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AU502946B2 - Proximity alarm - Google Patents

Proximity alarm

Info

Publication number
AU502946B2
AU502946B2 AU15703/76A AU1570376A AU502946B2 AU 502946 B2 AU502946 B2 AU 502946B2 AU 15703/76 A AU15703/76 A AU 15703/76A AU 1570376 A AU1570376 A AU 1570376A AU 502946 B2 AU502946 B2 AU 502946B2
Authority
AU
Australia
Prior art keywords
proximity alarm
alarm
proximity
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
AU15703/76A
Other versions
AU1570376A (en
Inventor
Rm. Simmonds C. W Jepperson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crane Products Manufacturing Co Inc
Original Assignee
Crane Products Manufacturing Co Inc
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 Crane Products Manufacturing Co Inc filed Critical Crane Products Manufacturing Co Inc
Priority to AU15703/76A priority Critical patent/AU502946B2/en
Publication of AU1570376A publication Critical patent/AU1570376A/en
Application granted granted Critical
Publication of AU502946B2 publication Critical patent/AU502946B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B66C15/06—Arrangements or use of warning devices
    • B66C15/065—Arrangements or use of warning devices electrical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/12—Measuring electrostatic fields or voltage-potential
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
AU15703/76A 1976-07-08 1976-07-08 Proximity alarm Expired AU502946B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15703/76A AU502946B2 (en) 1976-07-08 1976-07-08 Proximity alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU15703/76A AU502946B2 (en) 1976-07-08 1976-07-08 Proximity alarm

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU31359/71A Division AU474202B2 (en) 1971-04-19 1971-07-19 Proximity alarm

Publications (2)

Publication Number Publication Date
AU1570376A AU1570376A (en) 1976-09-23
AU502946B2 true AU502946B2 (en) 1979-08-16

Family

ID=3705744

Family Applications (1)

Application Number Title Priority Date Filing Date
AU15703/76A Expired AU502946B2 (en) 1976-07-08 1976-07-08 Proximity alarm

Country Status (1)

Country Link
AU (1) AU502946B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134943A1 (en) * 1983-07-25 1985-03-27 Hydro-Quebec System and method for detecting proximity to electrical power lines
WO1986006041A1 (en) * 1985-04-12 1986-10-23 Kevin John Walker Identification means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134943A1 (en) * 1983-07-25 1985-03-27 Hydro-Quebec System and method for detecting proximity to electrical power lines
WO1986006041A1 (en) * 1985-04-12 1986-10-23 Kevin John Walker Identification means

Also Published As

Publication number Publication date
AU1570376A (en) 1976-09-23

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