ZA728609B - Detecting damage to bulk material - Google Patents

Detecting damage to bulk material

Info

Publication number
ZA728609B
ZA728609B ZA728609A ZA728609A ZA728609B ZA 728609 B ZA728609 B ZA 728609B ZA 728609 A ZA728609 A ZA 728609A ZA 728609 A ZA728609 A ZA 728609A ZA 728609 B ZA728609 B ZA 728609B
Authority
ZA
South Africa
Prior art keywords
bulk material
detecting damage
damage
detecting
bulk
Prior art date
Application number
ZA728609A
Other languages
English (en)
Inventor
J Owens
Original Assignee
Microwave & Electronic Syst
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 Microwave & Electronic Syst filed Critical Microwave & Electronic Syst
Publication of ZA728609B publication Critical patent/ZA728609B/xx
Priority to US05/677,645 priority Critical patent/US4054867A/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
ZA728609A 1971-12-10 1972-12-05 Detecting damage to bulk material ZA728609B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/677,645 US4054867A (en) 1971-12-10 1976-04-16 Detecting damage to bulk material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5759871A GB1402530A (en) 1971-12-10 1971-12-10 Detecting damage to glass

Publications (1)

Publication Number Publication Date
ZA728609B true ZA728609B (en) 1973-08-29

Family

ID=10479560

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA728609A ZA728609B (en) 1971-12-10 1972-12-05 Detecting damage to bulk material

Country Status (6)

Country Link
JP (1) JPS563598B2 (fr)
DE (1) DE2260352C2 (fr)
FR (1) FR2162577B1 (fr)
GB (1) GB1402530A (fr)
IT (1) IT975986B (fr)
ZA (1) ZA728609B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2254540C3 (de) * 1972-11-08 1981-06-04 Wilhelm 6700 Ludwigshafen Karger Schaltungsanordnung für einen Schwingungsmelder für Ruhestrom-Alarm-Anlagen
JPS5068687U (fr) * 1973-10-26 1975-06-19
JPS50130398A (fr) * 1974-03-30 1975-10-15
JPS5879B2 (ja) * 1975-02-08 1983-01-05 株式会社富士通ゼネラル カンシソウチ
JPS51152349U (fr) * 1975-05-29 1976-12-04
JPS584397B2 (ja) * 1975-09-11 1983-01-26 株式会社富士通ゼネラル カンシソウチ
JPS5265489U (fr) * 1975-11-11 1977-05-14
US4091660A (en) * 1977-03-16 1978-05-30 Matsushita Electric Industrial Co., Ltd. Apparatus for detecting the breaking of a glass plate
DE3043912A1 (de) * 1980-11-21 1982-07-01 alfasystem GmbH Vertrieb von elektronischen Sicherheitssystemen, 8034 Germering Glasbruchmelder mit abgesetzter auswerteelektronik
DE3142705C2 (de) * 1981-10-28 1986-06-12 Securiton AG, Zollikofen, Bern Vorrichtung zur Überwachung des Zustandes eines zur Fortleitung von Schallwellen geeigneten Körpers
GB2129592B (en) * 1982-07-02 1986-09-10 Paul Coleman Motion sensor
DE9003065U1 (fr) * 1989-04-12 1990-10-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
GB2348496A (en) * 1999-03-31 2000-10-04 Frazer Nash Consultancy Ltd Method and apparatus for the detection of scratching and similar surface action to glass
CN108242122A (zh) * 2016-12-23 2018-07-03 浙江金徕镀膜有限公司 一种用于清理切磨导致破碎的玻璃的报警装置
GB2603887A (en) * 2020-11-24 2022-08-24 Novosound Ltd Tamper proof ultrasound sensor
CN113203800B (zh) * 2021-05-25 2022-11-18 江苏大学 一种用于叉指式换能器的性能标定装置及标定方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB627038A (en) * 1946-11-09 1949-07-26 Ferranti Ltd Improvements in means for detecting mechanical vibrations caused by friction
GB1186044A (en) * 1967-04-25 1970-04-02 Electronic Lab Ltd Formerly El Alarm Circuit
DE2127562B2 (de) * 1971-06-03 1979-05-23 Spirig, Ernst, Dipl.-Ing., Rapperswil (Schweiz) Vorrichtung zur Anzeige von Glasscheibenbruch

Also Published As

Publication number Publication date
AU4978572A (en) 1974-06-13
JPS563598B2 (fr) 1981-01-26
JPS4866485A (fr) 1973-09-12
FR2162577A1 (fr) 1973-07-20
DE2260352C2 (de) 1985-01-17
IT975986B (it) 1974-08-10
DE2260352A1 (de) 1973-06-28
GB1402530A (en) 1975-08-13
FR2162577B1 (fr) 1980-07-25

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