GB1281336A - Improvements in and relating to brush lifting gear for electrical machines - Google Patents

Improvements in and relating to brush lifting gear for electrical machines

Info

Publication number
GB1281336A
GB1281336A GB39213/68A GB3921368A GB1281336A GB 1281336 A GB1281336 A GB 1281336A GB 39213/68 A GB39213/68 A GB 39213/68A GB 3921368 A GB3921368 A GB 3921368A GB 1281336 A GB1281336 A GB 1281336A
Authority
GB
United Kingdom
Prior art keywords
polepieces
solenoid
air gap
brush
lifting gear
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
Application number
GB39213/68A
Inventor
Frederick Raymond Jones
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB39213/68A priority Critical patent/GB1281336A/en
Priority to FR6928127A priority patent/FR2024763A6/fr
Priority to US850516A priority patent/US3591820A/en
Priority to DE19691941593 priority patent/DE1941593A1/en
Publication of GB1281336A publication Critical patent/GB1281336A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/52—Motors acting also as generators, e.g. starting motors used as generators for ignition or lighting

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Dc Machiner (AREA)

Abstract

1281336 Brush-gear for dynamo-electric machines PLESSEY CO Ltd 13 Aug 1969 [16 Aug 1968] 39213/68 Heading H2A [Also in Division H1] In brush-lifting gear similar to that disclosed in Specification 1,259,777 incorporating a rotary actuating solenoid having radially inner and outer polepieces 35, 36 defining an air gap between them into which armature polepieces 43 coupled to the brushes are movable against a spring in response to energization of the solenoid, the polepieces 36 are shaped at 36a, Fig. 2, by a single angular machined cut so as to produce an air gap which converges away from the direction of entry of the polepieces 43 whereby the torque/rotation characteristic of the solenoid is improved. Alternatively, Fig. 4, the armature polepieces 43a are provided with auxiliary polepieces 43b which bridge the stator polepieces 35, 36 as the polepieces 43a enter the air gap. The auxiliary polepieces may be faced with thin strips of non-magnetic material to prevent sticking when the solenoid is deenergized.
GB39213/68A 1968-08-16 1968-08-16 Improvements in and relating to brush lifting gear for electrical machines Expired GB1281336A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB39213/68A GB1281336A (en) 1968-08-16 1968-08-16 Improvements in and relating to brush lifting gear for electrical machines
FR6928127A FR2024763A6 (en) 1968-08-16 1969-08-14
US850516A US3591820A (en) 1968-08-16 1969-08-15 Brush lifting gear for electrical machines
DE19691941593 DE1941593A1 (en) 1968-08-16 1969-08-16 Brush lifting device for an electric commutator machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39213/68A GB1281336A (en) 1968-08-16 1968-08-16 Improvements in and relating to brush lifting gear for electrical machines

Publications (1)

Publication Number Publication Date
GB1281336A true GB1281336A (en) 1972-07-12

Family

ID=10408316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39213/68A Expired GB1281336A (en) 1968-08-16 1968-08-16 Improvements in and relating to brush lifting gear for electrical machines

Country Status (4)

Country Link
US (1) US3591820A (en)
DE (1) DE1941593A1 (en)
FR (1) FR2024763A6 (en)
GB (1) GB1281336A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879624A (en) * 1972-05-04 1975-04-22 Plessey Handel Investment Ag Rotary solenoids in brush-application gear
US3867679A (en) * 1973-07-11 1975-02-18 Mcculloch Corp Motor field strength variable brush pressure apparatus and method
US8558429B2 (en) 2011-01-05 2013-10-15 General Electric Company Systems, methods, and apparatus for lifting brushes of an induction motor
US8674581B2 (en) 2011-01-05 2014-03-18 General Electric Company Systems, methods, and apparatus for shorting slip rings of an induction motor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1881666A (en) * 1932-02-13 1932-10-11 Delco Prod Corp Centrifugal device for electric motors
US2377260A (en) * 1942-08-19 1945-05-29 Bendix Aviat Corp Brush operating mechanism
US2446297A (en) * 1944-03-07 1948-08-03 Bendix Aviat Corp Starter
US2753477A (en) * 1953-08-31 1956-07-03 Gen Motors Corp Electrical brush assembly
US2906939A (en) * 1958-04-28 1959-09-29 Gen Motors Corp Regulating circuit for generators
US3278777A (en) * 1964-05-25 1966-10-11 Allis Chalmers Mfg Co Brush lifting device for dynamoelectric machines

Also Published As

Publication number Publication date
DE1941593A1 (en) 1970-02-19
US3591820A (en) 1971-07-06
FR2024763A6 (en) 1970-09-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees