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US 289653 A
Description (OCR text may contain errors)
T. HAYNES. f LOCK PORRBGLINING CHAIRS.r
No. 289,653.v Patented Deo. 4, 1883.
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UNITED STATES THOMAS HAYNEs,
LOCK FOR RECLINIINIG-Ci-IAIRS.
SPECIFICATION forming part of Letters Patent No. 289,653, dated December 4, 1883.
Application filed August 14, 1883. (No modelt) and useful Improvements in Locks for Beclining-Ghairs; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, forming part of this specification.
My invention has for its object a gravitylock for the adjustable sections of a recliningchair which shall control automatically the adjustments of the back, occupy an economized space, and afford the most convenient means for its releasement in the close arrangement side by side of the chairs; and it consists in certain details of construction and combination of parts, as will be more fully described, and specifically pointed out in the claims.
In the drawings, Figure l is a view of a rcclining-chair and my improved lock applied to the joint of the arm and standard. Fig. 2 is a view of the adjustable arm and of the locking parts located in the joint of said arm.
Fig. 3 is aview of the adjustable standard and construction of the locking parts of the joint. Fig. 4 is a view of a portion of the adjustable arm, showing a modied construction of the lock in the joint. c Fig. 5 is an end view ofthe dog and lever and its engaging parts.
A represents the adjustable arm of a reclining-chair, and B the adjustable standard.
C D represent the opposite contiguous surfaces of the joint of the arni and standard, respectively.
c is a pivot on the surface C of the joint of the arm A.
E is a rim on standard B, extending around the contiguous portion D of the joint, and e the ratchet-teeth on the inner portion of the same.
F represents the dog, having the curved -portion o and the ratchet-teethf.
i is a pivot in the portion C of the joint of arm A upon-which dog F moves.
G is a link, which is attached to the dog F 5o and the arm h of the lever H bythe pivots g k.
H is a lever on pivot e, operating the dog F, and which .extends through the opening b in the rim E on standard B.
h is an arm depending from lever H.
Z is a perforation in pivot cto receive screw bolt m.
m is a Screw-bolt.
n is a perforation through the center of the joint of the standard B.
In the construction of my invention, and in casting the arm A of the chair, I form upon the contiguous portion C of the joint of said arm, which has a smooth surface, a pivot, c, in the center, and a pivot, z', between the said pivot c and the extremity of the joint. rIhe standard B is then formed with a rim, E, ex tending at right angles from the contiguous surface D around the edge of the joint of a sufficient width to inclose the lock, and as far circumferentially as to provide for an opening, b, for the extension of the lever H and its free operation. Upon the interior surface of rim E, and approximating in extent to the width of the standard B, I form a series of ratchet-toothed depressions, e. The lever H 75 is then formed with a suitable perforation at one end to exactly t over the pivot c on the surface C of the joint, and extend from said pivot in a horizontal plane as far back along the arm A of the chair as will readily permit its operation by the hand. Upon this lever H a short arm, h, is cast, depending from said lever near the pivot c.
The dog F is constructed with a curved portion or back, o, to give space for its action, and a number of ratchet-teeth, f, in its mova ble-end, and is made of sufficient length to extend from the pivot z', upon which it moves, and engage with the ratchet-teeth e in the rim E of standard B. The link Gis halved at each end, as shown at s in Fig. 5, and a depression, fr, is made in the dog- F to receive the end of the link through which the pivot 7c is passed. The arm h of lever H is also halved in a similar manner to that of the link' G, and the pivot g secures the two parts together.
In uniting the various portions of the lock, the lever and dog, with the link attached, are placed in position on the pivots 0 and i, in the joint of arm A. The lever H is then raised a slight distance, which lifts the dog F and the standard B, attached to the arm A, the
rim E upon standard B passing over and inclosing the locking parts upon arm A, and upon releasing the lever H, which falls by its own Weight, the ratchet-teethf upon the end of the dog F fall in the ratchet-toothed depressions e upon the inner side of rim E. The position of the dog F to the ratchet-teeth e in rim E is relatively at an acute angle to a line drawn through pivot c, upon which lever I I moves, and the equidistant point from which the ratchet-teeth eXtendon said rim, thus affording a strong bearing to meet the strain which occurs in the dcclension of the back of the chair.
In place of link G, the arm 71J ofthe lever may be eitended with a sufficient curve to afford a proper center at which the purchase is applied and attached directly to the dog. The opposite portions O D of the joint of the arm and standard having been brought together7 a bolt, m, provided with a screw-thread, is passed through the perforation n of the standard I3 and into the threaded perforation Z of the pivot c, securing the two parts together. The pivot c may be formed at a convenient length to be riveted outside of the standard, or a bolt may be introduced through the pivot c aud passed through each portion of the joint and riveted upon opposite sides, as preferred.
In the operation of the lock and in raising the back ofthe chair from a reclined position, the dog will automatically rise and fall, retaining the back at any7 desired angle. By elevating theA lever the dog is thrown from engagement with the ratchet upon the rim ofthe standard, and a full reclining position of the back is obtained.
My invention obviatcs the discomfort o f arising from the chair or inclining the body in making the adjustments of the back, and can 4o be applied to the chair at a minimum cost.
Having fully described my invention, what I now claim as new, and desire to secure by Letters Patent, .is-
l. In combination with a movable joint in a 4 5 reclining-chair, a locking device consisting 0f a dog pivoted between the contiguous surfaces of said joint and provided with a ratchettoothed end, and a lever pivoted to said dog and in said joint, and a series of vengaging pro- 5o jections upon the opposite contiguous surface of the joint, as shown and described.
2. In combination with a movable joint in a reclining-chair a locking device consisting `of a dog pivoted between the contiguous surfaces 5 5 ofsaid joint and provided with a ratchettoothed end, and a lever or its equivalent attached to a pivot in said joint and provided with a depending arm, and a link attached to said arm and to the dog, and a series of engag- 6o ing projections upon the opposite contiguous surface of the joint, substantially as shown and described.
3. Areclining-chair having a movable back hinged to the scat and movable supports piv- 6 5 oted to said seat and back and to each other, the opposite contiguous surface of one of said parts of the movable joint provided with a rim extending around said joint, and having a series of engaging projections upon the inner 7o surface of said rim, as and for the purpose specied.
. THOMAS HAYNES. itnesses J. Jnwn'rr, H. FAIRCHILD.