US415067A - Ward woldemar schmidt - Google Patents

Description

(No Model.)V

J. 1". E. 11.5011111111. REGENERATIVB BURNER LAMP.

110.415,06?. Patented- Nov. 12,1889.

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UNITED STATES PATENT OEEIcE.

JOHANN FRANZ EDWARD VOLDEMAR SCHMIDT, OF DRESDEN, GERMANY.

REGENERATlvE-BURNER LAMP.

SPECIFICATION forming part of Letters Patent No. 415,067, dated Eil'ovember 12, 1889.

Application filed July 8, 1889. Serial No. 316,801. (No model.)

T0 @ZZ whom it may concern.-

Be it known that I, JOHANN FRANZ ED- WARD WOLDEMAR SCHMIDT, a subject of the Emperor -of Germany, residing at Dresden, in the Empire of Germany, have invented new and useful Improvements in Regenerative- Burner Lamps, of'which the following'is a specification.

The downwardly-radia-ting lamps of the Wenham type, comprising pendent burners arranged in globes, are unsatisfactory in that the room and ceiling above the lamp are not illuminated by the light, and to avoid the disagreeable impression arising from the darkness or gloom over the lamps the latter are necessarily arranged as near the ceiling as possible. This is objectionable, as it is difficult or inconvenient to reach the lamps, While the lights are placed at an undesirable and often unsuitable distance from persons reading, writing, and the like. These objections are avoided by providing the burnerglobe with a surrounding shade globe of translucent material having an air=inlet oritice in its bottom wall, whereby rays of light are dispersed toward the ceiling, and ascending air-currents' caused to pass between the two globes, as in my application for Letters Patent filed January 21, 1889, Serial No. 297,031, patented July 30, 1889, No. 408,197.

The object of my present invention'is to improve my prior construction and provide for an enlarged and more desirable illumination of the room and ceiling above the lamp, which I accomplish in the manner and by the means hereinafter described and claimed,

'reference being had to the accompanying drawings, in which- Figure 1 is a side elevation of a down.

The shade-globe 5 incloses the burner-globe, and is suspended from the lamp-frame by a retaining-ring 6, resting on the flange 2, and having hooked fingers 7, engaging a laterallyprojecting flange 8 at the top of the shadeglobe, the same as, or substantially the same as, in my application before alluded to.

The shade-globe is of a novel construction for enlarging the circle of light and more effectually dispersing the rays of light to increase the illumination of the ceiling. For these purposes and to produce the desired softening of the downwarally-radiating light I construct the shade-globe of transparent glass or other material, and cover, coat, or otherwise provide the outside of the lower half, or substantially the lower half, with a translucent substance or material-such as milk-glass or ground glass-as at 9, such substance or material extending continuously and annularly around the shade-globe from at or about the horizontal axis or line 10 of the latter to the edge 11 of`the unobstructed air-inlet orifice in the bottom wall of the shade globe. By this means the smooth transparent glass surface of the inside of the shade-globe below the axis or line 10 becomes a weak -reiector that causes the downwardly radiating rays -12 from the .flame to be reflected i'nto a greater number of rays, as at 13, 14E, and l5, which radiate upwardly and effectually illuminate the room above the lamp. The shade-globe curves laterally from the inner part of the top flange 8 in an outward direction considerably beyond the lamp-frame, such outward curve extending from the said iiange 8 to the axis or line 10, or, rather, to the upper edge ofthe coating or covering 9, of translucent material. From the axis or line 10 the globe uniformly curves around inwardly and upwardly toward the burner-globe, such curve terminating at the edge 11 of the air-inlet orifice and forming a concavity from 10 to 11. The rays cast from the flame upon the smooth concave mirror or reector are by the latter retracted into a greater number of rays to illuminate the room above the lamp, while some parts of the rays radiate downwardly to illuminate the room below the lamp, whereby I obtain an approximately equal illumination of all parts of the room within the circle of the light.

IOO

Having thus described my invention, what I elninl is-n 1. rlhe combination, with n lmnp-freine, n burner-globe, and :t pendent burner therein, of n suspended shade-globe of transparent material Curved from its upper edge portion toward the bnrne1-globeand hnving'the lower portion of its external snrlnoe provided with translucent material to form an internal wenk reflector that refrnets the downwin'dlynfndating raysfroln the l'lnlne into n greater number of rays to illuminate the rooni above the lmnp, substantially as described.

2. The combination, with n lmnp-frame, n lmrnenglobe, and a pendent burner therein, of n suspended shade-globe eolnlrrising e enrved transparent upper portion and n oonenvo-eonvex trnnslneent lower portion, forining nn internal weak reflector which relrnets the downwfn-dly-rmlnting rnys into n greater number of rays to illuminate the room above the lmnp, substantially as described.

The combination, with n lmnlVu-lj'rzune, :t pendent burner, and :t burner-globe having; nn unobstructed nininlet openingn in its bot toin wall, of n shade-globe curved laternlly outward beyond the lnnn)-'fron1e from its upper edge to or nenr ite horizontal axis and then curved :Lround linwardly and upwardly toward the burner-globe from its sold horizontal axis to the edge of the Said inlet-openingr, substantially as described.

In testimony whereof l have :Lllxed my signature in presence of two witnesses.

.l 0l] ANN 1l ll A NZ EDWARD WOLDEMA lt SCllll ll)'l. Witnesses:

IAUL DRUCKM LLER, EMIL Bonson.

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