US403905A

US403905A - Harry it

Info

Publication number: US403905A
Authority: US
Publication date: 1889-05-28
Anticipated expiration: 1906-05-28

Description

(No Model.)

H. H. BLADES. GOMMUTATOR.

Patented May 28, 1889.

UVVEJVTO? WITNESSES n. wcrzn. MW

UNITED STATES PATENT OFFICE.

HARRY H. BLADES, OF DETROIT, MICHIGAN, ASSIGNOR TO THE DETROIT MOTOR COMPANY, OF SAME PLACE.

COMMUTATOR.

SPECIFICATION forming part of Letters Patent No. 403,905, dated May 28, 1889.

Application filed September 25, 1888. Serial No. 286,358. (No model.)

To all whom, it may concern:

Be it known that I, HARRY II. BLADES, a citizen of the United States, residing at Detroit, county of lVaync, State of Michigan, have invented a certain new and useful Improvement in Commutators; andl declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

In the drawings, Figure 1 is a perspective view of a commutator embodying my invention. Fig. 2 is a sectional view on the line x at; Fig. 3, a sectional view 011 the line 111 and Fig. 4 a longitudinal sectional view.

This invention has for its object to produce a commutator for electrical machines which is in its nature an improvement upon the device patented in Letters Patent No. 389,184, of September 4, 1888. In the patent referred to the commutator-segments consist of wire, each of which has a longitudinal fin engaging a corresponding crease or groove in the orifice, through which it is passed to prevent it from turning upon its own axis. By my invention, however, the construction is such that the employment of the tin and grooves is obviated. The insulator-segments are held in place by a common insulating-ring, and the insulating-ring is dressed fiush with the face of the commutator segments, so that the brushes may be caused to wear to the extreme edge of the commutator-segments without scoring a groove in them, such as would impair the properadj ustment of other brushes.

In carrying out my invention, A represents the shaft of an electric generator or motor.

B is the commutator-head, to which the commutator-segments O are attached. The

commutator-head B is of hard rubber, vitreous fiber, or other insulating material, bored 1011- gitudinally for the insertion of the segments 0, which are simply cylindrical rods or wires adapted to fit the said bores.

D is a ring or collar of insulating material, fitted over the end of the commutator-head and the corresponding ends of the segments 0, the said head and segments being rabbeted for the reception of the ring or collar. The said connnutator-head is then turned down in a lathe, so as to leave the annular shoulder (Z embracing one end of the segments, and from which the segments project, so as to be engaged with the wires of the armature. The body of the commutator-head is turned down until the wires O are exposed and made to constitute coninmtator-segments, as indicated at c. The collar D is likewise dressed flush with the surfaces 0 of the commutator-segments. It is thus seen that the segments are held against revolving about their own axes by the band D. At the same time the commutator-brushes may be caused to bear clear out upon the said band I), thus causing the surfaces of the segments to be uniformly worn and prevent the brushes from wearing a groove down into the face of the segments. This construction also facilitates the ready oiling and wiping off of the face of the commutator while the machine is in motion.

\Vhat I claim is- 1. A commutator consisting of the head B, of non-conducting material, and rods 0, the head having the integral shoulder through which the rods are passed, said head and rods turned down to expose segment-faces c, and

in connection therewith the band D, of insulating material, embracing the head and segments and dressed fiush with the faces 0, substantially as described.

2. The commutator consisting of the head B segment-rods O c, and an annular recess formed 011 the end of the head B and rods 0, and in connection therewith a band of insulating material adapted to fit the said recess and hold the rods from displacement, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

HARRY II. BLADES.

IVitnesses:

M. B. ODoeHERTY, W. H. CHAMBERLIN.