US1173075A

US1173075A - Adjustable chair.

Info

Publication number: US1173075A
Application number: US86460214A
Authority: US
Inventors: Elweard T Williamson
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-10-02
Filing date: 1914-10-02
Publication date: 1916-02-22
Anticipated expiration: 1933-02-22

Description

E. T. WILLIAMSON.

ADJUSTABLE CHAIR.

APPLICATION FILED OCT-2,1914.

' 1,173,075. Patented Feb. 22, 1916.

2 SHEETS-SHEET I.

Whine 50% E. T. WILLIAMSON.

ADJUSTABLE CHAIR.

' APPLICATION FILED 0CT.2.1914.

1,173,075. Patented Feb. 22, 1916.

2 SHEETS-SHEET 2.

gnvem Lo;

ELWEARD '1. WILLIAMSON, OF PITTSBURG, KANSAS.

ADJUSTABLE CHAIR.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed October 2, 1914. Serial N 0. 864,602.

To all whom it may concern Be it known that I, ELWEARD T. VVILLIAM- soN, a citizen of the United States, residing at Pittsburg, in the county of Crawford and State of Kansas, have invented certain new and useful Improvements in Adjustable Chairs; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to, adjustable chairs, and one of the principal objects of the invention is to provide reliable and efficient means for adjusting the back relatively to the seat at various inclinations and for holding the back when adjusted, said means being operative by a press button at one arm of the chair.

Another object of the invention is to pro vide means for adjusting the inclination of the back of a chair comprising a spring actuated bolt which holds the back in adjusted position, and a push button and rod which operates the bolt to withdraw the same and to permit the back to be adjusted at the desired inclination when the bolt is again engaged to hold the chair in said adjusted position.

The foregoing and other objects may be attained by means of the construction illustrated in the accompanying drawings, in which,

Figure 1 is a vertical section through the seat portion of the chair and showing the mechanism for holding the back in an adjusted position, Fig. 2 is a plan view of the same, Fig. 3 is a vertical section through one arm of the chair, and showing the mechanism for operating the spring bolt for holding the back in adjusted position, Fig. 4: is a detail view showing the connection of the sliding bars to back of the chair, and Fig. 5 is a perspective view of the guide frame for the sliding bar.

Referring to the drawings, the numeral 1 designates the front legs of the chair and 2 are the back legs thereof, while 3 is the right arm of the chair and 4 is the left arm thereof, supported upon the upper ends of the

legs

1 and 2. The seat frame consists of four bars forming a rectangular frame comprising the side bars 5 and the front bar 6 and the back bar 7. Connected to the inner side near the bottom of the seat frame is a guide frame for the sliding bar, said guide frame comprising a piece of metal bar bent upon ltself to form the rectangular portion 8 whlch 1s secured by a bolt 9 to the front bar 6 of the seat frame and said guide frame comprising the parallel members 10 and the outwardly spaced arms 11, said members 11 having outwardly turned feet 12 bolted to the back members 7 of the seat frame.

The back 13 of the chair is hinged at 15 and extending up the center of the back is a brace or support 16, said brace extending down below the lower end of the back and secured centrally thereto is a bearing member or block 17 having spaced arms 18. Pivoted between the spaced members 18 on a pin 19 is the sliding bar 20, said bar being spaced between the members 18 by suitable washers 21. The sliding bar 20 is provided with a series of hole or apertures 22 which are adapted to be brought into coincidence with the apertures 23 in the parallel members 10. The sliding bar 20 is disposed between the parallel members 10 and springs 24 are connected to the bar 20 at 25 and the opposite end of said springs are connected at 26 near the top of the frame seat.

A vertical. push rod 27 extends down through a wooden brace member 28, and has a push button 29 upon its upper end. The lower end of the push rod 27 terminates in a recess 30 in the member 5, and is adapted to bear upon an elbow lever 31 pivoted at 32 in a block 33 secured by bolts 34 to the Seat rail or member 5. The arm 31 of the elbow lever 31 has pivoted to it a bolt 35, the end 36 of which is offset from the plane of the bolt 35. The end 36 of the bolt is mounted in the aperture 23 in the spaced members 10 and adapted to engage any one of the apertures or perforations 22 in the sliding bar 20. The bolt extends above the upwardly projecting bracket 33 and for holding the bolt projected, a spring 38 is connected at 39 to the bolt and the opposite end of said spring is connected at 40 to the side member 5 of the seat frame. The operative parts of the mechanism are located at the lower portion of the seat frame and a cushion is adapted to cover said parts and to be removed to render them easy of access in case of repairs.

The operation of the invention may be briefly described as follows: When the push rod 27 is pressed by means of the press button 29 engaged by the finger of the user, the

end 36 of the bolt is Withdrawn slightly from the sliding member 20 and the springs 24 then pull upon said bar 20 and have a tendency to pull the back up into vertical position. When the back of the user leans against the back of the chair and adjusts the desired inclination of said back, and the button 29 is released, the bolt will shoot in by the action of the spring 38 into the alined apertures in the sliding bar and the guides 10, and thus hold the back at the in clination desired.

From the foregoing it will be obvious that the chair back can be readily adjusted to any desired inclination by merely pressing upon the button 29 and leaning back on the chair to get the desired inclination when by release of the button the back of chair is held in the desired inclined position.

Various changes may be made in the details of construction Without departing from the spirit and scope of the invention as, defined in the claim.

What is claimed is 1- In a chair, the combination, with the frame, a hinged back and a sliding spring bolt, of a sliding bar having bolt-receiving perforations, spring members for holding said sliding bar against the under side of the chair frame, and a guide framerigidly secured to the front and back bars of the chair frame.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

ELVEARD T. VILLIAMSON.

W'itnesses:

LEO J. MGKENNA,

AMIEL PIERCE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.