US3043621A

US3043621A - Reclining chair of the multiple movement type

Info

Publication number: US3043621A
Application number: US23963A
Authority: US
Inventors: Peter S Fletcher
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-04-22
Filing date: 1960-04-22
Publication date: 1962-07-10
Anticipated expiration: 1979-07-10

Description

July 10, 1962 s. FLETCHER 3,043,621

RECLINING CHAIR OF THE MULTIPLE MOVEMENT TYPE Filed April 22, 1960 2 Sheets-Sheet 1 INVENTOR. P675? 5. ago/a? BY Liz/wk J

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10, 196 P. s. FLETCHER 3,043,621

RECLINING CHAIR OF THE MULTIPLEMOVEMENT TYPE Filed April 22; 1960 2 Sheets-Sheet 2 I --/zz /24 f\ ma /76/84 [72 /2a 7 L34 /60 97 206 ,220, M0 F/G. 4

U a N F b? 52 /48 A21 J INVENTOR. PETE? 5. FLETCl/ER United States Patent 3,043,621 RECLINING CHAIR OF THE MULTIPLE MOVEMENT TYPE Peter S. Fletcher, Delray Beach, Fla., assignor to Anton Lorenz, Boynton Beach, Fla.

Filed Apr. 22, 1960, Ser. No. 23,963

7 Claims. (Cl. 297-85) The present invention relates generally to reclining chairs, and in particular to an improved reclining chair of the type including body-supporting means having a movable back-rest and a movable seat which are coordinated with each other to include two distinct phases of chair movement.

The well known reclining chair comprises a support, body-supporting means including a back-rest and seat movably mounted on the support and a leg-rest mounted beneath the seat and movable into various elevated legsupporting positions in response to chair movement. Heretofore there have been two distinct types of reclining chair; those constructed with a unitary back-rest and seat mounted on a support for movement intovarious tilted positions, and those constructed with a movable back-rest and movable seat and mounted on the support for reclining and inclining movement respectively. Chairs of the type incorporating a unitary back-rest and seat were found to be most suitable for accommodating the chair occupant in a tilted back position, but in a sitting attitude, with the occupants legs supported on the elevated leg-rest. Chairs of the type incorporating a movable back-rest and movable seat were found to be most suitable for accommodating the chair occupant in a complete and full relaxation position, with the occupants legs supported on the leg-rest, in that the angle between the back-rest and seat increases in response to the reclining movement of the chair.

Of recent times there has been introduced an improved reclining chair which exhibits attributes of both types of chairs which have been heretofore sold, to wit, those suitable for accommodating the chair occupant in a semireclined or tilted back attitude and those suitable for accommodating the chair occupant in a fully reclined or complete relaxation attitude. Provision i made in such chairs of the double movement type for a first movement phase from a sitting position to an intermediate tilted position during which there is substantially noangular displacement between the back-rest and seat, with the leg-rest moving to an elevated leg-supporting position to establish an intermediate tilted position, and for a second movement phase from the intermediate tilted position to a fully reclined position during which the angle between the seat and back-rest opens up, with the leg-rest remaining in an elevated leg-supporting position to establish a complete relaxation or fully reclined position for the chair occupant.

Broadly, it is an object of the present invention to provide an improved reclining chair of the double movement type. Specifically, it is within the contemplation of the present invention to provide improved and simplified coordinating mechanisms for establishing two distinct phases of movement in a reclining chair.

In accordance with an illustrative embodiment demonstrating objects and features of the present invention,

there is provided a reclining chair which comprises a support, body-supporting means including a seat and a "ice '2 back-rest having a pivotal connection therebetween, a second movement link, means pivotally mounting said second movement link on said support, a mounting link, and means pivotally and movably mounting said mounting link on said second movement link. A holding link is pivotally mounted on' said mounting link and pivotally connected to said body-supporting means. Front guiding means are pivotally mounted on said mounting link and pivotally connected to said seat, and rear guiding means are pivotally mounted on said support and pivotally connected to said back-rest. The front and rear guiding means guide said body-supporting means during said first movement phase, with the holding link maintaining a substantial rigid relationship between said seat and back-rest and with said second movement link remaining stationary. The second movement link moves relative to said support and said back-rest turns about its pivotal connection to said rear guiding means during said second movement phase to progressively increase the angularly relationship between said seat and backrest. The chair further includes :a leg-rest and a legrest linkage which mounts the leg-rest for movement to an elevated leg-supporting position during said first movement phase. The mounting link remains stationary during the first movement phase and effectively is rigid with said support. The mounting link moves during the second movement phase and effectively is rigid with said seat. An actuating means is provided for the leg-rest which is operatively connected between the mounting link and the seat and is responsive to the relative movement therebetween in the first movement phase to move the leg-rest to the elevated leg-supporting position. 'The effective rigid relationship between the mounting link and the seat during the second movement phase maintains the legrest in an elevated leg-supporting position and in a substantially rigid relationship to the seat during such second movement phase.

The above brief description as well as further objects, features and advantages of the present invention will be more fully appreciated by reference to the following detailed description of several illustrative embodiments according to the present invention, when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a side elevational view, with parts broken away and sectioned, showing a reclining chair of the double movement type embodying features of the present inrelaxation position for the'chair occupant, with the legrest being disposed'in an elevated leg-supporting position;

FIG. 4 is ,a side elevational view, with parts broken away and sectioned, showing a reclining chair of the double movement type embodying features of the present invention, with the chair shown in the upright or sitting position;

FIG. 5 is a side elevational view similar to FIG. 1 but showing the reclining chair in an intermediate tilted or semi-reclined position, with the leg-rest moved to an elevated leg-supporting position; and,

FIG. 6 is a side elevational View, similar to FIG. 2, but showing the reclining chair in a fully reclined posi tion wherein the back-rest and seat have been angularly displaced relative to each other to establish a complete relaxation position for the chair occupant, with the legrest being disposed in an elevated leg-supporting position.

Referring now specifically to FIGS. 1 to 3 of the drawings, there is shown a first embodiment of reclining chair demonstrating features of the present invention, generally designated by the reference numeral 10, which includes a support or frame 12 having opposite side walls 14 interconnected by suitable cross braces 16 and supported on depending legs 18.

Body-supporting means 20 including a back-rest 22 and a seat 24 are mounted on the support 12 for reclining and inclining movement respectively for a first movement phase from a sitting position illustrated in FIG. 1 to an intermediate tilted position illustrated in'FIG. 2 and for a second movement phase from the intermediate tilted position illustrated in FIG. 2 through a series of reclining positions to a fully reclined position illustrated in FIG. 3.

Disposed beneath the forward end of the seat 24 is a leg-rest 26 which is mounted for movement from a stored retracted position illustrated in FIG. 1 to elevated legsupporting positions illustrated in FIGS. 2 and 3. As will be described, the leg-rest 26 is coordinated to the body-supporting means 20 for movement into an elevated leg-supporting position in response to the movement of the body-supporting means through the first movement phase and into the intermediate tilted position of FIG. 2, with the leg-rest remaining substantially in the elevated leg-supporting'position as the chair moves to the various reclining positions and into the fully reclined position of FIG. 3.

A linkage mechanism or chair hardware is provided at each side of the chair and includes a mounting bracket or fixture 22a, fixed to the back-rest, a further mounting bracket or fixture 24a fixed to the seat, and a still further mounting bracket or fixture 26a fixed to the leg-rest. The

mounting bracket 2411 includes a rearwardly directed rigid hanger arm which is connected to the back-rest 22 and-its bracket 22a at a seat pivot 30. A first movement linkage is provided which includes as movable links thereof, a front guiding link 32 having a pivotal connecatively' stationary links are provided intermediate the respective pivotal mounts of the front, intermediate, and rear guiding

links

32, 36, 38 respectively. Specifically,

there is provided a mounting link 42 which extends lengthwise of the chair frame and rests against the cross braces 16 serving as a stop throughout the first movement phase, as may be appreciated by progressively inspecting FIGS. 1 and 2. The front guiding link 32 which constitutes the upwardly projecting arm of a double-arm lever has a pivotal mount '44 intermediate its ends on the mounting link 42 at a point spaced rearwardly from the forward end thereof. The holding link 36 has a pivotal mount 46 at its lower end on the rearward end of the mounting link 42, while the rear guiding link has a pivotal mount 48 directly on the support 12. The mounting link 42 is pivotally and movably mounted on the support by a second movement link 50 which has a pivotal mount 52 at its rearward end on the support and a pivotal connection 54 at its forward end to the mounting link 42 intermediate the

pivotal connections

44, 46.

The leg-rest 26 is mounted for movement from the retracted position of FIG. 1 to the elevated leg-supporting positions illustrated in FIGS. 2 and 3 by a leg-rest mounting linkage, generally designated by the reference numeral 75,), which includes a first pair of links '72, 74 having a pivotal interconnection '76 at their adjacent ends, a second pair of links 78, 83* having a pivotal connection 82 at their adjacent ends, and a third pair of links 84, 56 having a pivotal connection 558 at their adjacent ends. The link 72 is seen to be a depending extension rigid with the front guiding link 32, with the

links

32, 72 constituting the double-arm lever having the pivotal mount 44. The link 74 of the first link pair crosses over the link '78 of the second link pair and has a pivotal connection 90 thereto. The forward end of the link 74 of the first link pair has a pivotal connection 92 to the link 84 of the third link pair. The link 84 in turn crosses over the link 8%) of the second link pair and has a pivotal connection 94 thereto at the cross over point, with the link 36 of the third link pair having a pivotal connection 96 at its forward end to the lower end of the leg-rest. The link 78 of the second link pair has a pivotal connection 9%) at its upper end to the forward end of the mounting link 42, while the link of the second link pair has a pivotal connection 1% at its forward end to the upper end of the leg-rest 26. The leg-rest mounting linkage '70 will be recognized as being of the lazy-tong type wherein a turning movement of the link 72 in a direction to move the pivotal connection 76 toward the pivotal connection 98 is effective to extend such lazy tong linkage to move the leg-rest 26 to the extended and elevated leg-supporting position shown in FIGS. 2 and 3. Specifically, during the first movement phase the front guiding link 32 which turns in the clockwise direction about the relatively stationary pivotal mount 44 in response to the rearward movement of the seat 24 serves as a driver to the leg-rest mounting linkage which brings about a corresponding clockwise turning movement of the link 72 aboutthe relatively stationary pivotal mount 44.

Provision is. made for blocking the leg-rest mounting linkage 7t} and for establishing a substantially rigid relationship between the leg-rest 26 and the seat 24 at the end of the first movement phase (see FIG. 2). This rigid relationship is maintained through the second movement phase, with the seat 24 and leg-rest 26 being elevated as a unit. Specifically, a stop 152 is fixed to the under surface of the link 42 in advance of the pivotal mount or connection 44, which stop

first link pair

72, 74 in the requisite intermediate position for the chair and thereafter renders the leg-rest mounting linkage 70, the leg-rest 26 and theseat 24 rigid with each other. Further, a stop 164 is arranged to abut the rear guiding link 38 at the end of the first movement phase (see FIG. 2) and a stop 1&6 is arranged to abut the second movement link St at the end of the second movement phase (see FIG. 3).

For better understanding in this illustrative embodiment of the present invention, reference will now be made to a typical sequence of operations:

When the chair occupant is seated in the chair It) and leans against the back-rest 22, the body-supporting means 2a is displaced rearwardly and downwardly relative to the support, with substantially no angular displacement between the back-rest 22 and the seat 24. During such first movement phase, the chair linkage which includes the three

movable links

32 and 38 guide the body supporting means with link 36 maintaining the desired relationship between the back-rest 22 and the seat 24, with substantially no angular change therebetween or with a slight opening of the angle therebetween if such is desirable. Incident to such rearward movement of the body-supporting means 2%, a turning movement is imparted to the double-

arm lever

32, 72 which moves the leg-rest 26 to the elevated leg-supporting position shown abuts the link 72 of the in FIG. 2. The end of the first movement phase is established when the link 72 abuts the stop 162 and at such time the leg-rest linkage 70 and the

links

32, 36 become substantially unitary with the mounting link 42 and the rear guiding link 38 becomes substantially unitary or fixed in relation to the support. During the second movement phase, the second movement link 54) turns in the clockwise direction about its pivotal mount 52 to bring about a lifting of the seat 24 and the leg-rest 26 in the desired relationship. Simultaneously, the backrest 22 turns about the pivotal connection 41} to the rear guiding link 38 serving as a relatively stationary mount throughout the second movement phase. As may be appreciated by progressively inspecting FIGS. 2 and 3, the turning movement of the second movement link generally guides the seat 24 and the leg-rest 26 in an upward direction, while the back-rest simultaneously turns rearwardly about its pivotal connection 49 serving as a relatively stationary pivotal mount to open up the included angle between the back-rest and seat and to thereby establish a number of intermediate reclining positions and the fully reclined position of FIG. 3.

in this illustrative embodiment, the end of the second movement phase is established when the back-rest abuts the rear cross brace of the chair frame 12 serving as a stop.

When the chair occupant desires to restore the chair to the upright or sitting position illustrated in PEG. 1, the occupant leans forwardly such that the back-rest, seat and leg-rest move through the reverse sequence, with the chair first moving into the intermediate tilted position of FIG. 2 and then returning to the upright or sitting position illustrated in FIG. 1.

Referring now specifically to FIGS. 4 to 6 of the drawings, there is shown a further embodiment of reclining chair demonstrating features of the present invention, generally designated by the reference numeral 111 which includes a support or frame 112 having opposite side walls 114 interconnected by suitable cross braces 116 and supported on depending legs 11%.

Body-supporting means 120 including a back-rest 122 and a seat 124 are mounted on the support 112 for reclining and including movement respectively for a first movement phase from a sitting position illustrated in FIG. 4

to an intermediate tilted position illustrated in FIG. 5 and for a second movement phase from the intermediate tilted position illustrated in FIG. 5 through a series of reclining positions to a fully reclined position illustrated in FIG. 6.

Disposed beneath the forward end of the seat 124 is a leg-rest 126 which is mounted for movement from a *stored retracted position illustrated in FIG. 4 to elevated leg-supporting positions illustrated in FIGS. 5 and 6. As will be described, the leg-rest 126 is coordinated to the body-supporting means 120 for movement into an elevated leg-supporting position in response to the movement of the body-supporting means through the first movement phase and into the intermediate tilted position of FIG. 5, with the leg-rest remaining substantially in the elevated leg-supporting position as the chair moves to the various reclining positions and into the fully reclined position of FIG. 6.

A linkage mechanism or chair hardware is provided at each side of the chair and includes a mounting bracket or fixture 122a, fixed to the back-rest, a further mounting bracket or fixture 124a fixed to the seat, and a still further mounting bracket or fixture 126a fixed to the leg-rest. The mounting bracket 124a includes a rearwardly directed rigid hanger arm which is connected to the back-rest 122 and its bracket 122a at a seat pivot 130. A first movement linkage is provided which includes as movable links thereof a front guiding link 132 having a pivotal connection 134 to the seat 124 at the forward end of the bracket 124a, the portion of the seat 124 intermediate the

pivotal connections

134, 130, a rear guiding link 138 having a pivotal connection 140 to the back-rest at a point spaced rearwardly of the pivotal connection 130, and the portion of the back-rest intermediate the

pivotal connections

136, 140. Relatively stationary links are provided intermediate the respective pivotal mounts of the front, and rear guiding links 132, 138 respectively. Specifically, there is provided a mounting plate 142 which rests against a stop 143 throughout the first movement phase, as may be appreciated by progressively inspecting FIGS. 4 and 5. The front guiding link 132 has a pivotal mount 144 intermediate its ends on the mounting plate 142 adjacent the forward end thereof. The holding link 136 has a pivotal mount 146 adjacent its lower end on the mounting plate 142, while the rear guiding link 138 has a pivotal mount 148 directly on the support 112. Further, the holding link 136 has a pivotal connection 149 to the seat 124 intermediate the

pivotal connections

134, 130. The mounting plate 142 is pivotally and movably mounted on the support by a second movement link 150 which has a pivotal mount 152 at its rearward end on the support 112 and a pivotal connection 154 at its forward end to the mounting plate 142.

In this illustrative embodiment, provision is made for locking the second movement linkage against movement at the start of the first movement phase such as to assure that the first and second movement linkages will operate in the order named. Specifically, the second movement linkage includes a further second movement holding link 156 which has a pivotal mount 158 at its rearward end on the support 112 and a pivotal connection adjacent its forward end to the mounting plate 142 coaxially with the pivotal connection 146 of the holding link 136 to the mounting plate 142. The holding link 136 includes a depending integral extension 136a which is provided with a seating notch 13611 which engages a pin 160 fixed to the mounting plate 142 when the holding link is in the position corresponding to the sitting position of the chair. It will be'appreciated that the pin 160 engaged within the notch 136b in the link extension 136a effectively locks the further second movement link 156 against turning movement about its pivotal mount 158. During the early portion of the first movement phase, the holding link 136 turns in the clockwise direction about the pivotal mount or connection 146 which moves the locking notch 1361; out of engagement with the pin 160, with the locking arrangement being completely unlocked in the intermediate tilted position of FIG. 5 such that there can be relative movement between the second movement holding link 156 and the mounting plate 142 during the second movement phase.

The leg-rest 126 is mounted for movement from the retracted position of FIG. 4 to the elevated leg-supporting positions illustrated in FIGS. 5 and 6 by a leg-rest mounting linkage, generally designated by the reference numeral 170, which includes a first pair of

link

172, 174 having a pivotal interconnection 176 at their adjacent ends, a second pair of

links

178, 180 having a pivotal connection 182 at their adjacent ends, and a third pair of

links

184, 186 having a pivotal connection 138 at their adjacent ends. The link 172 of the first link pair has a pivotal mount 197 at its upper end on the forward end of the bracket 124a. The link 174 crosses over the link 178 and has a pivotal connection 191 thereto. The forward end of the link 174 of the first link pair has a pivotal connection 192 to the link 184 of the third link pair. The link 184 in turn crosses over the link 1861 of the second link pair and has a pivotal connection 194 thereto at the cross over point. The link 186 of the third link pair has a pivotal connection 196 at its forward end to the lower end of the leg-rest. The link 178 of the second link pair has a pivotal connection 123 at its upper end to the forward end of the bracket 124a, while the link 180 of the second link pair has a pivotal connection 200 at its forward end to the upper ends of the leg-rest 126. The link 172 of the first link pair is constrained by an actuat- 'ing link 202 which has a pivotal mount 204 at its rearward end on the mounting plate 142 and a pivotal connection 2% at its forward end to the link 172. The legrest mounting linkage 17% will be recognized as being of the lazy-tong type wherein a turning movement of the link 172 in a direction to move the pivotal connection 176 toward the pivotal connection 198 is eflective to extend such lazy-tong linkage and to move the leg-rest 126 to the extended and elevated leg-supporting positions shown in FIGS. 5 and 6. Specifically, during the first movement phase the rearward movement of the seat 124 actuates the leg-rest mounting linkage, with clockwise turning movement of the link 172 about the pivotal mount 197.

Provision is made for blocking the first movement linkage and for establishing a substantially rigid relationship between the leg-rest 126 and the seat 124 at the end or" the first movement phase (see FIG. 5) which rigid relationship is maintainedthroughout the second a movement phase, with the seat 124 and the leg-rest 126 being elevated as a unit. Specifically, a stop 208 is fiXed to the link 186 in advance of the pivotal connection 196 which stop abuts the bracket 126a for the leg-rest 126 in the requisite intermediate position for the chair and thereafter renders the leg-rest mounting linkage 170, the leg-rest 126 and the seat 124 rigid with each other.

In that the operation of this embodiment is substantially identical to that of the embodiment illustrated in FIGS. 1 to 3, except for the sequencing means previously described, further description is dispensed with in the interests of brevity.

A latitude of modification, change and substitution is intended in the foregoing disclosure, and in some instances some features of the invention will be employed without a corresponding use of other features; Accordingly it is appropriate that the appended claims be construed broadly and in a'manner consistent with the spirit and scope of the invention herein.

What I claim is:

1. A reclining chair comprising a support, body-supporting means including a seat and a back-rest having a pivotal connection therebetween, a second movement link, means pivotally mounting said second movement link on said support, a mounting link, means pivotally and movablyvmounting said mounting link on said second movement link, a holding link, means pivotally mounting said holding link on said mounting link, means pivotally connecting said holding link to said body-supporting means, front guiding means pivotally mounted on said mounting link and pivotally connected to said .seat, rear guiding means pivotally mounted on said support and pivotally connected to said back-rest, said front and rear guiding means and said holding link moving during a first movement phase and maintaining a substantial rigid relationship between said seat and back-rest with said second movement link remaining stationary, said second movement link moving relative to said support and said back-rest turning about its pivotal connection to said rear guiding means during a second move- V ment phase to progressively increase the angular relationship between said seat and back-rest, a leg-rest, and a leg-rest linkage mounting said leg-rest for movement to an elevated leg-supporting position during said first ,movement phase, said mounting link remaining stationary during said first movement phase and effectively being rigid with said support, said mounting link moving during said second movement phase and effectively being rigid with said seat, and actuating means for said legrest operatively connected between said mounting link and said seat and responsive to the relative movement there/between in said first movement phase to move said leg-rest to said elevated leg-supporting position, the effective rigid relationship between said mounting link and said seat during said second movement phase maintaining said leg-rest in an elevated leg-supporting position and in a substantially rigid relationship to said seat.

2. A reclining chair comprising a support, body-supporting means including a seat and a back-rest having a pivotal connection therebetween, a second movement link, means pivotally mounting said second movement link on said support, a mounting link, means pivotally and movably mounting said mounting link on said second movement link, a holding link, means pivotally mounting said holding link on said mounting link, means pivotally connecting said holding link to said body-supporting means, front guiding means pivotally mounted on said mounting link and pivotally connected to said seat, rear guiding means pivotally mounted on said support and pivotally connected to said back-rest, said front and rear guidingmeans and said holding link moving during a first movement phase and maintaining a substantial rigid relationship between said seat and backrest with said second movement link remaining stationary, said second movement link moving relative to said support and said back-rest turning about its pivotal connection to said rear guiding means during a second movement phase to progressively increase the angular relationship between said seat and back-rest, a leg-rest, and a leg-rest linkage mounting said leg-rest on said mounting link for movement to an elevated leg-supporting position during said first movement phase, said mounting link remaining stationary during said first movement phase and effectively being rigid with said support, said mounting link moving during said second movement phase and effectively being rigid with said seat, and actuating means for said leg-rest operatively connected between said mounting link and said seat and responsive to the relative movement therebetween in said first movement phase to move said leg-rest to said elevated legsuppo-rting position, the effective rigid relationship between said mounting link and said seat during said second movement phase maintaining said leg-rest in an elevated leg-supporting position and in a substantially rigid relationship to said seat. 7

3. A reclining chair according to claim 2 wherein said leg-rest linkage has spaced pivotal mounts on said mounting link.

4. A reclining chair according to claim 2 wherein said actuating means includes a rigid extension of one link of said leg-rest linkage having a pivotal connection to said seat.

5. A reclining chair comprising a support, body-sup porting means including a seat and a back-rest having a pivotal connection therebetween, a second movement link, means pivotally mounting said second movement link on said support, a mounting link, means pivotally and movably mounting said mounting link on said second movement link, a holding link, means pivotally mounting said holding link on said mounting link, means pivotally conmeeting said holding link to said body-supporting means,

front guiding means pivotally mounted on said mounting link and pivotally connected to said seat, rear guiding means pivotally mounted onsaid support and pivotally connected to said back-rest, said front and rear guiding means and said holding link moving during a first movement phase and maintaining a substantial rigid relationship between said seat and back-rest with said second movement link remaining stationary, said second movement link moving relative to said support and said backrest turning about its pivotal connection to saidrear guiding means during a second movement phase to progressively increase the wgular relationship between said seat and back-rest, a leg-rest, and a leg-rest linkage mounting said leg-rest on said seat for movement to an elevated leg-supporting position during said first movement phase, said mounting link remaining stationary during said first movement phase and eilectively being rigid with said support, said mounting link moving during said second movement phase and effectively being rigid with said seat,

and actuating means for said leg-rest operatively connected between said mounting link and said seal; and responsive to the relative movement therebetween in said first movement phase to move said leg-rest to said elevated leg-supporting position, the effective rigid relationship between said mounting link and said seat during said second movement phase maintaining said leg-rest in an elevated leg-supporting position and in a substantially rigid relationship to said seat.

6. A reclining chair according to claim 5 wherein said leg-rest linkage has spaced pivotal mounts on said seat.

7. A reclining chair according to claim 5 wherein said actuating means, includes an actuating link pivotally mounted on said mounting link and pivotally connected to said leg-rest linkage.

References Cited in the file of this patent UNITED STATES PATENTS UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3 ,043 ,621 July 10 1962 Peter S. Fletcher It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

In the drawings h pin "160" in Figures 4 5 and 6 should be cross hatched to show that it is in section. The pin should also be in the same position with reference to the

pivots

152 and 158 in FIG. 6, as it is in Figures 4 and 5. Column 6, lines 35 and 36, and line 49, "mounting plate 142" should read support 112 Signed and sealed this 30th day of September 1969.

(SEAL) Attest:

Edward M. Fletcher, Jr.

Attesting Officer Commissioner of Patents WILLIAM E. SCHUYLER, JR.