GB514905A - Improvements in or relating to telephone instruments - Google Patents

Improvements in or relating to telephone instruments

Info

Publication number
GB514905A
GB514905A GB1483538A GB1483538A GB514905A GB 514905 A GB514905 A GB 514905A GB 1483538 A GB1483538 A GB 1483538A GB 1483538 A GB1483538 A GB 1483538A GB 514905 A GB514905 A GB 514905A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone
telephone instruments
hand
microphone
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
GB1483538A
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.)
Ass Telephone & Telegraph Co
Original Assignee
Ass Telephone & Telegraph Co
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 Ass Telephone & Telegraph Co filed Critical Ass Telephone & Telegraph Co
Priority to GB219316X priority Critical
Publication of GB514905A publication Critical patent/GB514905A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/03Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Abstract

514,905. Telephone sets. POLLAK, J. E. (Associated Telephone & Telegraph Co.). May 18, 1938, No. 14835. [Class 40 (iv)] . A telephone hand-set is provided with a socket whereby a throat-operated microphone 6 may be plugged in and supported on the hand set in addition to the ordinary microphone 2, which may be automatically disconnected.
GB1483538A 1938-05-18 1938-05-18 Improvements in or relating to telephone instruments Expired GB514905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB219316X 1938-05-18

Publications (1)

Publication Number Publication Date
GB514905A true GB514905A (en) 1939-11-21

Family

ID=10171212

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1483538A Expired GB514905A (en) 1938-05-18 1938-05-18 Improvements in or relating to telephone instruments

Country Status (5)

Country Link
US (1) US2245835A (en)
BE (1) BE434077A (en)
CH (1) CH219316A (en)
FR (1) FR854285A (en)
GB (1) GB514905A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624808A (en) * 1949-03-30 1953-01-06 Nat Pneumatic Co Inc Signaling switch device
US3277243A (en) * 1962-12-19 1966-10-04 Burroughs Corp Telephone adapter
WO1986001059A1 (en) * 1984-07-24 1986-02-13 Fujitsu Limited Device for unlocking a telephone provided with a mute function
CA2554046A1 (en) * 2004-02-20 2005-09-01 Temco Japan Co., Ltd. Bone-conduction handset

Also Published As

Publication number Publication date
BE434077A (en)
FR854285A (en) 1940-04-09
CH219316A (en) 1942-01-31
US2245835A (en) 1941-06-17

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