US343626A - Piano and office chair - Google Patents
Piano and office chair Download PDFInfo
- Publication number
- US343626A US343626A US343626DA US343626A US 343626 A US343626 A US 343626A US 343626D A US343626D A US 343626DA US 343626 A US343626 A US 343626A
- Authority
- US
- United States
- Prior art keywords
- chair
- piano
- seat
- lever
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003467 diminishing Effects 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
- A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
- A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
Definitions
- My invention relates to improvements in chairs having a stationary seat and springback.
- the seat may have four legs, one in each corner, as a common chair, or it may be secured to a screw, as in piano and office chairs, having only a rotary motion, 'and not to chairs having a tilting seat, as in tilting chairs.
- the object of my invention is to provide a chair having a back so arranged in connection with a spring that it conforms to different positions when it is occupied by a person sitting in the chair and leaning backward, thereby forming a back-rest.
- Figure 1 represents a side (left) View of chair
- dotted lines representing chair in position when occupied with back pressed backward
- Fig. 2 represents bottom of chair as viewed from underneath.
- A is a stationary seat
- B an arm, one part passing around parallel with edge of seat, the other part joining back abouthalf-way up from seat, both parts being fastened to back, both arm and back working on a pivot at side of seat, which passes through lower part of arm and directly into side edge of seat;
- D a concave plate secured to seat, in which screw H fastens with a set-screw.
- Plate D also has bearings M, in which lever G rests.
- E isa coil-spring, one end of which hooks over end of lever G, while other end hooks ever end of lever F, which has a bearing at N, as shown in Fig. 2.
- a rod, K which extends through the chair-frame R at the side.
- One end of this rod is provided with a screw-thread and nut, O, which sets in an angular depression in one arm of the lever F, to prevent it from turning, and the opposite end is secured by means of a knob, J, rigidly attached thereto and bearing against the outer face of the chair-frame B.
- L is a friction pin and plate, and rolls between lever G and crosspiece O.
Landscapes
- Chairs Characterized By Structure (AREA)
Description
7 (No Model.) I
G. E. DAVIS.
PIANO AND OFFICE CHAIR. No. 343,626. Patented June 15,-1886.
fitness es lumen 02:
a: My PETERS. Phnwlillwgriphar, wminm n u.c.
UNITED STATES PATENT OrricE.
CHARLES E. DAVIS, OF COLUMBUS, OHIO.
PIANO AND OFFICE CHAIR.
SPECIFICATION forming part of Letters Patent No. 343,626, dated June 15, 1886.
Application filed November 23, 1885. Serial No. 183,816. (No model.)
To all whom it may concern:
Be it known that I, CHARLES E. DAVIS, of Columbus, county of Franklin, State of Ohio, have invented or discovered a new and useful Improvement in Piano and Office Chairs; and I do hereby declare the following to be a full, clear, and concise description thereof, reference being had to the accompanying drawings, making a part of this specification.
My invention relates to improvements in chairs having a stationary seat and springback. The seat may have four legs, one in each corner, as a common chair, or it may be secured to a screw, as in piano and office chairs, having only a rotary motion, 'and not to chairs having a tilting seat, as in tilting chairs.
The object of my invention is to provide a chair having a back so arranged in connection with a spring that it conforms to different positions when it is occupied by a person sitting in the chair and leaning backward, thereby forming a back-rest. I attain this object by the mechanism illustrated in the accompanying drawings, in which Figure 1 represents a side (left) View of chair, dotted lines representing chair in position when occupied with back pressed backward. Fig. 2 represents bottom of chair as viewed from underneath.
Similar letters refer to similar parts throughout the different views.
A is a stationary seat; B, an arm, one part passing around parallel with edge of seat, the other part joining back abouthalf-way up from seat, both parts being fastened to back, both arm and back working on a pivot at side of seat, which passes through lower part of arm and directly into side edge of seat; 0, a cr0ss-piece secured to lower end of back I, and resting upon lever G; D, a concave plate secured to seat, in which screw H fastens with a set-screw. Plate D also has bearings M, in which lever G rests. E isa coil-spring, one end of which hooks over end of lever G, while other end hooks ever end of lever F, which has a bearing at N, as shown in Fig. 2.
To one arm of lever F is secured a rod, K, which extends through the chair-frame R at the side. One end of this rod is provided with a screw-thread and nut, O, which sets in an angular depression in one arm of the lever F, to prevent it from turning, and the opposite end is secured by means of a knob, J, rigidly attached thereto and bearing against the outer face of the chair-frame B. By turning the knob J to the right or left the thread upon the end of the rod operates within the nut O and varies the tension of the spring, for the purpose of increasing and diminishing the resistance to the back P.
L is a friction pin and plate, and rolls between lever G and crosspiece O.
I do not herein claim to be the inventor, broadly, of a chair having a stationary seat in combination with a back adapted to move in the arc of a circle, and provided with springs, whereby the back will conform to the different positions assumed by the occupant of the chair.
What I claim as my invention, and wish to secure by Letters Patent, is-
1. The combination, in a chair, of a stationmy seat, a back having arms pivoted to the sides thereof, said back being provided with a friction-pin adapted. to bear upon the arm of 7 5 a lever pivoted below the seat, one arm of the lever being attached to a spring, and the other arm adapted to form a support to said back, substantially as described.
2. The combination, in a chair, of a stationary seat, a back pivoted thereto, a lever, one end of which is adapted to support said back and the other end attached to a spring, and mechanism for regulating the tension of said spring, substantially as described.
O. E. DAVIS.
In presence of- CHAS. T. CLARK, S. HAMBLETON.
Publications (1)
Publication Number | Publication Date |
---|---|
US343626A true US343626A (en) | 1886-06-15 |
Family
ID=2412702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US343626D Expired - Lifetime US343626A (en) | Piano and office chair |
Country Status (1)
Country | Link |
---|---|
US (1) | US343626A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1980002048A1 (en) * | 1979-03-26 | 1980-10-02 | Sredneaziat Nii Prirod Gaza | Device for electrophoretic rectification of drilling mud |
US5909924A (en) * | 1997-04-30 | 1999-06-08 | Haworth, Inc. | Tilt control for chair |
US20040227385A1 (en) * | 2003-03-04 | 2004-11-18 | Pro-Cord Spa | Chair with oscillating seat |
-
0
- US US343626D patent/US343626A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1980002048A1 (en) * | 1979-03-26 | 1980-10-02 | Sredneaziat Nii Prirod Gaza | Device for electrophoretic rectification of drilling mud |
US5909924A (en) * | 1997-04-30 | 1999-06-08 | Haworth, Inc. | Tilt control for chair |
US6015187A (en) * | 1997-04-30 | 2000-01-18 | Haworth, Inc. | Tilt control for chair |
US20040227385A1 (en) * | 2003-03-04 | 2004-11-18 | Pro-Cord Spa | Chair with oscillating seat |
US6929327B2 (en) * | 2003-03-04 | 2005-08-16 | Pro-Cord Spa | Chair with oscillating seat |
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