Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent
1990-09-17
1991-10-29
Schreyer, Stafford D.
Telephonic communications
With usage measurement
Call charge metering or monitoring
379140, 379190, 379199, 368 4, 368 13, H04M 121, H04M 1502
Patent
active
050621343
ABSTRACT:
A timer for automatically controlling the cumulative service time of a telephone consisting of a box mounted over and plugged into a standard wall telephone outlet. The box contains an exterior receptacle for connection with the telephone cord. The interior of the box is secured by a locked cover that prevents access to the controls as well as to the mounting screws that fasten the unit to the outlet box. The desired total amount of time of phone use permitted during each 24 hour period is selected by setting appropriate control switches and it remains unchanged until a new selection is made. At the expiration of the selected cumulative service time, the timer alerts the user of the impending disconnection by a tone signal and automatically disconnects the phone soon thereafter. The device is powered by a battery backed utility 110 VAC source and it resets itself automatically every 24 hours, so that no periodic adjustments or calibrations are required.
REFERENCES:
patent: 3508392 (1970-04-01), Temps, Jr.
patent: 3581029 (1971-05-01), Noiles
patent: 3833779 (1974-09-01), Leone
patent: 3879332 (1975-04-01), Leone
patent: 3925629 (1975-12-01), Albinger, Jr.
patent: 3997742 (1976-12-01), Marquis
patent: 4079201 (1978-03-01), Scott et al.
patent: 4297546 (1981-10-01), Koch
patent: 4335279 (1982-06-01), Colombo et al.
patent: 4771452 (1988-09-01), Carlson
Durando Antonio R.
Schreyer Stafford D.
Weiss Harry M.
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