Automatic telephone silencer

Details Automatic telephone silencer Automatic telephone silencer

1980-12-15

1983-05-17

Rubinson, G. Z.

Horology: time measuring systems or devices

Cases

Adaptable

179 2TC, 368 13, H04M 100, H04M 1100

Patent

active

043841716

ABSTRACT:
Electrically operated apparatus silences a telephone ringer in a modular jack telephone system. The apparatus, by means of a photoresistor, or a triac-photoresistor combination, interrupts the conductive path to the telephone ringer while maintaining electrical isolation between the electrical driving current for the apparatus and the telephone network. Connected to the driving current is an incandescent or neon bulb, which, when activated, illuminates the components placed in the ringer's conductive path. Those components, when not illuminated block ringing current, and when illuminated permit it to flow.

REFERENCES:
patent: 2481840 (1949-09-01), Hardgrave
patent: 3867584 (1975-02-01), Rengren
patent: 3982072 (1976-09-01), Dean
patent: 4303831 (1981-12-01), El Hamamsy
FCC Registration No. BK685T-67788-OT--E, granted 3/28/79, to The Burket Company, Toledo, Ohio.
Gilder, Jules H., Telephone Accessories You Can Build; pp. 71-72, Hayden Book Company; Rochelle Park, N.J., 1976.
Installation Instructions and Package Card Accompanying the Phone SILENCER.TM. manufactured by Zoom Telephonics, sold by Radio Shack, Cat No. 43-125.
Installation Instruction Accompanying the SILENT KNIGHT.TM. manufactured by Saxton Products; Congers, N.Y.
IBM Technical Disclosure Bulletin, vol. 10, No. 7, Dec. 1967, p. 1068; "Solid State Switch" by D. G. East.
Application Note, 200.62, 1/73; "Photon Couplers" by Korn et al; General Electric, Semiconductor Products Department; Syracuse, N.Y.
Electronics, Nov. 27, 1975, pp. 120-121; "Optical Isolator Circuit Shows Phone-Line Status" by Matthew L. Fichtbaum.

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