US253328A - House - Google Patents

Description

(No Model.) 2 SheetS-Sheet 1.

A. G. WATERHOUSE.

ELECTRIC LAMP. v No. 253,328. Patented Feb. 7,1882.

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A. G. WATERHOUSE.

ELEGTRIG LAMP.

Patented Feb. 7,1882.

Fia:4 INVENTUHI UNITED STATES PATENT *OFFICE.

ADDISON Gr. VVATERHOUSE, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF SAME PLACE.

ELECTRIC LAMP.

SPECIFICATION forming part of Letters Patent No. 253,328, dated February '7, 1882.

Application tiled October 7, 1881.

To all whom it may concern:

Be it known that I, ADDISON G. WATER- HOUSE, a citizen of the United States, residing in New York, in the county and State of New York, have invented certain new and useful Improvements in ElectricLamps, of which the following is a specification, reference being had to the drawings accompanying and forming a part thereof.

My invention relates to are lamps, and is directed mainly to the attainment of a delicate and accurate action of the electromagnets used in conjunction with the feed controlling or regulating mechanism. For this purpose I arrange the movable portions of the magnet or magnets in such manner that the weight for any given size of magnets sustained by magnetic attraction while the lamp is in operation is reduced to a minimum and a greater range of motion secured without sensible diminution of attractive power than is possible with any of the forms of lamps heretofore in use.

In the accompanying drawings, illustrative of the manner in which my invention is or may be carried into effect, Figurel is an interior side view of the upper portion of the lamp; Fig. 2, a top view of the same; Fig. 3, a detached portion of the feed mechanism; and. Fig. 4, an-

0 other view of the same, with the addition of a portion of the clamping-lever.

Similar letters of reference indicate corresponding parts in all the figures.

H designates the usual metallic frame-work 5 of an electric-lamp regulator, and J the cap or cover forcontaining the feed-controlling mechanism. Secured to the upper portion of the frame, by means of clamps or screws which pass into extensions from insulatingend pieces or plates, are two electromagnetic helices or coils, A A. Coil A is composed of insulated wire ofcoi nparatively large diameter, and is arranged in the main circuit of the lamp-that is to say, the circuit which includes the carnon electrodes. Coil A is composed of fine insulated wire wound in the same direction as the coarse wire, but being of considerably greater length it offers a high resistance to the passage ofthe current. It forms part of a shunt or derived circuit about the lamp. Helix A (No model.)

contains a fixed soft-iron core having right-angled polar extensions E, reaching as far as or slightly beyond the edges of the end pieces or plates, as shown. Attached to or forming part of the end plates of helix A are two standards 5 or arms, (lettered respectively B B by means of which a cylindrical core with right-angled polar extensions E, corresponding to those of magnet A, is held by pivoting-screws D D, which provide for a rotation of the said core about a central axis.

I is a carbon-holding rod or tube passing between the helices or electro-magnets A A, and arranged to enter a tube composed of sections a and h, and secured to the frame 11 by nut K.

N is a. clamping device, a plan of which is shown in Fig. 4, consisting of a plate or bar having a circular opening of such diameter that it may gripe the carbon-carrier I when tilted, but allow the same to slip through it when allowed to assume a horizontal position.

F is a bar, to which the end of clampingleverN is hinged. It is itself hung by rigid or pivoted arms F to the extensions E' of the movable core aforesaid, so that as the latter is raised the clamping-lever is tilted and caused to bind and raise the carbon-holder I.

G is a dash-pot, connected by an arm, L, with the movable core or one of its extensions E, its function being to preclude sudden movement or i erking of the moving parts.

The operation of the above-described lamp will be readily comprehended from the fact that it is similar in principle to that of others now in use-that is to say, the extensions E are raised toward the extensions E when the distance of the carbons apart is not sufficient to divert any considerable portion of the current through the coil of electro-magnet A. The lever N is in consequence tilted and caused to bind the carbon-holder I, maintaining it in an elevated position. As the carbons are consumed, however, the relative attraction of the two magnets A A varies, until, by the energizing eifect of the current in the coils of mag- 5 net A, the core of the same is magnetized sufficiently to neutralize the attractive force existing in the polar extensions E E. These latter thereupon recetle or fall until the position of the clamp allows the red I to feed, I03

when the original condition of attraction and relative distribution of current in the two magnets is re-established.

The lamp above described, while embodying the features essential to the attainment of the results described, may within certain limits be considerably varied in the matter of the mechanical construction and arrangement of its several component parts. Such variations consist mainly in having the main magnet stationary and the shunt-magnet movable, or, it" so desired, in winding the coil of the movable magnet directly upon the core, so that both shall move together. As a still further varia tion of the forms described, I may wind both coils upon the same corc-either the stationary or movable core-and utilize the other core simply as an armature. In such case it is evident that the winding of the two coils must be in opposite directions, or thatthe currents viz., that in the main and that in the shunt must be caused to pass the coils in such manner as to exert a contrary magnetic effect upon the common core. In all cases, however, the parts which ordinarily add to the weight which has to be lifted by the force of magnetic attraction is reduced to a minimum, while the strongest magnetic ett'ects are obtained from the use of only two coils. The inertia of the moving parts being in this manner greatly reduced, variations in magnetic attraction will be much more accurately responded to, and magnets of greatly-increased sustaining power may be employed without affecting the delicacy of action. The additional advantage incident to swinging magnets of an increased range of motion is in this form of magnet fully realized.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electriclamp, the combination,with the feed-controlling mechanism, of a fixed and pivoted electro-magnct, each containing a single core, with pole-pieces extending at right angles therefrom, one of said magnets being included in the main or lamp circuit, and the other in a shunt or derived circuit, substantially as and for the purpose set forth.

2. In an electric lamp, the combination of a fixed electro-niagnet, composed of a helix and core, with right-angled polar extensions, with a similarly-constructed electro-magnet connected with the feed-controlling mechanism and pivoted in such a manner that its polar extensions may swing in face of those of the said fixed magnet, one of said magnets being included in the lamp-circuit, the other in a shunt or derived circuit about the lamp, as set forth.

3. The coinbination,in an electric lamp, with the feed-controlling mechanism, of a fixed electro-magnet composed of a single helix, and a corehaving right-angled polar extensions, and an electro-magnet composed of a stationary helix and a core capable of rotation therein, and provided with right-angled polar extensions, one of said magnets being included in the main or lamp circuit, the other in a shunt about the lamp, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand this 20th day of September, 1881.

ADDISOh G. WATERIIOUSE.

Witnesses:

PARKER W. PAGE, W. FRISBY.

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