US1630090A - Electric-lamp outfit - Google Patents

Description

May 1927 R. D. MAILEY ELECTRIC LAMP OUTFIT Filed July 20. 1922 H/SATTORA/EY Patented May 24, 1927.

UNITED STATES PATENT OFFICE.

ROY D. MAILEY, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO COOPER EEWTTT ELEC- TRIO COMPANY, OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ELECTRIC-LAMP OUTFIT.

Application filed July 20, 1922. Serial No. 576,256.

.. The present invention relates to electric light radiating outfits useful in the arts generally and particularly in the therapeutic art where diseases are treated by radiations from a light source giving ofi ultra violet rays. The object of the presentinvention is to provide a simple form of light source such, for instance, as a lamp 'burner comprising a uartz container, a solid anode and a liqui cathode, and cooling devices for the lam so arranged that the control of heat trans er' from the burner is had at either the positive electrode or the negative electrode, and preferably at the negative electrode'whereby stableoperation of the lamp is secured over wide voltage ranges, making it possible for practitioners in the therapeutic art, for example, to obtain and use radiations from such outfits where the volts per inch of arc column are low or are high, within the limits of the lamp or are at an intermediate value, as desired for the particular case in hand.'

By virtue of the present invention, it is 2 possible to supply to the trade a minimum number of types of lamp, say one or two, which will fill the demands of the trade and permit the operator to work his lamps at a volts per inch which experience shows is the best for the purpose in hand, and also permits him to readily adjust the lamp to a different volt ampere characteristic w ich he wishes to use for another purpose.

By way of illustration I have shown in the accompanying drawings a lamp outfit of the artificially cooled type in which Figure 1 is a vertical section of such an outfit showing means, such as an adjustable sleeve, at the negative electrode for continuously varying the amount of heat transfer from the burner to the cooling circulating medium; and Figure 2 is a plan view on the line 2-2 of Figure 1 showing a bifurcated cushioning spring for supporting or aiding in support of the lamp tube in the outfit.

In the drawings, 1 is a mercury vapor lamp having a solid anode, 2, of tungsten or other suitable material and a negative electrode, 3, of mercury. The usual lead-in devices for the electrodes are shown at 4 and 5, respectively. As the lamp is usually started into operation by tilting, the lead wire, 5, is formed into a flat spiral as shown at 6, the rim of the spiral extending into close proximity with the walls of the tube 1,

' tion, 8, which serves to hold the are at this point on the electrode and prevent the wandering of the are spot over the surface thereof.

The lamp, 1, is mounted in a housing, 9,

having a removable top cap, 10, and a removable bottom, 11. Cooling chambers, 12 and 13, surround the lamp, 1, inside the jacket, 9, the inner walls of the jacket, 12, extending into contact with or into close proximity to the wall of the lamp in the neighborhood of the anode 2, and the extension or lower portion 13 being in close proximity to the wall of the lamp in the neighborhood of the electrode 3; Interposed between the outer wall in the neighborhood of the'electrode, 3, and the inner wall of the cooling portion, 13, is a sleeve, 14, screw threaded, if desired, which is adjustable along the length of the portion, 13, forcontrolling the transfer of heat from the-electrode, 3, to the chamber, 13. The sleeve, 14,

may be of good heat transferring material such as iron, or may be of poor heat translatmg material such as bakelite, and by screwing the said sleeve inwardly or outwardly, the rate of heat transfer ma 'be adjusted to the pointdesired, as wi be understood. Inlet andoutlet pipes for the cooling medium which may be air, water or other suitable medium are shown at 15 and 16 respectively, the inlet pipe, in this. instance, being brought down to the portion, 13, of the cooling chambers. Quartz lenses, 17 and 18, are mounted in the walls of the lamp -by means of a screw-threaded retaining housing therefor indicated at 19, a passageway, 20, being provided in the housing for circulation of the cooling medium between the plates from the portion, 13, to the portion, 12, of the. cooling chambers. Suitable leading-in conductor devices for connecting the lamp across the terminals of a suitable sourceaof electric current are indicated at 21 and 22, and insulated from the container walls as indicated at 23. The conductor 21 is provided with a flexible conducting member 24 clamped thereto as shown at 25 the other end of the member wired on the container 1 as shown at 32,

and the lead wire 5 being joined to the strip 31 as indicated at 33. The member 29 may be a flexible lead wire or it may be of rigid material capable of supporting the lamp 1 in position in the housing 9. If desired, a spring cushion member 34 may be mounted on the bottom piece, 11, and clamped as shown at 35 to an insulating plate 36 resting on the removable bottom. The spring 34 is preferably bifurcated, and the spaced members thereof are in contact with the bottom of the lamp 1 on either side of the conductor 29 and the strip 31.

In assembling the parts, the lamp 1, is inserted through the bottom of the jacket, 9, until the top of the lamp comes in contact with clips 37-37 at the top of extension 12 of the cooling jacket, whereupon the members 2429 are clamped to the conductors 21 and 22, as indicated at 25 and 30. Thereafter, the cover, 10, and the bottom, 11, are put into place and the apparatus is ready for operation.

In the operation of the device, the circulating medium is started and flows from inlet, 15, down into the portion, 13, of the cooling jacket around the lamp, through the channel, 20, between the lenses 17 and 18, into the portion 12 of the cooling jacket and hence around the lamp to the outlet 16, to the cooling source. The lamp is now started into operation by tilting the outfit so that the mercury of the electrode 3 makes and breaks contact with the electrode 2, whereupon an arc is formed between the electrodes 2 and 3, as is now well understood in the art. At the instant of starting because of the low temperature in the lamp, the voltage drop across it is low and the circuit is controlled principally by the stabilizing resistance in the auxiliary devices usual to such lamps. The initial current is necessarily high and the temperature of the mercury electrode 3 rises rapidly, raising the vapor pressure of the mercury in the lam which raises the arc voltage. This buil ing up process continues until such time as the temperature in the lamp establishes uilibrium withthe cooling members. T is equilibrium temperature for given energy input is determined by the relative areas of the portions12 and 13 and the electrode porextensions thereof an tions of the lamp that are in close proximity. It is thus obvious that the volt ampere characteristic is controlled by the temperature equilibrium at the point of greatest heat transfer. It follows from the foregoing, then, that the operation of the outfit for any given set of conditions may be controlled and varied by varying the cooling effect of the circulating medium or through varying the electrical regulating devices in the auxiliary mechanism of the lamp but principally through varying the ease of heat trans fer from the wall of the lamp in the neighborhood of one of the electrodes to the cooling chamber since the latter is the most sensitive it is preferred and for any given setting of the lamp and its control mechanism we vary the volt ampere characteristic of the lamp by varying the rate of heat transfer at the negative electrode.

The radiations from the lamp, 1, to be utilized either in therapy or in general illumination pass through the lenses, 17 and '18, with the water between them which serves to cool the lenses and to take out the radiant energy which the cooling medium may absorb, although it will be understood that the heat rays may also be utilized for useful purposes in which case the cooling medium must be selected that is transparent to the said rays. This latter, of course, is a matter of design and selection well within the knowledge of those skilled in the art.

While I have illustrated and described my invention in connection with a water cooled outfit, it is to be understood that it applies equally well for the larger sizes of quartz lamps now on the market and is adapted to use in connection with lamps having liquid electrodes or a solid electrode and a liquid electrode or with lamps having only solid electrodes, and is applicable to lamps of the air cooled type shown and described in the patents issued on inventions of William A. D. Evans, 1,303,273-274, dated May 13th, 1919, and particularly to the control of lamps in the air cooled outfits where the cooling portion, 13, and control valves such as valve 40 in pipe 15 in the inlet or the outlet pipes 15 and 16 for said chamber and the adjustable sleeve, 14, are applied only to the anode wall or the cathode wall of an .air cooled lamp for controlling the volt ampere characteristic of such a lamp generally and particularly in a therapeutic outfit.

I claim as my invention:

1. A lamp outfit comprising a jacket, a lamp in said jacket, extensions of said jacket in proximity to the terminal portions of sa1d lamp, means for circulating a coolin medium through the jacket and the means in said circulating means for varying the rate of flow of said cooling medium.

2. A lamp outfit comprising a jacket, a

lamp in said jacket, portions of said jacket being in proxlmity to the terminal portions of said lamp, and means for circulating a cooling medium through said jacket.

3. A lamp outfit comprising a jacket, a lamp in said jacket, and in operative relation to said jacket, and means for circulating a cooling medium through said jacket to control the volt ampere characteristic of said lamp.

4. A lamp outfit comprising a jacket, a lamp in said jacket, and in operative relation to said jacket, and means forcirculating a cooling medium through said jacket to control the volt ampere characteristic of said lamp and means in said circulating in said casing in operative relation to said l-mp, means for circulating a cooling medium through the Water jacket and means in said circulating means for varying the rate of flow of said cooling medium for varying the operating characteristics of the lamp by varying the-rate of heat transfer from the lamp.

Signed at Hoboken in the countyof Hudson and State of New Jersey this 19th day of July, A. D. 1922.

ROY D. MAILEY.

Images