March 24, 1925.

SKAUPY GLOWLAHP File'd De c. 11, 1922 v Inventor:

Franz Skaupy, y M His Attorney.

Patented Mar. 24, 1925.

' UNITED STATES M'riarrr oFF cE.

FRANZ SKAUPY, 0F BERLIN, GERMANY, ASSIGNOR TO GENERAL ELECTRIC COMPANY,

' A CORPORATION OF NEW YORK.

GLOWLAMP.

Application filed December 11, 1922. Serial No. 606,174..

To all whom it may concern.

Be itknown that I, FRANZ SKAUIY, a citizen of Austria, residing at Berlin, Germany, have invented certain new and useful Improvements in Glowlamps, of which the eral and among the objects of my invention are'the following:

To provide in a 'glow lamp electrodes which are separated from each other and hacked up by an insulating plate or which are separated from one another with. an.

interposed insulatingplate; to provide in such devices electrodes which are, in the shape of letters, numerals or any other suitable form so that they will stand out in contrast withthe insulating plate which may be opaque and of any suitable color; to provide a lamp of the above character which when viewed from one side shows one sign and which when viewed from the 0pposite side presents a different sign; to provide in said lamp means for mounting or fastening the insulation layer or plate directly to the electrodes or to a pedestal through which the lead-in wires pass into the lamp; to provide a lamp of the above character which is cheap to produce and rugged enough to withstand the usual jarring and which is adapted for general commercial use; and to provide other details of improvement tending to increase the eflic'iency and serviceability of a lamp of the above character.

To accomplish the foregoing and other useful ends, my invention comprises means hereinafter more fully set forth and claimed.

Referring to theaccompanying drawing,

Fig. 1 is a front view in elevation of the lamp; Fig. 2 shows the electrodes in side view and shows also how the electrodes and insulation layer are fastened to each other and to the pedestal in the lamp.

Referring more in detail to the drawing,

it will be seen that it is provided with the usual glass receptacle 1 filled with any suitable gas such as one of the rare gases. It is also provided with a'socket 2, a series resistance 3 and with a support 5 similar to that usually found in the incandescent lamp and through which the lead-in wires 4 pass into the lamp. It will be observed that the electrodes 7 are fastened to the flattened. terminal 6 of the pedestal 5 and that as shown in Fig. 1, each electrode is parallel with the insulating-plate 8 immediately behind it against which plate the electrode may rest. The insulation plate may be of any suitable material; mica or glass, for example, may be used and may be colored so as to render the same opaque if it is not naturally opaque. It will be seen that the insulating plates are attached to the elec- 1 tal in the lamp, in which case the electrodes may be directly fastened to the insulating plate instead of to thelead-in wires as may sometimes be done. It will be seen that inasmuch as the electrodes on one side are separated from the electrodes on the opposite side by the opaque medium, these electrodes need not be specially adjusted with respect to each other. Each, electrode can be turned towardthe observer in any suitable manner and the signs may be altogetherdiiferent.

What I claim as new and desire to secure by Letters Patent of the United States, is,,-

1. A glow lamp comprising a sealed envelope, an opaque plate within the envelope, and a sign on each side of the plate formed of a conducting material adapted when connected to a source of potential to glow and stand out in contrast to the plate as a background, said plate and electrodes secured to form a fiat compact unit structure.

2. A glow lamp comprising a sealed envelope, an opaque plate within the envelope,

and a sign on each side of the plate formed in which pass into the envelope one connectof a conducting material adapted when coned to one electrode, and the other connected nected to a source of potential to glow and to the other electrode, said structure secured 10 stand out in contrast to the plate as a backto and supported by said stem.

ground, saidplate and electrodes secured to In witness whereof, I have hereunto set, form a flat compact unit structure, a stem my hand this 21st day of November, 1922. in the envelope, a pair of wires sealed there- FRANZ SKAUPY.