GB1360559A – Carbon microphone
– Google Patents
GB1360559A – Carbon microphone
– Google Patents
Carbon microphone
Info
Publication number
GB1360559A
GB1360559A
GB5431472A
GB5431472A
GB1360559A
GB 1360559 A
GB1360559 A
GB 1360559A
GB 5431472 A
GB5431472 A
GB 5431472A
GB 5431472 A
GB5431472 A
GB 5431472A
GB 1360559 A
GB1360559 A
GB 1360559A
Authority
GB
United Kingdom
Prior art keywords
carbon
carbon microphone
particles
microphone
heading
Prior art date
1972-11-24
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
GB5431472A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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.)
1972-11-24
Filing date
1972-11-24
Publication date
1974-07-17
1972-11-24
Application filed by Standard Telephone and Cables PLC
filed
Critical
Standard Telephone and Cables PLC
1972-11-24
Priority to GB5431472A
priority
Critical
patent/GB1360559A/en
1973-09-21
Priority to US399598A
priority
patent/US3859478A/en
1973-10-29
Priority to AU61929/73A
priority
patent/AU6192973A/en
1973-11-08
Priority to BR8746/73A
priority
patent/BR7308746D0/en
1973-11-14
Priority to NL7315631A
priority
patent/NL7315631A/xx
1973-11-16
Priority to CA186,005A
priority
patent/CA995349A/en
1973-11-20
Priority to CH1640273A
priority
patent/CH558626A/en
1973-11-22
Priority to BE2053233A
priority
patent/BE807626A/en
1973-11-22
Priority to IT31620/73A
priority
patent/IT1001915B/en
1973-11-22
Priority to DE2358243A
priority
patent/DE2358243A1/en
1973-11-22
Priority to AR251115A
priority
patent/AR199010A1/en
1973-11-22
Priority to JP48130831A
priority
patent/JPS4984430A/ja
1973-11-23
Priority to AT982873A
priority
patent/ATA982873A/en
1973-11-23
Priority to FR7341721A
priority
patent/FR2208266B3/fr
1973-11-24
Priority to ES420820A
priority
patent/ES420820A1/en
1974-07-17
Publication of GB1360559A
publication
Critical
patent/GB1360559A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
Abstract
1360559 Carbon granule microphones STANDARD TELEPHONES & CABLES Ltd 24 Nov 1972 54314/72 Heading H4J A carbon microphone has a mixture of carbon granules and up to 2% of aggregated particles, forming masses 1 to 10 microns in size, of a dry powder lubricant. Preferably the particles are of silica material and constitute about 1% of the total.
GB5431472A
1972-11-24
1972-11-24
Carbon microphone
Expired
GB1360559A
(en)
Priority Applications (15)
Application Number
Priority Date
Filing Date
Title
GB5431472A
GB1360559A
(en)
1972-11-24
1972-11-24
Carbon microphone
US399598A
US3859478A
(en)
1972-11-24
1973-09-21
Carbon microphone
AU61929/73A
AU6192973A
(en)
1972-11-24
1973-10-29
Carbon microphone
BR8746/73A
BR7308746D0
(en)
1972-11-24
1973-11-08
COAL MICROPHONE
NL7315631A
NL7315631A
(en)
1972-11-24
1973-11-14
CA186,005A
CA995349A
(en)
1972-11-24
1973-11-16
Carbon microphone
CH1640273A
CH558626A
(en)
1972-11-24
1973-11-20
CHARCOAL MICROPHONE, IN PARTICULAR FOR TELEPHONE APPARATUS.
BE2053233A
BE807626A
(en)
1972-11-24
1973-11-22
CARBON MICROPHONE
IT31620/73A
IT1001915B
(en)
1972-11-24
1973-11-22
CHARCOAL MICROPHONE
DE2358243A
DE2358243A1
(en)
1972-11-24
1973-11-22
CHARCOAL MICROPHONE
AR251115A
AR199010A1
(en)
1972-11-24
1973-11-22
CARBON MICROPHONE
JP48130831A
JPS4984430A
(en)
1972-11-24
1973-11-22
AT982873A
ATA982873A
(en)
1972-11-24
1973-11-23
FULL SIZE FOR A COAL MICROPHONE
FR7341721A
FR2208266B3
(en)
1972-11-24
1973-11-23
ES420820A
ES420820A1
(en)
1972-11-24
1973-11-24
Carbon microphone
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
GB1360559A
true
GB1360559A
(en)
1974-07-17
Family
ID=10470609
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5431472A
Expired
GB1360559A
(en)
1972-11-24
1972-11-24
Carbon microphone
Country Status (15)
Country
Link
US
(1)
US3859478A
(en)
JP
(1)
JPS4984430A
(en)
AR
(1)
AR199010A1
(en)
AT
(1)
ATA982873A
(en)
AU
(1)
AU6192973A
(en)
BE
(1)
BE807626A
(en)
BR
(1)
BR7308746D0
(en)
CA
(1)
CA995349A
(en)
CH
(1)
CH558626A
(en)
DE
(1)
DE2358243A1
(en)
ES
(1)
ES420820A1
(en)
FR
(1)
FR2208266B3
(en)
GB
(1)
GB1360559A
(en)
IT
(1)
IT1001915B
(en)
NL
(1)
NL7315631A
(en)
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.
1972
1972-11-24
GB
GB5431472A
patent/GB1360559A/en
not_active
Expired
1973
1973-09-21
US
US399598A
patent/US3859478A/en
not_active
Expired – Lifetime
1973-10-29
AU
AU61929/73A
patent/AU6192973A/en
not_active
Expired
1973-11-08
BR
BR8746/73A
patent/BR7308746D0/en
unknown
1973-11-14
NL
NL7315631A
patent/NL7315631A/xx
unknown
1973-11-16
CA
CA186,005A
patent/CA995349A/en
not_active
Expired
1973-11-20
CH
CH1640273A
patent/CH558626A/en
not_active
IP Right Cessation
1973-11-22
IT
IT31620/73A
patent/IT1001915B/en
active
1973-11-22
BE
BE2053233A
patent/BE807626A/en
unknown
1973-11-22
AR
AR251115A
patent/AR199010A1/en
active
1973-11-22
DE
DE2358243A
patent/DE2358243A1/en
active
Pending
1973-11-22
JP
JP48130831A
patent/JPS4984430A/ja
active
Pending
1973-11-23
FR
FR7341721A
patent/FR2208266B3/fr
not_active
Expired
1973-11-23
AT
AT982873A
patent/ATA982873A/en
not_active
Application Discontinuation
1973-11-24
ES
ES420820A
patent/ES420820A1/en
not_active
Expired
Also Published As
Publication number
Publication date
BR7308746D0
(en)
1974-08-22
FR2208266A1
(en)
1974-06-21
BE807626A
(en)
1974-05-22
AU6192973A
(en)
1975-05-01
CH558626A
(en)
1975-01-31
CA995349A
(en)
1976-08-17
US3859478A
(en)
1975-01-07
AR199010A1
(en)
1974-07-31
JPS4984430A
(en)
1974-08-14
ATA982873A
(en)
1976-05-15
IT1001915B
(en)
1976-04-30
DE2358243A1
(en)
1974-05-30
ES420820A1
(en)
1976-04-01
FR2208266B3
(en)
1976-10-08
NL7315631A
(en)
1974-05-28
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Legal Events
Date
Code
Title
Description
1974-11-06
414F
Notice of opposition given (sect. 14/1949)
1975-04-23
414E
Application relinquished (sect. 14/1949)
1975-08-06
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
