FR581478A - Improvements to fire alarm systems - Google Patents

Improvements to fire alarm systems

Info

Publication number
FR581478A
FR581478A FR581478DA FR581478A FR 581478 A FR581478 A FR 581478A FR 581478D A FR581478D A FR 581478DA FR 581478 A FR581478 A FR 581478A
Authority
FR
France
Prior art keywords
fire alarm
alarm systems
systems
fire
alarm
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
Other languages
French (fr)
Inventor
Edmond Half
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 filed Critical
Application granted granted Critical
Publication of FR581478A publication Critical patent/FR581478A/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
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/10—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature
    • G01K3/12—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of time, e.g. reacting only to a quick change of temperature based upon expansion or contraction of materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR581478D 1924-05-10 1924-05-10 Improvements to fire alarm systems Expired FR581478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR581478T 1924-05-10

Publications (1)

Publication Number Publication Date
FR581478A true FR581478A (en) 1924-11-29

Family

ID=8957445

Family Applications (1)

Application Number Title Priority Date Filing Date
FR581478D Expired FR581478A (en) 1924-05-10 1924-05-10 Improvements to fire alarm systems

Country Status (1)

Country Link
FR (1) FR581478A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809248A (en) * 1954-03-04 1957-10-08 James F Tapp Oil filter signalling means
US2853880A (en) * 1954-03-10 1958-09-30 Westinghouse Electric Corp Absolute pressure sensing device
US3174007A (en) * 1962-03-12 1965-03-16 Paul B Sagar Gas pressure actuated switch with calibration means
US3300769A (en) * 1964-11-03 1967-01-24 Future Products Tool Corp Oil deficiency indicator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809248A (en) * 1954-03-04 1957-10-08 James F Tapp Oil filter signalling means
US2853880A (en) * 1954-03-10 1958-09-30 Westinghouse Electric Corp Absolute pressure sensing device
US3174007A (en) * 1962-03-12 1965-03-16 Paul B Sagar Gas pressure actuated switch with calibration means
US3300769A (en) * 1964-11-03 1967-01-24 Future Products Tool Corp Oil deficiency indicator

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