GB940043A - Electric switch - Google Patents

Electric switch

Info

Publication number
GB940043A
GB940043A GB28588/61A GB2858861A GB940043A GB 940043 A GB940043 A GB 940043A GB 28588/61 A GB28588/61 A GB 28588/61A GB 2858861 A GB2858861 A GB 2858861A GB 940043 A GB940043 A GB 940043A
Authority
GB
United Kingdom
Prior art keywords
mercury
compartment
electrodes
heating element
switch
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
GB28588/61A
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
Publication of GB940043A publication Critical patent/GB940043A/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
    • H01H29/28—Switches having at least one liquid contact with level of surface of contact liquid displaced by fluid pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
    • H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
    • H01H43/307—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of gases

Abstract

940,043. Mercury switches. Y. ISHIGURO. Aug. 8, 1961 [Aug. 22, 1960], No. 28588/61. Heading H2B. A switch comprises a casing 3 formed with two gas-filled compartments 4, 5, connected by a passage 10 containing mercury 11 which is pressed down from compartment 5 when the gas therein is heated by a heating element 13 such that contact is made between electrodes 8, 9, on either side of a dam at the bottom of compartment 4, thereby completing a load circuit 1, the compartments being also connected by a gas passage 14 which in use is closed by a plug 15. Alternatively, with the heating element in the other compartment, contact between the electrodes can be broken as the mercury is pressed down on either side of the dam (Fig. 2, not shown). Heating element 13 is in a source circuit 2 controlled by a switch 5 which may be mechanical or photo-conductive in operation, and the variable resistance R controls the time needed to complete circuit 1 after switch S is closed. Electrodes 8, 9 may be bridged by a condenser (not shown) for preventing sparking as the mercury column 11 separates.
GB28588/61A 1960-08-22 1961-08-08 Electric switch Expired GB940043A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3527460 1960-08-22

Publications (1)

Publication Number Publication Date
GB940043A true GB940043A (en) 1963-10-23

Family

ID=12437192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28588/61A Expired GB940043A (en) 1960-08-22 1961-08-08 Electric switch

Country Status (2)

Country Link
US (1) US3166657A (en)
GB (1) GB940043A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009117078A (en) * 2007-11-02 2009-05-28 Yokogawa Electric Corp Relay

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1231221A (en) * 1917-05-09 1917-06-26 Knut Trosdahl Electric-current interrupter.
US1614621A (en) * 1923-07-09 1927-01-18 Ira E Mccabe Mercury-tube switch
US1674489A (en) * 1924-11-28 1928-06-19 Gen Electric Automatic switch
US1980243A (en) * 1930-12-23 1934-11-13 Himself And John Craig Harvey Electrical mercury cut-out
FR763666A (en) * 1933-11-10 1934-05-04 Radio Ind Improvements to thermo-pneumatic relays
US2046416A (en) * 1935-01-26 1936-07-07 Vapor Car Heating Co Inc Mercury column thermostat
US2978591A (en) * 1958-05-05 1961-04-04 American Electric Mfg Corp Control means for a street lighting system

Also Published As

Publication number Publication date
US3166657A (en) 1965-01-19

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