CA963553A - Proximity alarm - Google Patents
Proximity alarmInfo
- Publication number
- CA963553A CA963553A CA120,967A CA120967A CA963553A CA 963553 A CA963553 A CA 963553A CA 120967 A CA120967 A CA 120967A CA 963553 A CA963553 A CA 963553A
- Authority
- CA
- Canada
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Alarm Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Control And Safety Of Cranes (AREA)
- Burglar Alarm Systems (AREA)
- Jib Cranes (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA214,421A CA979994A (en) | 1971-04-19 | 1974-11-22 | Proximity alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13534771A | 1971-04-19 | 1971-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA963553A true CA963553A (en) | 1975-02-25 |
Family
ID=22467692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA120,967A Expired CA963553A (en) | 1971-04-19 | 1971-08-20 | Proximity alarm |
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) | GB1367642A (en) |
NL (1) | NL7111829A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485092A (en) * | 1991-08-01 | 1996-01-16 | Fortin; Gabriel | Method and device for electrostatically investigating surface and sub-surface structures |
US6853307B2 (en) | 2002-03-14 | 2005-02-08 | Irvin H. Nickerson | High voltage proximity warning system and method |
Families Citing this family (14)
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 |
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 |
WO2009055709A1 (en) * | 2007-10-24 | 2009-04-30 | Gerald Givens | Power line sensor |
US8477027B2 (en) * | 2007-10-24 | 2013-07-02 | Gerald E. Givens | Wireless sensor system |
US8786447B1 (en) | 2012-02-26 | 2014-07-22 | Bryan C. Wise | High voltage detection assembly |
-
1971
- 1971-04-19 US US00135347A patent/US3745549A/en not_active Expired - Lifetime
- 1971-07-01 GB GB1220174A patent/GB1367642A/en not_active Expired
- 1971-07-01 GB GB3083471A patent/GB1367641A/en not_active Expired
- 1971-07-19 AU AU31359/71A patent/AU474202B2/en not_active Expired
- 1971-07-29 DE DE2137893A patent/DE2137893C3/en not_active Expired
- 1971-08-20 CA CA120,967A patent/CA963553A/en not_active Expired
- 1971-08-27 NL NL7111829A patent/NL7111829A/xx not_active Application Discontinuation
- 1971-12-27 FR FR7146757A patent/FR2134977A5/fr not_active Expired
-
1977
- 1977-12-19 JP JP1977171015U patent/JPS53152587U/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5485092A (en) * | 1991-08-01 | 1996-01-16 | Fortin; Gabriel | Method and device for electrostatically investigating surface and sub-surface structures |
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 |
---|---|
AU474202B2 (en) | 1976-07-15 |
JPS53152587U (en) | 1978-12-01 |
GB1367642A (en) | 1974-09-18 |
US3745549A (en) | 1973-07-10 |
AU3135971A (en) | 1973-01-25 |
DE2137893B2 (en) | 1979-04-19 |
DE2137893C3 (en) | 1979-12-06 |
DE2137893A1 (en) | 1972-11-09 |
GB1367641A (en) | 1974-09-18 |
FR2134977A5 (en) | 1972-12-08 |
NL7111829A (en) | 1972-10-23 |
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