US1450369A - Keyboard screen for typewriters - Google Patents

Description

O. A. HOKANSON KEYBOARD SCREEN FOR TYPEWRITERS Apr. 3, 1923 Filed Mar. 24, 1919 Patented Apr. 3, 1923.

UNITED STATES l 1,450,3ea'y PATENT .oEElcE OTTO A HOKANSON, 0F WOODSTOCK, ILLINOIS, ASSIGNOR T0 WOODSTOCK TYPE- WRITER COMPANY, OF WOODSTOCK, ILLINOIS, A CORPORATION 0F ILLINOIS.

KEYBOARD SCREEN FOR TYPEWRITERS.

Application filed March 24, 1919.

To all whom t may concern:

Be it known that I, OT'ro A. HoKANsoN, a citizen of the United States, residing at Woodstock, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Keyboard Screens for Typewriters, of which the following is a specification.

This invention has for its object the provision of a screen for typewriter keyboards which shall be of improved construction and operation.

The invention is exemplified in the combination and arrangement of the parts shown in the accompanying drawing and described in the following specification, and it is more particularly pointed out in 4the appended claims. i

In the drawing- Fig. 1 is a side elevation of the screen embodying the present invention shown in place upon a typewriter;

Fig. 2 is a top plan view of the screen shown in Fig. 1;

Fig. 3 is a detail sectional view on line 3 3 of Fig. 2; and

Figs. 4, 5 and 6 are views similar to Fig. 3, but show slight modifications.

In the drawings, the numeral 10 designates a portion of the upper frame plate of a typewriter which is provided with ribbon spool casings 1l, one at each side of the machine, the casings being supported on standards 12 mounted on the upper surface of the top plate 10. A pair of supporting bars 13 are secured to opposite edges of a screen plate 14, and the bars 13 are provided with projecting arms 15 having their ends 16 slightly bent outwardly so that when the ends of the bars 13 are sprung between the standards 12, the ends 16 will partially hook around the standards and hold the bars 13 in place. The projecting portions 15 of the bars are sufficiently resilient to cause them to bear against the inner sides of the standards 12.

In the form shown in Figs. 1, 2 and 3 the bars 13 are secured to the upper face of the plate 14 by rivets 17, and the projecting portions 15 are given a quarter turn, as shown at 18, so that they may be more readily sprung between the standards 12, and so that they will offer greater resistance to vertical bending. The projecting portions 15 of the bars 13 rest upon the upper front Serial No. 284,804.

edge of the top plate 10 so that thescreen plate `14 will be inclined slightly downl wardly toward its front edge, as shown in Fig. 1. A rubber tube or other protecting covering 19 is preferably slipped over .the projecting portions 15 of the supporting bars to prevent the typewriter from `being marred by the useof the screen. The front edge of the screen plate 14 is preferably turned up, as shown at 20, to provide a ledge for holding notes or papers from sliding downwardly when placed upon the plate 14.

The lateral edges of the plate 14 may be offset downwardly, as shown at 21 in Fig. 4, to bring the top face of the bars 13 in the plane of the upper surface of the screen plate 14. A slightly different construction is shown in Fig. 5 in which the lateral edges of the plate 14 are turned downwardly at right angles to the plate, as shown at 22, and the bars 13 in this construction are secured to the vertical faces of the downwardly turned flanges 22. When this construction is employed it is not necessary to provide the quarter turn18 in the projecting arms 15 since the bars 13 are in an upright position throughout their entire length.

In the form shown in Fig. 6 the edges of the plate 14 are bent entirely around the bars 13, as shown at 23, in order to give a lfinished appearance to the sides of the screen plate.

It will be understood that the keyboard screen may be easily placed in position upon the typewriter, and may be readily removed when its use is not desired. When in place, the plate 14 covers the keyboard, rendering it invisible to the operator, but leaving sufficient space between the screen and the keys for the operators hands.

I claim 1. A typewriter keyboard screen comprising a plate having a ledge extending along the forward edge thereof and having 100 resilient arms extending rearwardly from the opposite edge thereof, said arms having outwardly bent portions at their ends arranged to be sprung inwardly so that the ends of said bars will pass between upwardly 105 projecting pontions on a typewriter and spring outwardly to resiliently engage said portions and hold said screen in place on said typewriter.

2. A typewriter keyboard screen compris- 110 ing a plate having resilient arms extending from oner edge-,thereof substantially in the plane of said plate, the extending portions of said arms being rarranged `with their greatest width in an upright direction so that said arms will yieldhorizontally but will offer resistance to vertical bending7 the` ends of said arms being bent to form hooks for engaging projecting portions vof a typewriter to hold said screen in place on said typewriter.,v Y y l 3. Incoinbination, a typewriter: having a frame plate anda pair of upwardly projecting portions on said frame plate, and a l5 keyboard screen having bars connected to opposite edgesthereof andarrangedto project beyond a thirdfedgevof said plate,the

,projecting portions of said bars having bent )ortions ior enOfaOinO the u wardl eX n tending projections on the'rame plate of said typewriter while other portions of'sa-id4 bars restnpon thev .upper surface of said frame plate to hold said keyboard screen `in an inclinedpositionbn said typewriter so name to this-specification on this 20th day@ of March,A. D. 1919.

OTTO vA. HOKANSON. f

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