US149755A - Improvement in tilting chairs - Google Patents
Improvement in tilting chairs Download PDFInfo
- Publication number
- US149755A US149755A US149755DA US149755A US 149755 A US149755 A US 149755A US 149755D A US149755D A US 149755DA US 149755 A US149755 A US 149755A
- Authority
- US
- United States
- Prior art keywords
- rod
- seat
- spider
- improvement
- arms
- 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
- 241000239290 Araneae Species 0.000 description 18
- 239000000203 mixture Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000001105 regulatory Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000004904 shortening 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
-
- 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
- A47C7/4454—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 of torsion type
Definitions
- Our invention consists in a radial bearingframe or spider, formed journaled to the seat, and with front and back arms, which serve as stops to limit the inelination of the back and seat, and admit of its adjustment, there being combined with such constructed spider a steel rod, which acts as a spring to sustain the. seat in its normal position, a suitable device being employed, in
- A is the base or pedestal; B, the spider, having its axis in the base A, which consists, preferably, of a threaded bolt or rod, whereby the seat can be raised or lowered at will, in a manner well understood.
- the two lateral arms I) I) of the spider are journaled in bracketed bearings c 0, attached to the frame of the seat D, by means of which the seat portion of the chair is permitted to oscillate back and forward, its motion being limited by the front arm (Z and back one 6.
- the lateral pivoted arms I) b are arranged a little forward of the axis of the spider, so that the weight of the occupant will preponderate toward the back, and thereby afford an easy and comfortable seat; and at a point preferably over the axis, we arrange a rod, E, secured at both ends in the brackets c c, and its middle portion bearing on the spider.
- the rod E rigidly attached at its ends to the seat by brackets, in combination with a spider, constructed substantially as described, so that when the seat is inclined backward the rod is twisted and bent by the leverage, and becomes torsional in its action, as and for the purposes specified;
- brackets c a forming bearings for the arms I) b and rod E, in combination with a spider constructed with arms for limiting the motion of the seat D, and a bearing for twisting and bending the rod E, substantially as and for the purpose described.
Description
H. M. HUTC HINSUN & M. F. HUTCHINS.
Tilting-Chairs. I
' Patented Aprii14, 1874.
M U M UNITED STATES PATET M ERRITT F. HUTOHINS, OF CAMDEN, NEW JERSEY.
IMPROVEMENT IN TILTING CHAIRS.
Specification forming part of Letters Patent No. 149,755, dated April 14, 1874 application filed March 16, 1874.
To all whom it may concern;
Be it known that We, HENRY M. HUTCHIN- soN, of Philadelphia, Pennsylvania, and MER- RITT F. HUTOHINS, of Camden, New Jersey, have invented certain new and useful Improvements in Tilting Chairs, of which the following is a specification:
' Our invention consists in a radial bearingframe or spider, formed journaled to the seat, and with front and back arms, which serve as stops to limit the inelination of the back and seat, and admit of its adjustment, there being combined with such constructed spider a steel rod, which acts as a spring to sustain the. seat in its normal position, a suitable device being employed, in
some instances, for regulating said rod or spring.
In the drawings, Figure his a plan view with the seat removed, and Fig. 2 a sectional elevation 011 the line as x of Fig.1.
As represented in the drawings, A is the base or pedestal; B, the spider, having its axis in the base A, which consists, preferably, of a threaded bolt or rod, whereby the seat can be raised or lowered at will, in a manner well understood. The two lateral arms I) I) of the spider are journaled in bracketed bearings c 0, attached to the frame of the seat D, by means of which the seat portion of the chair is permitted to oscillate back and forward, its motion being limited by the front arm (Z and back one 6. The lateral pivoted arms I) b are arranged a little forward of the axis of the spider, so that the weight of the occupant will preponderate toward the back, and thereby afford an easy and comfortable seat; and at a point preferably over the axis, we arrange a rod, E, secured at both ends in the brackets c c, and its middle portion bearing on the spider. The connection with the seat being rigid, when the latter is inclined backward, the rod at its middle portion is twisted and bent by the leverage of the seat and back acting on its extreme ends, and as soon as the chair is vathe tensionof with its side arms cated orrelieved from weight, the reaction of this rod restores it to its normal upright position. We prefer to use a flat steel rod for this purpose, so that, bya considerable deflection of the seat, the action of the rod becomes torsional, in consequence of which, more resistant power is obtained from a small rod, and the tendency to become loose in the fastenings by the shortening of the rod as bent is obviated. This rod is held by square or oblong slots, in which its ends are received in the same brackets in which the spider-arms b b are journaled. The force of the spring is regulated by means of the bearing plate or collar f and set-screw g. i
This mode of employing the rod is simple and effective, and obviates the objections which appertain to flat and spiral springs for this purpose. I
We claim as our invention- 1. The rod E, rigidly attached at its ends to the seat by brackets, in combination with a spider, constructed substantially as described, so that when the seat is inclined backward the rod is twisted and bent by the leverage, and becomes torsional in its action, as and for the purposes specified;
2. In combination with the rod E, aflixed to the seat and bearing on the spider B, the ad justing-screw g and bearing-collar f, substantially as set forth.
3. The brackets c a, forming bearings for the arms I) b and rod E, in combination with a spider constructed with arms for limiting the motion of the seat D, and a bearing for twisting and bending the rod E, substantially as and for the purpose described.
In testimony that we claim the foregoing, we have hereunto set our hands this 12th day of March, 1874.
HENRY M. HUT-GHINSON. MERRITT F. HUTCHINS. Witnesses:
B. RICHARDSON, JOHN H. MALLETT.
Publications (1)
Publication Number | Publication Date |
---|---|
US149755A true US149755A (en) | 1874-04-14 |
Family
ID=2219168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US149755D Expired - Lifetime US149755A (en) | Improvement in tilting chairs |
Country Status (1)
Country | Link |
---|---|
US (1) | US149755A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424753A (en) * | 1947-07-29 | herold | ||
US2845991A (en) * | 1955-04-28 | 1958-08-05 | Manton Ahlberg H | Chair control or iron |
-
0
- US US149755D patent/US149755A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424753A (en) * | 1947-07-29 | herold | ||
US2845991A (en) * | 1955-04-28 | 1958-08-05 | Manton Ahlberg H | Chair control or iron |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US149755A (en) | Improvement in tilting chairs | |
US786326A (en) | Spring-back for chairs. | |
US163705A (en) | Improvement in tilting chairs | |
US170561A (en) | Improvement in tilting chairs | |
US478131A (en) | Arthur m | |
US120382A (en) | Improvement in tilting-chairs | |
US321816A (en) | Tilting chair | |
US139948A (en) | Improvement in chairs | |
US207741A (en) | Improvement in dental chairs | |
US163790A (en) | Improvement in pivot-chairs | |
US117915A (en) | Improvement in chairs | |
US404628A (en) | William pinkney james | |
US647178A (en) | Type-writer's chair. | |
US113967A (en) | Improvement in revolving chairs | |
US542941A (en) | Robert parker | |
US360589A (en) | John harbington | |
US630159A (en) | Barber's chair. | |
US240888A (en) | Tilting chair | |
US202576A (en) | Improvement in oscillating chairs | |
US354042A (en) | connolly | |
US544472A (en) | w atkins | |
US807078A (en) | Tripod-head. | |
US1281795A (en) | Fan attachment for rocking-chairs. | |
US177350A (en) | Improvement in tilting chairs | |
US138544A (en) | Improvement in tilting chairs |