GB160243A - Improvements in or relating to telephones - Google Patents

Improvements in or relating to telephones

Info

Publication number
GB160243A
GB160243A GB3126819A GB3126819A GB160243A GB 160243 A GB160243 A GB 160243A GB 3126819 A GB3126819 A GB 3126819A GB 3126819 A GB3126819 A GB 3126819A GB 160243 A GB160243 A GB 160243A
Authority
GB
United Kingdom
Prior art keywords
instruments
receiver
telephone
chin
transmitter
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
GB3126819A
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.)
Telephone Manufacturing Co Ltd
Original Assignee
Telephone Manufacturing Co 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 Telephone Manufacturing Co Ltd filed Critical Telephone Manufacturing Co Ltd
Priority to GB3126819A priority Critical patent/GB160243A/en
Priority to FR517393D priority patent/FR517393A/en
Priority to DET24389D priority patent/DE403333C/en
Publication of GB160243A publication Critical patent/GB160243A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

160,243. Murray, R. L., and Telephone Manufacturing Co., Ltd. Dec. 13, 1919. Head and breast sets; magnetic instruments; receivers; microphones; direct-call systems. - A telephone instrument comprising a receiver combined in one casing with a transmitter, which is strapped against the user's throat, is designed to avoid " howling." A chin-operated switch is provided. The instruments are joined in shunt directly to line, with a common battery connected in series in such a way as to strengthen the permanent magnets. In a diver's telephone. Fig. 2, the transmitter and receiver are mounted back to back and separated by a solid bottom A<4> which, together with the shunt arrangement referred to, prevents reaction between the two instruments. In the receiver, one pole of the magnet consists of a ring F concentric with a core which constitutes the other pole and carries the bobbin G<1>. The diaphragm communicates with the ears through air-passages in a connector K and flexible tubes. The microphone is provided with a switch which can be closed by depressing the push H<1> with the chin. The microphone diaphragm rests against a loose ring C<2> inside the cup C<1>. A strap enables the combination to be fastened round the neck. A one-way ringing circuit comprising a direct-current bell may be provided.
GB3126819A 1919-12-13 1919-12-13 Improvements in or relating to telephones Expired GB160243A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3126819A GB160243A (en) 1919-12-13 1919-12-13 Improvements in or relating to telephones
FR517393D FR517393A (en) 1919-12-13 1920-06-17 Phone enhancements
DET24389D DE403333C (en) 1919-12-13 1920-09-09 Microphone with microphone influenced by the speaker's larynx

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3126819A GB160243A (en) 1919-12-13 1919-12-13 Improvements in or relating to telephones

Publications (1)

Publication Number Publication Date
GB160243A true GB160243A (en) 1921-03-14

Family

ID=10320564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3126819A Expired GB160243A (en) 1919-12-13 1919-12-13 Improvements in or relating to telephones

Country Status (3)

Country Link
DE (1) DE403333C (en)
FR (1) FR517393A (en)
GB (1) GB160243A (en)

Also Published As

Publication number Publication date
DE403333C (en) 1924-09-27
FR517393A (en) 1921-05-04

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