US611162A

US611162A - worsley

Info

Publication number: US611162A
Authority: US
Publication date: 1898-09-20
Anticipated expiration: 1915-09-20

Description

No. 6ll,|62. Patented Sept. 20, I898. F. S. WORSLEY.

ELECTRIC ARC LAMP.

(Application filed Mar. 16, 1898.) .0 Model 2 Shouts-Sheet jig] \N\TNESSES- \NVENTOR fww/w' FREDERIC SWoRsLa MMM HIS HT 'ORNEY5 No. 6ll,|62. Patented Sept. 20, I898. F. S. WORSLEY.

v ELECTRIC ARC LAMP.

Application filed In. 15, 1898) (No Model.) 2 Sheeis-She'et 2.

WlTNEa'bES )NVENTOR i FREDERIOSWORSLEY h) jfi M HIG HTTORNEYS.

UNITED STATES PATENT OFFICE.

FREDERIO S. IVORSLEY, OF LONDON, ENGLAND, ASSIGNOR TO THE BRITISH BLAI'INIK ARC LIGHT COMPANY, LIMITED, OF SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 611,162, dated September 20, 1898.

Application filed March 1 5, 1898.

To all whom, it may concern.-

Be it known that I, FREDERIO STANHOPE IVoR-sLEY, electrical engineer, a subject of the Queen of Great Britain and Ireland, and

5 a resident of 119 Church Lane, Charlton, London, in the county of Kent, England, have invented new and useful Improvements in or Connected with Electric-Arc Lamps, (for which I have applied for a patent in Great Britain, No. 19,307, dated August 20, 1897,)

of which the following is a specification.

My invention relates to electric-arc lamps in which the feeding of the carbons is eifected by a diiferential system of coils, and particu- I larly to lamps which are used upon a circuit in series with other arc-lamps or other translating devices; and my said invention has for its object to provide a simple and efficient device for short-circuiting the lamp if from any cause the proper feeding of the carbons be interrupted to a dangerous extent. For this purpose I utilize the main coil of the lamp to maintain the said short-circuiting of the lamp by causing the core of the said main coil to effect the short-circuiting of the current across the carbons, so that the lamp is cutout. The following are convenient arrangements according to my invention, which I will describe with reference to the accompanying drawings, which show so much of two different forms of the lamp as is necessary to explain my invention.

I will presume in this description for the sake of brevity that the main coil is at the 3 5 positive terminal of the lamp; but it will be readily understood that the arrangement can also be applied to cases where the main coil is at the negative terminal.

In the arrangement shown in Figure 1 I provide on the frame A of the lamp and insulated from it and beneath the core I) of the main coil B a piece or block G of iron or other magnetizable material (hereinafter referred to as the block 0) which is electrically connected to a part of the circuit after the current leaves the main coil and before it reaches the carbon. The block 0 is shown as being secured to but insulated from the frame of the lamp. The main coil B is elec- 5o trically connected to the carbons by its end Serial No. 673,955. (No model.)

being pinched between the binding-screws e on a conducting-piece E, to which the lead to one of the carbons is connected. To prevent the core I) from coming into contact with the block O when the lamp is not in operation, I provide a spring g or its equivalent, which at one end bears upon the frame A and at the other end upon a projection on the core I). lVhen the conditions are such that the shuntcoil D has acted to a predetermined limit at which the lamp is to be cut out, the core I) of the main coil has been thereby caused to overcome the influence of the spring g and come into contact with the aforesaid block 0 and is magnetically held thereby,and as this block is electrically connected to a part of the circuit after the current has gone through the main coil B and before it reaches the carbons, and as the said core is then through the frame or mechanism of the lamp or otherwise in any suitable way in electric connection with the circuit beyond the carbons, the lamp is shortcircuited, the current then passing through the coil B, block 0, core I), and thence through the lamp-frame A.

In the second arrangement, as shown in Fig. 2, the short-circuiting of the lamp is effected by providing the cores 1) with a conducting connection F and spring contact-piece f, which makes contact with the top bindingscrew 6 at or immediately before the time the core 2') reaches the block 0, which in this case is not necessarily insulated from the frame A and is not connected electrically with the circuit except after the current has passed through the carbons, the short-oircuiting of the lamp being effected by the current being caused to pass through the said contact-pieces c and f, connection F, and core I), and out by the frame of the lamp. When the lamp is not in operation, the core I) of the main coil B is held out of contact with the block O by the spring g, which acts against the under side of the connection F.

I claim as my invention- 1. An electric-arc lamp provided with shortcircuiting devices comprising in combination with the main coil of the lamp and its core, a piece or block of magnetizable material with which said core is adapted to come into conbination with the main coil of the lamp and 15 its core, a piece or block of magnetizable material insulated from said frame, said core being adapted to come into contact With said block and short circuit the carbons when their proper feeding is interrupted, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERIO S. VVORSLEY.

Witnesses:

SAMUEL CRAUSAR, WILLIAM FREDERICK UPToN.