US2612937A

US2612937A - Reclining article of furniture

Info

Publication number: US2612937A
Application number: US708311A
Authority: US
Inventors: Lorenz Anton
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-11-07
Filing date: 1946-11-07
Publication date: 1952-10-07
Anticipated expiration: 1969-10-07
Also published as: GB629494A

Description

Get. 7, 1952 A. LORENZ RECLINING ARTICLE OF FURNITURE Filed Nov. 7, 1946 3 Sheets-Shoot 1 FIG. I

I N VENTO R IQVm/V lea /v2 12 H I S ATTORNEY Oct. 7, 1952 A. LORENZ: 2,612,913?

RECLINING ARTICLE OF FURNITURE Filed Nov. '7, 1946 3 Sheets-Shut 2 INVENTOR filyra/v ZOPi/VZ BY ms ATTORNEY Oct. 7, 1952 A. LORENZ 2,612,937

RECLINING ARTICLE OF FURNITURE Filed Nov. '7, 1946 3 Shoots-Sheet 3 FIG. 6

INVENTOR fl/vm/v law/Z HIS ATTORNEY Patented Oct. 7, 1952 UNITED STATES PATENT" OFFICE REGLINING ARTICLE QF FURNITURE AntonLorenz, BuffaloiN Yn Application November 7, 1946; S'8ri31l N: 7083I1i This-e invention relates to articles of furniture, and more particularlyto reclining articles offurniture; wherein a seat, a back-rest and a linkchaincomposedpf-a plurality of connecting links form movablemembers of alink-system swing ably mounted on a support; and wherein the movements of a leg=rest swingably mounted on the seatlare controlled by a controllingmechanism in dependence on the movements: of a tion ofvarioustdevices, elements and parts, as

set. forth in the claims hereof; certain: embodiment'sofi thersame being described in the speoification and being illustrated in the accompanying drawings forming part of this" specification; wherein: u v

Eig; 1 is; a sideelevationaliview of an" adjustable recliningchair according to the invention,

Fig.3 is a sectional view taken on line. 2--2 of Fig: 1, illustrating: a locking device,

Fig. 3 is aside elevational View: of a difierent embodiment of an: adjustable reclining l chair according to the invention,

Fig) l is aside elevational view of another embodiment of an adjustable:recliningchair according to the invention,

Fig; 5' is aside elevaticrial view of a further modification ofan adjustable reclining chair according" to the invention;

Fig; S is a side elevational view of adifferent embodiment-of an adjustable reclining chair; according to the invention, and i 11 Claims. (01. 1551-4111) Fig; 1,.oneendz'yof the-guiding link 3fi-- isapivoted Fig. '7 is a sideelevational view of another ema: point spaced 'fromthe-pivotal connection I lit-116* tween the back-rest!4and"thersupport Ill; The adjustable; reclining chain comprises at each of its :sides-a link-chaiii including aifront connecting link 2:2; an intermediate connecting link-L24 anda' top connecting link-dfi'; said connecting linksare pivotallyconnected; with. each 'otherat 2B amid-3D; respectivelyt The: frontend of v the: link+chaim i. e: the'ilower sendportion; 'ofithe front connect. ing link2-2 is pivotedi to the seat l8iat-l32; the rear end? of the: link-chain, i. he, the. rear-end.-portion: of the top: connecting link 26?- is pivoted to an intermediate point of the backfrestnlitiabove the pianewof the seat IB atIME. Said-seat l said i link-chain 22; 24 28 and i, said backrrest i4! form;

the movable members: 05 a link-system" swingably mounted jon the: support ln-iasdescribed above. The movements of the movable .members.-of-- -said link system are; controlled by guiding means-or a guidinglinls: 3% associated with thesupport Hl'and a link oh the; link-chain; according to tothe support It atltmthewother end of saidg-uidr ing link 364s rigidly connected with the intermee diate connecting'link;241i l Aleg-rest w-swingably mounted on the; front portion, ofzthe seat )1 81- at 4 2 has an upwardextreme sion Mien eachisi'd'e of'the'chair.v Said upward extension 44 integral'iwith the IQgfIEStADrDIQjQCtS beyond the, pivotal connection: 42- between the leg-rest? M1? and: the: seat 1 B: Furthermore, each top connectingrlinlo lfiahas aiforwardzextensionMi projecting beyond the} pivotal connection 30 of the top connecting, link fifiiwith-thedntermediate connecting: links--25. Said; forward" extension. 46 of the top: connecting: link: 2 6: isintegral with the latter. Oneach sideinof': the chair, one endof a controlling link dSisrpivoted to said forward ex+ tension 46 of the toplconnecting1ink at50;.the other end ofsaidfcontrolling: link d8 is pivoted to theupwardl extension 4 1 of the; leg-rest at; 52. Thus, the movements of: the swingable leg-rest 40 are controlled by the controllingdinkrfifl in des pendence on the movements of thetop connecting link 26 of: the links-chain 22;; 2.4, 26;

The sitting position oft-the movablelmembersrof the chair is limited by a stop 54? mounted: on the support I for cooperation with thecseatfl I8. When theoccupant of the chair leans the Weight of his body against the back-rest: M 1 and swings same into a reclined position", for example; the extreme reclined; position ill-l" limited; by a stop 56 mounted on the support Ill for cooperation with theback-rest, the seat |8=is swungintothe reclinedposition 18" throughathei medium of 3 above described link-system, and the leg-rest 40 is brought into the almost horizontal position 46' through the medium of the controlling link 48 arranged between the leg-rest 46 and the top connecting link 26.

According to Figs. 1 and 2, the adjustable reclining chair is provided with a locking device generally indicated by 58, by means of which the movable members of the chair may be held in any desired position. Said locking device 53 comprises a handle 66 screwed on the threaded end of the pivot 34 between the back-rest I4 and the top connecting link 26. Said pivot 34 has a head 62 resting against a surface of the back-rest I4.

. A square portion 64 of the pivot 34 inserted into a corresponding square aperture of the back-rest I4 prevents the pivot 34 from rotation when the handle 68 is rotated. When the user of the chair loosens said locking handle '66, the surface of the hub 66 of said handle is disengaged from the surfaceof the top connecting link 26, so that the movable members of the chair may be freely moved from one position into another one. When the locking handle 66 is tightened, the surface of the hub of the handle is pressed against the top connecting link 26, whereby the latter is pressed against the back-rest I4 engaged with the head 62 of the pivot 34, so'that the members of the chair are held in their position. Of course, any other locking device may be arranged on the pivot 34 or at any other suitable part of the chair for holding the movable members of the chair in a desired position.

The adjustable reclining chair shown in Fig. 3 comprises a support H6 in the shape of a casing. The back-rest H4 and the seat H3 are co-' axially pivoted to the support at H6. The linkchain pivoted to the back-rest I I4 at I34 and pivoted to the seat H6 at I32 comprises only two connecting links, i. e. a top connecting link I26 and a front connecting link I22 pivotally connected with each other at I68. The movements of the movable members of the link-system formed by the back-rest II4, the seat H8, the front connecting link I22 and the top connecting link I26 are controlled by a guiding link I3 the lower end of which is pivoted to the support at I38 and the upper end of which is pivoted to the top connecting link I26 at I16. I

The movements of a leg-rest I48 swingably mounted on the seat I I8 at I42 are controlled by a controlling link I48,'one end of which is pivoted to an intermediate point N2 of the top connecting link I26 between the pivotal connections M4 and I68 of the latter with the back-rest I I4 and the adjacent front connecting link I22 respectively; the other end ofsald controlling link I48 is pivoted at I52 to an upward extension I44 of the swingable leg-rest I40.

The sitting position of the movable members of the chair shown in full lines is limited by a stop I 54 arranged on the support I II] for cooperation with the seat; the extreme reclined position of the movable members of the chair shown in dash and dot lines is limited by a stop I56 arranged on the support III] for cooperation with the back-rest I I4.

The movable members of the chair may be held in any desired position by a locking device I58 of the type shown in Fig. 2.

The adjustable reclining chair shown in Fig. 4 comprises a support 2 I6 in the shape of a casing. The link-system 2 I4, 2 I8, 222, 226 swingably mounted on the support 2 I6 at 2 I6 and the guiding link 236 pivoted to the support 2I0 at 233 and 4 pivoted to the top connecting link 226 at 216 correspond entirely to the link-system and the guiding link of the chair shown in Fig. 3.

According to Fig. 4, however, one end of the controlling link 248 is pivoted to an intermediate point 212 of the front connecting link 222 between the pivotal connections 232 and 268 of the latter with the seat 2I8 and the adjacent top connecting link 226 respectively; the other end of said controlling link 248 is pivoted at 252 to the upward extension 244 of the leg-rest 248 swingably mounted on the seat 2I8 at 242. Thus, the movements of the swingable leg-rest 240 are controlled by the controlling link 248 in dependence on the movements of the front connecting link 222 of the link-chain 222, 226. v

The sitting position of the movable members of the chair shown in full lines is limited by a stop 254 arranged on the support for cooperation with the seat 2 I 8; the extreme reclined position of the movable members of the chair is limited by a stop 256 arranged on the support 2I6 for cooperation with the back-rest 2 I 4.

The movable members of the chair may be held in any desired position by means of a locking device 258 of the type shown in Fig. 2.

According to the embodiment of a chair shown in Fig. 5, again the link-system 3I4, 3I8, 322, 326 swingably mounted on the support 3 I6 at 3 I 6 corresponds to the link-system of the chair shown in Fig. 3; likewise, the movements of said linksystem are again controlled by a guiding link 336, one .end of which is pivoted to the support 3H] at 338, and the other end of which is pivoted to the top connecting link 326 at 316.

Accordingto Fig. 5, however, one end of the controlling link 348 is hinged to the pivotal connection 368 between the front connecting link 322 and the top connecting link 326; the other end of said controlling link 348 is pivoted at 352 to an upward extension 344 of the leg-rest 348 swingably mounted on the seat 3| 8 at 342.

The sitting position of the movable members of the chair is limited by a stop 354 arranged on the support 3 I 0 for cooperation with the seat 3 I 8; the extreme reclined position of. the movable members of the chair is limited by a stop 356 arranged on the support 3H! for cooperation with the back-rest 3 I 4.

The adjustable reclining chair shown in Fig. 6 comprises a support M6 in the shape of a casing. The lower end portion of a back-rest 4I4 is pivoted to the support M6 at M6 at a point spaced from the pivotal connection 426 between the seat 4I8 and the support 4I6. The link-chain comprises a front connecting link 422 and a top connecting link 426 pivotally connected with each other at 468. The lower end of the front connecting link 422 is pivoted to the seat 4I8 at 432, the rear end of the top connecting link 426 is pivoted to the back-rest 4I4 at 434. The movements of the movable members of the link-system M8, 422, 426, M4 are controlled by a guiding link 436 pivoted to the support 4H] at 438 and pivoted to the top connecting link 426 at 416.

According to Fig. 6, the front connecting link 422 has an upward extension 414 projecting beyond the pivotal connection 463 of the front connecting link 422 with the adjacent top connecting link 426. The controlling link 443 is pivoted at one of its ends to said upward extension 414 of the front connecting link 422 at 416; the other end of the controlling link 448 is pivoted at 452 to an upward extension 444 of the leg-rest 446 swingably mounted on the seat 4I8 at 442.

demoed Thea sitting: position; of; the: movable members or theiichairi'isqlimited by-"a stop: 454i arranged on the? support 4z|.u::for: cooperation; with the seat a the: extreme.- re'clined: position: of: the. movableemembers oi. the: chair is. limited. by a: stop 45E arranged on; the support 4111 ion: cooperation withsthe b'aclir-restl 4414i.

The rmovablememioersrof the chair. may-v be" held inzany desired: position: byiim'eans ot a locking device: 458 of the. type: shown; in .lffig: 2.

According "toithe embodiment of an; adjustable reclining chainshownihFigaZ, thezsupport 510 comprises: two: side fire-mes. connected: withtea'ch.

otherby cross bars 5112-. Thebach-restfizm and the: seat 518: are coaxially pivoted to; the: support lfi:at5 lfii. Thelinkschain'comprisessaifrontcnne necti-ngilinki 522:, anintermediateconnectingilink 524': and altop connecting' link 52.6.. Connecting links of? theilinkz-chain are pivotally connected with each other: at'52l8 and 530 respectively; The front connecting link 522: is; pivoted; to: the seat 5 l 8. at 532.,the. top connecting link 52 6' iSIp'lVOIt'Bd tothabaolc-rest: 5M atlfifillz. One end =of a gui ding' link: 5315; is pivoted; to? the support. Fdfl; at 533, the other end i of said: guiding: link 536 is rigidly connected withthe intermediate connecting link 52 2 of the link-chain. forrcontrolling the movements ofthesmovable members: ofth'e link-system 5| 4, 518:, 522:, 524 5:28.

According: to; Eigzfl, the? frontconnecting link 522' has a. downward: extensionjllfl I proj eoting: oeyondiits (pivotal connection 1 532 with the seat 513; One" EIlTd Oil the; controlling link' 5483 isupivoted. at. 530 to; said dowmvard extension 578 of the front connecting liiil :.1522;: the-I other end of said controlling. link 548115 pivoted. at: 5821 to an intermediate point of. the; legerestt 54p sWinga-blv mountediona the front: portion at the seat 518 at 54 2i.

The sitting position. oi? the: movable members of the: chair shown. in full lines is limited a stop 5511 anranged:onthesupport' 5 III) for coopera ticnr with the seatifi'td; theextremereclined posi tion: oftiie movable members of: the chair shown ins dash. and? dottlines: is limited by the stop. 5% arrangediom the support 55a for cooperation with the? back-west: 5114:; the movable members of the chair may be held in any desired positionby a locking device 558 of the type shown inFig; 2;

I; have described preferred embodiments of my invention, but: it: is understood that this dis closure? is; for the purpose of illustration, and that various-omissions andchanges'in shape, pro-- portion:andamrangement of parts, as Well as the substitution of equivalent. elements for the arrangements: shown and described maybe made without: depanting: from the spirit and scope oi? the invention as set forth in the appended claims.

For example; the controlling mechanism of the leg-rest by means of a controlling link pivoted to theleg-rest and a connecting link. of a link-chain of a' reclining article of furniture may be applied also. to? reclining articles of furniture providedwitha linki-system of a different type than that shownin the diva-wings; ion example, the movemerits of themovablei members of such a linksystem could. be controlledwby guiding means in. the shape of. cooperating; sliding means.

Furthermore, the. invention may be: applied to other articles of furniturethan the i type. of. chairs shown. the. drawings,v for: example tooffice chairs, chairs. for use in. railroad cans, chairs for. use airplanes, l'oungets, etc."

1'. An article-of reposeifor supporting theibodyof avperson; comprising in: combination: a sup:- port; a constrained; linkage havingstationary link-means and a plurality of movable link-s, said" stationary link-meansbeing-included insai'dtsupiport, said movable. links including. a seat" memher; a back-rest member, guiding means: and: a. chainof connecting linksin'cluding' a top: connectinglink" atone end of the chain anda front connecting link at the other: end'of thecfiain, at least one-of saidconne'cti'ng links being arranged above the plane ofthe seat-member, said guiding means being connected to said": support and being engaged with at least one connecting link of said chain of con necting links; said top connecting link being pivoted to an intermediate point of the back i'estmember, saidfront connecting-"link be-- ing pivoted to the front'portion ofsaid seat-mom her; means pivotally'connecting at least one-of said back-rest and seat-members with said support, a leg-rest swingably mounted onthe front portion of said seat-member, and a controlling link; one endportion" of said controlling Moshe-- ing pivoted to one of said connecting links, and the other end portion of said controlling link being pivoted tothestructureof said leg-rest.

2: An article of repose fonsupportingthe body of a person, comprising in combination: a support, a' constrained linkage having stationary'link me'ans'and a plurality of'mova-ble links, said stationary linlc means being included in said sup port, said movable links including a seat-member; a hack-rest.v member; a guiding link and a chain of connecting links including a top connecting lin'lctat one end of the chain and afront connecting link at the: other end" of the chain, at least one of said connecting; links" being arranged. above the plane of the seat member; the lower. end of said guiding linkbeing pivoted to said support, the upper end of said guiding link being connected with at least'one connecting-link of said chain of connecting links, said top connecting link' being; pivoted to an intermediate point 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 saidback-rest andiseat-mernbers with said support, a leg-rest swingahl'y mounted on the front portion of said. seat-member, and a. controlling; link,v one end. portion of, said controlling link being pivoted toloneioi said connectingjlinks, and the other end portioniofsaidlconetrolling link beingpivoted to the. structure of said leg-rest;

3. An article. of reposeifon supporting the body. of. a person; comprising in combination-z a support, i a constrained linkage having stationarylink means and atplurality of.- mouable links; said stationary link means beingincludedin saidisupport; saidr movable; links including atseat-mcmben, aback-restmember, guiding means-and a chain of connecting links-including. a top connecting; link at oneend of theohainand a front connecting link at the other end. oft the. chain; at least one of said connecting linhs-beingarrangedabovethe. plane. of the seat-member, said. guiding means being. connected tosaid: support and being en.- gaged With; atleast: one; connecting;- link of' said chain of. connecting link-s, said; topconnecting; linlc being pivoted to ancintermediate. point Off the back-rest member, said front connecting; link being pivoted to the front portion of. Saidi seats member,v means. pivotally connecting'at-least one.

of said back-rest and seat-members with said support, a leg-rest swingably mounted. on the front portion of said seat-member, the structure of said leg-rest including an upward extension projecting beyond the pivotal connection between the leg-rest and 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 extension of the leg-rest.

4;. 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 sup port, said movable links including a seat-member, a back-rest member, guiding means and a chain of connectin links including a top 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 above the plane of the seat-member, said guiding means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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-rest and seat-members with said support, a leg-rest swingably mounted on the front portion of said seat-member, and a controlling link, one end portion of said controlling link being pivoted to said top connecting link, and the other end portion of said controlling link being pivoted to the structure of said leg-r st.

5. An article of repose for supporting the body of a person, comprising in combination: a sup-- port, a constrainedlinkage 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 back-rest member, guiding means and a chain of connecting links including a top 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 above the plane of the'seat-member, said guiding means bein connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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-rest and seat-members With said support, a leg-rest swingably mounted on the front portion of said seat-member, the structure of said leg-rest including an upward extension projecting beyond the pivotal connection between the leg-rest and the seat-member, and a controlling link, one end portion of said controlling link being pivoted to said top connecting link, and the other end portion of said controlling link being pivoted to said extension of the leg-rest.

6. An article of repose for supporting the body of a person, comprisingin 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 back-rest member, guiding means and a chain of connecting links including a top connecting link at one end of the chain and a front connecting link at the other end of the chain,

said top connecting link having an extension projecting beyond its pivotal connection with the adjacent connecting link, at least one of said connecting links being arranged above the plane of the seat-member, said guidin means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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 backrest and seat-members With said support, a legrest swingably mounted on the front portion of said seat-member, the structure of said leg-rest including an upward extension projecting beyond the pivotal connection between the leg-rest and the seat-member, and a controlling link, one end portion of said controlling link being pivoted to said extension of the top connecting link, and the other end portion of said controlling link being pivoted to said extension of the leg-rest.

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 seat member, a back-rest member, guiding means and a chain of connecting links including a top 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 above the plane of the seat member, said guiding means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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-rest and seat-members with said support, a leg-rest swingably mounted on the front portion of said seat-member, and a controlling link, one end portion of said controlling link being pivoted to an intermediate point of said top connecting link, and the other end portion of said controlling link being pivoted to the structure of said leg-rest;

8. 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 back-rest member, guiding means and a chain of connecting links including a top 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 above the plane of the seat member, said guiding means being connected to said support and being engaged With at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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-rest and seat-members with said support, a leg-rest swingably mounted on the front portion of said 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 the structure of said leg-rest.

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 seat-member, a back-rest member, guiding means and a chain of connecting links including a top 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 above the plane of the seat-member, said guiding means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connect- V ing link being pivoted to an intermediate point 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-rest and seat-members with said support, a leg-rest swingably mounted on the front portion of said 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 the structure of 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 seat-member, a back-rest member, guiding means and a chain of connecting links including a top 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 above the plane of the seat-member, said guiding means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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 rest and seat-members with said support, a legrest swingably mounted on the front portion of said seat-member, and a controlling link, one

end portion of said controlling link being pivoted to the extension of said front connecting link, and the other end portion of said controlling link being pivoted to the structure of said leg-rest.

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 seat-member, a back-rest member, guiding means and a chain of connecting links including a top connecting link at one end of the chain and a front connecting link at the other end of the chain, said top connecting link and said front connecting link being pivotally connected with each other, at least one of said connecting links being arranged above the plane of the seat-member, said guiding means being connected to said support and being engaged with at least one connecting link of said chain of connecting links, said top connecting link being pivoted to an intermediate point 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-rest and seat-members with said support, a leg-rest swingably mounted on the front portion of said seat-member, and a controlling link, one end portion of said controlling link being pivotally connected with said front connecting link in coaxial alignment with the pivotal connection between the top connecting link and the front connecting link, and the other end portion of said controlling link being pivoted to the structure of the leg-rest.

ANTON LORENZ.

REFERENCES CITED The following references are of record in the