US1960503A - Ultra violet ray lamp - Google Patents

Description

May 29, 19345 M. PAR ISI ULTRA VIOLET RAY LAMP Filed Aug. 19, 1931 IN VEN TOI Z. M pm Patented May 29, 1934 ULTRA VIOLET RAY LAMP Michael Parisi, New York, N. Y., assignor to Isidor Goldberg, New York, N. Y.

Application August 19, 1931, Serial No. 558,028

6 Claims.

tus utilizes the mercury vapor enclosed in a quartz bulb, said bulb being either filled with an inert gas, or only exhausted of air to the highest degree. The principal object of this invention is to provide a practical and robustly constructed apparatus, capable of generating any large amount of such ultra violet rays and economically.

Another object of this invention is to simplify existing methods, and add new features for the constancy and perfect working of the are that 'I generates such rays. With these and other ob- 15 jects in view, which will be described fully in this description, and to render clearer the working of my invention, I have attached the following drawing, in which:

Figure 1 shows a front elevation of my invention.

Figure 2 shows a bottom View of my invention.

Figure 3 shows a plan view of the mercury seal element of my invention.

Figure 4 is a front elevation partly in section showing a detail of the mercury seal.

Figure 5 is a plan view of a support element applied in this invention.

Figure 6 is a front view of the structure shown in Fig. 5.

In Fig. 1 (1) is a quartz bulb, cylindrical in shape, and having a diameter approximately two inches, by five inches in length. In this bulb are placed two electrodes (5-6) consisting of wires of an alloy which does resist higher temperature, and is not subject to amalgamate with mercury vapor. These electrodes forming integral part of two coils (4) each possessing a certain resistance and selfinductance. Said coils are held together by two quartz slats (2-3) for the purpose of maintaining them straight, even when they are subjected to a high temperature. The terminal wires of the apparatus going through a mercury seal, will be connected to an Edison plug (11) At the bottom of bulb (1) there are two protuberances (7-8) wherein the electrodes (5-6) are in contact with metallic mercury. It is to be noted that the mercury pools (7-8) are separated one from another by an arched surface (9) so that there is no actual contact from the liquid of one pool with that of the other. Said pools have a diameter of approximately one-half inch, as indicated at the bottom view in Figure 2, the rest or" the bulb bottom (1) being flat. At the upper part of the bulb (1) there is diaphragm (10) made of quartz,

serving as support to a mercury seal for the terminals of the apparatus. 'Numeral (18) indicates a cylindrical extension of bulb (1) wherein are placed two small tubings welded upon diaphragm (10). Numeral (12) indicates one of the tubings. Each wire from the coils (4) goes through a tight orifice (16) and is broken off at (14). III-each tubing there are mica discs (13-15) and mericury (14) forming the seal. Fig. 3 shows in plan and Figure 4 shows in'elevation more constructional details for said mercury seal. The wires go through the orifices and a part of asbestos (9) is used for obstructing the inner side of the orifice. On the top of the asbestos is placed a mica disc (8) and some hard sealing wax (7). Then mercury is added (6) on the top of which are a few more mica discs ('5) and afterward more sealing wax (3)., Another plug.

quartz slats (2-3) Fig. 1, used to hold the wind: ings in an upright position. This is necessary as, these windings will become very hot, and would fall apart, impairing the proper working-of the apparatus. The function of these coils is for absorbing any voltage fluctuation in the supply circuit so affecting the mercury are which requires constant voltage for a steady running. Also these coils, being part of the circuit of the apparatus, they will become incandescent, and their heat imparted to the vapor of the are, helping to retard vapor condensation, and adding to the brilliancy and strength of the ultra violet rays so generated. At the upper part of the bulb at (18) there is provided space for attaching any suitable form of reflector, for the purpose of concentrating downward the rays of the apparatus. It should be understood that this type of apparatus is intended to work from a lighting socket, and on a circuit Figures 5 and 6 are a small detail of the two for direct current only. To start the apparatus it will be necessary to tip the bulb slightly on one side, momentarily, so that part of the mercury from one pool will make contact with that of the other pool, and establish an arc.

In so describing my invention, it should be una plurality of mercury pools, disposed in cavities at the base of said bulb, electrodes having their ends extending into the mercury pools, stabilizer coils disposed within said bulb and connected to the other ends of said electrodes, insulating discs disposed at the opposite ends of said coils, a diaphragm sealing the coils and electrodes and mercury pools within said bulb, mercury seals disposed in the head of said bulb, contact members disposed on the head of said bulb and havingconductors leading into the said mercury seals, and conductors forming the free end extremities of said coils leading into said mercury seals.

2. An apparatus for generating ultra violet rays, comprising a bulb, cavities at the'base of said bulb in which are disposed mercury pools, electrodes in said bulb having ends projecting into the mercury pools, stabilizer coils disposed in said bulb and connected respectively to said electrodes, a diaphragm for sealing the electrodes, stabilizer coilsandmercury within the substantially air free portion of said bulb, and a mercury seal for each of said electrodes disposed in the head of said bulb, contact terminals at the head of said bulb, conductors leading from the stabilizer coils into the respective mercury seals and conductors leadingfrom said mercury seals to said contact terminals.

.3. An apparatus for generating ultra violet rays, comprising a bulb, cavities at the base of said bulb in which are disposed mercury pools, elec-- trodes ,in said bulb projecting into the mercury pools, stabilizer coils disposed in said bulb and connected respectively to said electrodes, a diaphr-agmior sealing the electrodes, stabilizer coils and .mercury within the substantially air free portion of said bulb, and a mercury seal for each :of :said electrodes disposed in the head of said bulb, contact terminals at the head of said bulb, conductors leading from the stabilizer coils into therespectivemercury seals and conductors leadzmg tromssaid mercury seals to said contact terminalssaid mercury sealscomprising heat resistant/hollow :pillars sealed at their respective ends and having pools of mercury disposed centrally therein.

4.1m an apparatus for generating ultra violet rays, in combination with a bulb having cavities at the base thereof, mercury pools in said cavities, electrodes having their free ends disposed in the mercury pools, spaced coil windings formed integrally with said electrodes, said windings being adapted, upon establishment of an are within said bulb, to stabilize the voltage in said tube and upon incanclescence to develop heat effects sufficient to retard the condensation of the mercury volatiliz'ing within said bulb.

5. In an apparatus for generating ultra violet rays, in combination with a bulb having cavities at the base thereof, mercury pools carried in said cavities, electrodes having their free ends disposed in the mercury pools, spaced coil windings formed integrally with said electrodes, said windings being adapted upon establishment of an are within said bulb to stabilize the voltage in said tube and'upon incandescence to develop heat effects sufficient to retard the condensation of the mercury volatilizing within said bulb, a diaphragm separating the head from the body of said bulb, and mercury seals disposed in the head of said bulb, conductors leading from said stabilizer coils into said mercury seals, and conductors leading from said mercury seals to terminals on said head.

6. In an apparatus for generating ultra violet rays in combination with a bulb having cavities at the base thereof, mercury pools carried in said cavities, electrodes having their free ends disposed in the mercury pools, coil windings formed integrally with said electrodes and supported in spaced relationship in said bulb, said windings being adapted upon establishment of an arc within said'bulb to stabilize the voltage in said tube and upon incandescence to develop heat effects sufficient to retard the condensation of the mercury *volatilizing within said bulb, a diaphragm separating the head from the body of said bulb, and mercury seals disposed in the head of said bulb, conductors leading from said stabilizer coils into said mercury seals, and conductors leading from said mercury seals to terminals on said head, said mercury seals comprising hollow tubular heat resisting elements sealed at their respective ends and'carrying a pool of mercury therein, the said 120,: conductors leading into and out of said mercury seals having their end extremities spaced within said mercury pool.

MICHAEL PARISI.

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