GB418525A - Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems - Google Patents

Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems

Info

Publication number
GB418525A
GB418525A GB1465633A GB1465633A GB418525A GB 418525 A GB418525 A GB 418525A GB 1465633 A GB1465633 A GB 1465633A GB 1465633 A GB1465633 A GB 1465633A GB 418525 A GB418525 A GB 418525A
Authority
GB
United Kingdom
Prior art keywords
interruption
relay
signalling
valve
regenerative
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
GB1465633A
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.)
WIRELESS TELEPHONE Co Ltd
Original Assignee
WIRELESS TELEPHONE 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 WIRELESS TELEPHONE Co Ltd filed Critical WIRELESS TELEPHONE Co Ltd
Priority to GB1465633A priority Critical patent/GB418525A/en
Publication of GB418525A publication Critical patent/GB418525A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D11/00—Super-regenerative demodulator circuits
    • H03D11/02—Super-regenerative demodulator circuits for amplitude-modulated oscillations

Landscapes

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

Abstract

418,525. Valve circuits for wireless reception. CLOUGH, N. H., Bourneville, Walden Road, Hornchurch, Essex, and WIRELESS TELEPHONE CO., Ltd., 42, Old Broad Street, London. May 20, 1933. No. 14656. [Class 40 (v).] A relay is operated in response to interrupted high frequency oscillations by means of a super-regenerative receiver to which the relay is coupled by one or more valves. The Figure shows the relay 17 in the anode circuit of the valve 16 which is coupled to the super-regenerative detector 4, by a transformer 15 the primary of which is preferably tuned to the frequency of interruption of the signals and the valve 16. operates as an anode bend detector at the frequency of interruption. In a modification the transformer coupling is replaced by a resistance or choke capacity coupling. Additional amplifying valves may be used and regenerative coupling in the circuits before or after rectification. The interruption at the transmitter may be effected by the use of alternating current for the anode supply.
GB1465633A 1933-05-20 1933-05-20 Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems Expired GB418525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1465633A GB418525A (en) 1933-05-20 1933-05-20 Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1465633A GB418525A (en) 1933-05-20 1933-05-20 Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems

Publications (1)

Publication Number Publication Date
GB418525A true GB418525A (en) 1934-10-26

Family

ID=10045183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1465633A Expired GB418525A (en) 1933-05-20 1933-05-20 Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems

Country Status (1)

Country Link
GB (1) GB418525A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438902A (en) * 1943-10-04 1948-04-06 Standard Telephones Cables Ltd Pulse multiplex system employing fixed pulse-time displacement for signaling
US2438903A (en) * 1943-10-11 1948-04-06 Standard Telephones Cables Ltd Pulse communication system employing pulse frequency reduction for signaling
US2584132A (en) * 1944-01-04 1952-02-05 Robert A Kirkman Radio receiving system
DE1055619B (en) * 1954-07-14 1959-04-23 Pintsch Electro Gmbh Battery-operated, in particular portable radio equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438902A (en) * 1943-10-04 1948-04-06 Standard Telephones Cables Ltd Pulse multiplex system employing fixed pulse-time displacement for signaling
US2438903A (en) * 1943-10-11 1948-04-06 Standard Telephones Cables Ltd Pulse communication system employing pulse frequency reduction for signaling
US2584132A (en) * 1944-01-04 1952-02-05 Robert A Kirkman Radio receiving system
DE1055619B (en) * 1954-07-14 1959-04-23 Pintsch Electro Gmbh Battery-operated, in particular portable radio equipment

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