JPS4939021B1 - - Google Patents

Info

Publication number
JPS4939021B1
JPS4939021B1 JP45080087A JP8008770A JPS4939021B1 JP S4939021 B1 JPS4939021 B1 JP S4939021B1 JP 45080087 A JP45080087 A JP 45080087A JP 8008770 A JP8008770 A JP 8008770A JP S4939021 B1 JPS4939021 B1 JP S4939021B1
Authority
JP
Japan
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.)
Pending
Application number
JP45080087A
Other languages
Japanese (ja)
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
Publication of JPS4939021B1 publication Critical patent/JPS4939021B1/ja
Pending legal-status Critical Current

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)
  • Burglar Alarm Systems (AREA)
  • Measuring Fluid Pressure (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Geophysics And Detection Of Objects (AREA)
JP45080087A 1969-09-15 1970-09-14 Pending JPS4939021B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
JPS4939021B1 true JPS4939021B1 (enrdf_load_stackoverflow) 1974-10-22

Family

ID=25327118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP45080087A Pending JPS4939021B1 (enrdf_load_stackoverflow) 1969-09-15 1970-09-14

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473514U (enrdf_load_stackoverflow) * 1977-11-04 1979-05-25

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
IT1111490B (it) * 1978-08-24 1986-01-13 Italcontrol Srl Perfezionamenti ad elementi di apparecchi segnalatori di intrusione in una superficie chiusa
USD318646S (en) 1988-12-30 1991-07-30 Honeywell Inc. Differential pressure transducer
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 (enrdf_load_stackoverflow) * 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 (enrdf_load_stackoverflow) * 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473514U (enrdf_load_stackoverflow) * 1977-11-04 1979-05-25

Also Published As

Publication number Publication date
IL35287A0 (en) 1970-11-30
GB1272908A (en) 1972-05-03
DE2040762A1 (de) 1971-04-15
US3631439A (en) 1971-12-28
IL35287A (en) 1972-12-29
FR2061431A5 (enrdf_load_stackoverflow) 1971-06-18
BE756000A (fr) 1971-02-15

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