US2034412A - Construction of a sitting device - Google Patents

Construction of a sitting device Download PDF

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Publication number
US2034412A
US2034412A US568432A US56843231A US2034412A US 2034412 A US2034412 A US 2034412A US 568432 A US568432 A US 568432A US 56843231 A US56843231 A US 56843231A US 2034412 A US2034412 A US 2034412A
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United States
Prior art keywords
spring
chair frame
seat
chair
construction
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Expired - Lifetime
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US568432A
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Neutra Richard Joseph
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Individual
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Individual
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Priority to US568432A priority Critical patent/US2034412A/en
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    • 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
    • A47C3/021—Rocking chairs having elastic frames
    • 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
    • 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
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

Definitions

  • Subject matter of my invention is a chair, the seat of which is supported by a spring system which is fastened at its ends to supporting members of the chair frame,one of such members being 5 placed at the front of the chair frame on a level immediately below the seat, the other of such members being placed on a lower level and on the rearside of the chair frame.
  • the mentioned spring system comprises pref- 10 erably one or several spring blades, which run out in an essentially horizontal direction when starting from the frontal support-member whereas the rear portion of these spring blades which forms the continuation of the horizontal portion is bent 15 down in a backward convex curve; the end of this rear portion is fastened to the rear lower support at the chair frame.
  • the seat base is combined with stability.
  • the springs or the system of springs crossbars of the chair frame can be used as supporting members for 20.
  • the chair frame can comprise two side parts interconnected by the above mentioned crossbars. Each of these side parts of the chair frame can be 25 constructed out of bent rigid metal rods or metal tubings.
  • FIG. 1 shows a vertical section view
  • Fig. 2 a plan
  • Fig. 3 a front view of the chair
  • Fig. 4 is a view in perspective of the chair, as seen from below the lower surface of the seat.
  • the chair frame consists of two side parts 9, g, each of which is formed out of a metal 5 rod or tubing bent to have the shape of a as shown in the drawing; and of crossbars, rods or tubings b, c, d which connect the two side parts 9, g of the framework to one another.
  • the vertical portions of the [-shaped side parts 9, g are 4 situated at the front of the chair frame.
  • the crossbar b connecting the vertical portions of the side parts g, g to one another is fastened in the height of the support of the seat.
  • the crossbar c is fastened to the ends of the lower horizontal por- 45 tion of the side parts 9, g and is situated below the hind-part of the seat support on a lower level than that of crossbar b so as to be in immediate contact with the floor.
  • a spring blade f serves as a support for the seat 50 which for instance may be a leather cushion or the like.
  • This spring blade is attached with its frontal end to the crossbar b and with its rear end to the crossbar 0. Beginning at b, the spring blade 1 first extends in a horizontal direction and is then 55 bent down in a backward convex curve to reach the rear lower crossbar c.
  • the seat indicated in the drawing by e is disposed upon the horizontal straight portion of thespring blade 1 and may be fixed thereto in any suitable manner.
  • the spring blade 1 Under the load of a sitting person the spring blade 1 is deformed in such a manner that the horizontal straight portion of the spring blade held in its position by the curved portion of the spring, is turned down around an axis represented by crossbar I) which angle-movement is allowed by the amplification of the curvature of the rear portion of the spring blade.
  • a chair comprising spaced upright side frames, a front bar joining said side frames intermediate their height, a rear bar joining the side frames at a level below said front bar and rearwardly thereof, a spring blade connected at one end to said front bar and having a straight 5 horizontal portion extending from the front bar substantially to the rear of said side frames, said spring blade having an extension at the rear of said horizontal portion curved downwardly and connected to said rear bar, and a seat member carried by said spring blade.
  • the combination with a rigid chair frame, of a spring blade for supporting the load of a sitting person said chair frame comprising spaced upright side frames, a front bar joining said side frames intermediate their height and a rear bar joining the side frames at a level below said front bar and rearwardly thereof, said spring blade being connected at one end to said front bar and having a straight horizontal portion extending from the front bar substantially to the rear of said side frames and an extension at the rear of said horizontal portion curved downwardly and connected to said rear bar.

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  • Chairs Characterized By Structure (AREA)

Description

CONSTRUCTION OF A SITTING DEVICE FiledDct. 12, 1951 .IIIlIIIILI III Patented Mar. 17, 1936 UNITED STATES PATENT OFFICE 2 Claims.
Subject matter of my invention is a chair, the seat of which is supported by a spring system which is fastened at its ends to supporting members of the chair frame,one of such members being 5 placed at the front of the chair frame on a level immediately below the seat, the other of such members being placed on a lower level and on the rearside of the chair frame.
The mentioned spring system comprises pref- 10 erably one or several spring blades, which run out in an essentially horizontal direction when starting from the frontal support-member whereas the rear portion of these spring blades which forms the continuation of the horizontal portion is bent 15 down in a backward convex curve; the end of this rear portion is fastened to the rear lower support at the chair frame.
In this way elasticity of the seat base is combined with stability. As supporting members for 20 the springs or the system of springs crossbars of the chair frame can be used.
The chair frame can comprise two side parts interconnected by the above mentioned crossbars. Each of these side parts of the chair frame can be 25 constructed out of bent rigid metal rods or metal tubings.
One mode of construction of such a chair is shown in the attached drawing; wherein Fig. 1 shows a vertical section view, Fig. 2 a plan and 30 Fig. 3 a front view of the chair. Fig. 4 is a view in perspective of the chair, as seen from below the lower surface of the seat.
In this case the chair frame consists of two side parts 9, g, each of which is formed out of a metal 5 rod or tubing bent to have the shape of a as shown in the drawing; and of crossbars, rods or tubings b, c, d which connect the two side parts 9, g of the framework to one another. The vertical portions of the [-shaped side parts 9, g are 4 situated at the front of the chair frame. The crossbar b connecting the vertical portions of the side parts g, g to one another is fastened in the height of the support of the seat. The crossbar c is fastened to the ends of the lower horizontal por- 45 tion of the side parts 9, g and is situated below the hind-part of the seat support on a lower level than that of crossbar b so as to be in immediate contact with the floor.
A spring blade f serves as a support for the seat 50 which for instance may be a leather cushion or the like. This spring blade is attached with its frontal end to the crossbar b and with its rear end to the crossbar 0. Beginning at b, the spring blade 1 first extends in a horizontal direction and is then 55 bent down in a backward convex curve to reach the rear lower crossbar c. The seat indicated in the drawing by e is disposed upon the horizontal straight portion of thespring blade 1 and may be fixed thereto in any suitable manner.
Under the load of a sitting person the spring blade 1 is deformed in such a manner that the horizontal straight portion of the spring blade held in its position by the curved portion of the spring, is turned down around an axis represented by crossbar I) which angle-movement is allowed by the amplification of the curvature of the rear portion of the spring blade.
In spite of the curved shape of the spring blade, which assures a high degree of elasticity stability of the seat-support is secured in so far as a deformation of the spring in a longitudinal direction cannot occur. A transversal deformation of the spring can be avoided by giving to the blade suflicient cross dimensions or breadth and giving to its ends a proper connection to the supporting crossbars b and c.
It is obvious that the chair frame and the spring system which is destined to support the seat as well as the shape and the mode of fastening the system of springs to the chair frame can be executed in various ways, and I therefore do not wish to have my invention confined to just the form of execution which is exemplified on the annexed drawing.
What I claim as my invention is:
1. A chair comprising spaced upright side frames, a front bar joining said side frames intermediate their height, a rear bar joining the side frames at a level below said front bar and rearwardly thereof, a spring blade connected at one end to said front bar and having a straight 5 horizontal portion extending from the front bar substantially to the rear of said side frames, said spring blade having an extension at the rear of said horizontal portion curved downwardly and connected to said rear bar, and a seat member carried by said spring blade.
2. As an article of manufacture the combination with a rigid chair frame, of a spring blade for supporting the load of a sitting person, said chair frame comprising spaced upright side frames, a front bar joining said side frames intermediate their height and a rear bar joining the side frames at a level below said front bar and rearwardly thereof, said spring blade being connected at one end to said front bar and having a straight horizontal portion extending from the front bar substantially to the rear of said side frames and an extension at the rear of said horizontal portion curved downwardly and connected to said rear bar.
RICHARD JOSEPH NEUTRA.
US568432A 1931-10-12 1931-10-12 Construction of a sitting device Expired - Lifetime US2034412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US568432A US2034412A (en) 1931-10-12 1931-10-12 Construction of a sitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US568432A US2034412A (en) 1931-10-12 1931-10-12 Construction of a sitting device

Publications (1)

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US2034412A true US2034412A (en) 1936-03-17

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US568432A Expired - Lifetime US2034412A (en) 1931-10-12 1931-10-12 Construction of a sitting device

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970639A (en) * 1958-03-21 1961-02-07 Harter Corp Chair
US6435615B1 (en) * 2000-08-08 2002-08-20 Otto Zapf Seating furniture with downwardly movable, pivoting backrest
US20090224576A1 (en) * 2008-03-04 2009-09-10 Ziming Shen Knockdown chair having reinforced side supports
US11266244B2 (en) * 2018-02-16 2022-03-08 Barrett Studios, Inc. Chair assembly
US20220378208A1 (en) * 2019-06-17 2022-12-01 Quali Co., Ltd. Tilt chair
US11559141B2 (en) * 2019-08-30 2023-01-24 Itoki Corporation Chair

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970639A (en) * 1958-03-21 1961-02-07 Harter Corp Chair
US6435615B1 (en) * 2000-08-08 2002-08-20 Otto Zapf Seating furniture with downwardly movable, pivoting backrest
US20090224576A1 (en) * 2008-03-04 2009-09-10 Ziming Shen Knockdown chair having reinforced side supports
US7775590B2 (en) * 2008-03-04 2010-08-17 Ziming Shen Knockdown chair having reinforced side supports
US20100301657A1 (en) * 2008-03-04 2010-12-02 Ziming Shen Knockdown chair having reinforced side supports
US7997651B2 (en) * 2008-03-04 2011-08-16 Ziming Shen Knockdown chair having reinforced side supports
US11266244B2 (en) * 2018-02-16 2022-03-08 Barrett Studios, Inc. Chair assembly
US20220378208A1 (en) * 2019-06-17 2022-12-01 Quali Co., Ltd. Tilt chair
US11559141B2 (en) * 2019-08-30 2023-01-24 Itoki Corporation Chair

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