US210779A - Improvement in springs for tiltsng-chairs - Google Patents
Improvement in springs for tiltsng-chairs Download PDFInfo
- Publication number
- US210779A US210779A US210779DA US210779A US 210779 A US210779 A US 210779A US 210779D A US210779D A US 210779DA US 210779 A US210779 A US 210779A
- Authority
- US
- United States
- Prior art keywords
- seat
- chairs
- stand
- improvement
- springs
- 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
- 239000002965 rope Substances 0.000 description 8
- 229940035295 Ting Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 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
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/02—Rocking chairs
- A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
- A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S256/00—Fences
- Y10S256/04—Board fastener
Definitions
- A represents the seat of a chair
- B the post, the lower portion of which has ascrew-thread adapted to an internally-threaded socket of a stand, as in ordinary office-chairs.
- a torsion-spring preferably a piece of wire rope, Gr, similar to that referred to in the Letters Patent No. 203,739, granted to the Hale & Kilburn Manufacturing Company, assignee or" Cheney Kilburn, May 14, 1878, is passed through all fonrlugs, and is secured byapin or otherwise to the lug d of the seat and the lu g e of the stand, the rope passing freely through the lug e of the stand and the lug d of the seat.
- the wire rope G in addition to the duty which it performs as a torsion-spring, which permits the seat to be rocked, also serves as a support for the seatand as a pivot-pin.
- wire rope for a torsionspring may consist of a rod, Fig'. 3, rounded at and near the opposite ends, Where it passes through the lugs, and ilattened in the middle, Where it can yield under torsion.
- I claim as my invention- The combination of a chair-seat having two lugs or projections, d d', and a stand having two lugs or projections, c e', with a torsion, spring, G, secured at one end to one lug, d.,
Landscapes
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Description
H. HOWSON. Spring for Ti1ting-Ghar. No. 21,0,4779 Patented uw. 10,1878` jcf.
l maman l UNITED STATES PATEN FFICe HENRY HOWSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE HALE di, KILBURN MANUFACTURING COMPANY, OE SAME PLACE.
IMPROVEMENT IN SPRINGS FOR TILTING-CHAIRS.
Specification forming part of Letters Patent No. 210,779, dated December I0, 1878; application filed August 15, 1878.
To all whom t may concern:
Be it known that I, HENRY HoWsoN, of Philadelphia, Pennsylvania, have invented a new and useful Improvement in Springs for Chairs, die., of which the following is a specification The object ot' my invention is to combine with a chair an economical device for permit.- ting the seat of the chair to be rocked, and this object I attain in the following manner, reference being` had to the accompanying drawings, in whicl1- Figure l is a front view, partly in section, of the sea-t and part of the stand of a chair with my improvement; Fig. 2, a side view of the same; and Fig. 3, a modified form of tor sion-spring which may be adopted in carrying out my invention.
In Figs. 1 and 2, A represents the seat of a chair, and B the post, the lower portion of which has ascrew-thread adapted to an internally-threaded socket of a stand, as in ordinary office-chairs. There are on the under side ot' the seat two project-ions or lugs, Z d', which, in the present instance, form a part of a plate, D, secured to the said seat; and there are two similar projections or lugs, c c', on a cross-bar, E, secured to or `forming a part of the post .B or these lugs c e maybe secured to any suitable stand or support when a swivelseat capable of vertical adjustmentis not required.
A torsion-spring, preferably a piece of wire rope, Gr, similar to that referred to in the Letters Patent No. 203,739, granted to the Hale & Kilburn Manufacturing Company, assignee or" Cheney Kilburn, May 14, 1878, is passed through all fonrlugs, and is secured byapin or otherwise to the lug d of the seat and the lu g e of the stand, the rope passing freely through the lug e of the stand and the lug d of the seat.
The wire rope G, in addition to the duty which it performs as a torsion-spring, which permits the seat to be rocked, also serves as a support for the seatand as a pivot-pin.
In carrying out my invention I am not restricted to the use of wire rope for a torsionspring. The latter, for instance, may consist of a rod, Fig'. 3, rounded at and near the opposite ends, Where it passes through the lugs, and ilattened in the middle, Where it can yield under torsion.
I do not desire to claim the combination of a torsion-sprin g with the seat and stand of a chair, nor a torsion-spring which also serves to pivot thc seat to the stand; but
I claim as my invention- The combination of a chair-seat having two lugs or projections, d d', and a stand having two lugs or projections, c e', with a torsion, spring, G, secured at one end to one lug, d.,
` of the seat and at the opposite end to the lug c ot the stand, and iittin g freely in the lngd ot the seat and in the lug e of thc stand, all
set forth.
In testimony whereof I have signed my name to this specification iu the presence of two subscribing witnesses.
HENRY HOWSON.
Nit-n esses z HARRY A. CRAWFORD, HARRY SMITH.
Publications (1)
Publication Number | Publication Date |
---|---|
US210779A true US210779A (en) | 1878-12-10 |
Family
ID=2280186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US210779D Expired - Lifetime US210779A (en) | Improvement in springs for tiltsng-chairs |
Country Status (1)
Country | Link |
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US (1) | US210779A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2778409A (en) * | 1955-04-28 | 1957-01-22 | Manton Ahlberg H | Control for posture chairs |
US2845991A (en) * | 1955-04-28 | 1958-08-05 | Manton Ahlberg H | Chair control or iron |
US2971569A (en) * | 1956-08-16 | 1961-02-14 | Bassick Co | Tiltable office chair |
-
0
- US US210779D patent/US210779A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2778409A (en) * | 1955-04-28 | 1957-01-22 | Manton Ahlberg H | Control for posture chairs |
US2845991A (en) * | 1955-04-28 | 1958-08-05 | Manton Ahlberg H | Chair control or iron |
US2971569A (en) * | 1956-08-16 | 1961-02-14 | Bassick Co | Tiltable office chair |
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