GB507305A - Improvements in electric systems for controlling the tuning of radio receiving apparatus - Google Patents

Improvements in electric systems for controlling the tuning of radio receiving apparatus

Info

Publication number
GB507305A
GB507305A GB37459/38A GB3745938A GB507305A GB 507305 A GB507305 A GB 507305A GB 37459/38 A GB37459/38 A GB 37459/38A GB 3745938 A GB3745938 A GB 3745938A GB 507305 A GB507305 A GB 507305A
Authority
GB
United Kingdom
Prior art keywords
motor
feeler
disc
switches
contacts
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
GB37459/38A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB507305A publication Critical patent/GB507305A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1481—Control of position or direction using feedback using an analogue comparing device with discrete position sensor
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/14—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by auxiliary power
    • H03J5/146—Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

507,305. Electric control systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Dec. 23, 1938, No. 37459. Convention date, Dec. 28, 1937. [Class 40 (i)] In a motor - controlled tuning system for wireless receivers of the type wherein the position of the tuning device is controlled by profiled discs corresponding to the different stations and adapted to control switches for arresting the motor in different positions, each disc controls two switches, one or other of which is operated to drive the motor in opposite directions and both are operated to stop the motor when the tuning device is positioned correctly. Fig. 2 shows the circuit arrangement corresppnding to one station disc 2. The disc has two cam surfaces 3, 4 which co-operate with a feeler 5 on a spring contact 13. When the surface 4 engages the feeler 5, contacts 13, 14 are closed so that upon depression of the station key 9 the exciting winding 11 of the motor is energized to drive the disc 2 clockwise until when the feeler 5 is released by the step 12, contacts 14, 15 are closed before contacts 13, 14 are opened and the fields 10, 11 are simultaneously energized and thereby neutralized to stop the motor. Similar operations occur in the anticlockwise direction upon operation of the key G when the feeler 15 engages the surface 3. One or more choking coils 16 are provided to prevent short-circuiting of the motor in its stopping position. In a modification, the switches 13, 14, 15 operate relays which control the exciting windings of the motor.
GB37459/38A 1937-12-29 1938-12-23 Improvements in electric systems for controlling the tuning of radio receiving apparatus Expired GB507305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937N0041484 DE686190C (en) 1937-12-29 1937-12-29 certain stations can be tuned automatically by means of a motor

Publications (1)

Publication Number Publication Date
GB507305A true GB507305A (en) 1939-06-13

Family

ID=5791858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37459/38A Expired GB507305A (en) 1937-12-29 1938-12-23 Improvements in electric systems for controlling the tuning of radio receiving apparatus

Country Status (6)

Country Link
US (1) US2251054A (en)
BE (1) BE431868A (en)
CH (1) CH206319A (en)
DE (1) DE686190C (en)
FR (1) FR848058A (en)
GB (1) GB507305A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2720619A (en) * 1949-01-11 1955-10-11 Northrop Aircraft Inc Automatic resetting positioning control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454832A (en) * 1946-02-20 1948-11-30 Charles L Paulus Electric servo
DE1158614B (en) * 1957-05-01 1963-12-05 Gen Electric Locking switch with motor drive
US3493745A (en) * 1966-06-16 1970-02-03 Picker Corp Apparatus for preventing collision between two electrically conductive and relatively movable servo-controlled elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2720619A (en) * 1949-01-11 1955-10-11 Northrop Aircraft Inc Automatic resetting positioning control

Also Published As

Publication number Publication date
CH206319A (en) 1939-07-31
US2251054A (en) 1941-07-29
BE431868A (en) 1939-01-31
FR848058A (en) 1939-10-23
DE686190C (en) 1940-01-04

Similar Documents

Publication Publication Date Title
US2345778A (en) Remote motor control
GB507305A (en) Improvements in electric systems for controlling the tuning of radio receiving apparatus
US2515944A (en) Remotely controlled accurate positioning system
US2118944A (en) Control mechanism
GB531187A (en) Control systems for radio receivers or other electric wave apparatus
US2698888A (en) Control system and receiver therefor
US2742599A (en) Shaft positioning device
US2044607A (en) Selector mechanism for automatic tuning
GB532860A (en) Improvements in the tuning mechanism of radio receivers
US2565649A (en) Direction-responsive control arrangement for reversible motors
US2719927A (en) Electrical control systems and control devices therefor
US2453251A (en) Motor-operated push-button tuner
GB1453079A (en) Mechanical actuator having presettable positions
US2553951A (en) Positioning mechanism
US2245804A (en) Tuning mechanism for radio apparatus
GB501370A (en) Improvements in or relating to tuning devices for radio receivers
GB1406994A (en) Indicator drive for automatic rotator
GB517420A (en) Improvements in or relating to radio receivers
GB523881A (en) Improvements in or relating to radio-receiving apparatus
GB354691A (en) Improvements in or relating to selector systems
GB497774A (en) Improvements relating to the tuning of radio receivers
US2161890A (en) Timed wired radio receiver
GB520410A (en) Improvements in or relating to electrical motor operated switching arrangements
GB511503A (en) Improvements relating to the tuning of radio receivers
GB515292A (en) Improvements in electric control apparatus for tuning radio receivers