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, 1983
Filed:
Jul. 13, 1981
Frank L Simokat, Broken Arrow, OK (US);
TII Industries Inc., Copiague, NY (US);
Abstract
A circuit arrangement utilized for extending the ringing range of a single party telephone service utilized on long rural line loops where the ringer and a blocking capacitor of the subscriber's telephone instrument has been connected across the tip and ring electrical conductors of the loop includes; a pair of terminals connected to the tip and ring conductors of the subscriber's line, a zener diode connected from one of the electrical conductors with a capacitor connected in parallel therewith. A switching device is connected in series with the parallel connection of the zener diode and capacitor providing a current path to a reference ground. A circuit device responsive to the application of the ringing signal voltage between a reference ground and the other electrical conductor of the subscriber loop activates the switching means to provide a relatively low impedance current path effectively removing one of the electrical conductors from the subscriber loop of the ringing circuit, therefore enabling the ringing voltage to be extended over a loop which is double the length of the normal rural subscriber loop.