GB525421A - Improvements in or relating to electrical relay devices - Google Patents

Improvements in or relating to electrical relay devices

Info

Publication number
GB525421A
GB525421A GB564739A GB564739A GB525421A GB 525421 A GB525421 A GB 525421A GB 564739 A GB564739 A GB 564739A GB 564739 A GB564739 A GB 564739A GB 525421 A GB525421 A GB 525421A
Authority
GB
United Kingdom
Prior art keywords
coil
strips
frequency
contact
tension
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
GB564739A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB564739A priority Critical patent/GB525421A/en
Publication of GB525421A publication Critical patent/GB525421A/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)
  • Magnetic Treatment Devices (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

525,421. Electromagnetic relays. GALL. D. C. Feb. 20, 1939, No. 5647. [Class 38 (v)] A sensitive A.C. relay which responds to a particular frequency' of current comprises a light coil 3 carrying the alternating current and suspended in the field of a powerful magnet 2 by strips 4, 4<1> the tension of which can be adjusted so that the natural frequency of vibration of the coil equals the desired frequency of A.C. response. When alternating current of this frequency traverses the coil, the coil oscillates and when the oscillations are of sufficient magnitude a contact 8 fixed to the coil is brought into engagement with a fixed contact 9 thereby closing a secondary D.C. circuit which serves to retain the coil in the contact making position. The tension of the strips 4, 4<1> may be adjusted by a screw 7. In modifications, one or both of the strips 4, 4<1> may be replaced by two strips arranged at an angle. Reference has been directed by the Comptroller to Specification 526,239.
GB564739A 1939-02-20 1939-02-20 Improvements in or relating to electrical relay devices Expired GB525421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB564739A GB525421A (en) 1939-02-20 1939-02-20 Improvements in or relating to electrical relay devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB564739A GB525421A (en) 1939-02-20 1939-02-20 Improvements in or relating to electrical relay devices

Publications (1)

Publication Number Publication Date
GB525421A true GB525421A (en) 1940-08-28

Family

ID=9799998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB564739A Expired GB525421A (en) 1939-02-20 1939-02-20 Improvements in or relating to electrical relay devices

Country Status (1)

Country Link
GB (1) GB525421A (en)

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