US672451A - Electric-light vacuum-tube. - Google Patents

Description

No, 672,45l. Patented Apr. 23, ml. D.-McF. MOORE.

ELECTRIC LIGHT VACUUM TUBE.

(Application filed Mar. 26, 1898.)

(No Model.)

ifiz'zizesses: [72 v6]? for 6 @c/c'h v5 Daniel [[92 Home A zzomey TA: "cams PETERS c0. PHOYO-LITHO.. wumucwou, o. m

U ITED STATES Aer n.

DANIEL MOFARLAN MOORE, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE MOORE ELECTRICAL COMPANY, OF NEW YORK, N. Y.

ELECTRlC-LlGHT VACUUM-TUBE.

SPECIFICATION forming part of Letters Patent No. 672,451, dated April 23, 1901.

Application filed March 26, 1898. Serial No. 676,205. (No model.)

To all whom it may concern: The most satisfactory way of adding ter- Be it known that I, DANIEL MOFARLAN minals to the tubes is by electroplating, and MOORE, a citizen of the United States, and a the best mode of effecting this is by first roughresident of Newark, in the county of Essex ening the parts of the tube where the termi- 5 and State of New Jersey, have invented a cernals are to be placed and then mechanically tain new and useful Electric-Light Vacuumfixing thereto some conducting material, as Tube, of which thefollowingisaspecification. by dipping the tubes into a bath of nitrate of 5 This invention relates to the construction silver orlike substance, after which they may i of vacuum-tubes or other devices to be used be submitted to the plating-bath. r IO as lamps or sources of light when excited by The places on the tubes for the electrodes 'l electric vibrations, oscillations, or disturbmay be roughened in any suitable way--as ances generated in any desired way-as, for by treating with an acid, such as hydrofluoric fl instance, by interruptions of a circuit of inacidbut the best results have been produced duction' produced in anydesired manneras, by mechanically roughening the parts to re p,

I 5 for instance, by the means described in my ceive the terminals, as by means of the emo Patent No. 548,127. ery-wheel or sand-blast. This mode of roughn In the manufacture of vacuum light-tubes ening has the efiect of producing sharp-edged considerable difficulty is experienced in conpits, grooves, ridges, and projections, which structing and mounting terminals or elecgive the electrodeposited terminal a more in- 20 trodes thereon in such a manner as to protimate contact with the substance of the tube duce the best luminous effects and to prevent than has yet been effected in any other way. a certain crackling, spitting, or hissing noise Vacuum light-tubes provided with electrowhile the current is passing through the tube. deposited terminals will be silent, and aside The object of this invention is the eliminafrom this they have other advantages over 25 tion of these difficulties; and to that end the terminals consisting of tin -foil or metallic invention consists in the construction here paint which have heretofore been used in inafter fully described, and set forth in the that they may be made of greater thickness, claim. so that they will not be easily scraped off In the accompanying drawings, which form or torn, and the circuit-conductors may be 30 a part of this specification, Figure 1 reprereadily soldered theretoinstead of having to sents a vacuum light-tube as it comes from be simply wrapped around them. It is prefthe air-pump. Fig. Zrepresentsitwith rougherable, however, to make these terminals as ened ends. Fig. 3 shows the finished tube thin as possible to preventreverberation,and ready for insertion in a circuit; and Fig. 4 when too thin for soldering conductors there- 35 represents a tube in the form of a letter, as to a band of metal may be wrapped about in Patent No. 602,953, granted April 26, 1898. them and the conductor soldered thereto, as

A represents the vacuum-tube, which may indicated at D, Fig. 3. be made from any suitable kind of transpan. The electroplating process is especially out or translucent material, but preferably adapted to the application of terminals to 40 from glass. vacuum-tube letters or other characters, be-

B represents the terminals orelectrodes, cause of the more or less conical or spherical and 0 suitable conductors connected to the shape of the projections to which the termio terminals. These conductors may be the nals must be applied, (see B, Fig. 4.) It is ends of the circuit in which the lamp is 10- by these laterally-projecting terminals that 5 cated, or they may be short pieces of wire the tubular letters or characters are held in soldered or otherwise secured to the termiplace, as well as supplied with current, as nals and by means of which the tube maybe fully set forth in the latter patent above reconnected into the circuit. ferred to. I

What I claim as my invention is Signed at New York, in the coiinty of fievi As an article of manufacture, a vacuum- York and State of New York, this 11th day tube lamp consisting of an exhausted herof March, A. D. 1898.

metically-sealed tube of glass or like mate- DANIEL MOFARLAN MOORE. 5 rial devoid of interior electrodes and having Witnesses:

its extremities roughened and electroplated WM. H. OAPEL,

with a conducting material. C. L. BELOHER.

Images