US375560A - Electric motor - Google Patents

Description

(No lllodel.) I

' J. F. MCLAUGHLIN.

ELECTRIC MOTOR.

No. 375,560. Patented Dec. 27, 1887.

PETERS, Phuto-Ulhcgnphor. Wnhingloo. a, e

UNITED STATES PATENT OFFICE.

JAMES F. MOLAUGHLIN, OF PHILADELPHIA, PENNSYLVANIA.

' ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 375,560, dated December 27, 1887. Application filed December 16, 1886. Serial No. 221,765. (No model.)

To all whom it may concern:

Be it known that I, JAMES F. MOLAUGHLIN, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Electric Motors, of which the following is a specification.

My invention consists of certain improvements in the construction of electric motors, as fully described hereinafter.

In the accompanying drawings Figure 1 is a side View of my improved motor. Fig. 2 is a vertical section on the line 1 2, Fig. 1. Fig. 3 is a vertical section on the line 3 4., Fig. 1; and Fig. 4 is a diagram of the circuits.

My improved motor is of that construction in which armatures revolve between fixed fieldmagnets which are'on opposite sides of the armatures. I

The frame of the machine consists in the present instance of a base-plate, a, and end standards, a, which are provided with bearings for the longitudinal shaftor axis A, carrying the armatures and coinmutators. To these standards a are secured the electro magnets E E, constituting the field-magnets.

Each field-magnet consists of two coils, e,

having their cores united by the standard a,

orby a suitable plate'of. magnetic metal, so that each field-magnet consists of a horseshoe. The horseshoe fieldanagnet E is arranged in a plane at right angles to the horseshoe fieldmagnet E, as shown in Fig. 1. I prefer to provide thefield-magnets E E with extended pole-pieces e, carried on a radius from the axis of the armature-shaft.

Each armature consists of a pair of electromagnets, FF", secured to a cruciform metal plate, f, mdunted onthe aXis'A. This plate is of magnetic metal, so that it will form the connecting-plate for the two coils of each magnet to form a horseshoe-magnet corresponding with the horseshoe field-magnets. magnets are secured on opposite sides of the same plate f, and in planes at right angles to The two each other, in order toobtain a better me- 5 chanical balance, as well as a more convenient arrangement of parts. The poles of the armatures are provided with extended polepieces f, similar to those on the field-magnets.

The armature-shaft carries two commutators, G, of any convenient construction. In the present instance each commutator consists of a pair of insulated plates connected to the coils of the corresponding armature. On the periphery of each commutator bear spring commutator-brushes b.

The circuits will be clearly understood on reference to Fig. 4, from which it will be seen that the coils of the field-magnets and armatures are in series. Beginning at the bindingpost p, the circuit is through the coils of the fieldmagnets E, thence to one of the commutator-brushes and armature-coils, and from the second commutator-brush to the coils of the field-magnets E on the other side of the machine. Thecircuit,asl$efore,isthencethrough 'the commutator, armature-coils, and commuvolving between two field-magnets, the fieldmagnets being horseshoe-magnets in planes at right angles to each other, and the armatures being also horseshoe-magnets in planes at right angles to each other.

2. The combination of the field-magnets E and E with intermediate revolving armatures consisting of electro-magnets carried by a central cruciform plate, the pairs of electro-magnets being on opposite sides of the plate and in planes at right angles to each other.

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

JAMES F. MOLAUGHLIN.

Witnesses:

WILLIAM D. OoNNEa, HARRY SMITH.

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