US1444536A - Oscillating backrest - Google Patents

Description

R. M. BOYCE OSCILLA'IING BACKREST Feb. 6, 1923.

Filed Apr. 10, 1922 INVENTOR.

ATTORNEY '1 jL Patented a i in r can ROY Ill. BDYCE, OF STOCKTON, CALIFORNIA.

OSOILLATING BACIIREST.

Application filed April 10,

1 "0 cilia/ 1 0722 it may concern:

Be it known that 1, Roy M. Boron, a citizen of the United States, residing at Stockton, county of San Joaquiiutitate of (.aliiornia, have invented certain new and useful Improvements in Oscillating Backrests; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accomz panying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to a back-rest for the drivers of automobiles and other vehicles whose motion produces a more or less constant vibratory and jarring effect on the driver, especially on his back, which sooner or later induces severe strain and fatigue, the ordinary cushions provided in automobiles and the like not being sufiiciently resilient to absorb the vibrations.

The principal object of my invention therefore is to eliminate this objectionable feature of automobile driving by providing a detachable back-rest which is interposed between the back-cushion and the back of the driver, and against which the latter rests, which back-rest is so constructed that it forms an oscillatory cushion between the seat-back and the driver, allowing for relative movement between the seat and the back of the person, without his back actually sliding against or contacting with the seat-back.

By means of this device therefore, all tiring vibrations and jarring effects are counteracted and absorbed, to the ease and comfort of the user.

It is evident of course that the use of my device is not confined to the driver of the car, since individual back-rests may he provided for all the occupants.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Fig. 1 is a perspective outline of an auto- 1a22. Serial No. 551,020.

mobile seat, showing my improved device installed in connection therewith.

Fig. 2 is a face view, with the outer cover entirely removed and with one of the oscillating plates partly removed.

F 3 is an enlarged vertical section of half of the device;

Referring now more particularly to the characters of reference on the drawings, the numeral 1 denotes a somewhat flexible plate, preferably of metal and of suitable din'iensions, spaced somewhat from which is a similar plate 2 of equal size and preferably of the same material.

Secured onto the plate 2 at spaced intervals and located between the two plates are ball bearing units 3 of the thrust type, on which the other plate 1 rests, so that the plates are free for universal sliding movement one on the other with a minimum of friction.

The plates are normally held in edgealined relation, and automatically returned to such position after any sliding movement by means of a stout elastic band or strap at, which extends substantially from end to end of the plates in a vertical direction. This band is somewhat flexibly secured at both ends to the plate 2 on the face thereof adjacent the plate 1 as at 5, and then passes through slots 6 cut in the plate 1, so that the central portion of the band lies on the outer face of the plate 1, to which plate it is rigidly secured, preferably at one centrally located point as at 7.

Thus it will be seen that if the plates should move vertically with respect to each other, one section or the other of the band, between the connection 7 and either connection 5, will be stretched, automatically eX- crting a tendency to restore the plates to their normal setting.

Similarly if the plates move transversely with respect to each other, the band will be stretched sideways, again exerting a tendency to restore the plates to their normal setting.

The outer face of the plate 2 has fixed thereto a covering 8 of leather or similar material, which extends a certain distance beyond the edges of said plate all around the same, a filling of padding 9 being preferably placed between said covering and plate.

The plate 1 has fixed thereto a covering member 10 of the same material and size as the cover 8, there being padding 11 between the plate 1 and cover 10, this padding being preferably thicker than the padding 9 and arranged to conform to the curvature of the human back, since this is the side or :tace of the device which receives the back thereagainst.

The outer edges of the coverings are sewed or otherwise secured to each other through out their extent, the space between the edges of the plates and the corresponding edges of the covers being suflicient to allow for the necessary freedonrof oscillatory movement oi. the plates without striking said edges and thereby straining and perhaps tearing the covers.

To detachably fasten the device to the seat-back 12 of an antomobile, I preferably provide straps 13 fixed to the upper edges ot the covers, which are adapted to engage carriage buttons 14 or similar members fixed onto the back 12. a

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

1 I claim as new and useful and desire to se cure by Letters Patent, is 2- 1. A back-rest including apair of super imposed plate members arranged for universal oscillatory movement with respect to each other, and an elastic strap e1-1tending lengthwise of the plates secured at its ends to one plate and intermediate its ends to the otherplate.

2. A back rest including a pair oi superimposed plate members arranged for universal. oscillatory movement with respect to each other, an elastic strap extending lengthwise of the plates secured at its ends to one plate and centrally of its length to the other plate, and flexibly engaging said last named plate between the central connection and each end.

In testimony whereof I affix my signature.

ROY M; BOYCE.

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