GB152761A - Telephone transmitter - Google Patents

Telephone transmitter

Info

Publication number
GB152761A
GB152761A GB1803419A GB1803419A GB152761A GB 152761 A GB152761 A GB 152761A GB 1803419 A GB1803419 A GB 1803419A GB 1803419 A GB1803419 A GB 1803419A GB 152761 A GB152761 A GB 152761A
Authority
GB
United Kingdom
Prior art keywords
casing
electrode
head
transmitter
secured
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
GB1803419A
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US228311A external-priority patent/US1329029A/en
Application filed by Individual filed Critical Individual
Priority to GB1803419A priority Critical patent/GB152761A/en
Publication of GB152761A publication Critical patent/GB152761A/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
    • H04M1/04—Supports for telephone transmitters or receivers
    • H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

152,761. Timmons, J. S. July 18, 1919. Microphones and variable-resistance transmitters; head-sets.-A transmitter for use in noisy places is completely enclosed in a sound-proof casing and is operated by the muscular action of the operator when talking. The diaphragm is loaded to increase the inertia of the movable electrode, while the other electrode is rigidly connected to the casing. The cord is gripped by a tapered threaded gland, and one conductor is connected to the fixed electrode by soldering it to the casing. The receivers are enclosed in rubber caps mounted upon a helmet or head-band to which the strap carrying the transmitter is secured. The terminals of the head-set are connected to a plug coupling. Transmitter. A casing 2, Fig. 3, is provided with web-loops 4 and 5, a hollow chamber 6 containing the microphone, a threaded cover 7, and a tapered threaded gland 22, 23 through which the cord 21 passes. A metal disk 9 is placed between the carbon electrode 11 and the casing 2, and is held in position by a bush 10 which is insulated from the granules 20 by means of a paper lining 12. A diaphragm 13 is held between the bush 10 and a retaining ring 14 and carries an electrode 19 secured to a metal disk 15 provided with a thread shank 16. A weight 18 is secured to the diaphragm 13 by the shank 16 and a nut 17, thereby increasing the inertia of the movable electrode. Head set. The receivers R are enclosed in rubber caps r mounted upon a bead-band 26 or a helmet to which a strap 27 carrying the transmitter T is secured. The conductors of the head set are connected to one of the elements 30 of a plug coupling 30, 31.
GB1803419A 1918-04-13 1919-07-18 Telephone transmitter Expired GB152761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1803419A GB152761A (en) 1918-04-13 1919-07-18 Telephone transmitter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US228311A US1329029A (en) 1918-04-13 1918-04-13 Telephone apparatus
GB1803419A GB152761A (en) 1918-04-13 1919-07-18 Telephone transmitter

Publications (1)

Publication Number Publication Date
GB152761A true GB152761A (en) 1920-10-18

Family

ID=26253076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1803419A Expired GB152761A (en) 1918-04-13 1919-07-18 Telephone transmitter

Country Status (1)

Country Link
GB (1) GB152761A (en)

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