GB1192180A - A Rotary Electromagnetic Actuator - Google Patents

A Rotary Electromagnetic Actuator

Info

Publication number
GB1192180A
GB1192180A GB58227/67A GB5822767A GB1192180A GB 1192180 A GB1192180 A GB 1192180A GB 58227/67 A GB58227/67 A GB 58227/67A GB 5822767 A GB5822767 A GB 5822767A GB 1192180 A GB1192180 A GB 1192180A
Authority
GB
United Kingdom
Prior art keywords
rotor
polepieces
rotors
housing
shaft
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
GB58227/67A
Inventor
John Robert Hereford
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
Publication of GB1192180A publication Critical patent/GB1192180A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/18—More than two members
    • G03B9/22—More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

1,192,180. Electromagnetic actuators. J. R. HEREFORD. 21 Dec., 1967 [30 Dec., 1966], No. 58227/67. Heading H1P. [Also in Division G2] An electromagnetic rotary actuator comprises a rotor arranged for limited rotation about an axis and a pair of polepieces, the rotor comprising two semicircular portions having their centres of curvature offset on opposite sides of the axis, and the polepieces having arcuate faces the centres of curvature of which coincide with those of the rotor portions when the rotor is in the energized position. In a first specific embodiment, Fig. 2, two such rotors 59, 61 are mounted on a common shaft 57 of magnetic material supported at its ends in non-magnetic end plates 45, 47 of a cylindrical magnetic housing 43. Each rotor is provided with two arcuate polepieces 49, 51, 53, 55 secured in flux conductive relationship to the housing 43, and an energizing coil 73 wound on a bobbin 67 surrounds the shaft 57 between the rotors. A return spring may be connected between the shaft 57 and the housing 43, or may be incorporated as part of the load. In a second embodiment, Fig. 3 and Fig. 4 (not shown), a high speed camera shutter comprises three blades (115, 117, 119) mounted on the shafts 101, 103, 105 of three rotors 95, 97, 99. Each rotor is provided with a pair of polepieces 77, 79, 81, 83, 85, 87, which are simultaneously energized by three coils 89, 91, 93. Return springs (121, 123, 125) are connected between each of the shutter blades (115, 117, 119) and a supporting shutter ring (107).
GB58227/67A 1966-12-30 1967-12-21 A Rotary Electromagnetic Actuator Expired GB1192180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60618466A 1966-12-30 1966-12-30

Publications (1)

Publication Number Publication Date
GB1192180A true GB1192180A (en) 1970-05-20

Family

ID=24426919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB58227/67A Expired GB1192180A (en) 1966-12-30 1967-12-21 A Rotary Electromagnetic Actuator

Country Status (3)

Country Link
US (1) US3638550A (en)
DE (1) DE1589914A1 (en)
GB (1) GB1192180A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584247A1 (en) * 1985-06-27 1987-01-02 Bosch Gmbh Robert ROTATING INDUCTOR OF AN ELECTRICAL SERVOMOTOR EQUIPPED WITH CORNER-SHAPED POLAR PIECES

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564127A (en) * 1979-06-22 1981-01-17 Canon Inc Electromagnetic drive shutter
FR2460532A1 (en) * 1979-07-05 1981-01-23 Vandeputte Fils & Cie PERMANENT MAGNET FOR BISTABLE ELEMENT AND BISTABLE ELEMENT AND DATA VISUALIZATION UNITS WITH AT LEAST ONE MEMBER
US4321571A (en) * 1979-11-05 1982-03-23 Precision Governors, Inc. Rotary actuator with selectable response characteristics
US4286856A (en) * 1980-02-11 1981-09-01 Mcgrath Neal Electromagnetic shutter for lens
FR2487098A1 (en) * 1980-07-18 1982-01-22 Vandeputte Fils & Cie DEVICE FOR VISUALIZING DATA
JPS57109926A (en) * 1980-12-27 1982-07-08 Canon Inc Control method for travel characteristic of electromagnetic drive shutter
JPS6068524U (en) * 1983-10-14 1985-05-15 キヤノン株式会社 Shutter electromagnetic drive device
JPH0664281B2 (en) * 1985-12-03 1994-08-22 ウエスト電気株式会社 Driving device for lens barrel and diaphragm shutter
US4881093A (en) * 1988-04-21 1989-11-14 Eastman Kodak Company Electromagnetic shutter apparatus
US5523815A (en) * 1993-05-18 1996-06-04 Konica Corporation Light amount control unit
US5561486A (en) * 1994-09-29 1996-10-01 Eastman Kodak Company Assembly for use in electromagnetic actuator
DE10204460A1 (en) * 2002-02-05 2003-08-07 Bosch Gmbh Robert rotary magnet
US20050053519A1 (en) * 2003-09-10 2005-03-10 Smith Jack V. Delta cup
US20090245780A1 (en) * 2008-03-27 2009-10-01 Kun-Feng Chiang Shutter device
EP3288158A4 (en) * 2015-04-21 2018-10-17 Elgamil, Mohamed Ahmed High-torque electromagnetic torque motors with limited rotation angle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671863A (en) * 1951-01-24 1954-03-09 Milwaukee Gas Specialty Co Electromagnetic control device
US2856831A (en) * 1953-09-16 1958-10-21 Robert C Gipe High speed light beam shutter mechanism
US3221191A (en) * 1962-09-12 1965-11-30 Daco Instr Company Inc Angular displacement solenoid
US3229170A (en) * 1963-08-01 1966-01-11 Genevieve I Magnuson Rotary solenoid
US3229171A (en) * 1963-08-12 1966-01-11 Genevieve I Magnuson Rotary solenoid with improved air gaps and stop members

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584247A1 (en) * 1985-06-27 1987-01-02 Bosch Gmbh Robert ROTATING INDUCTOR OF AN ELECTRICAL SERVOMOTOR EQUIPPED WITH CORNER-SHAPED POLAR PIECES

Also Published As

Publication number Publication date
DE1589914A1 (en) 1970-05-14
US3638550A (en) 1972-02-01

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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