US1521336A - Typewriting machine - Google Patents

Description

Dec. 1924- 1,521,336

/ J. A. B. SMITH TYPEWRITING MACHINE Filed Nov. 16, 1921 4 #fiZlZZ by i; Z 255% Patented Dec. 30, 1924.

[1MB sr JESSE A. B. SMITH, GE STAMFGRID, CONNECTECUT, ASfiIGrNOR-TO UNDERWOOD TYPE- WRITEE GOIVIPAHY, OE NEW YORK, 'hT. Y., A CORPGB-ATICN OF DELAWARE.

TYPEW'RI'IING Application filed November 16, 1921.

To all whom it may concern:

Be it known that I, Jnssn A. B. SMITH, a citizen of the United States, residing in Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

'The present invention relates to sounddeadening casings in which typewriting machines are adapted to be operated.

Such a casing usually has a window-pane, through which the operator may observe the printing. It has been found that light, either artificial or natural, may, in certain positions of the, casing, be objectionably reflected by the window-pane to the eyes of the operator.

One feature of the present invention is the provision of means whereby the window-pane may be shaded from any light which would otherwise strike the same at an objectionable angle. It is undesirable that such a shade should obstruct the vision of the operator or render the worksheet too dark to read and so, in the preferred embodiment of the invention, the shade or light-deflector is of translucent or lightdiffusing material, such as ground lass or glass of roughened or uneven surface, and is positioned behind the line of vision of the platen.

A feature of the invention is a pivotal mounting of the shade or blinder, whereby the same may be swun forward to any position for interception of undesirable light-rays; and a means whereby the shade or blinder may be automatically secured in any adjusted position thereof. In the embodiment of the invention hereinafter specifically shown, the shade or blinder is in the form of a glass plate carried by arms, 'of spring sheet-material, which exert a lateral pressure on their supports on the casing-cover, and which, by the friction thus created, hold the shade in the position in which it is turned on its pivotal mounting.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a view in side elevation, partly in cross-section, of a casing embodying the attachments of the present invention; the casing being partly broken away to in Iv'iACHINE.

fieria'i. No. 515,437.

writing machine, part of the typewriter frame being shown at 9; the keyboard extension 10 of the typewriting machine protruding through a suitable opening in the front wall 11 of the body-portion of the casing. A slot 12, which extends horizontally lengthwise of the front wall of the casing-cover, is normally closed by yieldable cushions (not shown). Through this slot protrude levers (not shown), includ ing the line-space lever, which are all mounted upon the typewriter carriage and which move along the slot 12 between the yieldable body-cushions which form the same, as the carriage of the typewriting machine has its letter-feed and return movements.

In the top of the cover 2 is a window, through which the operator may observe the printing platen 8. The window c0mprises a frame 44-, in which is seated and suitably held a pane 45 of glass or other transparent material. When artificial light or daylight strikes the pane 45 at certain angles, an objectionable reflection may be thrown into the eyes of the operator. To prevent light from striking the pane 45 at such angles as to cause such objectionable reflection, there is provided a shade or blinder in the form of a plate 16, preferably of ground glass, or of glass having an uneven surface, but which, in any event, is of such material as to diffuse the light which would otherwise strike the pane at an objectionable angle; without, however, darkening the work-sheet to render it unreadable.

The plate 4.6 is intended to be adjustable not only between operative and inoperative positions, but between different operative positions, according to lighting conditions.

Accordingly (see Figure 2), it is shown as held at each end inU-shaped metal pieces 48, secured to or forming part of arms 49, having pivot-holes 50 at one end thereof. The holes 50 serve to receive pins 51 on brackets 52, screwed or otherwise secured to the cover at the sides of the window. The

arms 49 are preferably ispring-arms, the tendency of which is to press outward against the inside faces 58 of the brackets 52, so that the plate 46, when rocked to any desired position, will be maintained in that position by the friction of the arms 49 on the faces'53 of the brackets. The holes 50 are of sufficient size to accommodate the a work-sheet is typed, of a sound-deadening casing for sa d machine, said casing having a work-sheet illuminating opening in front of the platen, through which the typing upon the enclosed work-sheet is visible to the operator, a transparent pane in said opening, said pane capable of reflecting surface glare from the exterior source of worksheet illuminating light, and translucent light-diffusing means mounted to occupy a position out of the line of vision of the operator and between said pane and the source of light, for overcoming the glare, said light diffusing means leaving the enclosed work-sheet visible through said transparent pane.

2. The combination with a typewriting machine, comprising a platen upon which a work-sheet is typed, of a sound-deadening casing for said machine, said casing having a work-sheet illuminating opening in front of the platen, through which the typing upon the enclosed work-sheet is visible to the operator, a transparent pane in said opening, said pane capable of reflecting surface glare from the exterior source of work-sheet illuminating light, and translucent light diffusing means mounted to occupy a position out of the line of vision of the operator and between said pane and the source of light, for overcoming the glare, said means leaving the enclosed work-sheet visible through said transparent pane and comprising a device for diffusing the light.

3. The combination with a typewriting machine, comprising a platen upon which a work-sheet is typed, of a sound-deadening casing for said machine, said casing having a work-sheet illuminating opening in front of the platen through which the typing upon the enclosed, work-sheet is visible to the operator, a transparent pane in said opening, said pane capable of reflecting surface glare from the exterior source of Work-sheet illuminating light, and translucent light-diffusing means mounted to cocupy a position out of the line of vision of the operator and between said pane and the source of light, for overcoming the glare, said means leaving the enclosed work-sheet visible through said transparent pane, and being adjustable to compensate for different positions of the machine relatively to the sound-deadening casing and to the source of light. 7

4. The combination with a typewriting machine, comprising a platen upon which a work-sheet is typed, of a sound-deadening casing for sand maclnne, said casing having a work-sheet illuminating opening in front 7 of the platen, through which the typing upon the enclosed work-sheet is visible to the operator, a transparent pane in said opening, said pane capable of reflecting surface glare from the exterior, source of I worksheet illuminating light, and means mounted to occupy a position out of the line of vision of the operator and between said pane and the source of light, for overcoming the glare, said means leavingthe enclosed work-sheet visible through said transparent pane and in the form of a translucent shade mounted for pivotal adjustment on said sound-deadening casing.

5. The combination with a typewriting machine, comprising a platen upon which a worksheet is typed, of a sound-deadening casing for said machine, said casing having a work-sheet illuminating opening in front of the platen, through which the typing upon the enclosed work-sheet is visible to the operator, a transparent pane in said opening, said pane capable. of reflecting surface glare from the exterior source of Worksheet illuminating light, and means mount ed to occupy a position out of the line of vision of the operator and between said pane and the source of light, for overcoming the glare, said means leaving the enclosed work-sheet visible through said transparent pane, and comprising a translucent pane extending the length of said opening, a frame for supporting said pane, and a pivotal adjustment for said frame upon said sound-proof casing.

6. A sound-deadening casing for a typewriting machine, having a window through which the operator may observe the printing, a transparent pane for the window, a

shade or blinder for intercepting light rays the arms being pivoted to the casing, and being of spring material to exert a lateral pressure against their supports, whereby the shade or blinder may he held by friction in any adjusted position.

7. A sound-deadening casing for a typewriting machine, having a Window through which the operator may observe the printing, a transparent pane for the Window. and a shade or blinder of translucent or lightdiffusing material, such, as for instance, as ground glass, or glass of uneven surface, for intercepting light rays which would otherwise be reflected by the pane to the operators eyes.

8. The combination with a typewriting machine, oif a sound-deadening casing therefor having a Window to illuminate the enclosed work-sheet and through which the operator may observe the printing, a transparent pane for the Window, and a translucent shade or light-diffusing means movable from a normally ineffective position to an adjustment wherein it intercepts incoming light rays which would otherwise be reflected by the pane to the operators eyes.

JESSE A. B. SMITH.

Witnesses:

EDITH B. LIBBEY, JENNIE P. THORNE.

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