US1210703A - Commutator. - Google Patents

Description

C. F. SCHNEIDER.

COMMUTATOR.

APPLICATION FILED JULY 21.1914.

1,210,703. Patented Jan. 2,1917.

min @5325 UNITED STATES PATENT OFFICE.

CHARLES F. SCHNEIDER, OF SPRINGFIELD, OHIO. ASSIGNOR TO THE ROBBINS & MYERS COMPANY, A CORPORATION OF OHIO.

GOMMUTATOR.

Application filed July 21, 1914.

To all whom it may concern:

Be it known that I, CHARLES F. SCHNEI- DER, citizen of the United States America, residing at Springfield, county of Clark, and State of Ohio, have invented certain new and useful Improvements in Commutators, of which the following is a full, clear, and exact description.

This invention relates to an improvement in electric machines which embody an armature comprising commutator structure.

On of the objects of the present invention is to simplify the construction of the armature of electric machines, and at the same time to increase the durability and efficiency of the machine by providing for dependable mechanical. connections and highly efficient electrical connections between the armature, commutator and the respective armature leads.

It is another obj ectcf the present invention to provide an armature for an electric machine, having simplified commutator structure, whereby the assembling and disassembling of the commutator and the armature will be greatly facilitated, and the cost of manufacture of the said parts materially reduced.

In the construction ,and manufacture of electric machines which embody armature structure, it will be understood that the sizes of the armature will vary in accordance with the size of the machine, and, of course, the commutator structure, including the conductive segments and the insulating portions will consequently vary in proportion.

Ileretofore, it has generally been the practice to construct the commutator bar or segment from a solid piece of stock having conductive properties, and to then provide some means to secure the armaturelead to said bar or segment, in order to effect the desired electrical connection.

From the above it will be noted that in armatures through which a heavy current is to flow, the commutator must be of much heavier conductive material than where the armature is adapted to pass only a small amount of current.

In the present invention, a given size stock is selected for the manufacture of commutators, and this is punched or formed into stock parts, so that in building up the com- Specification of Letters Patent.

' proje Patented Jan. 2, 1917.

Serial No. 852,321.

which different current values are to pass, a more or less number of these punchings or formed pieces may be combined together to form the segments of the commutator. As a general rule, the segment heretofore employed has been formed of a single solid piece of stock and has been provided with an upwardly projecting portion, which is of substantially the same width as the segment to which the armature lead is secured in any desired manner. The present invention eliminates the necessity for forming the ator segments with an upwardly ng tang or end portion, by providing a pair of binding plates for each segment. Each of these binding plates is provided with a. tang or projection at one end, and so arranged that the armature lead may be placed directly in good electrical contact with the punched elements which form the commutator segments and then these tang portions of the binding plates are bent in upon the armature lead, to form a firm me chanical connection, and at. the. same time to provide an extremely efficient electrical connection.

Further objects and advantages of the present invention Willibe apparent from the following description, reference being had to the. accompanying drawings, wherein a preferred form of one embodiment of the present invention is clearly illustrated.

In the drawings: Figure l is a view in elevation of an armature embodying the pres ent invention. Fig. 2 is a vertical sectional view taken on the line 22 of Fig. 1. Figs. 3 and 4. are detail views of certain of the elements shown in Figs; 1 and 2.

Referring to the drawings, the numeral 20 designates an armature for an electric machine having a suitable winding 21, which is carried upon a core formed upon the shaft 2 The commutator structure of the armature, designated bv the numeral 223, comprises a plurality of segments, as is usual in the construction of commutators, but each of these segments in turn preferably comprise a plurality of different ele ments.

Referring to Fig. 2, an end view of an armature is clearly shown, wherein each, of the commutator segments comprises a plurality of conductive elements 24c and a pair of binding plates '36, which are so arranged that a tang or projecting portion '37, formed each of said binding plates, will be in position as to be bent down on the contact with the conductive segments 24. Between each of the adjacent segments suit able insulation 2? is provided in the usual referring to Fig. a it will be under stood that the size of the segment may be varied within extended limits; by the simaddition of more conductive elements to the respective segments For instance, if must have segments of sutjuicnt cornluctivity to carry a given amount the number of conductive eleof the commutator vnts in be readily determined.

constructing the binding plates of a. I CQlTltllr, *5 will be seen that thei'ieces- .0. providing a tang portion for each comunitator segments, of substantially 2 50.1119 width as the segment itself, is mated, thus permitting a substantial in the construction of the segment.

curse, when. the leads have been placed per 0-: sition, and the tangor projections oi the binding plates bent down upon said leads, solder applied to the assembly as to insure the mechanical connection l3 reference to Fig. 2, it will be readily that the arn'iature lead is brought di- 1'( i y into contact with the entire upper surface of each of the elements which comprise at claim is as follows 2- L, A. commutator having segments, each ture lead, once it has beenplaced in jections and connected w elements. v

3. In an armature for electric machines, provided with windings and leads therefor; a commutator having a segment comprising a plurality of conductive elements; and binding plates in contact with said conductive elements and having flexible projections between which the armature leads may be clamped securely in contact with the conductive elements.

4. In a commutator, a commutator bar comprising a plurality of individual elements having a plain contacting surface; and means adjacent thereto having provi; sions for holding lead Wires'in direct conith the conductive tact with the individual elements of the comer which comprises a plurality of individual two elements, and binding plates, in diets of which said elements are poslin an iii-nature for electric machines, nutator h mg segments each com g conductive elements; binding plates nts o." be secured by said p:ro-

.. v a i t are loads adapted to oned on. either side of said conductive mutator bar. Y i 5. In an armature for electric machines provided with windings and leadstherefor; a commutator having segments each comprising conductive elements; and binding plates in contact with. saidscbnductive ele-' ments throughout the length. thereof and having projections between which the armature leads are held in contact with said bind ing plates and the conductive elements.

6. ln an armature for electric machines,

a commutator having segments each comprising a conductive element, and binding plates in contact with said conductive element having projections of less width than the conductive element; andarmature leads adapted to be secured between said projec tions by bending said, projections upon said leads, whereby the armature leads are forced into direct contact with the conductive element and are also maintained in contact with the binding plates.

'2". In an armature for electric machines, provided with windings and leads therefor;

a commutator having bars, each comprising CHARLES F. SCHNEIDER.

l itnesscs Hanna R. STUART,

i. SMnL'rznR.

each, by adult-caning the commissioner of Eetentt Washin zton, (2..

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