GB623970A - Improvements relating to frequency-responsive electric relays - Google Patents

Improvements relating to frequency-responsive electric relays

Info

Publication number
GB623970A
GB623970A GB1535947A GB1535947A GB623970A GB 623970 A GB623970 A GB 623970A GB 1535947 A GB1535947 A GB 1535947A GB 1535947 A GB1535947 A GB 1535947A GB 623970 A GB623970 A GB 623970A
Authority
GB
United Kingdom
Prior art keywords
frequency
winding
increases
improvements relating
responsive electric
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
GB1535947A
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.)
RALPH FREDERIC GILBERT HAMILTO
Lucas Support Services Ltd
Original Assignee
RALPH FREDERIC GILBERT HAMILTO
Rotax 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 RALPH FREDERIC GILBERT HAMILTO, Rotax Ltd filed Critical RALPH FREDERIC GILBERT HAMILTO
Priority to GB1535947A priority Critical patent/GB623970A/en
Publication of GB623970A publication Critical patent/GB623970A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/30—Electromagnetic relays specially adapted for actuation by ac
    • H01H51/32—Frequency relays; Mechanically-tuned relays

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

623,970. Electromagnetic relays. ROTAX Ltd., and HAMILTON, R. F. G. June 11. 1947, No. 15359. '[Class 38(v)] A frequency-responsive relay has two windings 7, 8 acting in opposition and respectively connected through rectifiers 9. 10 to two resonant circuits 2, 4 and 1, 3 which are arranged in parallel and are turned to different frequencies. The terminals 5, 6 are connected to a variable speed A.C. dynamo so that as the speed, and therefore the frequency, increases, one winder, say 7, will reach its maximum current first and will overpower the other winding 8. As the frequency continues to increase, the current in winding 7 will decrease, while that in winding 8 increases on its way to its maximum, till eventually winding 8. As the frequency continues this particular frequency, the polarized armature 11 moves to the dotted position operating contacts 12. A contact 15 also cuts out a resistance 18 to prevent "hunting."
GB1535947A 1947-06-11 1947-06-11 Improvements relating to frequency-responsive electric relays Expired GB623970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1535947A GB623970A (en) 1947-06-11 1947-06-11 Improvements relating to frequency-responsive electric relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1535947A GB623970A (en) 1947-06-11 1947-06-11 Improvements relating to frequency-responsive electric relays

Publications (1)

Publication Number Publication Date
GB623970A true GB623970A (en) 1949-05-25

Family

ID=10057776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1535947A Expired GB623970A (en) 1947-06-11 1947-06-11 Improvements relating to frequency-responsive electric relays

Country Status (1)

Country Link
GB (1) GB623970A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755417A (en) * 1952-05-24 1956-07-17 Molyneux And Aspinwall Inc Electrical null point control system
DE950393C (en) * 1952-03-29 1956-10-11 Saia A G AC relay with damping body
US2931521A (en) * 1957-05-02 1960-04-05 Hartley Controls Corp Level control using alternating current through material of variable resistance
US2950420A (en) * 1955-03-07 1960-08-23 Bendix Corp Apparatus for controlling the position of a displaceable member to indicate the speed of an engine within predetermined ranges
US2998551A (en) * 1958-07-24 1961-08-29 Automatic Switch Co Frequency-responsive relay system
US3025676A (en) * 1960-01-04 1962-03-20 Mcculloch Corp Multiple engine speed control
US3144590A (en) * 1958-06-13 1964-08-11 Westinghouse Electric Corp Frequency selective networks
US3159768A (en) * 1959-12-16 1964-12-01 Texas Instruments Inc Thermal responsive circuit breaking relay
US3172017A (en) * 1961-06-19 1965-03-02 Automatic Switch Co Frequency-responsive relay system
US3196319A (en) * 1957-02-18 1965-07-20 Bausch & Lomb Relay actuator circuit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950393C (en) * 1952-03-29 1956-10-11 Saia A G AC relay with damping body
US2755417A (en) * 1952-05-24 1956-07-17 Molyneux And Aspinwall Inc Electrical null point control system
US2950420A (en) * 1955-03-07 1960-08-23 Bendix Corp Apparatus for controlling the position of a displaceable member to indicate the speed of an engine within predetermined ranges
US3196319A (en) * 1957-02-18 1965-07-20 Bausch & Lomb Relay actuator circuit
US2931521A (en) * 1957-05-02 1960-04-05 Hartley Controls Corp Level control using alternating current through material of variable resistance
US3144590A (en) * 1958-06-13 1964-08-11 Westinghouse Electric Corp Frequency selective networks
US2998551A (en) * 1958-07-24 1961-08-29 Automatic Switch Co Frequency-responsive relay system
US3159768A (en) * 1959-12-16 1964-12-01 Texas Instruments Inc Thermal responsive circuit breaking relay
US3025676A (en) * 1960-01-04 1962-03-20 Mcculloch Corp Multiple engine speed control
US3172017A (en) * 1961-06-19 1965-03-02 Automatic Switch Co Frequency-responsive relay system

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