GB549480A - Improvements in mobile apparatus for receiving radio signals - Google Patents

Improvements in mobile apparatus for receiving radio signals

Info

Publication number
GB549480A
GB549480A GB1291141A GB1291141A GB549480A GB 549480 A GB549480 A GB 549480A GB 1291141 A GB1291141 A GB 1291141A GB 1291141 A GB1291141 A GB 1291141A GB 549480 A GB549480 A GB 549480A
Authority
GB
United Kingdom
Prior art keywords
filter
receiver
contacts
unmute
audio frequency
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
GB1291141A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1291141A priority Critical patent/GB549480A/en
Publication of GB549480A publication Critical patent/GB549480A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

549,480. Wireless receiving systems. GENERAL ELECTRIC CO., Ltd,. BLIGH, N. R., HELLER, D. M., and STENNING, L. C. Oct. 6, 1941,No. 12911. [Class 40 (y)] A receiver adapted for use on a police car has a loudspeaker 1 which is normally muted by having connected in series with it a filter 3 tuned to a narrow band of audio frequency. On receipt of a calling signal of this frequency part of the output of the filter is rectified at 4 and operates relay A to close its hold on circuit at a1 and to short circuit the filter at a2 to unmute the receiver. The receiver remains unmuted until the operator momentarily opens contacts 6. Momentary closure of contacts 7 serves to unmute the receiver at any time, while opening contacts 8 prevents operation of relay A and so allows reception of a morse signal on the audio frequency band passed by the filter.
GB1291141A 1941-10-06 1941-10-06 Improvements in mobile apparatus for receiving radio signals Expired GB549480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1291141A GB549480A (en) 1941-10-06 1941-10-06 Improvements in mobile apparatus for receiving radio signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1291141A GB549480A (en) 1941-10-06 1941-10-06 Improvements in mobile apparatus for receiving radio signals

Publications (1)

Publication Number Publication Date
GB549480A true GB549480A (en) 1942-11-23

Family

ID=10013387

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1291141A Expired GB549480A (en) 1941-10-06 1941-10-06 Improvements in mobile apparatus for receiving radio signals

Country Status (1)

Country Link
GB (1) GB549480A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945039C (en) * 1948-10-02 1956-06-28 Siemens Ag Arrangement for switching on receiving devices in groups at the transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945039C (en) * 1948-10-02 1956-06-28 Siemens Ag Arrangement for switching on receiving devices in groups at the transmitter

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