GB2221796B - Electromagnetic devices - Google Patents

Electromagnetic devices

Info

Publication number
GB2221796B
GB2221796B GB8818882A GB8818882A GB2221796B GB 2221796 B GB2221796 B GB 2221796B GB 8818882 A GB8818882 A GB 8818882A GB 8818882 A GB8818882 A GB 8818882A GB 2221796 B GB2221796 B GB 2221796B
Authority
GB
United Kingdom
Prior art keywords
electromagnetic devices
electromagnetic
devices
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
GB8818882A
Other versions
GB2221796A (en
GB8818882D0 (en
Inventor
James Walter Gearing
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.)
Gearing & Watson
Original Assignee
Gearing & Watson
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 Gearing & Watson filed Critical Gearing & Watson
Priority to GB8818882A priority Critical patent/GB2221796B/en
Publication of GB8818882D0 publication Critical patent/GB8818882D0/en
Publication of GB2221796A publication Critical patent/GB2221796A/en
Application granted granted Critical
Publication of GB2221796B publication Critical patent/GB2221796B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • 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
    • H01F7/066—Electromagnets with movable winding
GB8818882A 1988-08-09 1988-08-09 Electromagnetic devices Expired - Lifetime GB2221796B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8818882A GB2221796B (en) 1988-08-09 1988-08-09 Electromagnetic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8818882A GB2221796B (en) 1988-08-09 1988-08-09 Electromagnetic devices

Publications (3)

Publication Number Publication Date
GB8818882D0 GB8818882D0 (en) 1988-09-14
GB2221796A GB2221796A (en) 1990-02-14
GB2221796B true GB2221796B (en) 1992-01-08

Family

ID=10641829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8818882A Expired - Lifetime GB2221796B (en) 1988-08-09 1988-08-09 Electromagnetic devices

Country Status (1)

Country Link
GB (1) GB2221796B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1004325B (en) * 2000-07-03 2003-09-05 Electroacoustic tranducer with field replaceable diaphragm crrying two interlaced coils
GB2500718A (en) * 2012-03-30 2013-10-02 Paul Raymond Knight Edge- or circumferentially driven planar loudspeaker with Neodymium magnet system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536918A (en) * 1975-08-28 1978-12-29 Minnesota Mining & Mfg Piston loudspeaker
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536918A (en) * 1975-08-28 1978-12-29 Minnesota Mining & Mfg Piston loudspeaker
US4327257A (en) * 1979-09-10 1982-04-27 Schwartz Leslie H Alignment device for electro-acoustical transducers

Also Published As

Publication number Publication date
GB2221796A (en) 1990-02-14
GB8818882D0 (en) 1988-09-14

Similar Documents

Publication Publication Date Title
EP0361670A3 (en) Electromagnetic actuator
GB8824961D0 (en) Electromagnetic devices
GB8718720D0 (en) Electromagnetic device
IL78573A0 (en) Electromagnetic device
GB8922579D0 (en) Control devices
GB8917559D0 (en) Magnetic devices
EP0428745A4 (en) Electromagnetic vibrator
GB9005159D0 (en) Container-loading devices
GB8807647D0 (en) Computational devices
GB2236998B (en) Non-refill devices
GB2221796B (en) Electromagnetic devices
GB8826253D0 (en) Improvements in electromagnetic devices
GB8923698D0 (en) Non-refilling devices
GB2192097B (en) Electromagnetic devices
GB8814773D0 (en) Electromagnetic components
HUH3400A (en) Electromagnetic pressure-intensifying device
GB2216941B (en) Connection devices
ZA887935B (en) Electromagnetic devices
GB9000006D0 (en) Magnetic devices
GB2187854B (en) Electromagnetic device
IL80173A0 (en) Electromagnetic devices
IL78863A0 (en) Electromagnetic devices
GB2216826B (en) Retaining devices
GB8816097D0 (en) Microwave devices
GB8807025D0 (en) Devices

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20080808