by an obstruction and moving in the other direction. Moreover, the rack-bar on which the stop is mounted is positioned to be swung away from the engaging obstruction wherebythe margin is released and the member on which the stop and bar are mounted may be moved additional spaces.

My invention contemplates the provision of a margin stop device which is simple in character, compactly made of minimum sized stampings and positive in looking action, all of which will. be better understood in connection with the accompanying drawings, in which drawings:

Figure 1 is a rear elevational view of afragmentary portion of a typewriter machine margin stop rack-bar having a margin stop mounted thereon;

Figure 2 is an elevational cross-section taken on line 2-2 of Fig. 1;

Fig. 2 is an end elevational view taken on the line 2 a of Fig. 1;

Fig. 3 is an elevational view of a modified form of stop device;

Fig. 4 is a top plan view of the device shown in Fig. 3; and

Fig. 5 is an elevational sectional view taken on the line 55 of Fig. 3.

Referring now more particularly to the drawings, a margin stop rack-bar 10 is provided with teeth 11 on its lower edge and has indicia at 12 positioned thereon. The margin stop device 12 comprises an integral stamping folded over on itself, as best shown in Fig. 2, so that when it is in operative relation it surrounds the rack-bar 10. A leaf spring 13 is positioned between the inner top edge of the stop member and the upper edge of the rack 10 thereby holding a tooth 14 in engagement with the rack 11 on the bar 10. This tooth 14 also forms a retaining member being bent out at ri ht angles from the side of the stamping as s own in Fig. 2

A knurled portion 15 is integrally formed on the stop member so that pressure thereupon compresses the spring 13 and permits 1927. Serial No. 191,576.

the stop member to be rocked downwardly around its rigid portion to disengage the tooth 14 whereupon the stop member may be moved along the rack-bar to some other predetermined position. The stamping when made is provided with a window 16 in which is positioned a pointer 17 adapted to cooperate with the indicia 1O on the rack bar.

I have found the above described margin stop very simple to make because of the novel manner in which it may be stamped out from a single piece of material and thereafter bent or folded and secured in the manner shown. Two downwardly extending lugs 18-18 are stamped out when the piece is formed and, as shown in Figs. 1 and 2, these lugs extend below the plane of the bottom edge of the bar 10 and serve as points of pivotal support for a finger 19. The latter is so shaped and mounted that it is yielding in one direction against a spring 20, but is unyielding in the other direction by reason of the manner in which the portion 21 thereof abuts against the inturned portion of the tooth 14.

The spring 20 is secured in position between portions 22, turned inwardly from the sides of the margin device, and another portion 23 which is turned over end-wise from the stamp ing. It will be understood that all of the portions to which I have referred except the finger 19 are integrally formed in one stamping, and that this simplicity of formation is one of the marked advantages of my invention.

As indicated, the finger 19 may yield when it is moved to the right and meets an obstruction, but is unyielding when moved to the left and meets a similar obstruction.

As intimated, the stop device is bent into form for placement on the bar 10 and, as best shown in Figs. 2 and 2 portions or lugs are turned in from the two sides to secure the member along the bottom of the bar 10. The portions which are turned in at the righthand of the margin stop form a double purpose in that they comprise not only a retaining portion but also the tooth portion 14.

In Figs. 3 to 5 inclusive I have illustrated a further embodiment of my invention wherein the rack 11 is positioned on the top of the machine stop-bar 10, the stop device 12 is here formed in somewhat similar manner but is provided with a different form of releasing mechanism to permit its-movement along the stop-bar. As shown here, the stop device comprises a portion 25 folded over as at 26 to straddle the bottom of the bar and having a folded-over portion 27 to straddle the top of the bar. Moreover, the portion 25 is provided with upwardly extending portions 2828 in which is mounted a portion 29 carrying the tooth 30. This portion 29 is spring pressed by the spring 31 mounted on the pivotmember 32 so that the tooth normally engages the rack 11. Extending outwardly from the member 25 is a finger-engageable portion 33, and integral with and extending in the same direction from the member 29 is a similar finger-engageable por tion 3 By grasping these two portions and pressing them together the action of spring 31 is overcome and the tooth 30 is lifted out of the rack 11 whereafter movement of the margin stop along the bar 10 is permitted.

A lug 35 is projected outwardly from the. bottomportion of the side 25 and a spring 36 is secured thereto. A finger 37 is pivotally mounted in 38 on don-'nwardly projecting portions 39 to be yieldable in one direction but unyieldable in another.

While I have described but two en'ibodiments of my invention and have explained certain advantages which may be utilized in connection therewith, it is obvious that many modifications may occur to those skilled in the art which do not involve a departure from the spirit of the present invention, and moreover, that many advantages are inherent in the device, and that all these latter may not have been explained, and therefore, I desire that my invention be limited only by the scope of the appended claim and the showing of the prior art.

I claim:

A. margin stop for a typewriter adapted to be moved along a margin stop bar comprising a rack edge, said stop comprising a stamping bent over to straddle said bar, and a spring pressed finger pivotally mounted below said bar between the two sides of said stop, and a rack engaging portion turned out from said stamping.

In witness whereof, I have hereunto subscribed my name.

MAX GARBELL.

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