BE756000A - Appareil de securite perfectionne sensible a la pression - Google Patents

Appareil de securite perfectionne sensible a la pression

Info

Publication number
BE756000A
BE756000A BE756000DA BE756000A BE 756000 A BE756000 A BE 756000A BE 756000D A BE756000D A BE 756000DA BE 756000 A BE756000 A BE 756000A
Authority
BE
Belgium
Prior art keywords
pressure sensitive
safety device
sensitive safety
perfected
perfected pressure
Prior art date
Application number
Other languages
English (en)
Inventor
E W Nichols
Original Assignee
Westinghouse Electric Corp
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.)
Publication date
Publication of BE756000A publication Critical patent/BE756000A/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/20—Actuation by change of fluid pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Burglar Alarm Systems (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Geophysics And Detection Of Objects (AREA)
BE756000D 1969-09-15 Appareil de securite perfectionne sensible a la pression BE756000A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85796169A 1969-09-15 1969-09-15

Publications (1)

Publication Number Publication Date
BE756000A true BE756000A (fr) 1971-02-15

Family

ID=25327118

Family Applications (1)

Application Number Title Priority Date Filing Date
BE756000D BE756000A (fr) 1969-09-15 Appareil de securite perfectionne sensible a la pression

Country Status (7)

Country Link
US (1) US3631439A (fr)
JP (1) JPS4939021B1 (fr)
BE (1) BE756000A (fr)
DE (1) DE2040762A1 (fr)
FR (1) FR2061431A5 (fr)
GB (1) GB1272908A (fr)
IL (1) IL35287A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753260A (en) * 1971-10-04 1973-08-14 Westinghouse Electric Corp Pulse reflection test means for balanced pressure surveillance detector
US3699398A (en) * 1971-10-12 1972-10-17 Reed A Newmeyer Sensor for vehicular traffic counters
US3868667A (en) * 1972-04-06 1975-02-25 Us Army Intruder detection system embodying a bimorph transducer
AT375466B (de) * 1977-07-27 1984-08-10 List Hans Messwertaufnehmer mit einem piezoelektrischen messelement
JPS5473514U (fr) * 1977-11-04 1979-05-25
IT1111490B (it) * 1978-08-24 1986-01-13 Italcontrol Srl Perfezionamenti ad elementi di apparecchi segnalatori di intrusione in una superficie chiusa
US5089671A (en) * 1989-12-15 1992-02-18 Val Ranetkins Underwater zoom switch
US7122944B2 (en) * 2004-01-16 2006-10-17 Tangidyne Corporation Signal generation system and method for generating signals
CN104880738B (zh) * 2015-06-16 2018-04-06 中国矿业大学 模拟探测煤巷突出参数与突出的关系及规律的方法与装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986479A (en) * 1929-12-27 1935-01-01 Automatic Sprinkler Co Means for supervising pneumatic fire alarm systems
BE472235A (fr) * 1946-09-06
US2582483A (en) * 1947-03-13 1952-01-15 Theodore W Hallerberg Pressure sensitive switch
US2868300A (en) * 1954-12-31 1959-01-13 Specialties Dev Corp Explosion suppression system
BE624894A (fr) * 1962-05-03
US3307052A (en) * 1964-04-06 1967-02-28 Frank W Neilson Piezoelectric stress gage
US3438021A (en) * 1965-07-26 1969-04-08 Westinghouse Electric Corp Perimeter intrusion alarm
US3359386A (en) * 1965-10-11 1967-12-19 Howard Electric Company Sludge exclusion diaphragm switch
US3336573A (en) * 1966-09-14 1967-08-15 Texaco Inc Crystal pressure sensitive geophones for use in soft earth

Also Published As

Publication number Publication date
GB1272908A (en) 1972-05-03
IL35287A (en) 1972-12-29
US3631439A (en) 1971-12-28
FR2061431A5 (fr) 1971-06-18
JPS4939021B1 (fr) 1974-10-22
DE2040762A1 (de) 1971-04-15
IL35287A0 (en) 1970-11-30

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