US2579565A - Commutator motor brush holder - Google Patents

Commutator motor brush holder Download PDF

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Publication number
US2579565A
US2579565A US181873A US18187350A US2579565A US 2579565 A US2579565 A US 2579565A US 181873 A US181873 A US 181873A US 18187350 A US18187350 A US 18187350A US 2579565 A US2579565 A US 2579565A
Authority
US
United States
Prior art keywords
sleeve
pressure
brush
brushes
brush holder
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
US181873A
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English (en)
Inventor
Giambonini Guido
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2579565A publication Critical patent/US2579565A/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
    • H01R39/38—Brush holders
    • H01R39/383—Brush holders characterised by the electrical connection to the brush holder
    • 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
    • H01R39/38—Brush holders
    • 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
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush

Definitions

  • My present invention relates to improvements in means incorporated in commutator motor brush holders for ensuring a positive contact between the carbon brushes and the commutator face and a positive power supply to .the commutator; and the objects of my invention are to obtain an improved power lead, a reduction in collector wear, and the use of extremely simple carbon brushes, in particular brushes which do not comprise any metallic fittings.
  • My invention is particularly applicable to single-phase alternating-current commutator motors and electric-traction motors in general, and affords convenient simplifications and advantages in the service of such motors and lowered operating costs.
  • Fig. 1 is a side view, partly in section, of a modern brush holder embodying one form of invention
  • Fig. la is a top plan view as indicated by the arrows AA in Fig. 1,
  • Fig. 2 is a front view of a modified contact cylinder comprising a retaining rib
  • Fig. 3 shows three difierent carbon brush structures a, b and c which may be used in connection with my invention
  • Fig. 4 shows a side view of an older type brush holder embodying a second form of invention, in which holders sometimes riders or spacers are used between loading finger and brush, and
  • Fig. 5 is a front view of a second modification of the contact cylinder provided by my present invention, which cylinder here has no retaining rib.
  • a conventional brush holder g are provided with recesses e (Fig. 1) in the rocking range of a loading bow d.
  • the loading finger normally used for depressing the carbon brush with the aid of a pressure element is replaced by the loading bow d.
  • the latter is secured to an arm 9' which is pivoted to holder g and engaged by a spring j which tends to rock the arm anticlockwise so as to bear down onto a contact cylinder lodged freely in the hollow provided on the head of brush t.
  • the said cylinder comprises an outside metallic sleeve 2 to which is secured a flexible power lead I which is disposed either on one side (as in Fig. l) or on both sides of sleeve 2. That portion of lead I which is subjected to wear and tear is protected by a spring sleeve .9.
  • the sleeve 2 transmits the pressure and current to the carbon brush t.
  • the bow d through a suitable opening (not shown) in sleeve e bears on a fragmentary core h made of an elastic and insulating material which dampens vibrations.
  • a metallic tube m bonded to the core h is provided where required, and serves for distributing the pressure of how it uniformly on the core 71. and for reducing the frictional losses between the rocking how (1 and the contact cylinder which moves in direction of the brushes t which bear radially onto the commutator C.
  • a retaining rib r is provided in the sleeve 2 of the contact cylinder, and a loop 1 (Fig. l) is fixed to the free end portion of bow d and passed through a slot in sleeve 2 on one side of rib r so that the latter holds the bow d in proper position with respect to tube m during the useful life of the brushes t.
  • my invention affords a further advantage in that one size of contact cylinder may be used therefor.
  • Different brush structures t, t and t may be used in my invention for one and the same size of contact cylinder, such as plural-part brushes (a), laminated brushes (b), and one-piece brushes (0).
  • a contact cylinder as disclosed by my present invention is made possible by the provision of a link it as shown in Fig. 4 which illustrates a second form of invention.
  • the sleeve 2 of the contact cylinder is provided with a single slot, and not as in the modification of Fig. '2 with a rib r. In this form also, all the components are secured against becoming disengaged.
  • a pressure and current transmitting device for brushes of an electric commutator motor and the like having brush holders and brushes slidable therein and wherein said brushes are provided with a slot in the brush head comprising a hollow contact sleeve loosely seated in said slot in said brush head, said sleeve extending over a substantial portion of said brush head, an insulating, elastic, vibration damping insert in the interior of said hollow sleeve, a pressure member pivotally mounted on said brush holder, a slide surface on said pressure member, said slide surface contacting and coacting with said insert whereby said contact sleeve is freely self-adjustable in accordance with the degree of wear of the brush.
  • said elastic, vibrationdamping insert being positioned in the manner of a sector of a circle, in the operative range of the pressure member, and the pressure distributing member being mounted in the contact sleeve, said sleeve having a slot through which extends the portion of the pressure member provided with the sliding surface and which acts on the pressure distributing member.
  • GUIDO GIAMBONINI GUIDO GIAMBONINI.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
US181873A 1949-09-01 1950-08-28 Commutator motor brush holder Expired - Lifetime US2579565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH674796X 1949-09-01

Publications (1)

Publication Number Publication Date
US2579565A true US2579565A (en) 1951-12-25

Family

ID=4528002

Family Applications (1)

Application Number Title Priority Date Filing Date
US181873A Expired - Lifetime US2579565A (en) 1949-09-01 1950-08-28 Commutator motor brush holder

Country Status (5)

Country Link
US (1) US2579565A (de)
CH (1) CH277794A (de)
DE (1) DE822693C (de)
FR (1) FR1024099A (de)
GB (1) GB674796A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311768A (en) * 1964-12-07 1967-03-28 Stackpole Carbon Co Pressure equalizing device for split brushes
US3445704A (en) * 1967-12-26 1969-05-20 Morganite Inc Current collecting triple wafer brush assembly
US3521102A (en) * 1968-08-23 1970-07-21 Morganite Carbon Ltd Mounting for an electrical contact brush

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072725B (de) * 1960-01-07 Schunk |& Ebe GmbH, Gießen Bürsten halter fur elektrische Maschinen mit einem zwischen Burstenhalterkorper und Druckhebel angeordneten Lenker
DE1088149B (de) * 1954-09-10 1960-09-01 Ringsdorff Werke Gmbh Der Stromzuleitung zu einer mehrteiligen Kollektorbuerste dienende Anordnung
DE968788C (de) * 1955-05-14 1958-03-27 Schunk & Ebe Gmbh Spreizbuerste fuer elektrische Maschinen mit walzenfoermigem Druckstueck
DE1109782B (de) * 1959-07-10 1961-06-29 Schunk & Ebe Gmbh Buerstenhalter fuer elektrische Maschinen
CH403057A (de) * 1963-09-02 1965-11-30 Galfetti Rolf Bürstenhalter für elektrische Kollektormaschinen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1277497A (en) * 1915-06-30 1918-09-03 Westinghouse Electric & Mfg Co Brush-holder.
GB142578A (en) * 1919-02-19 1920-05-13 Giuseppe Di Luigi Pestarini Improvements in rotary current collectors for electric machines
US1375124A (en) * 1918-01-17 1921-04-19 Jr Walter J Warder Brush-holder
US1495203A (en) * 1923-07-11 1924-05-27 Union Carbide & Carbon Res Lab Brush holder
DE660972C (de) * 1931-06-28 1938-06-07 Aeg Buerstenhalter fuer elektrische Maschinen, dessen Druckfinger mittels eines beweglichen Gelenkes gefuehrt wird

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1277497A (en) * 1915-06-30 1918-09-03 Westinghouse Electric & Mfg Co Brush-holder.
US1375124A (en) * 1918-01-17 1921-04-19 Jr Walter J Warder Brush-holder
GB142578A (en) * 1919-02-19 1920-05-13 Giuseppe Di Luigi Pestarini Improvements in rotary current collectors for electric machines
US1495203A (en) * 1923-07-11 1924-05-27 Union Carbide & Carbon Res Lab Brush holder
DE660972C (de) * 1931-06-28 1938-06-07 Aeg Buerstenhalter fuer elektrische Maschinen, dessen Druckfinger mittels eines beweglichen Gelenkes gefuehrt wird

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311768A (en) * 1964-12-07 1967-03-28 Stackpole Carbon Co Pressure equalizing device for split brushes
US3445704A (en) * 1967-12-26 1969-05-20 Morganite Inc Current collecting triple wafer brush assembly
US3521102A (en) * 1968-08-23 1970-07-21 Morganite Carbon Ltd Mounting for an electrical contact brush

Also Published As

Publication number Publication date
DE822693C (de) 1951-11-26
GB674796A (en) 1952-07-02
FR1024099A (fr) 1953-03-27
CH277794A (de) 1951-09-15

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