Alarm switch

Details Alarm switch Alarm switch

2007-07-17

2007-07-17

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S545100, C335S205000, C335S207000

Reissue Patent

active

09916535

ABSTRACT:
A magnetic switch apparatus (10) detects relative movement between first (12) and second (14) members and defeats attempted external magnetic manipulation of the apparatus. A rod-shaped, first switch element (20) is positioned transverse to and centrally aligned with a convex, second switch element (22) and spaced therefrom. A ring-shaped first magnet (26) is positioned about the first switch element (20) and spaced from the second element (22) in order to pull a ferromagnetic body (24) into a switch-open position out of contact with the second switch element (22) with these components mounted to the first member (12). A second magnet (18) mounted to the second member (14) is positioned and magnetically sufficient to pull the body (24) into a switch-closed position in contact with both of the switch elements (20, 22) when the members (12, 14) are in an adjacent position.

REFERENCES:
patent: 1051962 (1913-02-01), Lundquist
patent: 1192893 (1916-08-01), Harvey
patent: 1868923 (1932-07-01), Semon
patent: 3516036 (1970-06-01), Lea
patent: 3535664 (1970-10-01), Staar
patent: 3630168 (1971-12-01), Findlay
patent: 3650347 (1972-03-01), Campos
patent: 3763484 (1973-10-01), Byers
patent: 3816680 (1974-06-01), Suzuki et al.
patent: 3842377 (1974-10-01), Barndt
patent: 4042796 (1977-08-01), Zink
patent: 4057773 (1977-11-01), Cohen
patent: 4062314 (1977-12-01), Allen et al.
patent: 4168410 (1979-09-01), Norris
patent: 4275391 (1981-06-01), Okamura
patent: 4293860 (1981-10-01), Iwata
patent: 4326196 (1982-04-01), Plevy
patent: 4336518 (1982-06-01), Holce et al.
patent: 4450326 (1984-05-01), Ledger
patent: 4456897 (1984-06-01), Holce et al.
patent: 4553134 (1985-11-01), Holt
patent: 4567846 (1986-02-01), Kurtz
patent: 4628160 (1986-12-01), Canevari
patent: 4656458 (1987-04-01), Iwata
patent: 4733324 (1988-03-01), George
patent: 4788517 (1988-11-01), Meister
patent: 4982058 (1991-01-01), Schroeder et al.
patent: 5192839 (1993-03-01), Imade et al.
patent: 5248861 (1993-09-01), Kato et al.
patent: 5248959 (1993-09-01), Chern
patent: 5332992 (1994-07-01), Woods
patent: 5530428 (1996-06-01), Woods
patent: 5543767 (1996-08-01), Elenbaas
patent: 5673021 (1997-09-01), Woods
patent: 5867082 (1999-02-01), Van Zeeland
patent: 5880659 (1999-03-01), Woods

Affiliated with

Also associated with

Rating

Alarm switch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm switch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3736387