CA995349A - Carbon microphone - Google Patents

Carbon microphone

Info

Publication number
CA995349A
CA995349A CA186,005A CA186005A CA995349A CA 995349 A CA995349 A CA 995349A CA 186005 A CA186005 A CA 186005A CA 995349 A CA995349 A CA 995349A
Authority
CA
Canada
Prior art keywords
carbon microphone
microphone
carbon
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
CA186,005A
Other languages
English (en)
Other versions
CA186005S (en
Inventor
Henley F. Sterling
William D. Cragg
Anthony N. Lawson
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of CA995349A publication Critical patent/CA995349A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Telephone Set Structure (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
CA186,005A 1972-11-24 1973-11-16 Carbon microphone Expired CA995349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5431472A GB1360559A (en) 1972-11-24 1972-11-24 Carbon microphone

Publications (1)

Publication Number Publication Date
CA995349A true CA995349A (en) 1976-08-17

Family

ID=10470609

Family Applications (1)

Application Number Title Priority Date Filing Date
CA186,005A Expired CA995349A (en) 1972-11-24 1973-11-16 Carbon microphone

Country Status (15)

Country Link
US (1) US3859478A (enrdf_load_stackoverflow)
JP (1) JPS4984430A (enrdf_load_stackoverflow)
AR (1) AR199010A1 (enrdf_load_stackoverflow)
AT (1) ATA982873A (enrdf_load_stackoverflow)
AU (1) AU6192973A (enrdf_load_stackoverflow)
BE (1) BE807626A (enrdf_load_stackoverflow)
BR (1) BR7308746D0 (enrdf_load_stackoverflow)
CA (1) CA995349A (enrdf_load_stackoverflow)
CH (1) CH558626A (enrdf_load_stackoverflow)
DE (1) DE2358243A1 (enrdf_load_stackoverflow)
ES (1) ES420820A1 (enrdf_load_stackoverflow)
FR (1) FR2208266B3 (enrdf_load_stackoverflow)
GB (1) GB1360559A (enrdf_load_stackoverflow)
IT (1) IT1001915B (enrdf_load_stackoverflow)
NL (1) NL7315631A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541570A (en) * 1994-12-09 1996-07-30 Force Imaging Technologies, Inc. Force sensing ink, method of making same and improved force sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US486244A (en) * 1892-11-15 Charles clamond
US919908A (en) * 1908-07-13 1909-04-27 Harold Sheen Martin Electrical-resistance device.
US1086726A (en) * 1909-03-11 1914-02-10 Johan Burchardt Opsahl Resistance unit.

Also Published As

Publication number Publication date
AR199010A1 (es) 1974-07-31
GB1360559A (en) 1974-07-17
ES420820A1 (es) 1976-04-01
IT1001915B (it) 1976-04-30
ATA982873A (de) 1976-05-15
FR2208266B3 (enrdf_load_stackoverflow) 1976-10-08
NL7315631A (enrdf_load_stackoverflow) 1974-05-28
BR7308746D0 (pt) 1974-08-22
AU6192973A (en) 1975-05-01
FR2208266A1 (enrdf_load_stackoverflow) 1974-06-21
US3859478A (en) 1975-01-07
CH558626A (de) 1975-01-31
BE807626A (nl) 1974-05-22
JPS4984430A (enrdf_load_stackoverflow) 1974-08-14
DE2358243A1 (de) 1974-05-30

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