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GB543384A - Mercury switches - Google Patents

Mercury switches

Info

Publication number
GB543384A
GB543384A GB7497/41A GB749741A GB543384A GB 543384 A GB543384 A GB 543384A GB 7497/41 A GB7497/41 A GB 7497/41A GB 749741 A GB749741 A GB 749741A GB 543384 A GB543384 A GB 543384A
Authority
GB
United Kingdom
Prior art keywords
tube
mercury
june
oscillation
switches
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
GB7497/41A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB543384A publication Critical patent/GB543384A/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
    • H01H29/26—Switches having at least one liquid contact with level of surface of contact liquid displaced by centrifugal action

Landscapes

  • Circuit Breakers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

543,384. Mercury switches; electromagnetic switches. STANDARD TELEPHONES & CABLES, Ltd. June 13, 1941, No. 7497. Convention date, June 15, 1940. [Class 38 (v)] When the tube 22 is oscillated about the vertical axis 37, mercury or other conducting liquid 36 in the horizontal portion of the tube is moved by centrifugal force past a constriction 35 to unite with a globule of mercury 39 and complete a circuit between conductors 37, 38. When the oscillation ceases, surface tension causes the mercury column to separate into its original two parts. A duct 40, into which mercury cannot enter, extends the length of the tube and facilitates the passage of gas from one part of the tube to the other. The oscillation of the tube may be produced by alternating current of suitable frequency passing through a coil of wire fixed to the vertical portion of the tube 22 and movable in a fixed magnetic field, the frequency, being regulatable by varying the tension of a wire by which the tube is suspended.
GB7497/41A 1940-06-15 1941-06-13 Mercury switches Expired GB543384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US340664A US2259953A (en) 1940-06-15 1940-06-15 Switching device

Publications (1)

Publication Number Publication Date
GB543384A true GB543384A (en) 1942-02-23

Family

ID=23334416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7497/41A Expired GB543384A (en) 1940-06-15 1941-06-13 Mercury switches

Country Status (2)

Country Link
US (1) US2259953A (en)
GB (1) GB543384A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849562A (en) * 1953-08-06 1958-08-26 Peter V N Heller Acceleration responsive switch
US2864920A (en) * 1954-10-20 1958-12-16 George Trad High speed switch mechanism

Also Published As

Publication number Publication date
US2259953A (en) 1941-10-21

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