US2958371A

US2958371A - Adjustable chairs

Info

Publication number: US2958371A
Application number: US564473A
Authority: US
Inventors: Fletcher Peter Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-02-09
Filing date: 1956-02-09
Publication date: 1960-11-01
Anticipated expiration: 1977-11-01

Description

Nov. '1, 1960 Filed Feb. 9, 1956 P. S. FLETCHER ADJUSTABLE CHAIRS 5 Sheets-Sheet 1 INVENTOR.

Pefev' Siwarf 1 792 0 767 Nov. 1, 1960 P. s. FLETCHER ADJUSTABLE CHAIRS 5 Sheets-Sheet 2 Filed Feb. 9, 1956 g l/l/ S \J 3 4 2 IN VEN TOR. Pe-Zer sz ewar'i Fl k m. Q'C FO 777635.

Nov. 1, 1960 P. s. FLETCHER ADJUSTABLE CHAIRS 5 Sheets-Sheet 3 Filed Feb. 9. 1956 Nov. 1, 1960 P. s. FLETCHER 2,958,371

ADJUSTABLE CHAIRS Filed Feb. 9, 1956 5 Sheets-Sheet 4 H M/[H I /l/Xl INVENTOR.

P. S. FLETCHER ADJUSTABLE CHAIRS Nov. 1, 1960 Filed Feb. 9, 1956 5 Sheets-Sheet 5 INVENTOR. l eier' Szewarf FZQfcfier QOTWySI Patented Nov. 1, 1960 ADJUSTABLE CHAIRS Peter Stewart Fletcher, Boynton Beach, Fla., assignor to Anton Lorenz, Boynton Beach, Fla.

Filed Feb. 9, 1956, Ser. No. 564,473

11 Claims. (U. 155-106) This invention relates to adjustable chairs which may be adjusted from a normal sitting position into a tilted position during which a leg rest is elevated to a position in front of the seat.

An object of the invention is to provide an improved tilting chair in which the leg rest or leg-supporting platform is normally disposed below the front of the seat but is automatically elevated into leg-supporting position when the chair is operated into a tilted position; which will have simple, dependable and effective mechanism for operating the leg rest or leg-supporting platform into and out of its effective leg-supporting position; which will employ novel and simple mechanism; and which will be relatively durable, compact and inexpensive.

Other objects and advantages will be apparent from the following description of several embodiments of the invention and the novel features will be particularly pointed out hereinafter in connection with the appended claims.

In the accompanying drawings:

Fig. 1 is a side elevation of a chair constructed in accordance with this invention, but with a side removed by a section just inside the chair in order to illustrate the mechanism employed for extending the leg rest, the parts being shown in the position occupied when the chair is in sitting position.

Fig. 2 is a similar view but with the parts in the tilted position;

Fig. 2a is a schematic diagram illustrating the action of the linkage of Figs. 1 and 2 used to extend the leg rest;

Fig, 3 is a view similar to Fig. l, but illustrating a modified arrangement of the linkage by which the leg rest is extended and the seat is tilted when the chair is operated into its tilted position, the parts being shown in their normal sitting position;

Fig. 4 is a view similar to Fig. 3, except that the parts are in their tilted positions;

Fig. 4a is a schematic diagram illustrating the linkage employed in Figs. 3 and 4 to extend the leg rest;

Fig. 5 is a View similar to Figs. 1 and 3 but illustrating still another modification of the linkage employed;

Fig. 6 is a view similar to Fig. 5 except that the parts are in their tilted positions;

Fig. 6a is a schematic diagram illustrating the linkage employed in Figs, 5 and 6 to elevate the leg rest;

Fig. 7 is a view similar to Figs. 1, 3 and 5, except that it illustrates another modification of the invention;

Fig. 8 is a view similar to Fig. 7, except that the parts are in their tilted positions;

Fig. 8a is a schematic diagram illustrating the linkage employed in Figs. 7 and 8 to elevate the leg rest;

Fig. 9 is a view similar to Figs. 1, 3 and 7, except that still another modification of the linkage is illustrated;

Fig. 10 is a view similar to Fig, 9, but with the parts in their tilted positions; and

Fig. 10a is a schematic diagram illustrating the linkage employed in Figs. 9 and 10 to elevate the leg rest.

In the embodiment of the invention illustrated in Figs.

1, 2 and 2a, the chair includes a support 1 having upright sid'e members 2 that are spaced apart but connected by

base members

3 and 4. A seat 5 and a back rest 6 are disposed between the side members 2 of the support. The back rest is pivoted on a pivot or pin 7 adjacent its lower part, which pivot or pin 7 is carried by the support 1. The seat 5 is also pivoted at its rear end on the same pivot or pin 7. The seat 5, however, can be rocked on its pivot 7 independently of the back rest 6. A legsupporting platform or rest 8 is disposed between the side members 2 of the support 1 below the forward edge of the seat 5 when the chair is in its normal sitting position, and this le -supporting platform is mounted on a lazy tong device. This lazy tong device includes three pairs of links at each side of the seat which are carried by the support 1 and which in turn support the leg rest 8 and extend or retract it as desired.

These three pairs of links include one pair formed of links 9 and it} which are hinged together by pivot or pin 11. The link 9 is pivotally connected by a pivot 12 to the support 1. The other link 10 is connected at its free end by pivot pin 13 to the leg rest 8. Another pair of links includes links 14 and 15 which are hinged together by a hinge 16. The free end of the link 14 is pivotally connected by a pin 17 to the support 1, and the link 15, at its free end, is pivotally connected by a pin 18 to one end of a link 19 of another pair of links. The other link 29 of this last pair is connected to the link 19 by a hinge 21, and the free end 20 is connected by the pivot pin 22 to the leg rest 8 below the pivot pin 13 by which the link 10 was connected to the leg rest. The link 14 is provided with an extension 23 beyond its hinge 16 and the extension is pivotally connected by pin 24 to the link 10 intermediate of the ends of the latter. The link 19 of the third mentioned pair of links is pivotally connected intermediate of its ends by pivot pin 25 to the link it between the leg rest and the pivot pin 24,

It is to be observed that these three pairs of links at each side of the seat provide a lazy tong device for supporting the leg rest 8 from the support 1, and the links are so interconnected that we have a plurality of successive quadrilaterals of links arranged in succession or tandem with the leg rest 8 forming part. of one quadrilateral of links, and with the support 1 forming with the links of an end pair of links a third quadrilateral that is arranged in tandem with the other two quadrilaterals. Thus, if any one of the links of any quadrilateral of links is operated back and forth, the lazy tong device formed of the succession of three quadrilateral linkages will cause the leg to be extended upwardly and forwardly into the supporting position shown in Fig. 2 or retracted beneath the forward edge of the seat 5.

To operate this lazy tong device a connecting link 26 is pivotally connected by a pin 27 to one of the links, such as the link 9, the other end of the connecting link 26 being pivotally connected by a pin 28 to an arm 29 which depends from the back rest 7 below the pivot pin 7 on which the back rest may tilt. Thus, when the back rest 6 is moved rearwardly at its upper end, its lower end will move the link 26 endwise to the left in Figs. 1 and 2, and thus rock the link 9 to the left in Figs. 1, 2 and 2a and cause an extension of the lazy tong that elevates the leg rest 8 to a position in front of the seat 5, as shown in Fig. 2. In order to support the forward edge of the seat 5 and also elevate that forward edge when the back rest 6 is moved into a tilted position, the seat 5 is provided with a descending lug .30 at each side of the seat, and each lug 30 at its lower end mounts a roller 31 on a rolling pivot 32, and this roller 31 rolls on the adjacent connecting link 26.

The link 26 therefore serves to support the seat 5 because the lug 30 is disposed forwardly of the pivot 7 on which the seat is mounted to rock or tilt. Then, when the back rest 6 is moved into a .tilted position, it automatically causes an extension of the lazy tong device and an elevation of the leg rest 8 into a position approximately at the level and in front of the forward edge of the seat 5, and because the link 26 rises during this movement, that link will act through the roller 8 and lug 30 to elevate the forward edge of the seat 5, as shown in Fig. 2. When the back rest 6 is returned to its upright or sitting position, shown in Fig. 1, it will pull endwise on the link 26 and retract the leg rest to its sitting position, shown in Fig. 1, and lower the front edge of the seat 5.

Referring next to the embodiment of the invention illustrated in Figs. 3, 4 and 4a, the back rest 6 and the seat are mounted on the support 1 between the side members 2, as illustrated in Figs. 1 and 2, with the back rest and seat both pivoted to the support 1 on the common pivot 7. The back rest has a descending arm 29 and the connecting or actuating link 26 also as in Figs. 1 and 2. The leg rest 8 is mounted on the lazy tong device with its normal position below the forward edge of the seat 5 when the back rest 6 is in its sitting or upright position. In this embodiment of the invention the lazy tong arrangement also includes three pairs of interconnected links at each side of the seat 5. One pair includes

links

33 and 34 which are hinged together by a pin 35. The free end of link 33 is connected pivotally by pin 36 to the support 1, and the free end of the link 34 is pivotally connected by pin 37 to the leg rest 8. Another pair of links includes the

links

38 and 39 which are pivotally connected together by pivot pin 41). One end of the link 38 is pivotally connected by pin 41 to the support 1. 7 Still another pair of the links includes the

links

42 and 43 which are pivotally connected together at 44. One end of the link 42 is pivotally connected by pin 45 to the free end of the link 39, and the free end of the link 43 is pivotally connected by pivot 46 to the leg rest 8 somewhat above the pivot pin 37. The link 38 is provided, beyond its hinge pin 40, with an extension 47 which is pivoted at 48 to the link 34 intermediate of the latters ends. The link 42 of the third pair of links is also provided beyond its pivotal connection 44 with an extension 49, and the extension is pivotally connected by a pin 50 to the link 34 between the leg rest connection and the pivot pin 48. From this it will be observed that we again have three pairs of quadrilateral linkages at each side of the seat arranged in tandem between the support 1 and the leg rest 8, because the leg rest 8 forms one end of each lazy tong device and the support 1 forms the other end of the same device. This lazy tong device thus mounts the leg rest 8 from the support 1 in a position to be extended in a manner to elevate the leg rest 8 to a position in front of the seat 5, or to retract it to its normal, inactive position shown in Fig. 3.

The link 26 which is operated by the back rest 6 when the latter is pulled into a tilted position is pivotally connected to the link 33 of the first pair of link by a pivot pin 51, so that operation of the back rest 6 causes the lazy tong device to be extended or contracted, and thus raise or retract the leg rest 8. In this embodiment, instead of having rollers on the seat ride on the actuating link 26, the seat is provided at each side with a lug 52, Fig. 4, that depends from the seat, and a seat control link 53 is pivotally connected at one end by a pin 54 to the lug 52, and at its other end is connected by a pivot pin 55 to one arm of a bell crank lever 56 which is pivoted at 57 on the support 1, the other arm of the bell crank lever 56 being pivotally connected by pin 58 to one end of a link 59, the other end of which is connected by a pin 60 to the link 33 of the first pair of links, and which is actuated by the link 26.

. The pin 60 is disposed between the pivot pin 51 and the pivot 36 that connects the link 33 to the support 1. Thus, when the link 33 is moved to the left in the drawings by operation of the link 26 from the back rest 6, this movement of the link 33 will also operate the bell crank lever to lift the forward edge of the seat 5 a small amount, and when the back rest 6 is returned to its upright or sitting position, a reverse movement of the lazy tong device will lower the forward edge of the seat 5 from the Fig. 4 position to the Fig. 3 position.

In the embodiment of the invention illustrated in Figs. 5, 6 and 6a, the back rest 6 and seat 5 are hinged on a common pin 7 to the support 1 between the side members 2, as in Figs. 1 to 4, and a leg rest 8 is disposed in its normal, inactive position below the forward edge of the seat 5, as shown in Fig. 5. The back rest also has the same descending arm 29 which is connected by a pivot pin 28 to an actuating link 26. A slightly different arrangement of links in the lazy tong arrangement is illustrated, and includes one pair of

links

61 and 62 which are hinged together by a hinge 63. One end of the link 61 is connected by a pin 64 to the support 1. Another pair of links includes the link 65 which is hinged at 66 to the support 1, and the link 67, which is hinged to the link 65 by a hinge 68.

Still another pair of links includes the

links

69 and 70 which are hinged together with a hinge 71. The free end of the link 67 is connected by a pivot 72 to the leg rest 8, and the link 70 is also connected by pin 73 to the leg rest 8 above the pin 72. The link 69 is also connected by a hinge 74 to the [free end of the link 62. The

links

62 and 65 are also pivotally connected by a pin 75. The link 70 extends beyond its hinge 71, this extension 76 being connected by hinge 77 to the link 65 between the hinge 68 and the pin 75. With this arrangement, the leg rest forms one side of a quadrilateral of links, at one end of the succession of three linkages of the lazy tong device, and the support 1 completes the opposite end of the lazy tong device, so that if any of the linkages is operated, it will cause an extension or contraction of the lazy tong device to elevate or lower the leg rest 8, as is shown in the other Figs. 1 to 4.

The actuating link 26 is connected to the link 61 by the hinge 63, so that when the back rest 6 moves into its tilted position, it will actuate link 26 to extend the lazy tong arrangement and elevate and advance the leg rest 8 to the position shown in Fig. 6. Each side of the seat is provided with a depending lug 78, and a guiding link 79 is hinged by pin 80 to the lug 78, and also is connected by pin 81 to the link 61 intermediate of the ends of link 61 so that when link 61 is rocked clockwise in Fig. 5 by action of the link 26, it will push endwise to the left the link 79, and thus elevate the forward edge of the seat 5. When the back rest 6 is moved back to its sitting position, shown in Fig. 5, the lazy tong device retracts the leg rest 8 and lowers the forward edge of the seat 5.

Referring next to the embodiment of the invention illustrated in Figs. 7, 8 and 8a, the back rest 6 and seat 5 are rigidly connected together to form a unit and this unit is provided at the bottom of the back rest 6 with a lug 82 which is connected by pivot pin 83 to the upper end of a lever 84 which is pivoted on a pin or rod 85 carried by the support 1. The lower end of the lever 84 is pivotally connected by a pin 86 to one end of an actuating link 87 which operates a lazy tong device in a manner similar to that of Figs. 1 to 6.

In this embodiment the leg rest 8 is normally disposed below the forward edge of the seat 5, and is mounted on a lazy tong device having an arrangement of linkage quadn'laterals which are somewhat different in arrangement from those in Figs. 1 to 6. This lazy tong device includes one pair of

links

88 and 89 which are hinged together by a hinge 90, one end of the link 88 beingconnected by a pin 91 to the support 1.

Links

92 and 93 form another pair of links and are hinged together at 94. One end of link 92 is pivotally connected by pin 95 to the support 1, and the free or other end of link 93 is connected by a pin 96 to the leg rest 8.

Links

97 and 98 form still another pair of links which are hinged together at 99. One end of the link 98 is hinged by pin 1410 to the leg rest 8 below pin 96, and the link 97 is hinged by pin 101 to the free end of link 89. The link 97 is extended beyond its hinge or pin 1411 and the extension 97B is pivotally connected by a pin 102 to the link 93 intermediate of its ends.

The link 93 is provided with an extension 163 which is hinged at 104 to the link 88 intermediate of its ends. This again provides three quadrilateral linkages arranged in tandem with the leg rest 8 at one end and the support 1 at the other end, so that when any one of the links is rocked, it will cause extension or contraction of the lazy tong device and elevation 01' retraction of the leg rest 8. The link 87, which is operated by the back rest and seat unit when the latter is tilted into its tilted position, is connected by a pin 105 to the link 88 between its hinge 104 and its pivot pin 91. Thus, the back rest, when it and the seat are pushed rearwardly, will cause an extension of the lazy tong device at each side of the seat, and an elevation of the leg rest 8 to the Fig. 8 position in front of the seat 5.

The seat 5 is provided part way of its forward and rearward edges with a depending lug 106, one at each side of the seat, and a guiding link 1117 at each side of the seat is hinged by pin 108 to the lug 1G6 and also is hinged by pin 109 to a lug 110 on the support 1. The link 107 is normally approximately upright when the seat and back rest are in chair-sitting positions, but when the seat and back rest are tilted and moved rearwardly into the tilted positions shown in Fig. 8, the link 1117 will rock clockwise on the support 1 from its approximately upright position shown in Fig. 7 to an inclined position shown in Fig. 8, which, with the descent of the lower end of the back rest, as shown in Fig. 8, will give a rearward tilting of the seat 5.

In the embodiment of the invention shown in Figs. 9 and and 10a, the back rest 6 and seat 5 are formed as a rigid unit, as in Figs. 7 and 8, and the bottom of this unit below the back rest is provided with a lug 111 which is pivoted by a pin 112 to one end of an upright lever 113 that is rockably mounted on a pin 114 carried by the support 1. The seat 5, at each side and approximately midway between its front and rear edges is hinged to a link 115 which is similar to the link 107 of Figs. 7 and 8, and which link 115 is pivoted at 116 to a lug 117 on the support 1. The seat 5 and back rest 6 move etween the upright or sitting positions shown in Fig. 9, and the tilted positions shown in Fig. 10, in the same manner as explained for Figs. 7 and 8, and the leg rest 8 is disposed below the front edge of the seat, as in Figs. 1 to 8.

The leg rest 8 is mounted on a modified lazy tong device which includes one pair of links 118 and 119 (Fig. 10a) which are connected together by a hinge 121 and the link 119 is also hinged at 121 to leg rest 8. Another pair of

links

122 and 123 are hinged together by a hinge 124, the link 122 being also hinged at 125 to the support 1. The link 123 is provided with an extension 126 which is hinged at 127 to the link 118 intermediate of its ends.

Links

128 and 129 which are hinged together by hinged 130 form still another pair of links. The link 128 is hinged at 131 to the link 123 at the beginning of the extension 126, and the link 129 is hinged by pin 132 to the leg rest 8. Link 129 is also hinged at 133 to the link 118 between the

hinges

120 and 127.

The link 118 is hinged at 134 to the support 1 which provides another series of three pairs of links at each side of the seat, interconnected to form three quadrilateral linkages connected together in tandem, with the leg rest 8 forming one end of the lazy tong device and R8 the support forming the other end of it. Thus, when this linkage is operated, it will extend the lazy tong device at each side of the seat and elevate the leg rest from the inactive position shown in Fig. 9 into the leg-supporting position shown in Fig. 10.

The actuation of this lazy tong device is obtained by providing an extension of link 122 upwardly beyond its pivot pin by which the link 122 is hinged to the support 1, and the upper end of this extension is connected by a pivot pin to one end of a link 136, the other end of which is connected to a pin 137 which connects the lug on the lower edge of .the seat to the link 115. With this arrangement, when the seat and back rest are moved rearwardly from the Fig. 9 to the Fig. 10 position, the link 115 will rock rearwardly at its upper end and thus pull on the link 136 which is connected to the link 122 of the lazy tong device, and thus the lazy tong device will be operated to elevate the leg rest whenever the seat and back rest are moved rearwardly into their tilting positions. When the seat and back rest are returned to their forward or sitting position shown in Fig. 9, the lazy tong device will retract the leg rest 8.

In all of the figures it will be understood that there is one of these lazy tong arrangements at each side of the seat so as to provide a stable mounting for the leg rest 8, and that suitable stops or means (not shown), may be employed to limit the tilting movements of the seat and back rest.

In each of the examples of the invention, there are three pairs of links in each lazy tong device which are operatively connected by means which includes at least one extension of one of the links. In the example shown in Figs. 1, 2 and 2a, 9 and 10 constitute the first pair of links, links 14 and 15 constitute the second pair of links, and links 19 and 20 the third pair or links. The extension of one or the is the extension 23 of the link 14 of the second pair :of links. In the example shown in Figs. 3, 4 and 4a, links 33 and 34 form the first pair, links 38 and 39 form the second pair, and links 42 and 43 form the third pair. The extension of one or more links refers to the extension 47 of the link 38 of the second pair, and extension 49 of the 42 of the third pair. In the example shown in Figs. 5, 6 and 6a, the

links

65 and 67 form the first pair, links 61 and 62 form the second pair, and links 69 and 70 form the third pair. The extension of at least one of the links of a pair is the extension 76 of the link 79 of the third pair. In the example shown in Figs. 7, 8 and 8a, the

links

92 and 93 form the first pair, the

links

88 and 89 form the second pair, and links 97 and 98 :form the third pair. The extension of at least one link of a pair refers to the extension 97E of link 97 and the extension 1113 of the link 93. In the example shown in Figs. 9, l0 and 10a, the

links

118 and 119 form the first pair,

links

122 and 123 form the second pair, and 128 and 129 dorm the thind pair. The extension of at least one of the links of a pair is the extension 126 of 123 of the second pair.

It will be observed that in each example, one of the links of the first pair is always pivoted to the support and the other link of that pair is always pivoted to the leg rest, also that one of the links of the second pair is always pivoted to the support, and the other link of that pair is always pivoted to one link of the third pair. The other link of the third pair is always pivoted to the leg rest. The extension of at least one of the links of a pair is pivoted to a link of another pair.

It will be understood that various changes in the details and arnangernents of parts which have been herein described and illustrated in order to explain the nature of the invention may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims.

I claim:

1. An adjustable chair comprising a support, a back rest and a seat pivotally mounted on said support to move individually between normal chair positions and tilted positions, a leg rest disposed beneath the forward part of said seat, linkage at each side of said seat and having two pivoted to and depending from said support and arranged in spaced relation to one another in a direction dorvvardly and rearwardly of the seat, another link pivotally connected at one end to the lower end of the r-earmost of said two links, and at its other end to the leg rest, the other of said two links being pivoted directly to said another link intermediate of its ends and being approximately parallel to the rearmost of said two links, a link pivoted to said leg rest at a point thereof above that to which said another link is pivoted and extending rearwardly tfirom the leg rest, a further link pivoted to said another link in front of both pivotal connections of said two links to said another link, upstanding therefrom, and pivoted intermediate of its ends to the rear end of the upper one of said links that is connected to the leg rest, still another link pivotally connected to the upper end of said further link and to the fowand one of said two between the ends of the latter, actuating means operatively connected to said back rest and to one of said two links and operable when the back rest is tilted rearwardly to move forwardly the one of said two links to which it is connected and cause an advance and elevation of said leg rest.

2. The chair according to claim 1, and a bell cnank lever pivoted to said support and having a depending arm and a horizontal arm, a link pivotally connected at one end to the lower end of said depending bell crank arm and at its other end to one of said two links, and a link pivotally connected to said horizontal arm of said bell crank lever and to said seat forwardly of said pivotal mounting of said seat on said support, whereby when said two links are moved iorwardly to advance and elevate said leg rest, one of them will also concurrently rock said bell crank lever .and elevate the forward part of said seat.

3. The chair according to claim 1, and means pivotally carried by said support and operatively connected to said seat and to one of said two links for elevating the forward part of said seat when said two links are moved forwardly to elevate and advance said leg rest.

4, An adjustable chair comprising a support, a back rest and a seat pivoted to said support on adjacent axes enabling individual movements of said back rest and seat from sitting positions to tilted positions, a leg rest disposed beneath the rorwand part of said seat, extensible linkage at each side of said seat supporting said leg rest from said support and having two links depending from and pivoted to said support and having portions spaced from the pivots to said support and connected by other linkage to said leg rest to support it and move it iorwandly and elevate it, or to retract the leg rest, actuating means connecting said back rest to one of said two links for moving the latter forwardly to cause an advance and elevation of the leg rest when the back rest is tilted rearwardly on said support, a bell crank lever pivoted on said support and having a vertically extending arm and a horizontally extending arm, means articulately connecting said vertically extending arm to one of said two links, means \articulately connecting said horizontal arm to said seat at a zone forwardly of the pivotal connection of the seat to said support and rocking, when said two links are moved forwardly to advance and elevate said leg rest, said bell crank in :a direction to elevate the forwand part of said seat.

5. An adjustable chair comprising a support, a back rest and a seat pivotally mounted for individual rocking on said support on adjacent axes at the rear of the seat and the lower end of said back rest, a leg rest disposed beneath the forward part of said seat, three pairs of links at each side of said seat and the links of each pair being pivotally connected to each other, one of said pairs having one link thereof pivoted to said support and. its other link pivoted to said leg rest, a second pair of said links having one link thereof pivoted to said support forwardly of the connection of the one link of said one of the pairs to said support and its other link extending forwardly therefrom, the third pair of said links having one link thereof pivoted to said leg resttabove the connection to the leg rest of the link of the said one pair, and its other link pivoted to the forwardly extending link of said second pair, and also extended downwardly beyond its pivotal connection to the other link of its pair'and the extension pivoted to that link of said one pair which is pivoted to said leg rest, said one link of said second pair being also pivotally connected to said other link of said one pair intermediate of the ends of the latter, and actuating means connecting said back rest to a link oi one of the first two pairs of links and operating said pairs of links to advance and elevate said leg rest when said back rest is tilted rearwardly.

6. The chair according to claim 5, and means connecting a link of one of the first two pairs of links to said seat for raising the forward part of said seat when the leg rest is advanced and elevated upon a rearward tilting of the back rest. i

7. The chair according to claim 5 and a bell crank lever pivoted on said support at a side of the seat and having a generally vertical arm and "a generally horizontal arm, means articulately connecting the horizontal arm of said lever to said seat and said vertical arm to a part of the means by which the leg rest is advanced and elevated upon rearward tilting of the back rest, whereby when the leg rest is advanced and elevated the forward part of said seat will be raised. a

8. An adjustable chair comprising a support,'a back rest and a seat mounted on said support for movements between normal chair positions and tilted positionsa leg rest disposed beneath the forward part of said seat, a leg rest swing control at each side of said seat and having a pair of links pivoted to said support with the links of each pair spaced apart in a forward and rearward direction, and a connecting link pivotally connected to both links of said pair and directly tosaid leg rest, and a leg rest inclination control at each side of said seat and including a lever pivoted to said connecting link and having a link connection to said leg rest and a link connection to one of said pair of links, and an actuating link connecting one of the links of said pair to one of said seat and said back rest for actuation thereby, when said one of said seat and back rest is moved into its said tilted position, to cause an advance and elevation of said leg rest.

9. An adjustable chair having a support, a seat'and back rest on said support, tiltable (from normal sitting positions, a leg rest disposed beneath the forward part of said seat, one link pivoted to said support, another link connecting said one link to said leg rest, an actuating link connecting said one link to one of said seat and said back rest for actuation thereby when said one of said seat and back rest is tilted from its normal sitting position, and linkage connected to said support, said leg rest and twice to said another link for causing an advance and elevation of said leg rest when said seat and back rest are tilted out of normal sitting positions.

10. An adjustable chair comprising a support, a back rest and a seat mounted on said support for movements between normal chair positions and tilted positions, a leg rest disposed beneath the forward part of said seat, a leg rest swing control at each side of said seatand having a pair of links pivoted to said support with the links of each pair spaced apart in a forward and rearward direction, and a connecting link pivotally connected to both links of said pair and at one end directly to said leg rest, and a leg rest inclination control'at each side of said seat and formed of a lever having a linkconnection'to said leg rest, and another link connection to one of the links of said pair and pivotally connected to said connect- 10 References Cited in the file of this patent UNITED STATES PATENTS 2,672,919 Luckhardt Mar. 23, 1954 2,693,845 Hofiman Nov. 9, 1954 2,750,988 Luckhardt June 19, 1956 FOREIGN PATENTS 72,116 Norway May 19, 1947