US244733A - Irving v - Google Patents

Description

(Model.)

` I. V. BLISS 8v H. PARRY.'

TILTING CHAIR. l No. 244,733'. Patented Ju1y'26, 1'881.

ATTORNEY isn m5.' "wie UITED 'STATES PATENT OFFICE.

IRVING V. BLISS AND HENRY PARRY, OF MILWAUKEE, WISCONSIN, ASSIGN- ORS, BY DIRECT AND MESNE ASSIGNMENTS, TO THE MILWAUKEE CHAIR COMPANY, OF SAME PLACE.

TIL. TING CHAIR.

SPECIFICATION forming part of Letters Patent No. 244,733, dated July 26, 1881.

' Application led May 24,1880. (Model.)

To all whom it may concern Be it known that we, IRvINe V. BLrss and HENRY PARRY, citizens of the United States, residing at the city of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Tilting Chairs 5 and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable 1o others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part of this specification.

Our invention relates to improvementsv in tilting chairs.

The object of our improvements is, first, to reduce the points of oscillation of the seat, that it may be more easily rocked; second, torewhich it is raisedand lowered.

D is a supporting-bracket, the arms of which are rigidly secured to the respective sides of the seat-frame at vE E and rock with the seat. The lower side of the bracket D is provided with lugs F F, which are respectively provided with V-shaped slots G. The apices ofthe slots G form the points of oscillation of the seat.

His a bracket or spider,whichis constructed in one piece with the screw C, or is rigidly -se cured to it. The spider H is provided with openings I I for the reception of Iugs- F. The front walls of the slots I I form an acute angle,

conforming in shape to the V-shaped slot G, in

which they rest, and upon the point of which 5o angle the seat oscillates as it is tilted.

move the points of oscillation asfar from the Y l is a screw upon which the seat turns, and by J is a tension-spring.

K is a supporting-arm, the upper end ot' which rests beneath and against the front of the seat-frame and prevents it from tilting downward, its rear end being attached rigidly to the spider H or cast in with.

L is an adjustable hook. Its rear end is sockthe same piece thereeted upon the stationary arm M of the spider.

The front end projects slightly in front of the 6o bracket D, and is connected with the rear end ot' the tension-sprin g J. The front end of the tension-spring is attached to the arm K. Thus,

as the chair is inclined backward, it oscillates upon the points indicated within the slots G, 6 5 and the spring is extended, when by the contracting tendency of the spring the seat is drawn forward, whereby an easy rocking motion is produced.

O is an adjusting-screw, which operates 7ov through a projecting lug, P, of the bracket against the hook L, the office of which is to adjust the hook higher or lower. When the hook is raised the leverage of the chair upon the spring isldiininished and the springwill v support a greater weight. When the hook is lowered the lever-purchase of the chair upon the spring is increased and the capacity of the spring to support agiven weight is diminished. Thus the same spring is equally adapted to a 8o light or heavy person.

Having thus described our invention, what we claim as new, and desire to secure by Let ters Patent, is-

l. The improvements in tilting chairs here- 8 5 in described, consisting in the combination of spider H,'provided with openings I I, the front edges of which are angular, with the bracket D, provided with lugs F F, the lugs F F being respectively provided with V-shaped recess G, 9o substantially as and for the purpose speciiied.

2. The combination of bracket D, lugs F F, havin g V-shaped recesses G, chair-frame B, and spider H, having openings I I, the front edges of which openings are made angular, for the reception of lugs F F, substantially as set forth. f

3. The combination of hooks L, having a pointed end adapted to enter the socket or recess in arm M, rigid iniiexible arm M, said arm roo being constructed in a single piece with the J, and arm K,a11 substantially as and for the zo bracket D, spring J, and arm K,substanta11y purpose specified. as set forth. In testimony whereof We affix our signatures 4. The combination of bracket D, proided in presence of two witnesses. l 5 with screw-lug,` P, lugs F F, supporting-arms IRVING V. BLISS.

Dl D', said sugporting-arms being rigidly sc- HENRY PARRY.

cured to and adapted to oscillate with the seat, Witnesses:

hook L, pivoted or attached to the rear end of JAMES B. ERWIN, the inexible arm M, adjusting-screw O, spring,` W. J. SINNOTT.

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