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GB559097A - Improvements in or relating to means for use in signalling a fall or fall and rise in temperature - Google Patents

Improvements in or relating to means for use in signalling a fall or fall and rise in temperature

Info

Publication number
GB559097A
GB559097A GB1212942A GB1212942A GB559097A GB 559097 A GB559097 A GB 559097A GB 1212942 A GB1212942 A GB 1212942A GB 1212942 A GB1212942 A GB 1212942A GB 559097 A GB559097 A GB 559097A
Authority
GB
United Kingdom
Prior art keywords
temperature
contact
dial
fall
low temperature
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
GB1212942A
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 GB1212942A priority Critical patent/GB559097A/en
Publication of GB559097A publication Critical patent/GB559097A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
    • G01K5/62—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being formed of compounded strips or plates, e.g. bimetallic strip

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

559,097. Thermal switches. GRIFFITHS, G. Aug. 28, 1942, No. 12129. [Class 38 (v)] A temperature alarm switch comprises a bimetal strip secured at one end to the rear of a dial 2, the free end moving a finger 5 over a scale until it meets a further contact comprising a wire 9 fixed in and projecting through an insulating bush 10 in the dial, at an appropriate low temperature. There may also be a similar wire 11 in a bush 12 to close the alarm circuit at a higher temperature. In a modification. Fig. 4, the casing 13 is of insulating material, a low temperature alarm may be fitted, as in the previous example, but the high temperature contact is adjustable as by providing a cranked arm 25 pivoted in the dial so that its contact end may be moved to any desired temperature. Various methods of arranging so that the adjustable contact can operate as a low temperature alarm by swinging it to the other side of the indicating finger 16, are described, together with a testing push switch.
GB1212942A 1942-08-28 1942-08-28 Improvements in or relating to means for use in signalling a fall or fall and rise in temperature Expired GB559097A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1212942A GB559097A (en) 1942-08-28 1942-08-28 Improvements in or relating to means for use in signalling a fall or fall and rise in temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1212942A GB559097A (en) 1942-08-28 1942-08-28 Improvements in or relating to means for use in signalling a fall or fall and rise in temperature

Publications (1)

Publication Number Publication Date
GB559097A true GB559097A (en) 1944-02-03

Family

ID=9998886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1212942A Expired GB559097A (en) 1942-08-28 1942-08-28 Improvements in or relating to means for use in signalling a fall or fall and rise in temperature

Country Status (1)

Country Link
GB (1) GB559097A (en)

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