US521120A - I ktku littlk - Google Patents

Description

(No Model.)

P. LITTLE. REVERSIBLE GAR CHAIR.

Patented June 5, 1894.'.

Guiana;

I I n I l 1 II I I l I 1 I 4/ UNITED STATES PATENT OFFICE.

REVERSIBLE CAR-CHAIR.

SPECIFLLCATION forming part of Letters Patent No, 521,120, dated June 5, 189 4.

A plication filed December 8, 1891. $erial No. 414,356. (No model.)

To all whom it may concern.-

Be it known that 1, PETER LITTLE, a citizen of the United States, and a resident of the city of Louis, State of Missouri, have invented certain new and useful Improvements in Reversible Car-Chairs, of which the following is a specification. 7

My invention relates to that kind of reversible car chairs in which the back is supported 10 by two intersecting arms or levers on each side of the seat, the arms or levers being pivoted to the back and fulcrumed at fixed points on the seat frame.

The invention consists in connecting the I 5 lower ends of the levers by two links pivoted together, the sum of whose lengths is greater than the distance between the fulcrum points of the levers. By this connection a part of each of the links may be brought alternately to the same point when the back is on either side of the seat, thus enabling me to employ but a single locking device with this particular style of back support, and by making the links of equal lengths the locking device may 2 5 be placed about midway laterally on the side frame and thereby obtain a more equal distgibut-ion of the strain upon the parts of the (t 1311.

In the accompanying drawings forming a 0 part of this specification: Figurel represents an inside elevation of one of the side frames of the car chair, showing the relative position of operating parts when the chair back is locked in position. Fig. 2, is an outside View of the supporting frame and pedestal, showing the location of the key hole throfl'gh which the key engages with'the spring bolt. Fig. 3, is a vertical section of the lock on line t, i, of Fig. a. Fig. 4, is a top View of the 0' lock case taken on line 5, 5, of Fig. 2. Fig. 5, is a longitudinal section of the outer part of the locking bolt, with the key in position for withdrawing the bolt. (5, is a perspective view of the bolt. 5 In the drawings and specification like letters indicate like parts.

A is the pedestal; A one of the supporting side frames thereon. 1

l; is the chair back, and U C the intersecting armswhich support the back, the said arms being pivoted near their lower ends to the supporting frame A'. The arms extend below the pivotal point, and to these exte'nsions the shifting links D D are loosely pivotedat their outer ends, the inner ends of said links being pivoted together, forming a loose joint. These links-preferably have openings E into which a spring bolt E may enter to hold the parts when the chair back is in position. v

G is the bolt-holder secured to the supporting frame and through which the bolt E has longitudinal play. This holder iscounterbored so as to receive the spiral spring g which surrounds the bolt, the bolt being held in the holes or openings E in the shifting links by the tension of said spring.

The bolt E is provided with stop pin a, against which the spiral spring bears, the

'other end of the spring bearing against a thim- 7o ble fitting into an opening through'the supporting frame, as shown in Fig. 3. The thimbio. F has an annular flange fitting into a counter bore in the bolt holder, as shown in Fig. 3. v

The bolt holder is held in place by bolts passing through lugs thereon and through the supporting frame, as shown in Fig. 4. The holder is recessed at its inner end to receive the link D, the inner wall of the recess form: ing a guard H, the function of said guard being to retain in proper position the shifting links when the chair back is shifted and locked. -Bolt E is provided with a longitudinal and transverse slot-forming a key track 8 5 and ward-into which the key passes and .turns, when the bolt is to bewithdrawn. See

Figs. 5 and 6. W hen the chair back is to be shifted from one side to the other the key is insertedin the bolt and given a quarter turn and the bolt, pulled toward the operator. This. releases the bolt, and allows the link engaged thereby to be moved away from the look so that the chair back may be carried from one side to the other, the bolt again en- 5 tering into engagement with the other link as soon as the opening therein is brought into position to receive it. In reversingthe back,

it will be moved into a horizontal position thereby increasing the distance between the I00 lower ends of levers C O and consequently drawing the links D D up over the locking deyice,-and as the'back assumes the ver- .;be brought in position alternately to be engaged by the locking device.

tion, and for which Iask'Letters Patent of the United States, isr v In a reversible chair,the combination with sideframes A A5 and back B, of two intersecting arms'or levers C. C pivoted on either side ofthe back and fulcrumed to the frame substantially as shown,and two links D D pivoted together the sum of whose lengths is greater than the distance between the fulcrum points of the levers, the said links connecting the levers, whereby each link may be brought alternately to thesame point to be engaged by I a locking device, as set forth. What I clainias new and of my-owninven- In testimony that I claim the foregoing as my invention I have signed my name; in presence of two witnesses,this 20th day of October,

' PETER LITTLE. Witnesses: 4 J 01ml. PRIMEAU,

STEPHEN F. SULLIVAN.

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