GB138548A - Improvements in fire detectors - Google Patents

Improvements in fire detectors

Info

Publication number
GB138548A
GB138548A GB1721719A GB1721719A GB138548A GB 138548 A GB138548 A GB 138548A GB 1721719 A GB1721719 A GB 1721719A GB 1721719 A GB1721719 A GB 1721719A GB 138548 A GB138548 A GB 138548A
Authority
GB
United Kingdom
Prior art keywords
lever
plate
strip
contact
pin
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
GB1721719A
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.)
SPARDON ELECTRICAL PRODUCTS CO
Original Assignee
SPARDON ELECTRICAL PRODUCTS CO
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 SPARDON ELECTRICAL PRODUCTS CO filed Critical SPARDON ELECTRICAL PRODUCTS CO
Priority to GB1721719A priority Critical patent/GB138548A/en
Publication of GB138548A publication Critical patent/GB138548A/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)
  • Fire-Detection Mechanisms (AREA)

Abstract

138,548. Marks, E. C. R., (Spardon Electrical Products Co.). July 9, 1919. Alarms operated by expansion of solids.-In an electric fire-alarm of the type in which a curved bimetallic strip operates a contact-making lever, the lever makes contact with a stud adapted to be attached directly to the base-plate in adjustable positions. On a base A of insulating material is mounted a plate 10 and a circular expansible strip B secured at one end to the plate 10 by a block 11. The free end of the strip B is engaged by the free end of a lever C, which extends through the end of the strip B and has sliding contact therewith, the end of the lever being hookshaped. The lever C is pivoted centrally by means of a bushing or sleeve 12 journaled in the plate 10, and is adapted to make contact with a pin D, which is adjustable in a series of holes 16 having a temperature scale associated therewith. One terminal of the device is connected to the pin D, and the other terminal to the plate 10 and thence to the lever C.
GB1721719A 1919-07-09 1919-07-09 Improvements in fire detectors Expired GB138548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1721719A GB138548A (en) 1919-07-09 1919-07-09 Improvements in fire detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1721719A GB138548A (en) 1919-07-09 1919-07-09 Improvements in fire detectors

Publications (1)

Publication Number Publication Date
GB138548A true GB138548A (en) 1920-02-12

Family

ID=10091276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1721719A Expired GB138548A (en) 1919-07-09 1919-07-09 Improvements in fire detectors

Country Status (1)

Country Link
GB (1) GB138548A (en)

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