US193433A - Improvement in tilting chairs - Google Patents

Improvement in tilting chairs Download PDF

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US193433A
US193433A US193433DA US193433A US 193433 A US193433 A US 193433A US 193433D A US193433D A US 193433DA US 193433 A US193433 A US 193433A
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chair
improvement
tilting
chairs
jaws
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C3/00Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02Rocking chairs
    • A47C3/025Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026Rocking 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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  • FIG. 1 is a perspective view of my im-' proved chair, a portion of the seat being removed, so as to show the supporting mechanism.
  • Fig. 2 is a vertical section upon a line passing transversely in front of the center of said chair; and Figs. 3 and 4 are similar views upon line a; a; of Fig. 2, and show, respectively, the seat in its normal position and when tilted.
  • the design of my invention is to increase the ease and durability of tilting or rocking chairs; and to this end it consists in the peculiar construction of the pivotal spring and its supporting mechanism, and their combination with the chair, substantially as and for the purpose hereinafter shown.
  • A represents the front rail
  • B the rear rail
  • O and O the side rails which form the frame of the seat of a chair of ordinary construction.
  • a spider which consists of a horizontal bar, G, and a transverse bar, G, which is placed at right angles to the former, and extends in a double curve downward and rearward, as seen in Figs. 3 and 4.
  • each end of the bar G are provided two jaws, g, similar to the jaws d before de scribed, which extend upward and grasp a flattened portion of the rod E just inside of the side rail O.
  • Y Upon each end of the bar G are provided two jaws, g, similar to the jaws d before de scribed, which extend upward and grasp a flattened portion of the rod E just inside of the side rail O.
  • the spring-rod E is slightly twisted, so as to produce a torsional strain in such direction as to cause the chair to automatically turn to the forward limit of its motion, in which position the bar D rests upon the upper forward,
  • torsion-spring E performs a double office, by returning the chair, when unobstructed, to its normal position, and by serving as a pivotal bearing for and upon which said chair rocks.

Description

J. WHITE.
TILTING-CHAIR. 193,433.
2 Sheets-Sheet1.
Patented July 24, 1877.
MPETERS. FHOTO-LITHOGRAPHER, WASHINGTON, Dv C.
2 Sheets-Sheet 2.
J. WHITE.
I TILTING-CHAIR.
No. 193,433, Patented July 24,1877.
UNITED S'ra'rns aren't rrrcn.
JOHN WHITE, OF NORWICH, NEW YORK.
IMPROVEMENT IN TILTING CHAIRS.
Specification forming part of Letters Patent No. 193,433, dated July 24, 1877; application filed J une 22, 1877.
To all whom it may concern:
Be it known that I, JOHN WHITE, of Norwich, in the county of Ohenango, and in the State of New York, have invented certain new and useful Improvements in Tilting Chairs; and do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, making a part of this specification, in which Figure 1 is a perspective view of my im-' proved chair, a portion of the seat being removed, so as to show the supporting mechanism. Fig. 2 is a vertical section upon a line passing transversely in front of the center of said chair; and Figs. 3 and 4 are similar views upon line a; a; of Fig. 2, and show, respectively, the seat in its normal position and when tilted.
Letters of like name and kind refer to like parts in each of the figures.
The design of my invention is to increase the ease and durability of tilting or rocking chairs; and to this end it consists in the peculiar construction of the pivotal spring and its supporting mechanism, and their combination with the chair, substantially as and for the purpose hereinafter shown.
In the annexed drawings, A represents the front rail, B the rear rail, and O and O the side rails which form the frame of the seat of a chair of ordinary construction.
Secured to and extending between the longitudinal centers of the front and rear rails, A
and B respectively, is a metal bar, D, which, slightly in rear of its longitudinal center, is provided with two jaws, d, that extend downward in parallel lines, and receive the central flattened portion of a steel rod, E. The ends of said rod E are loosely confined upon the lower side near the longitudinal center of the rails C.
Attached to a stool, F, or other suitable support, is a spider, which consists of a horizontal bar, G, and a transverse bar, G, which is placed at right angles to the former, and extends in a double curve downward and rearward, as seen in Figs. 3 and 4.
Upon each end of the bar G are provided two jaws, g, similar to the jaws d before de scribed, which extend upward and grasp a flattened portion of the rod E just inside of the side rail O. Y
The spring-rod E is slightly twisted, so as to produce a torsional strain in such direction as to cause the chair to automatically turn to the forward limit of its motion, in which position the bar D rests upon the upper forward,
end of the bar G, as seen in Fig. 3.
The position of the chair described is normal, and will not be changed by ordinary use; but when its occupant desires, he may tilt the chair rearward to the position shown in Fig. 4, by simply throwing his weight against the back, during which operation the spring-rod E will be twisted by the motion of the'jaws d, that grasp its center, the ends of said rod being prevented from turning in such direction by the jaws g.
It will be seenthat the torsion-spring E performs a double office, by returning the chair, when unobstructed, to its normal position, and by serving as a pivotal bearing for and upon which said chair rocks.
Although my invention is intended, principally, for use upon swiveled office-chairs, I also propose to use it upon rocking-chairs, for which latter it is peculiarly applicable.
Having thus fully set forth the nature and merits of my invention, what I claim as new is The bar D, provided with the jaws d, the spring-rod E, and the spider G and G, havin g the jaws g, in combination with each other, the chair, and a stool or other support, substantially as and for the purpose shown.
In testimony that I claim the foregoing I have hereunto set my hand this 15th day of' January, 187 7 JOHN WHITE.
Witnesses:
R. B. PRINDLE, GEo. A. THOMAS.
US193433D Improvement in tilting chairs Expired - Lifetime US193433A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3544159A (en) * 1968-05-10 1970-12-01 Consolidated Burris Intern Ltd Tiltable chair construction
US20100150307A1 (en) * 2008-12-12 2010-06-17 Lee Grodzins Automated Sum-Peak Suppression in an X-Ray Fluorescence Analyzer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3544159A (en) * 1968-05-10 1970-12-01 Consolidated Burris Intern Ltd Tiltable chair construction
US20100150307A1 (en) * 2008-12-12 2010-06-17 Lee Grodzins Automated Sum-Peak Suppression in an X-Ray Fluorescence Analyzer

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