GB560972A - Improvements relating to electro-magnetic alternating current apparatus - Google Patents

Improvements relating to electro-magnetic alternating current apparatus

Info

Publication number
GB560972A
GB560972A GB1809742A GB1809742A GB560972A GB 560972 A GB560972 A GB 560972A GB 1809742 A GB1809742 A GB 1809742A GB 1809742 A GB1809742 A GB 1809742A GB 560972 A GB560972 A GB 560972A
Authority
GB
United Kingdom
Prior art keywords
alternating current
electro
improvements relating
magnetic alternating
current apparatus
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
GB1809742A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB1809742A priority Critical patent/GB560972A/en
Publication of GB560972A publication Critical patent/GB560972A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/223—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil adapted to be supplied by AC

Landscapes

  • Ac-Ac Conversion (AREA)

Abstract

560,972. Automatic regulation. FERRANTI, Ltd., and NORRIS, E. D. T. Dec. 21, 1942, No. 18097. [Class 38 (iv] The voltage across an electromagnetic apparatus, for example a voltage regulating relay as described in Specification 465,058, is caused to rise with increase of the frequency of the current source, and vice versa, in order to render its excitation current independent of small frequency changes. The apparatus is connected in parallel'with a condenser whereby the combined impedance is capacitative at all relevant frequencies and the combination is connected to the source of alternating current through an impedance which is resonant at the normal frequency and consists of an inductance in series with a condenser. The invention is applicable to solenoids, chokes, and other electromagnetic apparatus.
GB1809742A 1942-12-21 1942-12-21 Improvements relating to electro-magnetic alternating current apparatus Expired GB560972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1809742A GB560972A (en) 1942-12-21 1942-12-21 Improvements relating to electro-magnetic alternating current apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1809742A GB560972A (en) 1942-12-21 1942-12-21 Improvements relating to electro-magnetic alternating current apparatus

Publications (1)

Publication Number Publication Date
GB560972A true GB560972A (en) 1944-04-28

Family

ID=10106602

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1809742A Expired GB560972A (en) 1942-12-21 1942-12-21 Improvements relating to electro-magnetic alternating current apparatus

Country Status (1)

Country Link
GB (1) GB560972A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195857B (en) * 1963-04-25 1965-07-01 Siemens Ag Device for monitoring the temperature, in particular the windings of electrical machines and devices, using PTC thermistors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195857B (en) * 1963-04-25 1965-07-01 Siemens Ag Device for monitoring the temperature, in particular the windings of electrical machines and devices, using PTC thermistors

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