US2658158A - Commutator - Google Patents

Description

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Nov. 3, 1953 "h m y 2 %/A.MOWQ

Patented Nov. 3, 1953 OFFICE 2,658,158 7 COMMUTATOR Joseph Bender, Jr., James Tipple, Elyria,

Eberly, and Richard Ohio, assignors to The General Industries Company, Elyria, Ohio, a corporation of Ohio Application August 3, 1950, Serial No. 177,422

3 Claims.

. Our invention relates to commutators and relates more particularly to commutators which are adapted for use on frictional horsepower motors, although not necessarily limited thereto.

It is an object'of our invention to provide an improved commutator which will .be simple to manufacture and to assemble with the armature coil. 1

1 Another objectof our invention is to provide an improved commutator which will efiiciently lock the. armature wire or wires in place.

A further object of my invention is to provide a commutator of the type described which may be assembled with a minimum of effort.

Other objects of my invention and the invention itself will become readily apparent by reference to the description of the invention which follows, in which description reference will be had to the accompanying drawings, wherein:

Fig. 1 is a top plan view of the commutator shell of our invention;

Fig. 2 is a side View of the Fig. 1;

Fig. 3 is an enlarged top view of a segment of the shell of Fig. 1;

Fig. 4 is an enlarged side view of the segment of Fig. 3;

Fig. 5 is an end view of the segment of Fig. 4;

Fig. 6 is a fragmentary perspective view of one of the segments in open position showing leads of the armature passing therethrough;

Fig. '7 is a side view of the assembled commutator of our invention immediately prior to the locking of the leads shown in Fig. 6 and showing a tool for locking the same in adjacent relation to said commutator;

Fig. 8 is an enlarged fragmentary view of the tool of Fig. 7 in section, showing the tool in its final forming position and the segment in locked relation to certain of said leads;

Fig. 9 is a view similar to that of Fig. 6 but showing a segment in a closed position, the leads being locked therewith.

Referring now to the drawings in all of which like parts are designated by like reference characters, the commutator shell of my invention is formed either in segments or in a blank split into segments and the segments, designated at l0, are formed of a suitable conducting material, as for example copper. Each segment, as best shown in Figs. 3, 4 and 5, is provided with an arcuate body portion I I, an integrally formed substantially fiat J-shaped radially outwardly extending leg portion I2, and a pair of lugs or tangs l3 and [4 extending radially inwardly of the body portion commutator shell of II. The lug [3 provided on the lower edge l3 of each of said segments initiates adjacent said leg portion 12 and is disposed inwardly angularly and upwardly of said edge and the leg 14 is aligned in spaced relation therewith, initiating on the upper edge 54 of the body portion II, and disposed angularly inwardly and downwardly of said edge.

The lugs l3 and I4 serve as anchors about which a cylindrical core of insulation I5 is molde in a manner well known to the art.

The leg portions 2.01? our invention are each provided with a radially outwardly extending fiat leg portion i5 and a notched foot I1 having an upwardly projecting nib l8 bent at an angle to the remainder of the foot and to the leg, as best shown in Figs. 4 and 6.

When all of the body portions of the segments, which are shown as eleven in number, are secured to the core [5, forming a cylindrical shell therefor, as shown in Figs. 1, 2 and 7, the legs l2 extend downwardly and radially outwardly thereof, their ends generally describing an outer circle as shown in Fig. 1. They are disposed upon the upper coil end of the armature 20 and a pair of lead wires 2| therefrom are then projected through the opening [9 in each foot, entering said opening from the underside of the said foot. The leads are locked within the nib end of the foot, either by pressing the tail of the nib down with a hand tool, such as pliers, or by means of a round hollow cup, as shown in Figs. 7 and 8, whereby all of the nibs of the several segments are simultaneously pressed down, forming a good mechanical bond.

After the wires are thus locked in place, the excessive wire can be out 01f either individually or collectively.

Although we have illustrated and described our invention in connection with a preferred embodiment thereof. we are, however, aware that numerous and extensive departures may be made however,

pended claims.

What we claim is:

1. A commutator segment comprising a commutator segment bar having a transversely arcuate outer surface and a lug integrally formed therewith extending from an end thereof, said lug being substantially entirely of flattened, and of J-shaped form, said lug comprising a long supporting arm, a relatively shorter supported arm, and a web integrally joining the outermost ends of the arms, the shorter arm initially extending from said web in a direction which is divergent from the plane of the longer arm, said arms having substantially opposing side edges defining a passage disposed between the arms which is initially of substantially greater width than the thickness of terminal wires to be secured thereto and adapted to loosely receive said terminals and said shorter arm adapted to be subsequently bent into the plane of said longer arm to wedgingly compress any said terminal wires between the said side edges of said arms.

2. A commutator segment comprising a commutator bar portion and a flattened, substantially J-shaped lug extending integrally outward from an end of said bar portion, the shorter arm of said lug being re-entrantly extending towards said bar portion from a web portion at the end of the longer arm, the laterally opposing edges of said arms being initially in different planes which extend divergently from said web portion, and said shorter arm adapted to be bent to cause it to be disposed progressively closer to the plane of the longer arm to lessen the distance between opposing side edges of the two arms, to wedgingly clamp a wire terminal between the arms.

3. A commutator segment comprising a commutator bar having a rearwardly extending terminal connector lug formed integrally therewith, said lug comprising two integrally joined fiattened metal arms disposed in laterally interspaced relation and being normally extended in intersecting planes, and adapted responsive to bending of at least one of said arms to be disposed approximately in a common plane, said arms having opposing side edges between which a wire terminal may be loosely disposed before bending of any of said arms, one of said arms being bent whereby said side edges are brought substantially closer together during such bending to compressively wedgingly clamp such wire terminal between the arms.

JOSEPH BENDER, JR. JAMES EBERLY.

RICHARD TIPPLE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,214,470 Jeffery Jan. 30, 1917 1,631,461 Bonsieur M June 7, 1927 2,400,590 Meyerhoefer May 21, 1946 2,451,500 Le Greid Oct. 19, 1948 FOREIGN PATENTS Number Country Date 7,772 France Aug. 12, 1907 361,467 Great Britain Nov. 26, 1931 391,888 Great Britain May 11, 1933

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