US903881A

US903881A - Commutator neck or lead.

Info

Publication number: US903881A
Application number: US28647605A
Authority: US
Inventors: Ashley P Peck
Original assignee: BULLOCK ELECTRIC Manufacturing CO
Current assignee: BULLOCK ELECTRIC Manufacturing CO
Priority date: 1905-11-09
Filing date: 1905-11-09
Publication date: 1908-11-17
Anticipated expiration: 1925-11-17

Description

A. P PEGK. COMMUTATOR NECK 0R LEAD. APPLICATION FILED-E019, 1905.

9,353 831; Patented New. 1?, 1908 mvxbm awe/g T. Pux

UNITED STATES PATENT OFFICE.

ASHLEY P. PECK, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE BULLOOKELEOIRIC MANU FAGTURING COMPANY, A CORPORATION OF OHIO.

COMHUTATOR NECK LEAD.

Specification of Letters Patent.

Patented Nov. 17, 1908.

To all whom it may concern:

Be it known that I, ASHLEY P. PECK, a citlzen of the United States, and resident of 'Milwaukee, in' the county of Milwaukee and namo-electric machines, considerable trouble" has been experienced because of the vibrationof the commutatorleads or necks, this vibration often being s'uificientto cause adjacent-commutator necks to engage to shortcircuit one or more of the armature coils.

Thishas been especially the case in'large machines which necessitate long commutator necks. To avoid this vibration, it has heretofore been found necessary to em loy special bracing auxiliary devlces, suc as fish cord lacing or insulating spacers between the adjacent necks.

It is the object of my invention to so construct the commutator necks that they will besuificiently strong inherently to Withstand any tendency to vibrate'and thereby obviate the necessity-of employing auxiliary bracing devices. This result is accomplished by makingeach'of the commutator necks of a cross section which-is other than a straight line,

so that in order to vibrate in any direction, the metal composing the neck will have to be bent edgewise to' a greater or less degree.

The particular novel features .of'my invention will appear from the following description and will be pointed out in the claims. 5

Figure l is a plan View of a commutator neck or lead embodying my invention; Fig. 2Iis an end view of the same, partly. in section; Fig. 3 is a transverse sectional view on the line 3 -3 of Fig. 1; Fig. 4-. is a similar sectional view showing a somewhat modified construction; and Fig. 5 1s a partial end elevation of an armature and a commutator provided with my improved'necks or leads.

Referring to the drawin s, 1 and 2 repre: sent two parallel stri s o sheetcopper or other suitable material, held together by rivets '3to form the .neck or lead. These strips are preferably punched out and rolled into the desired form 1n one operation. Each of the'stri s is formed with a central longitudinal ri or corrugation 4, as shown in Figs. 1, 2 and 3, thus making the stri 8 substantially U-shaped in cross section, whereby the twov strips may be nested together as shown. The corrugation 4 extends along the central portion of the strips 1 and 2 nearly to each end thereof, one end of the strips being bent as shown to receive the free ends 6 of the armature windings 7 while the opposite end may be left flat for connection to the commutator bars 8, as, shown in Fig. 5.

In Fig. 4 the two strips are shown as having-oppositely projecting edges 55, each strip thus being substantially lJ-shaped in cross section, and the two'strips placed together base to base.

The armature windings and the commu tator may be of any desired type, as per 36 they form no part of my present invention.

By making my commutator neck or lead sc that throughout a portion of its length the cross section is other than a straight line, a much greater stiiiness or rigidity is given to the neck, thereby eliminating or greatly reducing vibration and renderingaccidental electr cal contact between adjacent necks impossible. Moreover by reducingor avoiding vibration of the necks, crystallization of the copper or other metal forming the necks is prevented or greatly diminished, thereby lessening the liability of fracturing the necks.

My invention is also applicable in other electrical apparatus although it is primarily designed for use as a commutator lead or neck.

VVh'at I claim is 1. A commutator neck or lead composed of a plurality of similarly corrugated strips of sheet metal. nested and riveted together.

2. A commutator neck or lead composed of a plurality of-strips of sheet metal fastened together, each strip being corrugated lengthwise.

3. A commutator neck or lead composed of a plurality of strips of sheet metal fastened together, each strip being substantially U-shaped in cross section. v

4;. A commutator neck or lead composed of a plurality of strips of metal fastened together, eachQstrip having a transverse section two sides of which are substantially parallel and are other than straight lines.

5. In combination, an armature coil, a commutator-bar, and a neck or lead composed of a plurality of lengthwise corrugated strips of metal joining them.

6. In combination, an armature w nding,

:1 commutator, and necks or leads connecting them, said necks or leads being composed of strips of metal substantially U-shaped in cross section.

' 7. In combination, an armature coil, a commutator bar, and a .neck or lead connecting them, saidn'eck or lead being composed of a plurality of strips of metal fastened together and each having a transverse section two sides of which are substantially parallel and are other than straight lines ting elevations and depressions.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukeein the county of Milwaukee and State of Wiscousin in the presence of two witnesses.

ASHLEY P. PECK.

Witnesses:

H. Gr. UNDERWOOD, GEORGE FELBER.