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GB620215A - Improvements in and relating to fire alarms using an electric circuit - Google Patents

Improvements in and relating to fire alarms using an electric circuit

Info

Publication number
GB620215A
GB620215A GB73247A GB73247A GB620215A GB 620215 A GB620215 A GB 620215A GB 73247 A GB73247 A GB 73247A GB 73247 A GB73247 A GB 73247A GB 620215 A GB620215 A GB 620215A
Authority
GB
United Kingdom
Prior art keywords
strip
relating
electric circuit
fire alarms
temperature rises
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
GB73247A
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.)
HARRY SINCLAIR
Original Assignee
HARRY SINCLAIR
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 HARRY SINCLAIR filed Critical HARRY SINCLAIR
Priority to GB73247A priority Critical patent/GB620215A/en
Publication of GB620215A publication Critical patent/GB620215A/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

620,215. Thermal switches. SINCLAIR, H., and MURPHY, G. C. Jan. 9. 1947, No. 732. [Class 38(v)] A switch for a fire-alarm comprises two bimetallic strips 11. 13 carrying contacts 14, 15 in the form of mutually-perpendicular ribs and preloaded by screws 16, 17. As the temperature rises both strips deflect toward a stop 10 which arrests the strip 11 whereby the strip 13 overtakes it and the contacts 14, 15 engage to close an alarm circuit connected to terminals 6, 7. If the temperature rises quickly, the strip 13 deflects more rapidly than the strip 11 which has an insulating covering 12, and the alarm circuit is closed sooner.
GB73247A 1947-01-09 1947-01-09 Improvements in and relating to fire alarms using an electric circuit Expired GB620215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB73247A GB620215A (en) 1947-01-09 1947-01-09 Improvements in and relating to fire alarms using an electric circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB73247A GB620215A (en) 1947-01-09 1947-01-09 Improvements in and relating to fire alarms using an electric circuit

Publications (1)

Publication Number Publication Date
GB620215A true GB620215A (en) 1949-03-22

Family

ID=9709561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB73247A Expired GB620215A (en) 1947-01-09 1947-01-09 Improvements in and relating to fire alarms using an electric circuit

Country Status (1)

Country Link
GB (1) GB620215A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061699A (en) * 1959-03-16 1962-10-30 Texas Instruments Inc Thermostatic switch
US3193650A (en) * 1962-02-26 1965-07-06 King Seeley Thermos Co Condition responsive switch with weld breaking means
CN112054411A (en) * 2020-08-20 2020-12-08 湖南斯德克智能科技有限公司 Circuit breaker protection box with intelligent monitoring function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061699A (en) * 1959-03-16 1962-10-30 Texas Instruments Inc Thermostatic switch
US3193650A (en) * 1962-02-26 1965-07-06 King Seeley Thermos Co Condition responsive switch with weld breaking means
CN112054411A (en) * 2020-08-20 2020-12-08 湖南斯德克智能科技有限公司 Circuit breaker protection box with intelligent monitoring function

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