Magnum Products, Inc.

World Electronics, Inc.

Fred Dennis Kedjierski

John Bailie

An improved hybrid electronic radio repeater comprising an antenna means for receiving a select, narrow frequency band of radio wave signals, the radio wave signal(s) being transmitted from discrete sources wherein the radio wave signals contain source, status and control information. A radio frequency amplifier means filters and amplifies the radio signals and passes them to a mixing means. The mixing means, including a local oscillator means, combines the radio frequency signals with the local oscillator signals to produce intermediate frequency signals. The intermediate frequency signals are narrow filtered causing tuning by local oscillator tuning means. An intermediate frequency amplifier means detects and amplifies the IF signals and generates a signal strength level indication in response thereto. A control means, the control means being an intelligent unit capable of discerning information and generating responses thereto, monitors the signal strength level indications and also initiates the tuning voltage level of said narrow frequency band local oscillator tuning, for the presence of select radio wave signals, the control means tuning the hybrid radio repeater in response to the presence of the select signals.

Hybrid electronic radio repeater

An intrusion alarm and emergency illumination apparatus includes an audible alarm and lighting device which are activated by sounds associated with human intrusion into a physical structure. The sounds of intrusion may be differentiated from other sounds by a bandpass digital amplifier and rate of rise detector which receive audio-electrical waveforms from a microphone. A monostable multivibrator and variable resistance element may be employed to select the duration of activation of the lightning device and alarm and may be employed to provide a preselected exit delay permitting an operator to arm the system and leave the premises without having the sounds of his exiting activate the lighting device and alarm. Emergency illumination may be provided by a reserve power system used to energize the lighting device and alarm system during power outages.

Growing community of inventors

Margate, FL, United States of America

Fred Dennis Kedjierski