US1474304A - Electric table lamp with brake-controlled supporting arms for incandescent lamps - Google Patents

Description

v 1,474,304 G. WEBER BRAKE CONTROLLED SUPPORTING ARMS FOR Nov. 13 1923.

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I'm 227E Mi ne ELECTRIC TABLE LAMP WITH G. Weber.

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Patented Nov. 13, 1923.

' F 1! f E enoae WEBER, or EGELSBACI-I, sEaMANY,.AssIe1\Ton TO THE FIRM o. a w. BOI-INYERT,

OE EBANKFOB'roN-THE-MAIn, GERMANY.

Etncrnrc TAIBLIE'LAM-P"WITH BRAKE-CONTROLLED surron'rrne ARMS ron INCAN- DESCENT LAMPS.

Application filed December 29, 1921. "Serial No. 525,684;

To all who-mat may-concern:

Be it known that I, GEORG WEBER, a citizen of the German Republic, residing at Egelsbach, Germany, have invented certain new and useful Improvements in Electric Table Lamps with Brake-Controlled Supporting Arms for Incandescent Lamps, of which the following is a specification.

This invention relates to an electric table lamp with a movable lamp support. The

invention solves in a slmple manner the problem of permitting the arm which supports the incandescent lamp to be lowered under the action of a brake and to be returned to the initial position without being influenced by the brake. The essential feature of the invention consists in a ratchet drive mounted in the foot of the table lamp so that it can be stopped at any part of its revolution and in the construction of the supporting arm as a ratchet lever. The side wall of the lamp foot serve as bearings for a bolt which carries the ratchet wheel and as a guide for the foot of the support ing arm upon which the pawl engaging with the ratchet wheel is directly fixed. The supporting arm is adapted to slide in a circumferential slit in the box-shaped upright casing, and carries a strip of sheet metal which closes the slit. The braking of the ratchet wheel is effected by members which press against the lateral surfaces, for instance by means of cheeks which are lined with leather disks and are adjustably spaced.

In order to make the invention clearly understood, 1 shall proceed to describe the same with reference to the form of construction as a lamp for a bed-side table shown by way of example on the accompanying drawing, wherein:

Figs. 1, 2 and 3 show the lamp respectively in side elevation, front elevation and plan view. 7

Figs. 4c and 5 are respectively, a transverse section and a longitudinal section through the lamp-foot.

Fig. 6 is a plan view of the lamp foot partly in section.

The upright casing s, essentially of the shape of a flat box which serves as a foot for the lamp, is mounted upon the base plate 7". An axle b is journalled in the side walls of the casing and a ratchet wheel 9 is keyed upon saidaxle. Two checks 6 project up wardly into the casing s. v The bolt Z) trav erses corresponding holes of said cheeks which are supported by a connecting pin is, fixed in an intermediate bottom f, in such a manner, that the inner surfaces of the checks, which are lined with I rotatable leather disks m, are pressed against the surfaces ofv the ratchet wheel 9. Cotter pins n which traverse the axle 6 push together the upper free end of said checks. The supporting arm a projects through a circumferential slit 0 of the casing, and is guided upon the inner surface of'the casing by means of curved feet 03, the slit 0 being closed by a curved plate d, which connects the feet d. The pawl r Whichengages with the teeth of the ratchet Wheel 9 is fixed to the lower end of the supporting arm a and the arm and pawl 1- both pivot or pin 10. The electrolier j i mounted, for instance suspended, at the upper end of the arm a. If the arm a is lowered the'pawl r revolves the ratchet wheel 9 and its axle 1) between the leather disks m, pressed against said ratchet wheel, so that, if the arm a is released, it stops at any inclined position which it chances to occupy. The arm a moves the curved feet d, and the curved plate cl closes the slit 0 of the casing from the inside. If the arm a is'brought into an inclined position it is unnecessary to hold the casing s or the base plate 7. For raising the supporting arm a it is merely necessary to push it up which can be easily done as the pawl 1'' slides over the teeth of the ratchet wheel which does not revolve, said pawl'engaging again with the teeth of the ratchet wheel as soon as arm a i released.

I claim 1. An improved electric table lamp with brake-controlled adjustable supporting arm comprising, in combination a pivoted supporting arm carrying an electrolier a hollow lamp support in the form of an upright casing, a horizontal axle revolubly mounted in said support, a ratchet wheel keyed to said axle, an are shaped plate on said sup-- orting arm, friction means cooperating with the ratchet wheel, and guided in said support, and a pawl on the inner end of said supporting arm and operatively engaging with said ratchet whee 2. An improved electric table lamp of the type described comprising, in combination, a supporting arm, an elect-rolier fixed to the end of said supporting arm, a hollow lamp support in the shape of an upright box shaped casing, and having a circumferential slit for the reception of the lower end of said supporting arm, a ratchet wheelrevolubly mounted in said support, two

cheeks at the right and left of said ratchet wheel, leather disks upon the inner surfaces of said cheeks, means for pressing said cheeks against said ratchet wheel, a pawl fixed to the lower end of said supporting arm and engaging with said ratchet wheel,

and an arc-shaped cover plate fixed to the lower end of said supporting arm whereby to close the slit in said support.

In testimony whereof I aifiX my signature. in presence of two witnesses. T

' GEORG WEBER.

Witnesses: V V

BERNHARD REINER,

J OHN H. E. MOANDREWS.

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