US256746A - Electric lamp - Google Patents

Description

(No Model.)

L. SEXAUER.

ELECTRIC LAMP. A No. 256,746. Patented Apr.18,1882.

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LOUIS SEXAUER, OF BROOKLYN, NEWT YORK.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent Application filed January 19, 1882.

To all whom tt may concern:

Be it known that I, LoUrs SEXAUER, acitizen ofthe United States,residingatBrooklyn, in the county of Kings and State ot' New York, haveA invented new and useful Improvements in Electric Lamps, of which the following is a specification.

rlhis invention relates to improvements in electric lamps, and has for its object to improve the devices employed for feeding the carbons.

The invention will be tirst described in dctail, andthe improvements afterward set forth in the claims.

In the accompanyingdrawings,Figure 1 represents a side view ot' my automatic feeder for the upper carbon. Fig. 2 is a front view of the same. Fig. 3 is a side view of my device for adjusting the lowercarbon. Fig. 4 isa plan or top view ofthe same.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the upper-carbon holder of an electriclamp. Said carbon-holder is provided atits lowerend with a socket to receive the carbon stick B, and its upper portion extends through between two roller-jaws, O D. The roller C is mounted on an arbor, a, which hasits bearing in thestandard E, and on which are also mountedabrakewheel, F, and a drum, G. The roller D is mounted on an arbor, b, which has its bearings in boxes c, fitted into slotted arms d and exposed to the action of springs e, so that by the action of these springs the carbon-holder is rmly clamped between the two roller-jaws C D, and if these rollers are not permitted to revolve the carbon-holder is sustained and prevented from sinking down. The brake-wheel F is made of iron, and with it is combined the governing electro-magnet I, the core H of which is concave at its upper end to correspond to the circumference ot' the brakewheel F.

The electro-magnet I is included in the circuit of the carbons, and if the carbons are at the proper distance apart the action of the electro-magnet on its core is such that by the attraction of said core the brake-wheel F is retained in position, and thereby the rollerjaws G D are prevented from revolving, thus retaining the carbon-holder A in position; but

No. 256,746, dated April 18, 1882,

(No model.)

as the cal-bons are consumed, or whenever, from some other cause, the force of the electric current through the helix of the electromagnet decreases, the attractive force ot' the core H is reduced andthe carbon-holder sinks down. As the points of the carbons approach the force ot' the electric current through the electro-magnet I is increased and the downward motion of the carbon-holder is stopped. The distance between the coreH andthe roller F must be properly regulated, and for this purpose the electro-magnet may be provided with suitable means-such as a set-screw-for moving it toward and from said roller. I

The roller O is provided in its circumference with a spiral groove,f, which is intended to receive a cord, g, one end of which is fastcned to the roller and the other end to the carbon-holder A. The object of this cord is to prevent the carbon-holder from slipping down when the roller-jaws are stationary, or from continuing its downward motion after the motion of the roller-jaws has been arrested.

The lower carbon, J, is secured in a holder, K, which is secured by set-screws h in the armature-lever L ot' an electro-magnet, M, Figs. 3 and 4. This electro-magnet is in the circuit of the carbons, and if the carbons are at the proper distance apart the attractive force ot' the electro-magnet is balanced by a spring, i, which acts on the lever L, and is so adjusted that it retains the armature N at a short distance from the ends of the cores of the electro-magnet, Fig. 3.

lf from some cause the upper carbon moves down so as to come in contact with the lower carbon, the force of the electric current on the electro-magnet M immediately increases, the armature N is attracted against the force of the spring t', and the lowercarbon is depressed to restore the proper distance between its point and that of the upper carbon. As the carbons are consumed the attractive force of the electro-magnetM is reduced and the arma ture-lever L recedes to its normal position. By these means the lower carbon is automaticallyretained in the proper position in relation to the upper carbon.

If the circuit through the lamp is broken, the upper carbon slides down, so as to comein contact with the lower carbon, and at the same IOC time the lever L, together with the lower carbon, is forced up by the spring z, carrying up the upper carbon a short distance. If the current through the lamp is restored, the armature L is attracted vagainst the force of the spring,` fi, the upper carbon is retained in position by the roller-clamps C D, and the lower carbon is moved down automatically vto the proper distance to restore the electric arc.

I am awarethat itis not broadlynew tocontrol the movement of the upper carbon in an electric lamp by means of rotary jaws and an electro-magnet or an electromotor; and l am also aware that itis not new to control the upper carbon by means of a vertically-movable brake-wheel connected with the carbon-holder and raised and lowered and held or released by au electro-magnet; but such features ot' themselves, or as4 broadly stated, do not constitute my invention.

I do not claim broadly in this application the combination of the roller-jaws anda brake operated by au electro-magnet for regulating the feed ot' the upper carbon, such being the subject-matter of a prior application for a patent tiled by me December 28, 1881.

What I claim as new, and desire to secure by Letters Patent, is

1. In an electrielamp, the combination, substantially as herein described, of asupportingstandard, two rotary jaws mounted on arbors arranged in said standard and serving,r to normally clamp and hold the upper carbon, and by their rotary movement permitting the carbon to descend, a cord attached tothe carbon holder and wound around one of the rotary carbon holding` and releasing;` jaws, a brakewheel secured to the arbor ot' the rotary jaw, around which said cord is wound, andan electro-magnet included in the circuit of the carbons, and having' a core arranged adjacent to the periphery ot' the brake-wheel, and by its attraction serving to retain the latterin afxed position, essentially as and for the purpose described.

2. In an electric lamp, the combination, with a lower carbon and an electro-magnet and armature for vertically adjusting the saine, of two rotary jaws mounted on arbors in a supporting-frame, and by their rotary movement permitting the upper carbon to descend, a brake-wheel arranged on the arbor of one of the rotary jaws, and an electromagnet ineluded in the circuit of the carbons and having a core arranged adjacent to the periphery ofthe brake-wheel, the current through which magnet causes its core to attract the brake-wheel and prevent the rotation of the carbon holding and releasingjaws, essentially as and for the purposes described.

3. In an electriclamp, the combination, with a vertically-adjuslable lower carbon, of two rotary jaws mounted on arbors in a supporting-frame, and serving to clamp and hold the upper carbon and by their rotary movement to permit the descent of the same, a cord connected at one end with the upper carbon and at its other end wound around one ot' the rotary jaws, an iron brake-wheel mounted on thc arbor of one ot' the rotaryjaws, and a stationary electro-magnetincluded in the circuit ot' the carbons and having a core arranged adjacent to the periphery of the brake-wheel, the current through said magnet causing its core to attract and hold the brake-wheel until the current decreases, when the latter will be released and the rotary jaws permitted to revolve and feed the carbon downward, essentially as set forth.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

LOUIS SEXAUER.

Witnesses:

W. HAUFF, E. F. KAs'rnNHUBnR.

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