US956618A - Sound-absorbing device for type-writers. - Google Patents

Description

E. BALTZLEY.

SOUND ABSORBING DEVICE FOR TYPE WRITERS. APPLICATION FILED JULY 1. 190 7.

956,618. 7 Pgtentea MRy3,1910.

. blows struck by its keys, and thereby A UNITED STATES PATENT OFF-ICE.

EDWIN BALTZLEY, or GLEN EcHo, MARYLAND, ASSIGNOR To tours E. BALTZLEY, or WASHINGTON, DISTRICT or COLUMBIA.

Specification of Letters Patent. 7

, Patented May 3, 1910.

Application filed July 1, 1907. Serial No. 381,708.

To all whom it may concern:

Be it known that I, EDWIN BALTZLEY, of

Glen Echo, in the county of Montgomery, and in the State of Maryland, have invented certain new and useful Improvements in Sound Absorbing Devices for Type Writers, and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which" Figure l is a perspective view of one em-' bodiment of my invention; Fig. 2 is a perspective view of the typewriter supporting member of another form of my invention; Fig. 3 is a detail View in vertical section of a portion 'of the form of my invention in which the part shown in Fig. 2 is employed; Figs. 4 to 8, inclusive, .are detail views of other embodiments of my invention and- Fig. 9 is a perspective view of a frame adapted for use with my invention for type-.

writers whose bases are of different size.

As is very well known, the o eration of typewriters results in a degree 0 noise, produced by the manipulation of the keys and themovement of the paper carriage, that is" seriously objectionable, and though efl'orts My invention consists in the sound. ab-

sorbing means constructed substantially as hereinafter specified and claimed.

I have found that all the noise produced by the operationof a typewriter can be prac tically eliminated by interposin between the machine and the desk or stan on which it is mounted a spring support of such con struction as to permit slight vertical movement of the typewriter under the impact of revent the transmission of the blow to the csk with resulting noise the blow being taken up or absorbed-by the spring support, and so that the typewriter will move laterally slightly under the shock of the longitudinal movement of the paper carriage, a jar or blow to the desk or stand from this cause beingavoided by being absorbed or taken up in the spring support. This spring supportment-of my purpose, but an excellent arrangement is Illustrated in Fig. 1, where it consists of a pair of metal strips 11 to which the typewriter is attached, and which at .may be given various forms for the.attaineach end is attached to the top 2 of the desk or stand, by means of screws or bolts 3 between which ends'and the portion on which the typewriter rests the stri is bowed or bent in an inverted U-shape orm 4, the leg 5 of the U next the t pewriter being shorter than the other, so til strip on which the typewriter restsis su ported above the surface of the desk, wit out any likelihood of its cominginto contact therewith. By reason of the bends or Urshapes, as described, the typewriter will movement of the typewriter underthe shocks or blows administeredto it in operating it, whereby suchshocks or blows are prevented 'from being transmitted to the supporting desk or table. I

Instead of the one-piece device shown in Fig. 1, the springs at each end of the metal strrpmay' be unconnected, and each directly attached to the frame of the typewriting maat the. portion of the chine, and as shown in Fig. 6 the springs may be made of wire bent into proper shape.

To adapt my spring support so that the same support may be fitted for use with frames whose bases are of various slzes, I employ, as shown inFig. 9, a. rectangular frame or plate 6, which is attached to individual springs, such as those shown In Fig.

3 the late bein thereby yieldin 1y suppbrted iibove the leaf and upon it i s placed the t pewriting machine. Said late is provide with an assortment of ho es 7 to suit the base of frames of different sizes.

As shown in Fig. 2 a metal strip 8 may be em loyed, either elastic or inelastic, andat eac end a coil spring 9 (Flg. 4) may be 1nterposed between it and the leaf or othersupport, the coil spring permittin vertical, as well as horizontal, movement the typewriter. The end of spring 9 opposite that engaging plate 6 bears against the plate 10, provided with holes for its attachment to ithe-leaf, and. a bolt 11 connects the two plates and passes through'the coil spring 9.

In Fig. 7 a construction similar to that shown in Fig. 4 is illustrated, excepting that the plate 8 is omitted, and in place thereof, a $091112, which is attached to the typewrltingframe, is employed; and in Fig. 5

the coil spring is shownadapted to a typewriter whose frameis provided with a foot 13, in which instance the foot has a hole in which is seated the shank of a button 14, be-

' tween which button and a bearing piece 15 the spring 9 is interposed. The bearing piece 15 has contact with the desk top.

As shown in Fi 8 the spring device is the same as that ilustrated in Figs. 1 and 3, excepting that each spring device is indein pairs by a cross bar, but eac directl stasis Having thus described my invention, what ing the shock and sound of the ty e bars and carriage of the typewriter, a meta. loop having vertical and horizontal resilience, means for attaching it to a desk, and detachable means for attaching it to a typewriter.

A sound absorbing supporting device for typewriters, comprising typewriter and desk engaging members, and the device heing bent between such members vertically 'andhorizontally to form legs of unequal length, the longer leg being connected to the desk engaging member.

4. A supporting device for typewriters, consisting of a metal strip bent at its ends to form legs of unequal length at each end, the longer leg being the desk engaging part.

In testimony that I claim the foregoing I have hereunto set my hand.

EDWIN BALTZLEY.

Witnesses: I

CHAS. J. WmLiAMso'n, 1+. J.

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