US710356A - Circuit-breaker for electric-lamp glowers. - Google Patents

Description

- No. 710,356. Patented Sept. 30, m2.-

- F. m. GODDARD.

CIRCUIT BREAKER FOR ELECTRIC LAMP GLOWERS.

(Application filed an 20, 1899.)

(No Model.)

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UNITED STATES ATENT FFICE.

FREDERICK M. GODDARD, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO GEORGE WVESTINGHOUSE, OF PITTSBURG, PENNSYLVANIA.

CIRCUIT-BREAKER FOR ELECTRIC-LAMP GLOWERS.

SPECIFICATION forming part of Letters Patent No. 710,356, dated September 30, 1902. Application filed July 20, 1899- Serial No. 72 1, 153. (No model.)

T at whom it may concern: influence of heat. The ballast-conductor, Beitknown thatI,FREDERICKh/LGODDARD, therefore, is formed of some material the efa citizen of the United States of America, and fective opposition of which to the flow of cura resident of Pittsburg, in the county of Allerent will increase with increments of current 55 gheny and State of Pennsylvania, have inflowing to such an extent as to compensate vented certain new and useful Improvements for the decreasing resistance of the glower. in Circuit-Breakers for Electric-Lamp Glow- The strip 8 is joined by a conductor 17 to ers, of which the following is a specification. one terminal of a heating-conductor 18. The

In theart of electricalilluminationthrough opposite terminal of the said conductor is 60 [O the medium of glowers which require to bejoined to the conductor 15, and thus to the come heated before they conduct sufficient main 1 current to maintain incandesence it is some- The glower 14,the heater 1S,and the ballasttimes desirable to cheapen the manufacture conductor 12 will usually allbe united in asinof the lamps by dispensing with the autogle lighting device or lamp. 65 matic cut-out devices for the heater and sub- The normal position of the switch 4, when stituting therefor hand cut-outs, which are the lamp is out of the circuit, will be that in under the control of the operator who starts which it rests upon the insulating-piece 10. the lamps burning. I have devised such a IVhen it is desired to start the lamp into ophand-operated cut-out for this purpose, and eration, the said arm will be turned to the 70 I have embodied it in the form of a switch right, so as to bring it into contact with the requiring for its various positions that the strips 7 and S. The circuit will then be operating part shall always be moved in the formed through the heater 18, from the consame direction, as is common with electric ductor 2, over the conductor 3, arm 4, strip 8, switches. conductor 17, heater 18, and conductor 15 75 My invention is illustrated in the accompaback to the main 1. As soon as the heaterhas nying drawing, which represents the circuit raised the temperature of the glower 14 to a and apparatus merelyin diagram. sufficient degree, the glower-circuit will also In the drawing 1 and 2 are mains'leading carry current from the main 2, conductor 3, from a source of electric current. From the arm 4:, strip 7, conductor 11, ballast-conduc- 8o 0 main 2 a conductor 3 proceeds to the arm a tor 12, conductor 13, glower 14, and conducof my cut-out apparatus. This arm is pivtor 15 back to the main 1. oted upon a suitable base 5 of insulating ma- The third position of the switch is that terial. On this said base in such a position which the arm 4 occupies when it has been that the arm a will make contact therewith carried beyond the terminus of the strip 8 8 5 as it is moved to the right are metallic strips 7 and rests on the strip 7 alone. In this posiand 8, insulated from each other, as shown tion the heater is cut out of the circuit and at 9. The strip 7 extends beyond the strip 8, the glower-remainsin circuit. The operator and it abuts against insulating material 10, at the switch will allow the arm 4: to remain which is affixed to or formed in one piece upon both strips 7 and 8 until the increase of 5 with the base 5. The strip 7 is connected by light at the lamp shows him that the glower a conductor 11 to the terminal of a ballastis in operation. -I-Ie Willthen turn the switchconductor 12, beyond which a conductor 13 arm one step farther and cut out the heater, extends to the-terminal of the glower 1 1, the as above described. 'When the lampis to be opposite end of which is connected by a conput out again, the operator turns the switch 5 5 ductor 15 to the main 1. The ballast-conducto the right into contact with the insulatingtor 12 will usually be a length of iron wire inpiece 10, whereupon the lamp-circuit is comclosed in a sealed chamber 16, containing an pletely ruptured and the lamp goes out. inert gas. I have illustrated a single lighting device The function of the ballast-conductor is to or lamp controlled by ahand-switch. I may 10c prevent an undue flow of current as the reemploy such a switch to control a group of sistance of the glower decreases under the lighting devices or lamps with equal advantage. I have adopted this style of switch simply because this particular feature is already known in the art of incandescent lighting. Whether the switch-handle shall move in the same direction or reverse directions has no bearing upon my present invention, broadly considered.

I claim as my invention- 1. In an electric-lighting system, the combination with a supply-circuit, a series-connected glower and ballast device and a heater connected to one side of said supply-circuit, of a controlling-switch having a member connectedto the other side of the supply-circuit and a relatively movable member comprising a short contact-terminal connected to the heater and a long contact-terminal connected to the ballast device, whereby the movement of one of said members relatively to the other serves to connect the glower, ballast device and heater in circuit simultaneously and to contact-plates in the path of the said switch-,

arm, connected respectively to the opposite main through the glower and the heater circuits, the said contact-plate for the heatercircuit being shorter than the contact-plate for the glower-circuitl Signed by me, at New York city, New York, this 26th day of June, 1899.

FREDERICK M. GODDARD. Witnesses:

J. L. JONES, L. 0. CARUANA.

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