GB505820A - Improvements in automatic tuning arrangements for radio receivers - Google Patents

Improvements in automatic tuning arrangements for radio receivers

Info

Publication number
GB505820A
GB505820A GB28204/38A GB2820438A GB505820A GB 505820 A GB505820 A GB 505820A GB 28204/38 A GB28204/38 A GB 28204/38A GB 2820438 A GB2820438 A GB 2820438A GB 505820 A GB505820 A GB 505820A
Authority
GB
United Kingdom
Prior art keywords
motor
tuning
reactor
coils
current
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
GB28204/38A
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine Corp
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 Hazeltine Corp filed Critical Hazeltine Corp
Publication of GB505820A publication Critical patent/GB505820A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/18—Control by auxiliary power
    • H03J1/20—Control by auxiliary power the auxiliary power being switched on as long as controlling current is switched on

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Amplifiers (AREA)

Abstract

505,820. Wireless receiving circuits. HAZELTINE CORPORATION. Sept. 28, 1938, No. 28204. Convention date, Oct. 22, 1937. [Class 40 (v)] In a wireless receiver of the kind having motor-operated tuning controlled locally or remotely by means of push-buttons and wherein at least one amplifier stage is subject to A.V.C., the speed of rotation of the tuning motor is reduced in the neighbourhood of a signal of predetermined amplitude. The tuning motor M has a series field 23 and is controlled by push-buttons F, R giving forward and reverse running respectively. In series with the motor and winding 23, two coils 29, 30 of a saturabie reactor are connected across the A.C. supply 24, the central limb of the reactor having a coil 33 which carries the space currents of the valves 14, 16, 18 subject to A.V.C. voltages from 19, 20. With no signal, the current in 33 is large, the reactor is saturated and the reactance of coils 29, 30 is small; practically the full supply voltage is thus applied to motor M which runs at normal speed. As soon as a powerful station is approached the current through 33 falls sharply and the voltage applied to M is reduced with conse. quent reduction of speed. The receiver may be tuned rapidly through unwanted . stations by closing switch 40 to short-circuit coils 29, 30. In a modification, Fig. 2 (not shown), the valve space current operates a relay to insert or remove a resistance in the motor armature circuit and further . contacts on the relay mute the receiver during tuning.
GB28204/38A 1937-10-22 1938-09-28 Improvements in automatic tuning arrangements for radio receivers Expired GB505820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US170318A US2174566A (en) 1937-10-22 1937-10-22 Automatic tuning arrangement

Publications (1)

Publication Number Publication Date
GB505820A true GB505820A (en) 1939-05-17

Family

ID=22619407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28204/38A Expired GB505820A (en) 1937-10-22 1938-09-28 Improvements in automatic tuning arrangements for radio receivers

Country Status (4)

Country Link
US (1) US2174566A (en)
CH (1) CH210442A (en)
FR (1) FR844920A (en)
GB (1) GB505820A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951381C (en) * 1954-07-03 1956-10-25 Saba Gmbh Device for motorized tuning of wireless communication technology receivers

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462856A (en) * 1942-05-19 1949-03-01 Sperry Corp Transmitter and/or receiver circuits
US2470843A (en) * 1944-10-04 1949-05-24 Philco Corp Stop-on carrier tuner
US2478977A (en) * 1944-11-13 1949-08-16 Colonial Radio Corp Signal seeking receiver for frequency modulated signals
US2453252A (en) * 1944-12-05 1948-11-09 Rca Corp Tuning control mechanism for radio receivers
US2499967A (en) * 1945-10-06 1950-03-07 Colonial Radio Corp Push-button tuning signal-seeking receiver
US2619590A (en) * 1946-04-26 1952-11-25 Everard M Williams Discriminating panoramic receiver
US2574097A (en) * 1946-08-21 1951-11-06 John B Smiley Remote control for radio receivers
US2516856A (en) * 1947-04-30 1950-08-01 Farnsworth Res Corp Automatic stop-on carrier tuning system
US2584578A (en) * 1947-11-14 1952-02-05 Sylvania Electric Prod Variable delay control circuit for motor-driven signal seeking receivers
US2671168A (en) * 1948-07-14 1954-03-02 Rca Corp Automatically tuned receiver
US2632036A (en) * 1948-07-15 1953-03-17 Marcel Wallace Panoramic recorder
US2661419A (en) * 1949-04-18 1953-12-01 Marcel Wallace Wide band spectrum analyzer
US2915625A (en) * 1953-08-25 1959-12-01 Gen Electric Scan tuning receiver
US2832889A (en) * 1953-11-17 1958-04-29 Gen Motors Corp Signal seeking radio control
US2843733A (en) * 1955-05-23 1958-07-15 Sylvania Electric Prod Search receiver with traveling wave tube
US2949532A (en) * 1956-05-18 1960-08-16 Motorola Inc Stop-on-tune receiver having remote control specific channel selector
US2923814A (en) * 1956-07-18 1960-02-02 Cgs Lab Inc Static elimination system
US3131370A (en) * 1960-03-14 1964-04-28 Gen Dynamics Corp Search receiver which corrects for motor overshoot by interchange of two offset bandpass filters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951381C (en) * 1954-07-03 1956-10-25 Saba Gmbh Device for motorized tuning of wireless communication technology receivers

Also Published As

Publication number Publication date
CH210442A (en) 1940-07-15
FR844920A (en) 1939-08-04
US2174566A (en) 1939-10-03

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