GB498468A - Improved method of and apparatus for the transmission of speech and other sounds - Google Patents

Improved method of and apparatus for the transmission of speech and other sounds

Info

Publication number
GB498468A
GB498468A GB18572/37A GB1857237A GB498468A GB 498468 A GB498468 A GB 498468A GB 18572/37 A GB18572/37 A GB 18572/37A GB 1857237 A GB1857237 A GB 1857237A GB 498468 A GB498468 A GB 498468A
Authority
GB
United Kingdom
Prior art keywords
pick
coil
sounds
speech
transmission
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
GB18572/37A
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10114752&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB498468(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to GB18572/37A priority Critical patent/GB498468A/en
Priority to US216816A priority patent/US2252641A/en
Publication of GB498468A publication Critical patent/GB498468A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

498,468. Inductive telephony. POLIAKOFF, J., and SNEATH, O. B. July 5, 1937, No. 18572. Drawings to Specification. [Class 40 (iv)] [Also in Group XL] Speech and other sounds are transmitted throughout a limited space such as an auditorium, particularly for deaf-aid purposes, by means of audio-frequency induction between a conducting loop system fed from a low frequency amplifier and a pick-up coil energizing a portable receiver. The pick-up coil is screened against electrostatic induction by slotted metallic discs. A carbon or condenser microphone may be connected in place of the pick-up coil for direct reception of sound, or a combination of the two inputs may be obtained by suitable switches or potentiometers. Radio receiving apparatus modified by incorporating therein a suitable pick-up coil connected for example to the gramophone pick-up terminals may be employed to receive the signals. The pick-up coil may be of large dimensions and low resistance and connected to the set through a suitable step-up transformer and may be placed at a distance from the set to avoid picking up mains hum.
GB18572/37A 1937-07-05 1937-07-05 Improved method of and apparatus for the transmission of speech and other sounds Expired GB498468A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18572/37A GB498468A (en) 1937-07-05 1937-07-05 Improved method of and apparatus for the transmission of speech and other sounds
US216816A US2252641A (en) 1937-07-05 1938-06-30 Method of and apparatus for the transmission of speech and other sounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18572/37A GB498468A (en) 1937-07-05 1937-07-05 Improved method of and apparatus for the transmission of speech and other sounds

Publications (1)

Publication Number Publication Date
GB498468A true GB498468A (en) 1939-01-05

Family

ID=10114752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18572/37A Expired GB498468A (en) 1937-07-05 1937-07-05 Improved method of and apparatus for the transmission of speech and other sounds

Country Status (2)

Country Link
US (1) US2252641A (en)
GB (1) GB498468A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419833A (en) * 1945-12-12 1947-04-29 Harlan E Grimes Antenna arrangement for induction communication systems
US2567431A (en) * 1947-05-05 1951-09-11 William S Halstead Communications system of restricted-range type
US2628275A (en) * 1948-02-25 1953-02-10 Louis W Parker Radio and television distribution system for hotels and apartment houses
BE506590A (en) * 1949-07-27
US2721896A (en) * 1949-07-27 1955-10-25 Foot Victor Albert Sound-reproducing systems
US2853557A (en) * 1955-01-28 1958-09-23 Dictograph Products Co Inc Sound distribution system
DE1038116B (en) * 1956-03-13 1958-09-04 Siemens Ag Conductor loop for inductive reception with hearing aids or the like.
US3162726A (en) * 1958-07-14 1964-12-22 Roseberg Audio systems for drive-in theatres
US3673334A (en) * 1971-03-19 1972-06-27 Educational Service Programs I Antenna for use with an audio induction communication system
US4016553A (en) * 1975-06-27 1977-04-05 Knogo Corporation Article detection system with near field electromagnetic wave control
US4135184A (en) * 1977-08-31 1979-01-16 Knogo Corporation Electronic theft detection system for monitoring wide passageways
US4908869A (en) * 1989-05-09 1990-03-13 Norman Lederman Induction-based assistive listening system

Also Published As

Publication number Publication date
US2252641A (en) 1941-08-12

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