GB536091A - Improvements in mercury switches of temperature control devices for furnaces and the like - Google Patents

Improvements in mercury switches of temperature control devices for furnaces and the like

Info

Publication number
GB536091A
GB536091A GB2230239A GB2230239A GB536091A GB 536091 A GB536091 A GB 536091A GB 2230239 A GB2230239 A GB 2230239A GB 2230239 A GB2230239 A GB 2230239A GB 536091 A GB536091 A GB 536091A
Authority
GB
United Kingdom
Prior art keywords
mercury
furnaces
temperature control
control devices
adjustable
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
GB2230239A
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
Priority to GB2230239A priority Critical patent/GB536091A/en
Publication of GB536091A publication Critical patent/GB536091A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts

Landscapes

  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

536,091. Mercury switches. FREEMAN, N. H. Aug. 1, 1939, No. 22302. [Class 38 (v)] In a device for controlling the temperature of a furnace, in which expansion of fluid such as air in a phial a displaces mercury in an adjustable tube d. into engagement with a contact j a liquid such as a hydrocarbon is placed above the mercury to prevent oxidation. The tube d is adjustable about a pivot g and communicates with the phial a through a passage c. The liquid hydrocarbon is supplied by .a reservoir t. The contact j is adjustable by rotating a threaded rod o. The device is provided with a liquid seal safety valve x as in Specification 175,024, [Class 38 (v)]
GB2230239A 1939-08-01 1939-08-01 Improvements in mercury switches of temperature control devices for furnaces and the like Expired GB536091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2230239A GB536091A (en) 1939-08-01 1939-08-01 Improvements in mercury switches of temperature control devices for furnaces and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2230239A GB536091A (en) 1939-08-01 1939-08-01 Improvements in mercury switches of temperature control devices for furnaces and the like

Publications (1)

Publication Number Publication Date
GB536091A true GB536091A (en) 1941-05-02

Family

ID=10177182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2230239A Expired GB536091A (en) 1939-08-01 1939-08-01 Improvements in mercury switches of temperature control devices for furnaces and the like

Country Status (1)

Country Link
GB (1) GB536091A (en)

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