EP0746829A4 - Security alarm switch - Google Patents

Security alarm switch

Info

Publication number
EP0746829A4
EP0746829A4 EP94921167A EP94921167A EP0746829A4 EP 0746829 A4 EP0746829 A4 EP 0746829A4 EP 94921167 A EP94921167 A EP 94921167A EP 94921167 A EP94921167 A EP 94921167A EP 0746829 A4 EP0746829 A4 EP 0746829A4
Authority
EP
European Patent Office
Prior art keywords
assembly
ball
lower switch
mounting
elements
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.)
Granted
Application number
EP94921167A
Other languages
German (de)
French (fr)
Other versions
EP0746829B1 (en
EP0746829A1 (en
Inventor
Randall Woods
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0746829A1 publication Critical patent/EP0746829A1/en
Publication of EP0746829A4 publication Critical patent/EP0746829A4/en
Application granted granted Critical
Publication of EP0746829B1 publication Critical patent/EP0746829B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/0046—Limit switches, also fail-safe operation or anti-tamper considerations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

A magnetic switch assembly (10) is provided for detecting relative movement between first and second adjacent members (14, 18), and to defeat attempted magnetic manipulation of the assembly (10). The assembly (10) includes a pair of adjacent, superposed, upper and lower switch elements (22, 24) adapted for mounting on the first member (14), with the lower switch element (24) presenting a sloped surface (26). A shiftable, ferromagnetic ball (34) is disposed between the elements (22, 24) and movable along surface (26) between spaced upper and lower switch operating positions. A magnet (36) adapted for mounting on the second member (18) is also provided, and is oriented for normally retaining the ball (34) in the upper position thereof; however, upon movement of the member (18), the ball (34) is permitted to shift downwardly along the position thereof.
EP94921167A 1994-02-23 1994-04-07 Security alarm switch Expired - Lifetime EP0746829B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US20014394A 1994-02-23 1994-02-23
US200143 1994-02-23
PCT/US1994/003818 WO1995023392A1 (en) 1994-02-23 1994-04-07 Security alarm switch

Publications (3)

Publication Number Publication Date
EP0746829A1 EP0746829A1 (en) 1996-12-11
EP0746829A4 true EP0746829A4 (en) 1998-09-16
EP0746829B1 EP0746829B1 (en) 2003-06-18

Family

ID=22740515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94921167A Expired - Lifetime EP0746829B1 (en) 1994-02-23 1994-04-07 Security alarm switch

Country Status (6)

Country Link
EP (1) EP0746829B1 (en)
AT (1) ATE243352T1 (en)
AU (1) AU682521B2 (en)
CA (1) CA2183554C (en)
DE (1) DE69432833T2 (en)
WO (1) WO1995023392A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5880659A (en) * 1997-03-17 1999-03-09 Woods; Randell Magnetic switch assembly for detecting unauthorized opening of doors or windows
ES2222796B1 (en) * 2003-03-25 2006-03-16 Francisco Calle Calderon ALARM SYSTEM THROUGH OPENING DETECTOR IN SECURITY GATES, DOORS AND WINDOWS.
CN102930680B (en) * 2012-10-26 2015-03-11 北京通宇泰克科技有限公司 Wireless anti-theft alarm terminal for well lid
FR3016962A1 (en) * 2014-01-29 2015-07-31 Jean Paul Igougne DEVICE FOR DETECTING AND SIGNALING LEAKS IN A WATER SUPPLY NETWORK
CN110772807A (en) * 2019-12-04 2020-02-11 湖南贝尔动漫科技有限公司 Vehicle-mounted sports doll

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1665595A1 (en) * 1966-03-31 1971-03-25 Siemens Ag Magnetically operated switching device
US3842377A (en) * 1973-07-05 1974-10-15 Martin C Magnetic switch

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816680A (en) * 1971-08-18 1974-06-11 Tokai Rika Co Ltd Acceleration responsive switch
US3763484A (en) * 1972-09-27 1973-10-02 W Byers Inertia-tilt switch
FR2384342A1 (en) * 1977-03-15 1978-10-13 Tarditi Aet Anc Ets Contactor with moving contact responsive to magnetic field - has contact pin freely movable in chamber whose inner surface is conductive
JPS6040002Y2 (en) * 1980-01-16 1985-12-02 敬助 岩田 Vehicle radio antenna
US4450326A (en) * 1981-10-19 1984-05-22 Ledger Curtis G Anti-theft vibration detector switch and system
JPS61170015U (en) * 1985-04-11 1986-10-22
US4628160A (en) * 1985-10-28 1986-12-09 Allied Corporation Electrical tilt switch
US4733324A (en) * 1987-04-06 1988-03-22 Franklin Electric Co., Inc. Surge arrestor
US5248861A (en) * 1989-08-11 1993-09-28 Tdk Corporation Acceleration sensor
JPH0492353U (en) * 1990-12-26 1992-08-11
US5248959A (en) * 1992-06-04 1993-09-28 Chern Wen Bin Earthquake warning device
US5332992A (en) * 1993-04-06 1994-07-26 Randall Woods Security alarm switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1665595A1 (en) * 1966-03-31 1971-03-25 Siemens Ag Magnetically operated switching device
US3842377A (en) * 1973-07-05 1974-10-15 Martin C Magnetic switch

Also Published As

Publication number Publication date
ATE243352T1 (en) 2003-07-15
WO1995023392A1 (en) 1995-08-31
EP0746829B1 (en) 2003-06-18
DE69432833T2 (en) 2003-12-04
AU7199194A (en) 1995-09-11
AU682521B2 (en) 1997-10-09
EP0746829A1 (en) 1996-12-11
CA2183554C (en) 2003-07-01
CA2183554A1 (en) 1995-08-31
DE69432833D1 (en) 2003-07-24

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