GB1144575A - Improvements relating to electromagnetic vibratory devices - Google Patents

Improvements relating to electromagnetic vibratory devices

Info

Publication number
GB1144575A
GB1144575A GB17065/66A GB1706566A GB1144575A GB 1144575 A GB1144575 A GB 1144575A GB 17065/66 A GB17065/66 A GB 17065/66A GB 1706566 A GB1706566 A GB 1706566A GB 1144575 A GB1144575 A GB 1144575A
Authority
GB
United Kingdom
Prior art keywords
armature
coil
polepieces
air gap
improvements relating
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
GB17065/66A
Inventor
Ranjit Dasgupta
Mysorf Somasekhara R Jayasimha
Krishnappa Sitaramarao
Rangaiyer Yegnanarayan
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.)
INDIAN TELEPHONE IND Ltd
Original Assignee
INDIAN TELEPHONE IND 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 INDIAN TELEPHONE IND Ltd filed Critical INDIAN TELEPHONE IND Ltd
Publication of GB1144575A publication Critical patent/GB1144575A/en
Expired 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
    • H04R11/00—Transducers of moving-armature or moving-core type
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

1,144,575. Sound transducing devices. INDIAN TELEPHONE INDUSTRIES Ltd. 19 April, 1966, No. 17065/66. Heading H4J. An electromagnetic receiver or other transducer (Fig. 2) comprises two polepieces 1, 1<SP>1</SP>, preferably L-shaped, having a permanent magnet 2 at one end and terminating at their other ends in an air gap 7, 7<SP>1</SP>. At least one coil 8 is provided. An armature 18 (Fig. 3) is pivotally mounted by torsion arms 4, 4<SP>1</SP> and one end passes through the air gap 7, 7<SP>1</SP>. Its other end has arms 5, 5<SP>1</SP>, 6<SP>1</SP> bent over to face portions of the polepieces 1, 1<SP>1</SP> and thereby provide a low reluctance path for A.C. flux. If a single coil 8 is used the armature 18 passes through a central rectangular aperture 17 of the coil 8. Alternatively two coils are provided (not shown), connected in series aiding relationship, one around each polepiece. The armature 18 has an extension 11 connected by a pin 12 to a diaphragm 13 mounted on a base 9.
GB17065/66A 1966-04-19 1966-04-19 Improvements relating to electromagnetic vibratory devices Expired GB1144575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54362566A 1966-04-19 1966-04-19

Publications (1)

Publication Number Publication Date
GB1144575A true GB1144575A (en) 1969-03-05

Family

ID=24168833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17065/66A Expired GB1144575A (en) 1966-04-19 1966-04-19 Improvements relating to electromagnetic vibratory devices

Country Status (2)

Country Link
US (1) US3436568A (en)
GB (1) GB1144575A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454425A (en) * 1943-12-23 1948-11-23 Shure Bros Magnetic translating device
US2432424A (en) * 1944-08-21 1947-12-09 Control Instr Co Inc Electromagnetic sound translating device
FR963909A (en) * 1947-06-06 1950-07-26
US2657374A (en) * 1949-11-02 1953-10-27 Gulf Research Development Co Suspension system for seismograph detectors
US2912523A (en) * 1955-10-26 1959-11-10 Industrial Res Prod Inc Electro-acoustic transducer

Also Published As

Publication number Publication date
US3436568A (en) 1969-04-01

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