Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-07-16
1998-04-21
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340527, 34030915, 340692, 340430, G08B 1300
Patent
active
057422311
ABSTRACT:
An intrusion detection system is disclosed including a warning device and a sensor for generating a sensor signal in response to an intruder. A driver coupled between the sensor and the warning device, which is operative to switch from an "off" state to an "on" state in response to the sensor signal. The driver in the "off" state disables the warning device, while in the "on" state the driver activates the warning device. The system further includes a controller for the driver, which includes an oscillator normally in a "static" or unenergized state of operation. The oscillator is activated in response to the sensor signal being continuous for a first predetermined period of time to cause the controller to lock the driver in the "on" state for a second predetermined period of time.
REFERENCES:
patent: 3613064 (1971-10-01), Peterson et al.
patent: 3614734 (1971-10-01), Davis
patent: 3634844 (1972-01-01), King
patent: 4030087 (1977-06-01), Ritchie et al.
patent: 4095211 (1978-06-01), Shaughnessy
patent: 4157540 (1979-06-01), Oros
patent: 4201982 (1980-05-01), Humphries
patent: 4207559 (1980-06-01), Meyer
patent: 4282518 (1981-08-01), Bonner
patent: 4528553 (1985-07-01), Hastings et al.
patent: 4755792 (1988-07-01), Pezzolo et al.
patent: 4967183 (1990-10-01), D'Ambrosia et al.
patent: 5117217 (1992-05-01), Nykerk
patent: 5128650 (1992-07-01), Peters et al.
patent: 5157375 (1992-10-01), Drori
patent: 5172093 (1992-12-01), Nose et al.
patent: 5172094 (1992-12-01), Stadler
patent: 5216407 (1993-06-01), Hwang
patent: 5264822 (1993-11-01), Vogelman et al.
patent: 5347273 (1994-09-01), Katiraie
patent: 5412370 (1995-05-01), Berman et al.
Hofsass Jeffery
Wu Daniel J.
LandOfFree
Intrusion 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 Intrusion detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrusion detection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2061891