US533084A - Rectifying-commutator and method of making same - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

H. G. REIST. REGTIFYING GOMMUTATOR AND METHOD OF MAKING SAME.

Patented Jan. 29, 1895.

(No Model.)

2 Sheets-Sheet 2. H. G. REIST. REOTIFYING GOMMUTATOR AND METHOD OF MAKING SAME.

Patented Jan. 29, 1895.

UNITED STATES PATENT OFFICE.

HENRY G. REIST, OF SOHENEOTADY, NEW YORK, ASSIGNOR TO THE THOMSON- HOUSTON ELECTRIC COMPANY, OF BOSTON, MASSACHUSETTS.

RECTlFYlNG-COMMUTATOR AND METHOD OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 533,084, dated January 29, 1895.,

Application filed October 19,1 894- Serial No. 526,864- (No model.)

To ttZZ whom it may concern.-

Be it known that I, HENRY G. REIs'r, a citizen of the United States, residing at Schenectady,in the county of Schenectady, State of 5 New York, have invented certain new and useful Improvements in Oommu'tators and Methods of Making the Same, of which the following is a specification.

My invention relates to the commutators of dynamoelectric machines; and has for its object to provide a cheap and simple method of making a rectifying commutator for an alternating current dynamo, or motor of the synchronous type. It has especial advantages I more particularly for the larger sizes of commutators,

To the ends pointed out, I construct my commutator of a single ring of metal having a deep internal groove, leaving two flanges,

one upon each side. I then bore through the ring from opposite sides as far as this groove and channel out the spaces between the borings so that the ring is by this means divided into two different rings except for the face 2 5 holding the two flanges together. In the borings I insert wooden plugs, and then divide the face of the commutator with saw-cuts extending from the face down into the plugs. In these cuts I put mica or other customary o insulation, and then apply the usual clamping rings. By this means I obtain two wheels or rings having registering portions separated from each other by insulation, they being somewhat like the so-called crown wheel 5 in appearance, and the construction is a rigid and economical one, well adapted to the purposes for which it is used. As will be seen, alternate sections of the commutator are connected to each other by the metal of the ring,

so that, in the particular construction exemplified, it is only adapted for use as a rectifying commutator for alternating current.

The accompanying drawings show illustrations of my invention, Wherein- Figure 1 is a side elevation; Fig. 2, a section upon the line 22 of Fig. 1. Fig. 3 is a side elevation looking to the right,with the holes bored and the intervening spaces cut away; Fig. 4, a similar view looking to the left; Fig. 5, a section upon the line 5 5 of Fig. 3, all of the double-flanged ring. Fig. 6 is a side elevation showing the commutator completed except the clamping rings. Fig. 7 is an enlarged detail, and Fig. 8 is a sectional end view of the commutator with the clamping rings attached.

Referring to the drawings by letter, A is the ring, of which B, B are the side flanges, separated by the groove L. As will be seen, the outer surface of the ring is turned smooth, and is that upon which the brushes are intended to bear.

Referring to Fig. 3, the flange B is shown in side elevation, and in this flange holes 0,

O are bored reaching through to the groove L. Alternate spaces between these holes are cut away, as shown at F.

In Fig. 4 I show the opposite flange B in which similar holes 0 are bored and similar cut-away spaces F are formed, but these alternate in position with those shown in Fig. 3.

Fig. 5 shows more clearly the construction, the reference letters used being the same as those in former figures.

In Fig. 6 I show the commutator advanced a step nearer completion. Therein the pins D, D of wood are shown driven into the holes, and slots, E, E, are cut through from the edge of the commutator into each hole, a saw-kerf reaching into the wood of the pins D. 'In each of these kerfs a strip of mica M is inserted, as seen best in Fig. 7, and is kept in place by a pin M driven through the wood of the pin D and through the mica.

In Fig.8 I show the completed commutator, clamping rings G, H being applied to the two sides thereof and being held together by bolts 1, I, a thick sheet or ridge of insulation forming the ridges K, K, being applied between the clamping ring and the commutator to prevent 9o short-circuiting. At N I show one of the leads by which currentis introduced,the other one not being shown in the drawings.

By the terms alternating current dynamo or motor I do not mean necessarily a single 65 phase alternating machine, but I mean to include also multiphase machines, as the application of my invention to currents of one or more phases is practically the same, and in this sense the term is used in the claims.

What I claim as new, and desire to secure by Letters Patent of the United States, is=- 1. The process of making a rectifying commutator herein set out, which consists in providing a ring with a plurality of flanges and an internal groove, boring through the flanges to the groove, slotting between the holes alternately on each flange, cutting through from the face of the commutator to the holes, insorting insulation in the cuts, and securing the parts together, as set out.

2. A rectifying commutator composed of registering portions cut from a flanged ring having an internal groove, and having suitable insulation between the registering portions.

3. In a rectifying commutator, the combination of a double-flanged ring, cut-away portions upon each flange alternating in position, outs extending from the face of the commutator to the cut-away portions, and means for securing the parts together.

t. In a rectifying commutator, the combination of a double-flanged ring having an internal groove, cut-away portions upon the flanges alternating in position, wooden pins in the cut-away portions, cuts extending from the face of the commutator partly through the wooden pins, insulation in such cuts, and means for securing the parts together.

5. In a rectifying commutator, the combination of a double-flanged ring having an internal groove, slots alternating in position upon the two flanges, Wooden pins in the slots, cuts extending from the face of the commutator partly through the wooden pins, insulation in such cuts, clamping rings and bolts to hold the parts together, and insulation between the rings and the commutator.

In witness whereof I have hereunto set my hand this 10th day of October, 1894-.

HENRY G. REIST.

Witnesses:

B. B. HULL, O. L. HAYNES.

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