US1171630A - Brush connection. - Google Patents

Description

J. NAYDOR.

BRUSH CONNECTION Patented Feb. 15, 1916.

TIT}.

INVENTOR. J U EN MAY]: 0 n

B Y 6( MW ATTORNEY WITNESSES JOHN NAYLGOR, OF LAKEWOOD, OHIO, ASSIGNQPR TO NATKONAL GARBOIZ' CJMPAHY, A

ooneonn'i'xon on one? mess anus CONHEQEION.

menses.

' Appllcotion filed 142mb :2, it

To (all whom it may concern. v

Be it known that I, J 0111 NAxDoR, o subject of the Emperor of Austrinllungztry, residing Lakewood, in the county of Cuyahogs ,State of Ohio, have invented v a certain new and useful Improvement in Brush Connections, of which the following is s full,1cleer, and exact desc'ription'.'

Thisinvention relates to festexiingigcom meeting cables to electric contacts such as carbon brushes for dynamo electricv mm chines. In such connections flexible copper caloies known as pigtails are fastened 'to brushes in elerge variety of Ways, for ex ample, icy bolting, soldering '01- riveting. Each of these types are furthermore used in any one of a number of modifications each of which is especially adopted fonvorious His/BS. i

My invention relates to on improved type of pigtoil connection which is permanently fastenedto thebrush without the use of solder, bolts, rivets, or by: introduction of any additional festeningmeons for attaching the pigtuil to the brush. 1

In the accompanying devings and de scription relating thereto, a method of up plying o. pigtail without the use of edditionul elements is disclosed, although it will be understood that my invention is not to be limited to the specific disclosure.

In the-drawings: Figure 1 is a cross section through the center of a connection betore the end. of the cable is spun. Fig. 2 is a similar cross section with the cable drawn into the hole and u tool in position to spin the cable. F 3 shows the brush with the cable spun. into the hole. Fig. l per spective View of one type of finished brush.

5 is e modified form of connection.

To form 2. connection the carbon brush 1 has two intersecting passages or holes 2 and '3 drilled therein through which a pigtoil 4 is passed. The holes are preferably pei'pen dieulor to each other and drilled in the faces as shown, but they could, of course, he drilled in otheifaces of the brush. The diameter of the opening 2 is slightly larger than the pigtoil and the diameter of the pets sage S is made still larger.

In making the connection the cable is pushed through holes 2 and 3 ends coil 5 formed one end. to fit into the hole 3. in

stead of forming a coil, the cable may he twisted, spluyed out or hunched at one end Specification of Letters Patent.

acted upon by 2.

Patented Fol). 1.5, 1916.

Serial No. 13,866.

ioiining the enlarged i 1, t is drawn cock note he ii; of

ale that is so Mi l %P-.:.ild. on to which the hole 3 is to he filled when completed.

in Fig. 2 the brush is,in position to be spinning tool 6 to spin it ightly into the hole. The spinning tool consists of a rod of approximately the some dienieteros the hole 3, end is adopted to he rotated rapidly by any means such as a drill C'hllQlI T. The spinning tool simultaneously twists and. compresses the fine copper. of the cable to densely compact them therein and ceuse them to press into and adhere to the sides of the hole. The spinning tool forces the copper wire down. the hole to 2: level considerably below the "face of the brushond makes a smooth, burnished coo per surface. The Jun copper strunzls, 1. feet, look like exactly fitted into the hole 3. The amount a polished, solid copper disk of material in the coil 5 is preferably made sufficient to give it disk of somewhat greater thickness than the diameter of the hole In making a connection. of the t" in the form shown in Fig. 53-, the unfiiled port of the opening 3 is filled with suitable filling material such cement 8. Ordinarily this is not necessary, but if an iron, cop

per, or other current conducting cement is used, the conduct vity and mechanical strength is still furt er increased.

Connections using a spun pigteil are less e 'pensive to nienufoctui'e nose the drillin involved is no more ordinarily re lured for most connections. The new connection is exceptionally nest in appearonce and adopted for use with practically all types of brush holders. low resistance which it is fou'iid to possess may be attrihutcd to combined spiiining and pressure forcing the fine copper wires, which are very flexible, into such intimate contact with the carbon n shown, considerable thlckness of the disk is ale-sin into the'opening and the spinning the gcod'oontoct secured by the nnels 45 min 1 into ed ed into n; cout and "with sni:

their tor in said um i133 tcndin mcls with one and spin 5 of one chunn (is in in he channel.

tersectmg (tha 01301:

the will];

such Null 7 a cam;

avmg a condu \midea mu m J 0i 2,

'wg 1n it h spun

spinning the h lowed inw comluct w 41' and 0 mi (1. p :1 ct m ct intimaw the channel

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