ANGELO P DEBENEDICTIS
Water and Wastewater in Carlisle, MA
License number
Massachusetts 7044
Issued Date
Nov 6, 1999
Expiration Date
Dec 31, 2017
Type
Drinking Water Operator
Address
Address
Carlisle, MA 01741
Professional information
Pulse Code Modulation Responsive Alarm System
US Patent:
4260982, Apr 7, 1981
Filed:
Oct 25, 1979
Appl. No.:
6/088034
Inventors:
Angelo P. DeBenedictis - Carlisle MA
Plato Zorzy - Salem MA
Plato Zorzy - Salem MA
International Classification:
G08B 310
US Classification:
340539
Abstract:
A system for producing an alarm whenever the distance between a transmitter and a receiver exceeds a predetermined distance. The transmitter includes circuitry for generating a signal having a preselected pulse code modulation pattern. The receiver includes circuitry for responding to the particular pulse code pattern and for sounding an alarm when the signal from the transmitter is so weak that pattern is not received.