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:
Apr. 19, 1977
Filed:
Aug. 16, 1974
Keith H Wycoff, Lexington, NB (US);
Other;
Abstract
The receiver includes a decoder responsive to certain characteristics of a coded signal, such as the frequency of tones, for producing a decoded signal indicative of second characteristics of the coded signal, such as the durations of the tones. A duration detector is responsive to the decoded signal to provide a detected signal having properties indicative of the tone duration. A utilization circuit is coupled to the detector and is operated in accordance with the properties of the detected signal. The utilization circuit may be an annunciator which produces an audible or visual alerting signal, or it may express digital information, or it may be a system which is to be remotely controlled. Such receiver may be one in a system of various groups of receivers which can be contacted simultaneously if desired. Also, the receiver may include audio circuitry to provide a voice message in the presence of a predetermined detected signal, and alerting means to provide an alerting signal in response to a different detected signal.