The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1977
Filed:
Jun. 07, 1976
Andrew S Dibner, Newton, MA (US);
Lifeline Systems, Inc., Boston, MA (US);
Abstract
A closed-loop system for monitoring the condition of a person in a residence. A digital dialer-transceiver at the residence is connected to a telephone line and may be triggered by an emergency button or the running out of a timer. It transmits identification and alarm codes to a compatible digital transceiver at a central station and at the same time emits an alarm signal at the residence. The central station digital receiving unit acknowledges the communication, means being provided in response to this acknowledgement for changing the 'alarm' signal at the residence to a 'call received' signal. The central station operator calls emergency responders previously recruited for that residence. The responder arriving at the residence presses a reset button on the unit which transmits an 'all clear' signal to the central station and changes the 'call receive' mode of the residence signal to an 'all clear' mode. The central station acknowledges the 'all clear' signal to the residence and in response thereto, dialing of the transceiver at the residence is discontinued.