IL29843A - Intruder detecting apparatus - Google Patents

Intruder detecting apparatus

Info

Publication number
IL29843A
IL29843A IL29843A IL2984368A IL29843A IL 29843 A IL29843 A IL 29843A IL 29843 A IL29843 A IL 29843A IL 2984368 A IL2984368 A IL 2984368A IL 29843 A IL29843 A IL 29843A
Authority
IL
Israel
Prior art keywords
fluid
transducers
diaphragm
interrogating
tubes
Prior art date
Application number
IL29843A
Other languages
English (en)
Other versions
IL29843A0 (en
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.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of IL29843A0 publication Critical patent/IL29843A0/xx
Publication of IL29843A publication Critical patent/IL29843A/en

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)
  • Emergency Alarm Devices (AREA)
  • Burglar Alarm Systems (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)
IL29843A 1967-08-24 1968-04-17 Intruder detecting apparatus IL29843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66301367A 1967-08-24 1967-08-24

Publications (2)

Publication Number Publication Date
IL29843A0 IL29843A0 (en) 1970-01-29
IL29843A true IL29843A (en) 1971-07-28

Family

ID=24660152

Family Applications (1)

Application Number Title Priority Date Filing Date
IL29843A IL29843A (en) 1967-08-24 1968-04-17 Intruder detecting apparatus

Country Status (4)

Country Link
BE (1) BE714066A (xx)
FR (1) FR1576035A (xx)
GB (1) GB1185265A (xx)
IL (1) IL29843A (xx)

Families Citing this family (2)

* 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
NL7208873A (xx) * 1972-06-28 1974-01-02

Also Published As

Publication number Publication date
DE1766574A1 (de) 1971-02-11
DE1766574B2 (de) 1976-01-29
BE714066A (xx) 1968-09-16
IL29843A0 (en) 1970-01-29
FR1576035A (xx) 1969-07-25
GB1185265A (en) 1970-03-25

Similar Documents

Publication Publication Date Title
US3438021A (en) Perimeter intrusion alarm
US4107660A (en) Intrusion detection system
US3986182A (en) Multi-zone intrusion detection system
US7005993B2 (en) Sensor apparatus and method for detecting earthquake generated P-waves and generating a responsive control signal
US5821425A (en) Remote sensing of structural integrity using a surface acoustic wave sensor
US6731210B2 (en) System and method for detecting, localizing, or classifying a disturbance using a waveguide sensor system
EP0031989B1 (en) Shear wave acoustic well logging tool
US3109165A (en) Intruder detecting system
CN105122021B (zh) 声传感器
US4459689A (en) Multiple zone object detection system
US3846780A (en) Intrusion detection system
US5021766A (en) Intrusion detection system
US5049858A (en) Intrusion detection system
JPS6016000B2 (ja) 音響伝導媒体の監視方法
EP0027738A2 (en) Intrusion alarm system
JPS61501230A (ja) 侵入報知器のための試験装置
US4038632A (en) Oil and gas well disaster valve control system
US3961321A (en) Omnidirectional ultrasonic intrusion surveillance unit
US5428984A (en) Self test apparatus for ultrasonic sensor
US3956731A (en) Detection apparatus for structural failure in aircraft employing piezoelectric transducers
GB1402530A (en) Detecting damage to glass
IL29843A (en) Intruder detecting apparatus
US3753260A (en) Pulse reflection test means for balanced pressure surveillance detector
US3631439A (en) Pressure-sensitive security apparatus
GB2124763A (en) Alarm system