GB698695A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

Publication number
GB698695A
GB698695A GB846/51A GB84651A GB698695A GB 698695 A GB698695 A GB 698695A GB 846/51 A GB846/51 A GB 846/51A GB 84651 A GB84651 A GB 84651A GB 698695 A GB698695 A GB 698695A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
vibration
microphones
magnet
moving
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
GB846/51A
Inventor
George Raoul Pontzen
Robert Richard Clark
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.)
LUSTRAPHONE Ltd
Original Assignee
LUSTRAPHONE 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 LUSTRAPHONE Ltd filed Critical LUSTRAPHONE Ltd
Priority to GB846/51A priority Critical patent/GB698695A/en
Priority to US254567A priority patent/US2778882A/en
Publication of GB698695A publication Critical patent/GB698695A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Abstract

698,695. Microphones. LUSTRAPHONE, Ltd. Oct. 29, 1951 [Jan. 11, 1951], No. 846/51. Drawings to Specification. Class 40 (iv). In a moving-coil microphone either the control part only or the periphery only of the diaphragm is rigidly supported, both faces of the diaphragm being substantially freely accessible to the surrounding air around substantially the whole peripheral extent of that part of the diaphragm which is free to vibrate and the diaphragm has at least one aperture within the area of the moving coil supported from the diaphragm. This arrangement is stated to be such that sound waves from a relatively. distant source cause substantially no vibration of the diaphragm whereas those from a relatively close source do cause vibration of the diaphragm. The upper periphery of the magnet adjacent the lower edge of the diaphragm is recessed to ensure free access of air to the diaphragm. In the peripherally-mounted embodiment the clamping-rings which support the diaphragm are secured to pillars on the magnet. U.S.A. Specification 2,350,010 is referred to.
GB846/51A 1951-01-11 1951-01-11 Improvements in or relating to microphones Expired GB698695A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB846/51A GB698695A (en) 1951-01-11 1951-01-11 Improvements in or relating to microphones
US254567A US2778882A (en) 1951-01-11 1951-11-02 Microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB846/51A GB698695A (en) 1951-01-11 1951-01-11 Improvements in or relating to microphones

Publications (1)

Publication Number Publication Date
GB698695A true GB698695A (en) 1953-10-21

Family

ID=9711475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB846/51A Expired GB698695A (en) 1951-01-11 1951-01-11 Improvements in or relating to microphones

Country Status (2)

Country Link
US (1) US2778882A (en)
GB (1) GB698695A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149254A (en) * 1961-08-07 1964-09-15 Thomas A Carter Linear motor or generator
NL291745A (en) * 1962-04-27
DE1223421B (en) * 1962-07-31 1966-08-25 Dr Wolfgang Felix Ewald speaker
DE1201876B (en) * 1963-04-11 1965-09-30 Alexander Wiesbauer Centering and holding device for loudspeaker membranes, in particular flat membranes
US4757548A (en) * 1985-12-02 1988-07-12 Fenner Jr Thomas C Speaker system and dome-shaped enclosure therefor
US4843628A (en) * 1986-07-10 1989-06-27 Stanton Magnetics, Inc. Inertial microphone/receiver with extended frequency response
US5473700A (en) * 1993-11-24 1995-12-05 Fenner, Jr.; Thomas C. High gain acoustic transducer
US9363587B2 (en) * 2013-12-05 2016-06-07 Apple Inc. Pressure vent for speaker or microphone modules

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR556412A (en) * 1923-05-09 1923-07-20 Const Electr De Lyon Et Du Dau Improvements to speaker phones
FR607912A (en) * 1924-12-13 1926-07-12 Thomson Houston Comp Francaise Improvements to sound transmitters and receivers
BE357157A (en) * 1927-04-22
DE599424C (en) * 1930-02-28 1934-07-02 Telefunken Gmbh Electrodynamic telephone or microphone
DE679439C (en) * 1935-04-10 1939-08-05 Pertrix Chem Fab Akt Ges Cone loudspeaker with electrodynamic drive system
US2238741A (en) * 1938-02-22 1941-04-15 Gen Electric Electrodynamic transducer
US2293078A (en) * 1939-12-05 1942-08-18 B A Proctor Company Inc Microphone
NL67077C (en) * 1945-12-03
US2537253A (en) * 1946-08-20 1951-01-09 Chris S Andersen Electrodynamic telephone receiver
FR936121A (en) * 1946-11-15 1948-07-09 Loudspeaker enhancements
BE496097A (en) * 1949-06-04

Also Published As

Publication number Publication date
US2778882A (en) 1957-01-22

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