US402990A - Commutator-brush controller for electric motors - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1. W. L. SILVEY. GOMMUTATOR BRUSH CONTROLLER FOR ELECTRIC MOTOR-S.

No. 402,990. Patented May 7, 1889.

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w. L. SILVEY. GOMMUTATOR BRUSH CONTROLLER FOR ELECTRIC MOTORS.

Patented May '7, 188-9.

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\VILLIAM L. SILVEY, OF LIMA, OHIO.

COMMUTATOR-BRUSH CONTROLLER FOR ELECTRIC MOTORS.

SPECIFICATION forming part of Letters Patent No. 402,990, dated May 7, 1889.

Application filed August 22, 1888! erial No. 283,478: (No model.)

To aZZ whom it may concern:

Be it known that I, \VILLIAM L. SILVEY, a resident of Lima, in the count-y of Allen and State of Ohio, have invented certain new and useful Improvements in Commutator-Brush Controllers for Electric Motors, of which the following is my specification.

My invention relates to the peculiar devices for holding the brushes on an. electric machine, by which it is possible to change the direction of revolution in the armature by changing the point of contact on. the commutator. This I accomplish in this device by employing four brushes, and raising one set of brushes and depressing the other, as will be more readily understood by the accompanyin g drawings.

The peculiar advantageI claim for this device is ease of manipulation, solidity of parts, and the non-liability of getting out of order.

Referring to the accompanying drawings, which are made a part hereof, and in which similar letters of reference refer to similar parts, Figure l. is a side view of the entire apparatus mounted in proper position on the hub or journal-bearing E of the electric motor. Fig. 2 is a front view in detail. Fig. 3 is arear view from commutator side, showing the circuit wires attached. to their respective brushes. Fig. 4: is a front view with the journal-bearing removed and one set of brushes depressed so as to touch the commutator. Fig. 5 shows the other set of brushes depressed so as to reverse the rotation of the armature. Fig. 6 shows the rod, clamp, and bar to which the brush-holders are attached and on which they are suspended; and Fig. 7 shows the ring B with. the lever B broken off, showing the projecting lugs 1), whose oiiice is to rotate the brush-holders. Fig. 8 is a vertical section in order to more fully illustrate the relative position of rings A. and B The rotating lever consists, principally, of a ring, A*, on one side of which is cast a flat upright lever, A, having projecting stem A, and on the lower side a second projecting wing and projecting stem, A. These projecting stems A. are drilled to act as a journalbearing for the spindles O C. These spindles one at the top and the other at the bottomhave attached at one end the split clamp O and at the other the cross-bar F. This bar F is made of an insulating substance-as vulcanized fiber or hard rubber.

The split clamp O is shown to best advantage in Fig. 6,0ne side being split and having a screw, C for clamping it to the spindle O, and the other side having a notch similar to the tooth of a spur-gear, into which the small lug b on ring B fits. This lug serves to r0- tate the spindle C.

It will be observed that the inside of the lever-ring A is bored to the on the turned hub of the bearing E, and the outside is turned to receive the bored ring B, to which the controlling-lever B is attached. The two rings, B and A are prevented from slipping apart by the flat or flange ring B which is securely held to the face of ring A by numerous screws, B In this way the lever A is free to rotate on the hub of the bearing E, thus changing the position of the entire apparatus in the direction of rotation.

In case it becomes desirable to change the direction of the current in the armature-coils, the latch Z) is depressed, thereby disengaging it from the notches a, and the lever B is rotated. along its bearing on the outside of the ring A By moving the lever B to the right, allowing the latch to rest in the notch, as

shown in Fig. 4, one set of brushes is brought into contact with the commutator S. By moving the lever B to the left, as shown in Fig. 5, the other set of brushes is brought into contact with the commutator S, and by moving the lever so that the latch will rest in the middle notch, as shown in Fig. 2, all the brushes are raised cit the commutator.

It will be observed that only two brushes can ever rest on the commutator at one time, and these brushes are always on opposite sides or at an angle of one hundred and eighty degrees to each other. The upper set of brushes are electrically connected together to one terminal, and the lower set of brushes are electrically connected to another terminal, as shown in Fi It is not considered necessary to show the electrical connections in any of the figures but Fig. 3. The object of the screw a is to prevent the lever B from having too much motion, which would make the brushes bear too hard on the commutator. The brush clamp or holderD is made in a peouliarman ner. One side has a stem cast into it, by which it is held in place and supported on the insulated fiber bar F. By thus casting the holder and stem both in one piece and making the turned stem act as a support for all I can get almost any degree of adjustment desired in my brushes. The brushes may be turned down or up or any other way desired. The two brush-holdersone at each end of the bar F-are adjusted, with relation to the commutator and each other, by loosening the clamp O and turning the spindle C until each brush is an equal distance from the commutator. The screw 0 is now tightened, which sets the clamp tightly against the spindle and prevents it from rotating, except by the action of the lug b. The stems A are made unusually long, which makes the rod O Very steady in its bearing, and consequently prevents any shifting of the brushes on the commutator.

Having fully described my invention, what I claim as new, and wish to secure by Letters Patent of the United States, is

1. In a commutator-brush controller for electric motors, the combination of the ring B, teeth I) h, lever B, latch I), notched lever a, and spindles c 0 operated by the teeth attached to the ring B, as set forth.

2. The combination, in a commutator-brush controller for electric motors, of the split brushes D D D D, bars F F, rods 0 c, and split clamps c 0, attached to the spindles, whereby the position of thebru shes is changed, as set forth.

3. The combination, in a commutator-brush controller for electric motors, of the main ring a, mounted on hub or journal-bearing E, ring B and ring a attached thereto, lever B, for operating holders D D D D, and insulating-bars F F, spindles c a, split clamps c c, and teeth I) I), attached to ring 13, for operating the brushes D D D D, as set forth.

4. In a commutatorbrush controller for 1 electric motors, the eombinatio11,with the ring dles by set-screws 0 as set forth.

WILLIAM L. SILVEY,

\Vitnesses:

R. O. WARNER, E. W. 000K.

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