GB191208590A - An Improved Automatic Protection Device for Electric Circuits. - Google Patents

An Improved Automatic Protection Device for Electric Circuits.

Info

Publication number
GB191208590A
GB191208590A GB191208590DA GB191208590A GB 191208590 A GB191208590 A GB 191208590A GB 191208590D A GB191208590D A GB 191208590DA GB 191208590 A GB191208590 A GB 191208590A
Authority
GB
United Kingdom
Prior art keywords
circuit
line
mercury
breaker
trip
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
Inventor
Philip Michael Levy
Henry Thomas George
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
Application granted granted Critical
Publication of GB191208590A publication Critical patent/GB191208590A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/30—Switches having at least one liquid contact with level of surface of contact liquid displaced by expansion or evaporation thereof

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

8590. Levy, P. M., and George, H. T. April 11. Mercury switches; protective arrangements.- Relates to a thermally operated mercury contact protective device employed in combination with an automatic circuit-breaker to introduce a time-lag into the action of the latter by temporarily augmenting the capacity of the line when excessive current flows, and by diminishing the resistance of the trip-ooil circuit. Mercury in a vessel 2 is heated by the current flowing in a coil 5 connected in the line 6, and rises in the tube 1, making successive contacts which connect branches 10, 10<a>, 10<b>, in parallel with the line, thus increasing its capacity, and also connect resistances R<a>, R<b>, R<c> in parallel with the shunt circuit containing the trip-coil of the automatic circuit-breaker 8. The circuit of an alarm-bell 9 is also completed.
GB191208590D 1912-04-11 1912-04-11 An Improved Automatic Protection Device for Electric Circuits. Expired GB191208590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191208590T 1912-04-11

Publications (1)

Publication Number Publication Date
GB191208590A true GB191208590A (en) 1912-10-10

Family

ID=32571654

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191208590D Expired GB191208590A (en) 1912-04-11 1912-04-11 An Improved Automatic Protection Device for Electric Circuits.

Country Status (2)

Country Link
FR (1) FR456464A (en)
GB (1) GB191208590A (en)

Also Published As

Publication number Publication date
FR456464A (en) 1913-08-27

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