Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1983-03-07
1985-05-07
Ruehl, Charles A.
Communications: electrical
Condition responsive indicating system
Specific condition
340547, G08B 1308
Patent
active
045161143
ABSTRACT:
Magnetic door locks characteristically include a high strength electromagnet and a mating plate made of magnetically permeable material, or door strike, mounted on the door frame and the door, respectively. In addition, in order to determine whether the door strike is in engagement with the electromagnet, detection arrangements are provided; and in the present case, simplified detection arrangements are provided by separate portions of the electromagnetic core separated by non-conducting shims or the like, and the closing of a detection circuit extending between the two portions of the electromagnetic core by the magnetic and electrically conducting door strike bridging between the two sections of the core. In addition, the detection circuit may be electrically connected in parallel with electromagnet energization circuit, to positively indicate both that the electromagnet is energized and that the door is closed.
REFERENCES:
patent: 2508305 (1950-05-01), Teetor
patent: 2690348 (1954-09-01), Teetor
patent: 2690349 (1954-09-01), Teetor
patent: 3060370 (1962-10-01), Varterasian
patent: 3312492 (1967-04-01), Remhof
patent: 4287512 (1981-09-01), Combs
Lau Chi K.
Ruehl Charles A.
Securitron-Magnalock Corp.
LandOfFree
Magnetic locking status detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic locking status detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic locking status detection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1802805