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Publication numberUS156920 A
Publication typeGrant
Publication dateNov 17, 1874
Filing dateDec 29, 1873
Publication numberUS 156920 A, US 156920A, US-A-156920, US156920 A, US156920A
InventorsChables J. B. Gaume
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in electro-magnetic motors
US 156920 A
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Description  (OCR text may contain errors)

0.1. B. GA UME.

Electra-Magnetic Motors.

Patented Nov. 17,1874.





Specification forming part of Letters Patent No. 156,920, dated November 17, 1874: application filed December 29, 1873.

To all whom it may concern:

Be it known that I, CHARLES J. B. GAUME, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Electro-Magnetic Engine, of which the following is a specification:

Figure l is a side view of my improved engine, parts being broken away to show the construction. Fig. 2 is a longitudinal section of one of the armatures, taken through the line 00 00, Fig. 1, and shown in connection with its magnet.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved electro-magnetic engine for driving sewing-machines and other light machinery, which shall be so constructed that the mag nets and armatures may be in contact with each other long enough for the magnets to exert their full power.

The invention will first be fully described, and then pointed out in the claim.

A represents the frame-work of the engine, in bearings in the upper part of which revolves the shaft B, to the middle part of which is attached the wheel 0, to the rim of which the armatures D are secured. To one end of the shaft B is attached a pulley, E, from which motion is taken to the machinery to be driven. To the lower part of the frame A are attached the magnets F, from each of which a wire, f leads to a clamp, G, with which a wire leading to the battery is connected. The other wire leading to the batteryis connected with a clamp, H, attached to the frame A, which frameA thus forms part of the circuit. From each of the magnets F a wire, f leads to a bolt, I, secured to an arched bar or plate, J, attached to or formed upon the top of the frame A. The bolts I, as many of which are used as there are magnets, are secured by nuts in slots formed in the bar or plate J, and curved upon the are of a circle having its center in the axis of the shaft B, so that the bolts I can be readily adjusted as required. To the inner end of each of the bolts 1 is attached one end of a curved spring, K, to the other end of which is pivoted a wheel,

L, which revolves upon the surface of the wheel M, attached to the shaft B. The body of the wheel M is formed of wood or other suitable non-conducting material, and its face is covered with transverse strips of metal N, made alternately narrower and wider, and the adjacent edges of which are insulated from each other by narrow strips of pasteboard, or other suitable non-conducting material. The narrow strips N are connected with the shaft B by metallic pins, screws, or wires 0, so that when one of the wheels Lpasses upon the narrow strips N the circuit will be closed, and when the said wheels pass upon the wider strips N the circuit will be broken. The wheel L, strips N, armatures D, and magnets F are so arranged that the circuit will be closrd as each armature passes upon each magnet, and will be broken as it passes from said mag net. The armatures D are made in the form of a double U, the Us being connected with each other by a center bar or plate, by which the armatures are secured to the rim of the wheel 0 so as to overlap the sides of the ends of the magnets, as shown in Figsl and 2, which ends are also rounded off, as is also shown in Figs. 1 and 2.

By this construction of the armatures D and the ends of the magnets F the armatures will be kept in contact with magnets long enough for the magnets to exert their full power between the closing and opening of the circuit, even when the armature-wheel G is revolving rapidly.

This invention is an improvement of my patented machine, in which the polar extremities of the magnets were tangential to the face of the revolving wheel'carrying the armatures. In that the faces were plain tangents, and the faces alone were used to attract the armatures. The object in this is to give a greater extent of polar surface, and, in addition, to utilize an amount of magnetic force not found in the faces themselves. For this purpose the tangential ends are rounded, the line of curvature being at right angles to the tangential line, and the armatures made of U shape, the bowl or bottom of the U corresponding to the rounded face of the pole, while the extended.

sides of the U embrace, to a greater or less extent, an exposed side portion of the poles, and thus utilize that force which is exerted by the sides of the poles.

1 am aware that V- shaped magnets and armatures have been used. In such, however it is expressly provided that the two shall always coincide, so that all the force used shall be in direct radiating lines to the axis of the core, while in my arrangement I utilize that radiation at or near the poles in all directions.

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

In an electro-motor, the combination of the magnets having the rounded and tangential polar extremities and the douhle-U-shaped armatures, substantially as set forth.

CHARLES J; B. GAUME. lVitnesses:


Cooperative ClassificationH02K25/00