US2004938A - Typewriter attachment - Google Patents

Description

Patented June 18, 1935 UNITE-o STATES 1 Claim.

roots-as TYPEWRITER ATTACHMENT David Friesel, United States Army,

Washington, D. C.

' Application July 3, 1933, Serial No; 678,898

(Granted under the act or March 3,1883, as

amended April 30, 1928;370 0. G. 757) The invention described herein, if patented, may be manufactured and used by or for the Government for Governmental purposes without payment of; any. royalty thereon.

This invention relates to an improved attachment for typewriters or the like, and more particularly to an article of manufacture adapted to be applied to any. of the various forms of said znachinesfor the purpose of retaining the paper after leaving the platen, in proper position and prevent its being blown toward the operator into a position to obscure the work, cause the paper to be soiled or prevent the proper functioning of parts of the machine.

One-of the objects of this invention is to provide an attachment that may be promptly applied to or removed from any of the present typewriting machines.

Another object is to provide adevice. having.

mounting means that may be applied to a con- Venient partof" a machine without requiring the services of an expert, the use of any tools, or the necessity of any change in the machine, such as the boring of holes or cutting away of any parts of the machine.

A further object is to provide a device of simple, durable and inexpensive construction that will permit its application to a machine and its operation will be quickly understood, one having few parts of sturdy construction that will stand rough usage and may be produced at very little cost from stamped metal, requiring no machine work, and yet be as effective as devices for the same purpose of a more complicated and expensive character.

The above and other objects will be hereinafter more fully pointed out in the following specification and drawing and finally set forth in the claim, it being understood that changes in form and minor details of construction may be resorted to without departing from the spirit of the invention or falling beyond the scope of the claim.

Similar numerals indicate corresponding parts in all the figures of the drawing in which:

Fig. 1 is a front View of a fragment of a typewriter carriage with my improved paper guard applied.

Fig. 2 is a side view partly in section of the parts shown in Fig. 1 with a sheet of paper in place beneath the guard.

Fig. 3 is an enlarged detail perspective view of the preferred form of. the device.

Fig. 4 is a detail section of the hinge connection between the guard arm and. its support.

Fig; 5-is anlenlargeddetail perspective view of: the" clamping means at the base of the supporting memberofthe device.

Fig. 6 isaview similar to Fig. 5, of a modified form of clamping imeans.

Fig. '7 is a similar view of another modified form of clamp. 1

Fig. 8 is a modified form of the device, wherein the guard armland itssupport are formed integral, and: the modified formclamp shown in Fig. 5 maybe used.-

Reference now being had-to the drawing, l indicates the platen, Zthe paper table and 3 the paper guide of. atypewriter.

The improvedpaper guard is usually mounted on the'upturned'edge 4 of thepaperguid'e. 3 and consists of the supporting orimountingmember provided with a clamp at its, base adaptedtobe detachably secured to said'edge 4 in.such;a..man,-. ner as to firmly hold the mounting memberiiin anuprightposition; I

The clamp at the base of the. mounting member consists of a jaw 6 mounted near the lower end of support 5 and extending parallel therewith, to provide a space in which is mounted a spring metal friction member 1, adapted, when forced down over the upturned edge 4 of the paper guide, or other similar part of the carriage, to maintain the supporting member firmly in position.

At the upper end of supporting member 5, is hinged at 8, the guard arm 9. Said hinge is formed by cutting away the central portion of the upper end of member 5,,and turning its.

extending ends into sockets in for the reception of hinge pin II. The guard arm 9 is provided with a socket I2 at its hinged end for the reception of pin II, thus forming the hinged connection referred to. The base of the cut-away portion in member 5 is so located as to form a stop [3 with which arm 9 comes into contact, to maintain the arm in a horizontalposition while in its operative position over the carriage.

The hinge permits a free outward swing of the arm, thus providing unobstructed access to the work when necessary. I

The above parts are shown and described specifically for purposes of illustration only, it being understood that slight changes may be found expedient. For instance, it may be considered advisable under certain conditions to provide a shorter supporting arm, and have the guard arm rest on more or less of an incline, or the arm 9 be slightly curved, instead of a. straight arm. arranged horizontally as shown.

Ordinarily the guard arm extends approximately one-half the width of the paper, but may be of greater length if desirable. Said length will provide the required results with the usual work suchas letter writing, wherein the upper or outer sheet is the original, is of relatively heavy paper, and if the arm extends only partly across same, it will, due to the stifiness of the paper, retain the full width of said origiin a rearwardly inclined position "throughout" the remainder of the work.- Should, access to the original and carbons be necessary for an erasure or for other purposes, the arm may be swung back, and the sheets of paper be entirely released from beneath same. H

Arm 9 may be of relatively light Weight, for the reason that when the paper is blown toward the operator, it presses against the arm and tends to overlap and not, lift the arm and further, the pressure exerted by the paper when blown against the arm is at right angles to the swing of the arm, therefore even when the'currents of airare very strong, the arm "will not release the paper, unless lifted by hand- Fig. 6 shows a modified form of clamp at base of supporting member 5, wherein a clamping bolt l5 having a knurled head I6 is threaded through the jaw member 6 and functions in a manner corresponding to that of the frictional spring member I. of Fig. 5.

Fig. 7 is another modified form of means. for

provide a clamp to be attached to a 'line while over the machine.

mounting 'the device and consists of a spring pressed swinging jaw l1 adapted in cooperation with the lower end of supporting member 5, to part of the typewriter.

Fig. 8 is a modified form of the device wherein the supporting armia. andv guard arm 9a are formed integral, the clamp at base of supporting member being that shown in Fig. 6.

This device may be constructed entirely of stamped metal parts, at very low cost, and may be applied to or removed from a machine instantly, in fact the form shown in Fig. 8 is entirely satisfactory due to said quick application and removal to and from position, it being obvious that should an erasure on the work be required, the device can be slipped off ofthe machine, the corrections made, and the device again adjusted in place in less time than is required to adjust the paper in some of the guards now on the market.

Having fully described my invention, what I claim and desire to secure by Letters Patent is:

The combination'with a typewriting machine having a carriage, a platen and a paper guide provided with an upturned portion, of a guard consisting of a supporting member removably mounted on said upturned portion'adapted to occupy a position with relation to the left hand edge of the paper, regardless of its width, said member extending in an upright direction, a

guard arm hingedly mounted at the upper end' of said supporting member and adapted to extend over said platen to cause the paper to ex tend rearwardly upon leaving the platen, or be swung free of the machine to release said paper,

and means carried by said supporting member to prevent the arm falling below DAVID FRIESEL.

a horizontal

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