GB765508A - Improvements in or relating to radio receiving apparatus - Google Patents

Improvements in or relating to radio receiving apparatus

Info

Publication number
GB765508A
GB765508A GB551/55A GB55155A GB765508A GB 765508 A GB765508 A GB 765508A GB 551/55 A GB551/55 A GB 551/55A GB 55155 A GB55155 A GB 55155A GB 765508 A GB765508 A GB 765508A
Authority
GB
United Kingdom
Prior art keywords
relaxation oscillator
receiving apparatus
radio receiving
jan
oscillation
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
GB551/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB765508A publication Critical patent/GB765508A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

765,508. Radio receiving apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Jan. 7, 1955 [Jan 11, 1954], No. 551/55. Class 40(5) A radio receiver provided with apparatus to enable it to function as an alarm clock comprises clock operated contacts 13 and a neon tube relaxation oscillator so arranged with respect to the receiver circuit that on closure of the contact 13 an alarm signal is reproduced in the loudspeaker 5. The circuit generating the alarm signal comprises a first neon tube relaxation oscillator 6, 8 having a frequency of oscillation of approximately 3 c/s and a second relaxation oscillator 7, 9 having a frequency of oscillation of approximately 0.4 c/s so that an interrupted pulse train as shown in Fig. 2 is generated.
GB551/55A 1954-01-11 1955-01-07 Improvements in or relating to radio receiving apparatus Expired GB765508A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL765508X 1954-01-11

Publications (1)

Publication Number Publication Date
GB765508A true GB765508A (en) 1957-01-09

Family

ID=19827604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB551/55A Expired GB765508A (en) 1954-01-11 1955-01-07 Improvements in or relating to radio receiving apparatus

Country Status (1)

Country Link
GB (1) GB765508A (en)

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