Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS629036 A
Publication typeGrant
Publication dateJul 18, 1899
Filing dateNov 7, 1898
Priority dateNov 7, 1898
Publication numberUS 629036 A, US 629036A, US-A-629036, US629036 A, US629036A
InventorsFrederick Koenigkramer
Original AssigneeFrank Koenigkramer, Frederick Koenigkramer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Revolving and reclining chair.
US 629036 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


(Application filed Nov. 7l 1898.)

(No Model.)

llnrrnn @rares APMFENT OFFICE..



SPECIFICATION forming part of Letters Patent No. 629,036, -clated July 18, 1899.

Application filed November 7, 1898. Serial No. 695,660. (No model.)

To all whom it may concern:

Beit known that I, FREDERICK Kennis.- KRAMER, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Revolving and Reclining Chairs, of which the following is a specification.

My invention relates to an improvement in revolvingl and reclining chairs, such as barber-chairs and dental chairs.

The l'eatures of my invention are more fully set forth in the description of the accompanying drawings, making a part of this specification, in whichu Figure l is a perspective view of a revolving and reclining chair. Fig. 2 is a top plan View ot' the operating mechanism with seat taken off. Fig. 3 is a central vertical section. Fig. 4 is a sectionon line a, Fig. 3. Fig. 5 is a detailed sectional View through the operating-lever and its eccentric sleeve. Fig 6 is a modification of Fig. 5.

The object of my invention is to simplify and strengthen the mechanism used to operate revolving and reclining chairs, and particularly that class of chairs which are controlled by the manipulation of a single cranklever.

A represents the chair portion, and B the pedestal, in which the operating mechanism is mounted.

C represents the hand-lever for operating the chair. naled in the sides D D of the revolving base of the chair.

E represents a slide-rod journaled in the sides F F of the base transverse to the operating-lever. To the front end of this rod the Y apron G'is hinged by means of a link-lever The shank C of this lever is jouri The apron is also hinged to the rods orarms H H, which are in turn hinged to the Upon the shank to bring this lug (l into engagement With the friction-plate the spring yields and the pivotal movement of the plate releases the sliding rod, allowing the chair to be inclined to the desired position. It Will also be obvious that this rod is locked by the friction-plate at all points of the operating-lever movement except thatin which thelug engages the plate. To this end I provide a bed-plate M, provided With a central oriee g and attached by screws h to the pedestal. The peripheral edges of this plate are preferably beveled. Upon this plate is journaled or supported a revolving base N, in which the operating mechanism is mounted. This base has its peripheral edges beveled to lit snugly in the supporting-plate M and is provided With a central orifice 71.', registering with the orifice g in the bed-plate. This bed-plate is shown as having depending central section N.. The base may have a corresponding projection, if desired, to afford greater bearing-surface; but the specific form of these parts is not material, and any bed plate adapted to movably support a revoluble base I regard as within my invention.

O represents-a straining eyebolt or rod passing through said oriices and provided with a nut 't' at its lower projecting end or otherwise suitably attached to said bed-plate. The upper end is provided with an eye j, through Which passes the eccentric sleeve L, mounted on the operating-lever.

It Will be observed that When the thinner portion of the eccentric sleeve is brought uppermost by the rotation of the crank-lever the bolt Will be relaxed, allowing the base and its supported parts to be revolved on the bedh plate, and when the lever is rotated in any other direction the eccentric portion of the IDO sleeve engages the ringj of the bolt O and strains the base to the plate, locking the chair against revolution.

For convenience of operation I preferably locate the thinner portion of the cam-sleeve in such relation to the eye j that the strainingbolt is only relaxed and the chair allowed to revolve at-the center portion of the handlever. This construction has another advantage over the ratchet-teeth hitherto used for this purpose in that the chair provided With my improvement may be adjusted in its revolution to any fraction of an inch desired,where as with the ratchet-teeth the chair could be adjusted only at intervals determined by the size and number of ratchet-teeth. Further, this form of locking mechanism both for revolving and inclining the chair is convenient, cheap, and more su bstantal than those hitherto employed in chairs of this description.

Having described my invention, what I claim is I. In a reclining and revoluble chair, the

combination of a pedestal, a bed-plate supported thereon, a hollow base-plate revolubly mounted therein, a chair member mounted on the base-plate, a sliding` rod hinged to the movable chair parts,having its bearings in the walls of the base-plate, a spring-controlled friction-plate mounted in said base-plate and normally engaging said sliding rod, a straining-rod connected tothe pedestal at one end, a levor having its bearings in the walls of said base-plate, an eccentric connection between said lever and the upper end of the strainingrod and a tripping-lu g form ed on the lever and adapted to engage the friction-plate whereby the said chair may be revolved and reclined locked and unlocked, independently by the verse lever having its bearings in the walls ofv said base-platein a different horizontal plane from the sliding rod, an eccentric and a tripping-lu g formed on said lever, an eyebolt connected to the pedestal at one end and to the said eccentric at the other end whereby the chair may be independently reclined, revolved, locked and unlocked at different points ot` said lever movement, substantially as specified.

In testimony whereof I have hereunto set my hand.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4588226 *Dec 23, 1983May 13, 1986Erda, Inc.Adjustable chair for aircraft and the like
US4671572 *Jun 19, 1985Jun 9, 1987Erda, Inc.Adjustable chair having roller cam adjustment mechanism
US4779921 *Aug 31, 1987Oct 25, 1988Holmstroem Erik FAdjustable chair
US7059680Sep 23, 2004Jun 13, 2006Crown Equipment CorporationSeat repositioning device with release on control handle
US7121608Sep 23, 2004Oct 17, 2006Crown Equipment CorporationRotating and/or swiveling seat
US7347299Oct 9, 2006Mar 25, 2008Crown Equipment CorporationRotating and/or swiveling seat
US7350866Mar 14, 2006Apr 1, 2008Crown Equipment CorporationSeat repositioning device with release on control handle
US7520567Sep 23, 2004Apr 21, 2009Crown Equipment CorporationSystems and methods for seat repositioning
US20060061122 *Sep 23, 2004Mar 23, 2006Billger Steven CRotating and swiveling seat
US20060061177 *Sep 23, 2004Mar 23, 2006Billger Steven CSystems and methods for seat repositioning
US20060061178 *Sep 23, 2004Mar 23, 2006Billger Steven CSeat repositioning device with release on control handle
US20060152052 *Mar 14, 2006Jul 13, 2006Crown Equipment CorporationSeat repositioning device with release on control handle
US20070074923 *Oct 9, 2006Apr 5, 2007Crown Equipment CorporationRotating and/or swiveling seat
Cooperative ClassificationA47C1/035