US260204A - Chables a - Google Patents

Description

(No Model.)

G. A. HUSSEY.

BLBGTMC ARG LAMP.

No. 260,204. Y Patented June 27, 1882.

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UNITED STATES PATENT OFFICE.

CHARLES A. HUSSEY, OF NEV YORK, N. Y., ASSPGNOR TO THE HUSSEY ELEOTRIOOOMFANY, OF SAME PLAGE.

ELECTRIC-'ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 26Q,204, dated. June 27, 1882.

Application filed August 31, 1881. (No model.)

i To all whom it may concern:

Be it known that l, CHARLES A. IlUssEY, of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric-Arc Lamps, of which the following is a specification.

My improvements consist in the combination, with the upper and lower carbons of an electric lamp, of an electro-magnet or solenoid and an armature or core for controlling the lower carbon, a train of wheel-work, a brakewheel, a brake, an electro-magnet or solenoid and an armature or core therefor, for controlling the upper carbon, a spring for retracting said brake, and means for varying the resilience of said spring, all arranged and operating substantially as hereinafter described.

The improvements also consist in certain novel means providing for adjusting one of two carhons comprised in an electric lamp into line with the other when desirable.

In the accompanying drawings, Figure l is a sectional elevation of an electric lamp einbodying my improvements, parts being broken away to economize space in said figure. Fig. 2 is a centra-l longitudinal section, taken in a plane at right angles to Fig. l, of a case containing a train ofwheels comprised in the lamp; and Fig. 3 is a central section, taken in a plane at right angles to Fig. l, of the upper part of a case, and appurtenances containing an electro-magnet, whereby the lower carbon is operated. v

Similar letters of reference designate corresponding parts in all the iigures.

A and B respectively designate the upper and lower carbons of the lamp. The upper carbon, A, is tted into a holder, A', and secured therein by a set-screw, A2. This holder is provided at the upper end with a laterallyextending ange, which tits against a similar iiange extending laterally irom a socket, A3. The socket A3 its on a rod, A4, and is re tained there by a set-screw, A5. The socket A3 may, by adjusting the set-screw A5, he turned around the rod A4 into and secured in different positions. The flanges of the said holder and socket are secured together vby a screw, A, passing freely through one and screwing into the other near the circumference. Hence by loosening this screw the holder may be so adjusted relatively to the socket as to shift the upper carbon more or less to one side. By these two adjustments the upper carbon may at any time be adjusted into line with the lower carbon.

The rod A4 is provided longitudinally with a toothed rack, and with this ruck engages a pinion, which is comprised in a train of wheels, O, including a brake-wheel, O', preferably much larger diametrically than the said pinion. The periphery of this brakewheel may be faced with india-rubher or analogous material, if desirable.

l) designates a brake consisting preferably of an arm of spring metal, which at one end impinges against the periphery ot' the brakewheel O. It is affixed to the upper end of the core E' of a solenoid, E, which, with the train of wheels O, is arranged in a metallic case, F, through whichl the rod A4 works. The rod A4 extends above this case. into a tuhe,F/, which is surmounted by a cross-piece, P, which is made of wood or other insulating material. The solenoid E is in the electric circuit of the lamp, and hence when thecarbons burn away, so as to effect an increase of the resistance in thc electric circuit, the solenoidE is weakened, and its core E is causedby a spring, E2, to rise and lessen the pressure of the brake upon the brake-wheel. Then the gravity of the upper carbon` and its apurtenances causes the said carbon to descend and reduce the resist ance in the electric circuit. Owin gto the train of wheels, the movement of the upper carbon in descending is rendered very slow. As soon as the said carbon descends sufficiently to shorten the voltaic arc between the carbons to its norm al length the solenoid draws in its core and applies thebrake to the brake-wheel, therea by retaining the upper carbon in position again. Owing to the very slow movement which the upper carbon has in descending, a very delicate feeding of the said carbon is provided for and an extremely steady light is maintained. The means here shown for rais ing the core of this solenoid when the solenoid becomes weakened consists of a spiral spring, E2, arranged within the solenoid below its core and impinging against ascrew, E3, which IOO works through the bottom of the case F. By manipulating this screwr the spring may be vcompressed or relaxed more or less to adapt the lamp for use with different electric currents.

The lower carbon, B, is Iitted into a holder, B', and secured there by a set-screw, B2. This holder is affixed to and entirely supported by a rod, B3, which is secured to the armature G of an electro-magnet, G. This electro-magnet and its armature are arranged in a metallic case, H; but the rod Biprotrudes through the top of the same. A spring, I, of steel or other suitable material, aiixed to thei top ot' the case and impinging against the under side of the armature, tends to hold it away from the electromagnet, and therefore raises it whenever the electro-magnet becomes suicientl y weakened or demagnetized.

The cases F and H are connected by tubes N, which may be made of metal, but must, in that case, be insulated from the said case-sas, for instance, by blocks b of insulating material.

J designates wires connected with a source of electricity and leading to metal tubes K, which extend from the cross-piece P to the case F, but are insulated from the latter by blocks ct of india-rubber or other suitable material.

lo the right-hand tube K is secured a wire, L, which leads to the solenoid E. Thence theV circuit extends to the case F, thence through rod A4 and carbon-holder A to the upper carbon, A. Thence the circuit extends to thelower carbon, thence through the case H to the electro-magnet G, and thence through a wire, M, to the left-hand tube K and wire J.

The lamp may be suspended by means of an eye, 0, aiiixed to the cross-piece P.'

When no electricity is passing through the lamp the lower carbon is raised and supported by the spring I, and the upper carbon rests upon it. As soon, however, as the electricity is supplied to the lamp, the solenoid E draws down its core E', thereby applying the brake D to the bralzewheel C' and retaining the upper carbon in position. Simultaneously the electro-magnet G draws down its armatureG', and with it the lower carbon, B, thereby forming the voltaic arc between the carbons. Whenever the carbons burn away, so as to materially `elongate the arc and increase the resistance in the circuit, the solenoid E allows its core E to eii'ect the release ot' the brake-wheel C', and the upper carbon ,thereupon slowly descends until the normal length of arc and of the resistance in the circuit are established, where-1 upon the upper carbon is again secured in position.

An ordinary electro-magnet and armature may bc employed in lieu of the solenoidE and `or a solenoid, the armature G or a core directly supporting the lower carbon,-B, the train of wheels (l and brake-WheelC for controlling the upper carbon, A, the solenoid E or'an electro-magnet, the core E or an armature, the brake D, vattached to and entirely supported by said core or armature, a spring acting upon said core E or armature to retract said brake, and means for varying the resilience of said spring, all arranged and operating substantially as herein l described. y I

2. In an electric lamp, the combination, with one of the carbons anda rod for sustaining it, of a holder, A', a` socket, A3,a setfscrew', A5, and a screw, A6, substantially as speciiled.

. C. A. HUSSEY.'

Witnesses; 'l. J. KEANE, Jas. R. BOWEN.

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