US2615498A

US2615498A - Reclining article of furniture

Info

Publication number: US2615498A
Application number: US729289A
Authority: US
Inventors: Lorenz Anton
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-02-18
Filing date: 1947-02-18
Publication date: 1952-10-28
Anticipated expiration: 1969-10-28
Also published as: DE866723C; GB632070A

Description

Oct. 28, 1952 AJLORENZ I 2,615,498

-RECLINING ARTICLE OF FURNITURE Filed Feb. 18, 1947 3 Sheejzs-Sheet l INVENTOVR B-IQIVTO/V' [aka/v2 m s ATTORNEY A. LORENZ RECLINING ARTICLE OF FURNITURE Oct. 28, 1952 Filed Feb. 18, 1947 '3 Sheets-Sheet 2 K INVENTOR g/v ro/v [oa /v W;

- H 5 ATTORNEY 0CL28, 1952 LORENZ 2,615,498

RECLINING ARTICLE OF FURNITURE Filed Feb. 18, 1947 :s Sheets-Sheet s INVENTOR v 0A/i0/V ZaPE/VZ H l s ATTORNEY Patented Oct. 28, 1952 UNITED STATES PATENT OFFICE RECLINING ARTICLE F FURNITURE Anton Lorenz, Buffalo, N. Y.

Application February 18, 1947, Serial No. 729,289

12 Claims. 1

This invention relates to articles of furniture, and more particularly to reclining articles of furniture, wherein a seat, a downward extension of a back-rest and a link-chain composed of a plurality of connectin links form movable members of a link-system swingably mounted on a support, and wherein the movements of a le rest swingably mounted on the seat are controlled by a controlling mechanism in dependence on the movements of a member of said linksystem.

An object of the present invention is to provide a new and useful controlling mechanism for the swingable leg-rest of a reclining article of furniture of above described type, by means of which the leg-rest may be readily brought into a substantially horizontal position, when the back-rest and seat are brought into an extreme reclined position.

A further object of the present invention is to equip a reclining article of furniture with a locking device, by means of which the movable members of the reclining article of furniture may be locked in one or more predetermined positions and may be frictionally held in other positions.

Another object of the present invention is to improve on reclining articles of furniture of above described type as now ordinarilyinade.

With the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth in the claims hereof, certain embodiments of the same bein described in the specification and being illustratedin the accompanyin drawings forming part of this specification, wherein:

Fig. 1 is a side elevational view of an adjustable reclining chair, according to the invention, a portion of a side wall of the support being broken away.

Fig. 2 is a fragmentary side elevational view illustrating the locking deviceof the chair shown in Fig. 1 in an enlarged scale,

Fig. 3 is a side elevational view of a different embodiment of a locking device which may be used in the chair shown invFig. 1,

Fig. 4 is a side elevational view of a different embodimentof an adjustablereclining chair according to the invention, a portion offa side wall of the support being broken away.

Fig. 5 is a side elevational view of another embodiment of an adjustable-reclining chair according to the invention, a portion of a side wall of the support being broken away,

Fig. 6 is a side elevational view .of a further embodiment of an adjustable reclining chair according to theinvention, a portion of a side wall of the support .beingrbroken away.

Fig. '7 is, a side elevational view of another embodiment of a reclining chair according to the invention, a portion of a side wall of the support being broken away, and d Fig. 8 is a side elevational view of a further embodiment of a reclining chair according to the invention, a portion of a side wall of the support being broken away.

Referring now to Fig. '1', 10 generally indicates a support substantially in the shape of a casing.

The rear end portion of a seat I2 is pivoted to the support I0 at M. A back-rest I6 is pivotally mounted on the support I0 at I8 at a point spaced from the pivotal connection I4 between the seat l2 and the support In. The back-rest [6 has a downward extension 20 projecting downwardly below the plane of the seat 12. The adjustable reclining chair comprises at each of its sides a link-chain including a bent lower connecting link 22 and a front connecting link 24 pivotally connected with each other at 26. The rear end of said link-chain, i. e., the rear end portion of the lower connecting link 22, is pivoted to the downward extension 20 of the back-rest It at 28; the front end of the link-chain, i. e., the upper end portion of the front connecting link 24, is pivoted to the seat l2 at 30. Said seat [2, said downward extension 20 of the back-rest I6 and said link-

chain

22, 24 form the movable members of a link-system swingably mounted on the support ID as described above. The movements of the movable members of said linksystem are controlled by guiding means or a guiding link 32 associated with the support H] and a link of the link-chain; accordin to Fig. 1, one end of the guidin link 32 is pivoted to the support ID at 34, the'other end of said guiding link 32 is pivotally connected with an intermediate point of the lower connecting link 22 at 36.

A leg-rest 33 is swingably mounted on the front portion of the seat l2 at 49. On each side of the chair, one end of a controlling link 42 passing through a slot A l of the front wall of the casing like support H3 is pivoted to said leg-rest 38 at 46, the other end of said controlling link 42 is pivoted to an intermediate point of the lower connecting link 22 at lii. Thus, the movements ofthe vswingable leg-rest 38 are controlled by the controlling link 11 2 in dependence on the movements of the lower connecting link 22 of the link chain 22, 245'.

The sitting position of the movable members of the chair is limited by the upper edge of the,

casing-like support lil on which the seat l2 comes to a rest. When the o'ccupant of the chair leans the weight of his body against the back-rest it and,, swings,s.ame into a reclinedposition, for ex ample, the extreme]reclinedpo sition it limited bythe edgeim of the. rear wall of the support It n ratin w th t b ck e h ea 1 is swung into the reclined position I2 through the medium of above described link-system, and the leg-rest 38 is brought into the substantially horizontal position 38 through the medium of the controlling link 42 arranged between the legrest 38 and the lower connecting link 22.

As best shown in Figs. 1 and 2, the adjustable reclining chair is provided with a locking device generally indicated by 52. Said locking device 52 comprises a rockable lever 54 swingably mounted on the swingable seat I2 at 56. Said rockable lever 54 is provided with a handle 58 for manual actuation. Furthermore, said rockable lever 54 is provided with a slot 60 and a notch 62 communicating with said slot 60 at one side thereof. A stationary locking pin 64 or the like mounted on a side wall of the support I is arranged for engagement with said slot 60 on said notch 62. A tension spring 66 stretched between a point 68 of said rockable lever 54 and a point of the seat I2 tends to urge said notch 62 into locking engagement with said locking pin 64 when said locking pin 64 is in register with said notch, as shown in Figs. 1 and 2 in full lines. When the locking pin 64 and the notch 62 are not in register with each other as shown in dash-and-dot lines in Fig. 2, the spring 62 tends to urge the side of the slot 60 communicating with the notch 64 against said locking pin 64'. The notch 62 is arranged at such a point of the lever 54, that said notch 62 is in register with said locking pin 54 when the seat I2 and the other movable members of the chair are in their sitting position. Therefore, when the movable members of the chair are brought from a reclined position into the sitting position, the locking pin 64 snaps automatically into the notch 62 by the action of the spring 66, whereby the movable members of the chair are mechanically locked in the sitting position. If it is desired to bring the movable members of the chair from the sitting position into a reclined position, the rockable lever 54 is swung in counter-clockwise direction (as viewed in Fig. 2) by means of the handle 58, whereby the locking pin 64 is brought into register with the slot 60. Thereupon the movable members of the chair may be brought into a reclined position, as now the slot 60 may slide along the locking pin 64. As, after a release of the handle 58, the spring 66 urges a side of the slot 60 against the locking pn 64, a friction is caused between the lever 54 and the pin 64 which may be of sufficient degree to hold or to assist in the holding of the tion, the rockable lever 54 must be swung by means of the handle 58a about the pivot 56a in counter-clockwise direction so as to bring the locking pin 64a and the slot 60a in register with each other.

Of course, the reclining chair shown in Fig. 1

may also be equipped with another locking demovable members of the chair in any intermediate position.

According to the embodiment of a locking device 52a shown in Fig. 3, the rockable lever 54:; is provided with a slot a communicating with a series of notches 62a. The uppermost notch 32a is arranged in such a position that it snaps automatically into engagement with the locking pin 64a mounted on the support by the action of the spring 66a when the seat l2 and the other movable members of the chair are in their sitting position. The lowermost notch 62a is arranged in such a position that it automatically snaps into locking engagement with the locking pin 64a by the action of the spring 6611 when the seat I2 and the other movable members of the chair are in their extreme reclined position. The arrangement of a series of notches 62a. permits the mechanical locking of the movable members of the chair in several predetermined positions. Of course, each time when the movable members of the chair shall be released from a locked posivice, if desired.

According to the embodiment of a reclining chair shown in Fig. 4, the seat I I2 and the backrest H6 are pivotally connected with each other at H8 at a point coaxial with the pivotal connection H8 between the back-rest H6 and the support IN. The reclining chair comprises on each of its sides a link-chain including a lower connecting link I 22, an intermediate connecting linki12 and a front connecting link I24 pivotally connected with each other at I14 and I16 respectively. The rear end of said link-chain I22, I12, I24 is pivoted to the downward extension I20 of the back-rest H6 at I28. The front end of said link-chain I22, I12, I24 is pivoted to the seat H2 at I30. The movements of the movable members of the link-system formed by the seat H2, the downward extension I20 of the backrest H6, and the link-chain I22, I12, I24 are controlled by a guiding link I32, the upper end of which is pivoted to the support H0 at I34 and the lower end portion of which is rigidly connected with the intermediate connecting link I12.

The movements of a leg-rest I38 swingably mounted on the seat I I2 at I40 are controlled by a controlling link I42, one end of which is pivoted to the leg-rest I38 at I46, and the other end of which is pivoted at I18 to an extension I30 of the lower connecting link I22 projecting beyond the pivotal connection I14 between the lower connecting link I22 and the adjacent intermediate connecting link I12 of the link-chain I22, I12, I24.

The sitting position of the movable members of the chair shown in full lines is limited by a stop I62 mounted on the support IIO for cooperation with the downward extension I20 of the backrest H6. The extreme reclined position of the movable members of the chair shown in dashand-dot lines is limited by the stop I50 formed by an edge of the rear wall of the support IIO cooperating with the back-rest II6.

According to the embodiment of a chair shown in Fig. 5, the back-rest 2I6 is pivoted to the support 2I0 at 2I8. The rear end portion of the seat 2I2 is pivotally connected with the backrest. H6 at 2 I8 at a point coaxial with the pivotal connection 2| 8 between the back-rest 2I6 and the support H0. The rear end of a link-chain comprising a lower connecting link 222 and a front connecting link 224 pivotally connected with each other at 226 is pivoted to the downward extension 220 of the back-rest 2I6 at 220. The front end of said link-chain 222; 224 is pivoted to the seat 2I2 at 230. The movements of the link-system 2I2, 220, 222, 224 are controlled by a guiding link 232 pivoted to the support 2&0 at 234 and pivoted to the lower connecting link 222 at 236.

The movements of a leg-rest 238 swingably mounted on the seat 2l2 at 240- are controlled by a controlling link 242 pivoted at one of its ends to the leg-rest 238 at 246. The other end of said controlling link 242 is pivoted to an intermediate point of 'the front connecting link 224 at 204.

Thus, the movements of the swingable leg-rest 236 are controlled bythe controlling link 242 in dependenceon the. movements of the front con: necting link 2240f the link-chain 222, 224.

The sitting position of 'the movable members of the chair shown in full lines is limited by the upper edge of the support 210 cooperating with the seat 212. The extreme reclined position of the movable members of the chair is limited by the edge 256 of the rear wall of the support 2111 cooperating with the back-rest 216. A

According to the embodiment of a chair shown in Fig. 6, the link-

system

312, 320, 322, 324 swingably mounted on the support 310 at 318, corre-, sponds to the link-system ofthe chair shown in Fig. 5; likewise, the movements of said linksystem are again controlled by a guiding link 332, one end of which is pivoted to the support 310 at 334, the other end of which is pivoted to the lower connecting link 322 at 336.

According to Fig. 6, however, one end of the controlling link 342 is in pivotal connection with the pivotal connection 336 between the lower connecting link 322 and, the front connecting link 324; the other end of said controlling link 342 is pivoted at 346 to the leg-rest 338 swingably mounted on the seat 312 at 340.

The sitting position of the movable members of the chair shown in full lines is limited by the upper edge of the support 310. The extreme re,- clined position of the movable members of the chair shown in dash-and-dot lines is limited by the edge 350 of the rear wall of the support 310.

According to the embodiment of a chair shown in Fig. 7, the rear end portion of a seat 412 is pivoted to the support 410 at 414. A back-rest 416 is pivoted to the support 410 at 418 at a point spaced from the pivotal connection 414 between the seat 412 and the support 416. The linkchain comprises a lower connecting link 422 and a front connecting link 424 pivotally connected with each other at 426. Therear endof said link-chain 422 424 is pivoted to the downward extension 426 of the backer-est 416 at 428, the front end of said link-chain 422,424 is pivoted to the'seat 412 at 430. The movements of the link-system 412, 42 422, 424 are controlled by a guiding link 432 pivoted to the support at 434 and pivoted to the lower connecting link 422 at 436.

The front connecting link 424 is provided with an extension486 projecting beyond its pivotal connection 426 with the adjacent lower connecting link 422 of the link-

chain

422, 424. The controlling link 442 is pivoted to one of its endsto said extension 486 of the front connecting link 424 at 48.8; the other end of said controlling link 442 is pivoted at 446 to the leg-rest 438 swing ably mounted on the seat 412 at 440.

The sitting position of the movable members of the chair is limited by a stop 482 mounted on the support 410 for cooperation with the QOVVI}! ward extension 420 of the back-rest 416. The extremev reclined position of the movable members of thechair is limited by the edge 450 of the rear wall of the support416 cooperating with the back-rest 416.

According to Fig. 8 the back-rest 516 is pivoted tothe support 510 at 518. The seat 512 is pivotally connected with the back-rest 516 at a point coaxial with the pivotal connection 518, between the back-rest 516 and the support 510. The linkchain comprises the lower connecting link 22 and the front connecting link 524 pivotally connected w th ach er a 526-. her r eu i' f said nk hain s voted o. e, downward xtension. 529 02. 1 b ck-rest. at; 5.28. the. front end-ofsaid link-chain 522 is pivoted to the seat 512' at 530, The movements ofthe'link-

system

512, 526, 522, 524 are controlled by a guiding link 532. One end of said guiding link 532 is pivoted to the support 510 at 534, the other end of said guiding link 532 is pivotall connected with the pivotal connection 526 between the lower connecting link 522 and the front connecting link 524..

The front connecting link 524 has an extension 566 projecting beyond the pivotal connection526 between the front connecting link 524 and the lower connecting link 522 and being arranged, at

an angle to the longitudinal axis of the front connecting link 524. One end of the controlling link 542 is pivoted to said extension 565 of the front connecting link 524 at 568. The other end of said controllinglink 542 is pivoted to the legrest 5,318 at 546. The leg-rest 538 is swingahly mounted on the seat, 512 at 540. I

The sitting position of the movable members of the chair shown in full lines is limited by an abutment ofthe downward extension 526 of the backerest 516 against the rear wall of the support 510, The extreme reclined position of the move able membersv of the chair shown in dash-anddot, lines is limited by a hook-like portion 53,6 arranged on the extension 586 of the front connecting link 524 for cooperation with the control insl nk 5 I have described preferred embodiments of ,my invention, but it is understood that this disclosure is for the purpose of illustration, and that various omissions and changes in shape, proportion and arrangement of parts, as well as the substitution of the equivalent elements for the elements shown and described may be made without departing from the spirit and scope of the inven tion as set forth in the appended claims. c

For example, the controlling mechanism of the leg-rest by means of a controlling link pivoted to the leg-rest and a connecting link of a linkchain of a reclining article of furniture may also beapplied to reclining articles of furniture provided with a link-system of a type other than that shown in the drawings; for example, the movements of the movable members of such. a link-system could be controlled by guiding. means in the shape of cooperating sliding means.

Furthermore, each of the chairs shown in Figs. 4+8 may be provided with a locking devicefeither of. the typeshown in Figs. 1 and 2 or of any other type for holding the movable members of the chair in, a. predetermined position. I Moreover, the locking device shown in. Figs. 1 and 2 mayalso be applied to different types of articles of furniture, wherein a movable member of such an article of furniture shall be held or locked. in a predetermined position.

Furthermore, the invention may be applied to articles of furniture other than the type of chairs shown in the drawings, for example, to office chairs, chairs for usein railroad cars, chairs for use in airplanes, lounges, etc.

WhatI claimis: v

. 1. An articleof repose for supporting the body of a person comprisingin combination; a support, a. constrained linkage having stationary link-meansand a plurality of movable links, said stationary link-means being included. in, said support, said movable links including a seatmember, a downward extension of a. back-rest member, a guiding means anda chain of connect: inglinks includinga, lower connectingv link at one end ofthe chain and a front connectin linkgat the. other endof: the chain,v at least; one of. said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the backrestmember, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to one of said connecting links, and the other end portion of said controlling link being pivoted to said leg-rest.

2. In an article of repose for supporting the body of a person as claimed in claim 1, said guiding means being engaged with the lower connecting link.

3. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a, downward extension of a back-rest member, a guiding link and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting link at the other end of the chain, at least one of said connecting links being arranged below the plane of the seat-member, the upper end of said guiding link being pivoted to said support, the lower end of said guiding link being connected with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the backrest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to one of said connecting links, and the other end portion of said controlling link being pivoted to said leg-rest.

4. In an article of repose for supporting the body of a person as claimed in claim 3, said guiding link being connected with the lower connecting link. 4

5. An article of respose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seat-member, a downward extension of a back-rest member, a guiding means and a, chain of connecting links including a, lower connecting link at one end of a chain and a front connecting link at the other end of the chain, at least one of said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the back-rest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said backrestand seat-members with said support, a legrest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being ivoted to said lower connecting link, and the other end portion of said controlling link being pivoted to said leg-rest.

6. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means-being included in said support, said movable links including a seat-member, a, downward extension of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting link at the other end of the chain, at least one of said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to th downward extension of the backrest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to an intermediate point of the lower connecting link, and the other end portion of said controlling link being pivoted to said legrest.

7. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a downward extension of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting link at the other end of the chain, said lower connecting link and said front connecting link being pivotally connected with each other, at least one of said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the back-rest member, said front connecting link being pivoted to the front portion of said seatmember, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivotally connected with said lower connecting link in coaxial alignment with the pivotal connection'between the lower connecting link and the front connecting link, and the other end portion of said controlling link being pivoted to said leg-rest.

8. In an article of repose for supporting the body of a person as claimed in claim '7, said guiding means being engaged with the lower connecting link.

9. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a downward extension of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connectin link at the other end of the chain, said lower connecting link having an extension projecting beyond its pivotal connection with the adjacent connecting link, at least one of said connectin links being arranged below the plane of the seatmember, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the back-rest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, on end portion of said controlling link being pivoted to said extension of the lower connnecting link, and the other end portion of said controlling link being pivoted to said leg-rest.

10. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a downward extension of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting link at the other end of the chain, at least one of said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the back-rest member, said front connecting link being pivoted to the front portion of said seatmember, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to said front connecting link, and the other end portion of said controlling link being pivoted to said leg-rest. v

11. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a downward extension of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting link at the other end of the chain, at least one of said connecting links being arranged below the plane of the seat-member, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the backrest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to an intermediate point of said front connecting link, and the other end portion of said controlling link being pivoted to said legrest.

12. An article of repose for supporting the body of a person, comprising in combination: a support, a constrained linkage having stationary link-means and a plurality of movable links, said stationary link-means being included in said support, said movable links including a seatmember, a downward extension'of a back-rest member, a guiding means and a chain of connecting links including a lower connecting link at one end of the chain and a front connecting. link at the other end of the chain, said front connecting link having an extension projecting beyond its pivotal connection with the adjacent connecting link, at least one of said connecting links being arranged below the plane of the seatmember, said guiding means being connected to said support and engaged with at least one connecting link of said chain of connecting links, said lower connecting link being pivoted to the downward extension of the back-rest member, said front connecting link being pivoted to the front portion of said seat-member, means pivotally connecting at least one of said back-restand seat-members with said support, a leg-rest swingably mounted on the front portion of the seat-member, and a controlling link, one end portion of said controlling link being pivoted to ,said extension of the front connecting link, and the other end portion of said controlling link being pivoted to said leg-rest.

ANTON LORENZ.

REFERENCES CITED The following references are of record in the file of this patent:

' UNITED STATES PATENTS Number Name Date 667,363 Giess Feb. 5, 1901 988,600 Simpson Apr. 4, 1911 2,090,579 Grinnell Aug. 17, 1937 2,200,647 Vanderploeg May 14, 1940 2,221,268 Sears Nov. 12, 1940 2,227,597 Luckhardt Jan. 7, 1941 2,431,670 Anderson Dec. 2, 1947 2,433,521 Lorenz Dec. 30, 1947 2,472,854 Lorenz June 14, 1949 2,478,769 Lorenz Aug. 9, 1949 2,478,770 Lorenz Aug. 9, 1949 FOREIGN PATENTS Number Country Date 872,705 France June 17, 1942