Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1993-02-11
1995-10-24
Swann, Glen
Communications: electrical
Condition responsive indicating system
With particular system function
340541, 340545, 340566, 340595, 200 6171, 200 6174, G08B 1302, G08B 1308, G08B 1706
Patent
active
054613639
ABSTRACT:
A safety apparatus for a passage controlled by means of a first member and a second member, has a first device for detecting opening of the passage, a second device for detecting fierce knocking on the first and second members and a third device for detecting abnormally high temperature. The first device detects relative movement between the first and second members. The first device has (a) a block being attached to the first member and having a curved surface, (b) a detector having a casing attached to the second member and a pin having a free end so that the pin is in various positions relative to the casing when the free end of the pin is in various positions against the curved surface of the block as the first member is moved relative to the second member and (c) an alarm actuated by means of the detector for warning of the relative movement between the first member and second members. The second device has a microphone for detecting noise caused by vibration of, as a function of knocking on, at least one of the first and second members. The third device has a thermistor for detecting temperatures.
REFERENCES:
patent: 2943308 (1960-06-01), Westphal
patent: 2984718 (1961-05-01), Fish
patent: 3091760 (1963-05-01), Spenard et al.
patent: 3618062 (1971-11-01), Ott
patent: 3634840 (1972-01-01), Wilkinson
patent: 3641571 (1972-02-01), Kitman
Security Distributing & Marketing, Nov. 1991, pp. 21, 31, 79, 91 and 97.
Linear Alert, Linear Corporation, 1988.
Security Sales, Vol. 15, No. 5, May 1993, pp. 37, 41, 49, 78, 100, 114 and 130.
Napco Brochure, 1992.
Visonic Ltd. Advertisement.
Linear Advertisement, p. 23.
Caddx Controls Brochures#UL-5000 ᎊ.
Security Sourcebook, 1993, pp. 64-83.
LandOfFree
Alarm apparatus containing security and safety monitors 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 apparatus containing security and safety monitors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm apparatus containing security and safety monitors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1889446