US1465255A - Pigtail connection - Google Patents

Pigtail connection Download PDF

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Publication number
US1465255A
US1465255A US508853A US50885321A US1465255A US 1465255 A US1465255 A US 1465255A US 508853 A US508853 A US 508853A US 50885321 A US50885321 A US 50885321A US 1465255 A US1465255 A US 1465255A
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US
United States
Prior art keywords
pig
tail
coils
brush
pigtail
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US508853A
Inventor
Farnum F Dorsey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORTH EAST ELECTRIC Co
Original Assignee
NORTH EAST ELECTRIC CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NORTH EAST ELECTRIC CO filed Critical NORTH EAST ELECTRIC CO
Priority to US508853A priority Critical patent/US1465255A/en
Application granted granted Critical
Publication of US1465255A publication Critical patent/US1465255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/36—Connections of cable or wire to brush
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49954—Fastener deformed after application

Definitions

  • This invention relates to the flexible connectors or pig-tails used .in connection with brushes, for dynamo-electric machines, which are made of carbon or of compounds of carbon and metal. It is common to secure the pig-tails in holes drilled in such brushes, by tamping metallic material'into the holes around the ends of the pig-tails.
  • the object of the present invention is to produce a pig-tail connection, in the manner referred to, which shall be inexpensive and secure, and in which a good conductive engagement between the pig-tail and the brush-material shall be assured. I have discovered that this can be accomplished by using, as the material for securing the pigtail, stranded wireor cable either identical with or similar to that of which the pigtail itself is composed, this material being coiled around the end of the pig-tail and being tamped into a firm mass in -the hole which receives the pig-tail.
  • Fig. 1 is 5 a part-1y sectional elevation showing a brush provided with two holes, in one of which is a pig-tail which has been secured in the manner described herein, while a pig-tail in process of attachment is shown in the other hole.
  • Fig. 2 shows a pig-tail to which the bonding material has been applied in a A different manner.
  • Pigtails are usually made in the form of cables or stranded conductors, consisting of numerous fine wires of soft copper. I have found that this same material or a similar material of any soft metal, constitutes an excellent bonding-material for the pig-tail. As shown in Fig. 1 of the drawings, the matethe coils 1 Serial No.- 508,853.
  • rial of the pi g-tail 3 has been merely bentback and wound around the body of thepig-tail, so as to produce a series of coils 4.
  • the pig-tail is then introduced into the hole in the brush 5, and by means of a suitabletoolG pressure is applied to the coils 4, suflicient to compress them into a compact mass which closely fills the lower part of the hole and presses tightly iigainst its walls, as shown at the right of
  • the strands of the wire used as bonding- Inaterial lie in the direction in whichv they present the maximum frictional resistance to withdrawal of the pig-tail.
  • the arrangement has also increased effectiveness owing to the fact that the pig-tail, being continuous with the lowermost coil 4, cannot be withdrawn without withdrawing all of the compacted coils in a mass, so that the cnrity of the pig-tail depends, not on friction between the pig-tail and the bondingmaterial, but upon the friction at the greater area of contact between the bonding-material and the brush.
  • coils of bondingmaterial continuous with the pig-tail they may be made separate as in Fig. 2, where are made of a separate piece of stranded conductor wrapped around the pigtail 8, and the lower end 10 of the latter is bent back and spreadout against the outer surfaces of the coils, so as to anchor it securely.

Description

Aug. 21, 1923. 1,465,255
F.. F. DORSEY PIGTAIL CONNECTION Filed Oct. 19 1921 Hnwntcwrr Patented Aug. 21, 1923.
UNITED STATES PATENT OFFICE.
FARNUM I. DORSEY, OF ROCHESTER, NEW YORK, ASSIG'NOR TO NORTH EAST ELECTRIC COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.
' PIGTAIL CONNECTION.
Application filed October 19, 1921.
To all whom it may concern:
Be it knownthat I, FARNUM F. DORSEY, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Pigtail Connections; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
This invention relates to the flexible connectors or pig-tails used .in connection with brushes, for dynamo-electric machines, which are made of carbon or of compounds of carbon and metal. It is common to secure the pig-tails in holes drilled in such brushes, by tamping metallic material'into the holes around the ends of the pig-tails.
The object of the present invention is to producea pig-tail connection, in the manner referred to, which shall be inexpensive and secure, and in which a good conductive engagement between the pig-tail and the brush-material shall be assured. I have discovered that this can be accomplished by using, as the material for securing the pigtail, stranded wireor cable either identical with or similar to that of which the pigtail itself is composed, this material being coiled around the end of the pig-tail and being tamped into a firm mass in -the hole which receives the pig-tail.
In the accompanying drawings, Fig. 1 is 5 a part-1y sectional elevation showing a brush provided with two holes, in one of which is a pig-tail which has been secured in the manner described herein, while a pig-tail in process of attachment is shown in the other hole. Fig. 2 shows a pig-tail to which the bonding material has been applied in a A different manner.
Pigtails are usually made in the form of cables or stranded conductors, consisting of numerous fine wires of soft copper. I have found that this same material or a similar material of any soft metal, constitutes an excellent bonding-material for the pig-tail. As shown in Fig. 1 of the drawings, the matethe coils 1 Serial No.- 508,853.
rial of the pi g-tail 3 has been merely bentback and wound around the body of thepig-tail, so as to produce a series of coils 4. The pig-tail is then introduced into the hole in the brush 5, and by means of a suitabletoolG pressure is applied to the coils 4, suflicient to compress them into a compact mass which closely fills the lower part of the hole and presses tightly iigainst its walls, as shown at the right of The strands of the wire used as bonding- Inaterial lie in the direction in whichv they present the maximum frictional resistance to withdrawal of the pig-tail. The arrangement has also increased effectiveness owing to the fact that the pig-tail, being continuous with the lowermost coil 4, cannot be withdrawn without withdrawing all of the compacted coils in a mass, so that the cnrity of the pig-tail depends, not on friction between the pig-tail and the bondingmaterial, but upon the friction at the greater area of contact between the bonding-material and the brush.
In place of making the coils of bondingmaterial continuous with the pig-tail, they may be made separate as in Fig. 2, where are made of a separate piece of stranded conductor wrapped around the pigtail 8, and the lower end 10 of the latter is bent back and spreadout against the outer surfaces of the coils, so as to anchor it securely.
The invention claimed is:
1. The combination, with a carbon brush or the like provided With a hole, of a stranded conductor extending into thehole, and bent back and coiled around itself, with the coils compacted together and compressed into frictional engagement with the walls of the hole to secure the conductor to the brush.
2. The method of attaching a pig-tail connector to a brush, which consists in winding coils of stranded wire conductor around the end of the pig-tail, introducing said end and the coiled material into a hole in the brush, and tamping the coiled material into a compact mass.
. FARNUM F. DORSEY.
US508853A 1921-10-19 1921-10-19 Pigtail connection Expired - Lifetime US1465255A (en)

Priority Applications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US3002134A (en) * 1957-09-19 1961-09-26 Sylvania Electric Prod Electrical translator device and method of manufacture
US3087239A (en) * 1959-06-19 1963-04-30 Western Electric Co Methods of bonding leads to semiconductive devices
US3128648A (en) * 1961-08-30 1964-04-14 Western Electric Co Apparatus for joining metal leads to semiconductive devices
US5042146A (en) * 1990-02-06 1991-08-27 Watson Troy M Method and apparatus of making an electrical interconnection on a circuit board

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US3002134A (en) * 1957-09-19 1961-09-26 Sylvania Electric Prod Electrical translator device and method of manufacture
US3087239A (en) * 1959-06-19 1963-04-30 Western Electric Co Methods of bonding leads to semiconductive devices
US3128648A (en) * 1961-08-30 1964-04-14 Western Electric Co Apparatus for joining metal leads to semiconductive devices
US5042146A (en) * 1990-02-06 1991-08-27 Watson Troy M Method and apparatus of making an electrical interconnection on a circuit board

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