US702272A - Commutator-segment. - Google Patents

Description

No. 702,272. Patented June l0, E962.

W; H. WHNDLE.

CUMMUTATOR SEGMENT.

. (Apphcation filed Apr. 21. 1902.) (No Model.)

i y/7 ii,

UNITED STaTas @FFICE.

W iLiilAlii lVINDLE, OF Pi-HLADELPHEA, PENNSYLVANIA.

Q-FECIFICATIGN forming part of Letters E'atent No. 702,2?2, dated June 10, 1902.

Application filed April 21,1902. Serial No. 104.008. (llomodel) To ozZZ whom it may concern:

Beit known that i, WILLIAM H. WINDLE, a

citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain improvements in Commutator-Segments, of which the following is a specification.

The object of my invention is to so construct a commutator-segment for dynamoelectric machines or electric motors as to materially lessen thecost of the same, while at the same time-providing more effective means than usual for connecting thereto the terminals of the armature-coils, so as to insure free. ventilation of said connections and prevent ment in accordance with my invention; and

Figs. 6, 7, 8, and9 are respectively end views of Figs. 2, 3, 4, and 5.

. In the ordinarymethod of manufacturing commutators a series of segments composed of hard-drawn copper bars 'of the proper Wedgeshaped cross-section are built up into drum form with suitable insulation interposed between adjoining segments, and this drum is then turned down throughoutthe greaterportion of its length ahd to a depth sufficient to form at one end of the drum an annularflauge consistingof a projectinglug-at one end'of each of the commutator-segments, these lugs being then notched for the attachment of the terminals of the armature-coils or for the attachment of radially-projecting sheet-metal strips,which are soldered in the slots and have other strips riveted or secured to them at their outer ends, so as to form slotsfor the receptionof the armature-terminals, this latter construction being for the purpose of separating said terminals, so as to insure 'freeventilation of the same and prevent overheating. This is an expensive method of manufacture not only because of'the waste of metal involved in turning down the drum, but also because of the cost of the additional strips used for carrying the armature-coil connections and the labor involved in turning down the drum and fitting and securing these strips.

My invention has been designed with the view otred using the cost of material toa minimum, preventing waste, and at .thesame time saving labor. in-the, manufacture of the commutator. y

My invention comprises a'commutator-segment consisting of a bar of-the proper wedgeshaped cross-sectional form and having an armature-terminal connection bent up from said bar and by preference notched or slotted at the outer end for the attachment of the armature-terminal and twisted,so as to present this notch in the best position for the reception of said terminal.

In carrying out my invention I first take a hard-drawn copper bar 1 of the proper wedge-- shaped cross-sectional form, as shown in Figs.

2 and 6, and I form in the same near the top,

a longitudinal slot or saw-kerf 2, extending surnes a position at right angles to the body of the bar,'as shown in Figs. 4 and 8, and finally twist the finger, as shown in Figs. 5 and 9, so as to cause the slot 5 at the outer end of the finger to extend parallel with the bar 1, thereby bringing the same into line with the terminal Wires running to the armature-coils and providin g a length of slot for the reception of each wire which is equal to the width of the thick end of the bar 1, the latter being greater than the thickness of the finger 3, and hence giving a more extended surface for connection with the terminal than if a slot parallel with the bar 1 had been formed in the finger 3 after the same had been bent up but not twisted.

' The process of manufacture described, not only reduces waste of material to a minimum, but simplifies and cheapens the process of manufacture and correspondingly reducesthe labor cost, While at the same time the finger 3, being an integral part of the segment-bar IOC l insures the'beet possible electrical connection between the two.

Heving thus described my invention ll claim and desire to secure by Letters Petentl. A eommntator-segment consisting of at metellie her having a projecting finger bent up therefrom at one end, substantially as specified.

A commutator-segment consisting of a metallic leer having a projecting finger bent therefrom. at one end, said finger being notched at the outer end for the reception of the nrnizetnre-terrninel, substantially as speci- 3. A commutator-segment consisting oi t metallic bar having a projecting" finger bent up therefrom at one end, said finger being twisted to the extent of a partial turn and having at its outer enrl a slot for the reception of the armature-terminal, substantially as specified.

In testimony whereof I have signed. my name to this specification in the presence of two subscribing witnesses.

WllLLlAM l-l. WINDLE.

l fitnesses:

F. Brnon'ronn, J'os. KLEIN.

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