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GB235204A - Improvements in electric relays - Google Patents

Improvements in electric relays

Info

Publication number
GB235204A
GB235204A GB14576/25A GB1457625A GB235204A GB 235204 A GB235204 A GB 235204A GB 14576/25 A GB14576/25 A GB 14576/25A GB 1457625 A GB1457625 A GB 1457625A GB 235204 A GB235204 A GB 235204A
Authority
GB
United Kingdom
Prior art keywords
relay
particular frequency
actuated
current
alternating 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
GB14576/25A
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.)
MARIO FIACHETTI
Original Assignee
MARIO FIACHETTI
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 MARIO FIACHETTI filed Critical MARIO FIACHETTI
Publication of GB235204A publication Critical patent/GB235204A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

235,204. Fiachetti, M.' June 4, 1924, [Convention date]. Electromagnetic switches; induction relays. - An induction relay, Fig. 2, which is not affected by current of a particular frequency, but is actuated by currents of all other frequencies, has two mutually opposing windings 4, 5 tending to rotate a disc 2' in opposite directions and arranged in parallel circuits which contain respectively a capacity and inductance and a resistance. For alternating current of a particular frequency the impedances of these two circuits are equal and their effects therefore cancel each other. Specification 20869/09 is referred to. The Specification, as open to inspection under Sect. 91 (3) (a) comprises also a relay, Fig. 1, having one core on which both windings 4, 5 are wound, the relay being actuated either by direct current or by alternating current of any frequency excepting the particular frequency. This subject-matter does not appear in the Specification as accepted.
GB14576/25A 1924-06-04 1925-06-04 Improvements in electric relays Expired GB235204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE235204X 1924-06-04

Publications (1)

Publication Number Publication Date
GB235204A true GB235204A (en) 1926-09-06

Family

ID=5895650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14576/25A Expired GB235204A (en) 1924-06-04 1925-06-04 Improvements in electric relays

Country Status (1)

Country Link
GB (1) GB235204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968960A (en) * 1989-12-20 1990-11-06 Abb Power T & D Company Inc. Electromagnet relay with flux biasing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968960A (en) * 1989-12-20 1990-11-06 Abb Power T & D Company Inc. Electromagnet relay with flux biasing

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