Robert J Malinowski

US Patent:

56380461, Jun 10, 1997

Filed:

Feb 13, 1995

Appl. No.:

8/387555

Inventors:

Robert Malinowski - Leominster MA

International Classification:

G08B 108

US Classification:

340539

Abstract:

A security system for determining intrusion status in a defined area. The system uses a sensor unit, a transmitter, and a receiver. The transmitter sends a unidirectional repetitive coded signal to the receiver. The receiver is capable of receiving the signal, decoding it and displaying the intrusion status to a display. The transmitter uses a novel electric connection and orientation in which the sensor and status decoder is electrically connected to a detection memory, an encoder and transmission control unit is electrically connected to a status collector, and a radio frequency transmitter is electrically connected to an encoder and transmission control unit. The unit provides sophisticated intrusion status detection based on the combination of the parts, organization and electrical connections. The system avoids false alarms due to the unidirectional and repetitive coded signal which is sent to and from the transmitter to the receiver. The transmitter is able to transmit a continuous and repetitive signal which is received by the receiver to give the intrusion status up to the nearest second.