GB1367642A - Proximity alarm system - Google Patents

Proximity alarm system

Info

Publication number
GB1367642A
GB1367642A GB1220174A GB1220174A GB1367642A GB 1367642 A GB1367642 A GB 1367642A GB 1220174 A GB1220174 A GB 1220174A GB 1220174 A GB1220174 A GB 1220174A GB 1367642 A GB1367642 A GB 1367642A
Authority
GB
United Kingdom
Prior art keywords
antenna
alarm system
proximity alarm
heading
april
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
GB1220174A
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
Publication of GB1367642A publication Critical patent/GB1367642A/en
Expired 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
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold

Abstract

1367642 Proximity detectors CRANE PRODUCTS MFG CO Inc 1 Aug 1971 [19 April 1971] 12201/74 Heading G1N The subject-matter of this Specification is substantially the same as that described in Specification 1367641 but the claims are concerned with a system which gives a warning when an object enters an electrostatic field comprising an antenna, means for controlling the sensitivity of the antenna, an amplifier and an oscillator operable in response to the amplified induced signal to provide an alarm signal, the system also including a power supply voltage regulator and specified testing facilities.
GB1220174A 1971-04-19 1971-07-01 Proximity alarm system Expired GB1367642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13534771A 1971-04-19 1971-04-19

Publications (1)

Publication Number Publication Date
GB1367642A true GB1367642A (en) 1974-09-18

Family

ID=22467692

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3083471A Expired GB1367641A (en) 1971-04-19 1971-07-01 Proximity alarm control device
GB1220174A Expired GB1367642A (en) 1971-04-19 1971-07-01 Proximity alarm system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3083471A Expired GB1367641A (en) 1971-04-19 1971-07-01 Proximity alarm control device

Country Status (8)

Country Link
US (1) US3745549A (en)
JP (1) JPS53152587U (en)
AU (1) AU474202B2 (en)
CA (1) CA963553A (en)
DE (1) DE2137893C3 (en)
FR (1) FR2134977A5 (en)
GB (2) GB1367641A (en)
NL (1) NL7111829A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6853307B2 (en) 2002-03-14 2005-02-08 Irvin H. Nickerson High voltage proximity warning system and method

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362992A (en) * 1978-01-30 1982-12-07 Sperry Limited System and method of detecting the proximity of an alternating magnetic field
US4727447A (en) * 1982-12-20 1988-02-23 Texaco Inc. Safety system and method
US4683464A (en) * 1983-06-30 1987-07-28 Texaco Inc. Safety monitor means and method
US4649375A (en) * 1985-10-31 1987-03-10 Fmc Corporation Apparatus for detecting power lines
FR2608781B1 (en) * 1986-12-17 1989-03-03 Thomas Jean PROXIMITY DETECTOR BETWEEN A METAL GROUND AND AN ELECTRICALLY VOLTAGE ELEMENT
EP0596878A1 (en) * 1991-08-01 1994-05-18 FORTIN, Gabriel Method and device for electrostatically investigating surface and sub-surface structures
USD383076S (en) * 1995-07-24 1997-09-02 Cripe Rodney J Emergency vehicle proximity alarm system
US5910775A (en) * 1996-08-29 1999-06-08 S&C Electric Company Phasing and indicator arrangements for switchgear or the like
US6002348A (en) * 1998-05-13 1999-12-14 Safe Flight Instrument Corporation Pilot's aid for detecting power lines
US6124798A (en) * 1998-12-09 2000-09-26 Institute Of Occupational Safety And Health, Council Of Labor Affairs, Executive Yuan Alarm device designed to warn of danger of hitting high voltage power line by crane in motion
US6600426B1 (en) 1999-10-04 2003-07-29 The United States Of America As Represented By The Department Of Health And Human Services Alarm system for detecting hazards due to power transmission lines
US20070018841A1 (en) * 2004-11-22 2007-01-25 Nickerson Irvin H High voltage proximity warning system utilizing wireless sensors and method
US8477027B2 (en) * 2007-10-24 2013-07-02 Gerald E. Givens Wireless sensor system
US20090108840A1 (en) * 2007-10-24 2009-04-30 Givens Gerald E Power Line Sensor
US8786447B1 (en) 2012-02-26 2014-07-22 Bryan C. Wise High voltage detection assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6853307B2 (en) 2002-03-14 2005-02-08 Irvin H. Nickerson High voltage proximity warning system and method

Also Published As

Publication number Publication date
DE2137893C3 (en) 1979-12-06
AU474202B2 (en) 1976-07-15
GB1367641A (en) 1974-09-18
DE2137893B2 (en) 1979-04-19
FR2134977A5 (en) 1972-12-08
US3745549A (en) 1973-07-10
JPS53152587U (en) 1978-12-01
AU3135971A (en) 1973-01-25
CA963553A (en) 1975-02-25
NL7111829A (en) 1972-10-23
DE2137893A1 (en) 1972-11-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee