US168744A - Improvement in tilting chairs - Google Patents

Improvement in tilting chairs Download PDF

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Publication number
US168744A
US168744A US168744DA US168744A US 168744 A US168744 A US 168744A US 168744D A US168744D A US 168744DA US 168744 A US168744 A US 168744A
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Prior art keywords
improvement
arm
spring
tilting
seat
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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted frame
    • A47C7/443—Supports for the head or the back for the back with elastically-mounted frame with coil springs
    • A47C7/444—Supports for the head or the back for the back with elastically-mounted frame with coil springs of torsion type
    • 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 mounted in a rigid frame
    • A47C3/0252—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame connected only by an elastic member positioned between seat and base frame
    • 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 mounted in a rigid frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame with a central column, e.g. rocking office chairs; Tilting chairs
    • 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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted frame
    • A47C7/445—Supports for the head or the back for the back with elastically-mounted frame with bar or leaf springs

Definitions

  • Patented 0ct.11, 1875 Patented 0ct.11, 1875.
  • This invention is an improvement on the tilting chair patented to me January 5, 1875, (No. 158,492.)
  • My present improvement relates to the construction of the spring 'audits attachments.
  • the spring consists of a single rod with two coils, whose ends extend back in arms which have hearing beneath the back of the seat-trame. Between the coils is a stirrup, which is over the back bar or arm of the spider, and which bears against a lug ⁇ extending upward from thearm.
  • the coils of the spring are in recesses somewhat similar to those of my former patented chair, but more particularly intended to prevent the upward movement of the coils.
  • Figure 1 is a perspective view of the chair with the seat removed, to expose the novel features of construction, the View being taken from the front side.
  • Fig. 2 is a back perspective view of the chair-irons complete, on au enlarged scale.
  • Fig. 3 is a perspective view of the spring on a scale still more enlarged.
  • the legs are shown at A.
  • the upper ends of the legs are mortised, as usual, into the fixed nut B.
  • G is the vertical screw turning in the nut B.
  • the spider has front arm D and side arms E E, similarto those of my former patented chair.
  • the rear arm F of the spider has upon its upper side a lug or catch, G, against which bears the stirrup H of the spring.
  • the said stirrup straddles the arm F, and has at each side of the arm a coil, I, which terminates in a straight spring-arm, K, which has an upward bearing against the back of the seat-frame, the arms K having end movement, as the chair is tilted, in their bearings in the bearing-plate M, similar to that of H of my former patent.
  • N is a flange projecting from the middle of the spider above the coils, to prevent the rocking of the stirrup on the arm F.
  • the spring 'H I K tends ⁇ to tilt the seat forward against the stop-arm D, the arm F forming a stop to the backward tilting ot' the seat.

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  • Chairs Characterized By Structure (AREA)

Description

s; Herr-MAN.
irv.
Tilting-cha No.l68,744.
Patented 0ct.11, 1875.
INVENTUH. www' M MPE-TENS. PHDTc-LITHOGRAFHER. WASHINGTbN. D C.
UNTTED STATES PATENT GFFICE.
SEBASTIAN HOFFMAN, OF ST. LOUIS, MISSOURI.
IMPROVEMENT IN TILTING CHAIRS.
Specification forming part of Letters Patent No. 168.744, dated October l1, 1875; application filed June 21, 1875.
To all whom it may concern:
Be it known that I, SEBASTIAN HOFFMAN, of St. Louis, St. Louis county, State of Missouri, have invented a certain new and useful Improvement in Tilting Chairs, of which the following is a specification:
This invention is an improvement on the tilting chair patented to me January 5, 1875, (No. 158,492.) My present improvement relates to the construction of the spring 'audits attachments. The spring consists of a single rod with two coils, whose ends extend back in arms which have hearing beneath the back of the seat-trame. Between the coils is a stirrup, which is over the back bar or arm of the spider, and which bears against a lug` extending upward from thearm. The coils of the spring are in recesses somewhat similar to those of my former patented chair, but more particularly intended to prevent the upward movement of the coils.
A In the drawings, Figure 1 isa perspective view of the chair with the seat removed, to expose the novel features of construction, the View being taken from the front side. Fig. 2 is a back perspective view of the chair-irons complete, on au enlarged scale. Fig. 3 is a perspective view of the spring on a scale still more enlarged.
The legs are shown at A. The upper ends of the legs are mortised, as usual, into the fixed nut B. G is the vertical screw turning in the nut B. The spider has front arm D and side arms E E, similarto those of my former patented chair. The rear arm F of the spider has upon its upper side a lug or catch, G, against which bears the stirrup H of the spring. YThe said stirrup straddles the arm F, and has at each side of the arm a coil, I, which terminates in a straight spring-arm, K, which has an upward bearing against the back of the seat-frame, the arms K having end movement, as the chair is tilted, in their bearings in the bearing-plate M, similar to that of H of my former patent. N is a flange projecting from the middle of the spider above the coils, to prevent the rocking of the stirrup on the arm F. The spring 'H I K tends` to tilt the seat forward against the stop-arm D, the arm F forming a stop to the backward tilting ot' the seat.
I claim herein as my invention- The combination ot' spider D E F and seat L with the spring consisting of stirrup H, coils l I. and arms K K, having bearings G and M, respectively, upon the arm F, and beneath the seat-frame L, substantially as set forth.
SEBASTIAN HOFFMAN. Witnesses:
SAML. KNIGHT, CHARLES PIGKLES.
US168744D Improvement in tilting chairs Expired - Lifetime US168744A (en)

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US168744A true US168744A (en) 1875-10-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675887A (en) * 1971-01-14 1972-07-11 Seng Co The Chair control assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675887A (en) * 1971-01-14 1972-07-11 Seng Co The Chair control assembly

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