US1441569A - Collector for dynamos and the like and process for making such collectors - Google Patents

Collector for dynamos and the like and process for making such collectors Download PDF

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Publication number
US1441569A
US1441569A US491851A US49185121A US1441569A US 1441569 A US1441569 A US 1441569A US 491851 A US491851 A US 491851A US 49185121 A US49185121 A US 49185121A US 1441569 A US1441569 A US 1441569A
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US
United States
Prior art keywords
collector
segments
bushing
coating
collectors
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
US491851A
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English (en)
Inventor
Fischer Otto
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US1441569A publication Critical patent/US1441569A/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
    • H01R39/04—Commutators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • 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
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the invention relates to the manufacture of collectors (for dynamos, motors, etc.) with bushings consisting of an insulating substance such as porcelain, steatite,bakelite or the like upon which the copper segments are formed'by a galvanic precipitation process.
  • the general idea of producing segments through galvanic deposits is known and the practical procedure hitherto consisted in covering the collector bushing with a layer of enamel and in thereupon applying protochloride of-gold to the surfaces that were to receive the conducting segments, this gold then being fixed, by annealing.
  • the surfaces thus covered with protochloride of gold were then thickened in an electrolytic bath by galvanic deposits.
  • bushing is either a kind .of insulating substance such as bakelite that can be worked which was not possible with the old process.
  • a special coating of enamel is not neces- 40 sary with the process according to the invention, and the segments need not be pre pared for the subsequent electrolytic bath by applying a special covering of protochloride of'gold for each individual segment.
  • An important feature of the invention consists in covering, by a galvanic or other process, the entire periphery of the body of the collector, which is made of a suitable insulating substance, with a coating of metal June 12, 1920; Aus
  • the collector segments thus produced are separated by well definedga s and the rough edges formed at the gaps y the saw afford a safeguard a ainst lateral movements of the segments. urther security against lateral movement may be provided in the shape of grooves formed upon the circumference of thecollector bushing.
  • the galvanic coating preferably extends so far over the collector bushing that it embraces the bushing at the ends and is thus safeguarded against the action of the centrifugal force set up when the collector rotates. If the collector bushing is made of bakelite or any other substance that can be worked by tools, the segments can be produced without any further measures by cutting up the integral copper coating with a saw.
  • Fig. 2 an end view ofthe collector or commutator.
  • a ceramic substance such as st'eatite, porcelain or the like, is employed, which is shaped as required before baking, due allowance being made for shrinkage.
  • the copper coating of the brush surface of the collector is preferably made thicker than the lateral gripping coatings, this being accomplished by applying a coating of varnish or the like to the side surfaces (as soon as they have become thick enough to securely hold the segments in place) and by subsequently continuing the galvanic process until a sufficient thickness of the brush surface of the collector is attained.
  • the integral copper coating is then shaved in a lathe andthen subdivided into the required number of seg-* ments by cutting deep grooves b with a saw.
  • these latter are filled with cement or some kind of special insulating substance capable of resisting heat.
  • the shallow rooves c in the lugs of the segments are also made with a saw or cutter, but only deep enough to allow the wires of the armature to be conveniently soldered to them.
  • the substance used for the collector bushing is steatite, porcelain or another ceramic material, deep grooves b for separating the segments, and shallow grooves c for fixing the armature wires are formed in the bushing whilst it is still soft.
  • the bushing is then baked, due allowance being made for shrinkage.
  • the deep grooves are then filled with ordinary putty so as to prevent the depositing of copper therein during thegalvanizing process. It is not absolutely necessary to fill the grooves b with cement or the like, but this is the preferred Procedure because if this were not done it would afterwards be necessary to carefully remove with a file or the like any layer of copper that might have been formed during the electrolytic process.
  • the copper deposit is cut upat the grooves b and c-with a saw, which also removes the filling substance from the grooves.
  • the new process may also be used for producing current distributing disks, switch plates, etc.
  • To make the collector fit exactly on the armature shaft its bore may be provided with a metal bush-' ing.
  • a sleeve of glazed cardboard may be inserted between the metal and the steatite bushings.
  • To obtain copper segments that are very securely fixed on the ceramic bushing a covering of protochloride of gold which is fixed by annealing may be used instead of th coating of graphite.
  • the coating of copper might also be put on by the Schoop squirting process or in any other way without departing from the spirit of the invention, but the copper deposited by a gal-. vanic process is specially adapted for collectors on account of its hardness.
  • collectors in the following claims is intended to cover all similar contrivances used for commutating or distributing electric currents, etc.
  • a process of producing collectors consisting in forming the body of the collector of a suitable insulating substance, in covering the surface of the body with an integral metallic coating, and in subsequently forming metallic segments by cutting up the coating.
  • a process of producing collectors consisting in forming the body of the collector of a suitable insulating bushing, in covering the periphery of the bushing with an integral metallic coating, and in subsequently forming metallic segments by cutting up the coating with a saw.
  • a process of producing collectors consisting in forming the body of the collector of a bushing of soft ceramic substance, dividing the periphery of the soft bushing into segments by making grooves in the periphery, hardening the soft bushing by baking it, covering the entire periphery with an integral metallic coating, and in finally cutting up the integral metallic coating at the said grooves so as to form metallic segments.
  • collectors consisting in forming the body of the collector of a bushing of soft ceramic substance, di-

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Insulating Bodies (AREA)
  • Electrolytic Production Of Metals (AREA)
US491851A 1919-04-30 1921-08-12 Collector for dynamos and the like and process for making such collectors Expired - Lifetime US1441569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE344231T 1919-04-30

Publications (1)

Publication Number Publication Date
US1441569A true US1441569A (en) 1923-01-09

Family

ID=33459962

Family Applications (1)

Application Number Title Priority Date Filing Date
US491851A Expired - Lifetime US1441569A (en) 1919-04-30 1921-08-12 Collector for dynamos and the like and process for making such collectors

Country Status (5)

Country Link
US (1) US1441569A (enrdf_load_stackoverflow)
DE (1) DE344231C (enrdf_load_stackoverflow)
FR (1) FR519926A (enrdf_load_stackoverflow)
GB (1) GB145528A (enrdf_load_stackoverflow)
NL (1) NL7419C (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671950A (en) * 1950-03-09 1954-03-16 Sukacev Lev Method of constructing thermopiles
US2696570A (en) * 1951-05-23 1954-12-07 Electro Tec Corp Element of mechanism for conducting electricity between relatively movable structures
US2959697A (en) * 1958-09-15 1960-11-08 Orenda Engines Ltd Slip rings
US2988721A (en) * 1959-08-07 1961-06-13 Arnold S Louis Multitap electrical element and method of making same
US3103060A (en) * 1958-02-24 1963-09-10 Teletrak Corp Commutator

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968283C (de) * 1942-04-30 1958-01-30 Siemens Ag Pressstoffkommutator fuer elektrische Maschinen
DE1036371B (de) * 1954-10-23 1958-08-14 George John Pandapas Stromwender oder Schleifringkoerper
DE1158164B (de) * 1957-06-08 1963-11-28 Fleischmann Geb Scheibenkommutator fuer elektrische Spielzeugmotoren u. dgl.
US3777367A (en) * 1971-12-02 1973-12-11 Ametek Inc Method of fabricating a commutator
FR2585521B1 (fr) * 1985-07-26 1987-11-20 Bruss Respub Nauc Procede de fabrication de collecteurs de machines electriques et collecteurs obtenus par ledit procede

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671950A (en) * 1950-03-09 1954-03-16 Sukacev Lev Method of constructing thermopiles
US2696570A (en) * 1951-05-23 1954-12-07 Electro Tec Corp Element of mechanism for conducting electricity between relatively movable structures
US3103060A (en) * 1958-02-24 1963-09-10 Teletrak Corp Commutator
US2959697A (en) * 1958-09-15 1960-11-08 Orenda Engines Ltd Slip rings
US2988721A (en) * 1959-08-07 1961-06-13 Arnold S Louis Multitap electrical element and method of making same

Also Published As

Publication number Publication date
DE344231C (de) 1921-11-18
NL7419C (enrdf_load_stackoverflow) 1922-08-15
GB145528A (enrdf_load_stackoverflow) 1921-10-24
FR519926A (fr) 1921-06-17

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