Dynamic escrow type detection system

Details Dynamic escrow type detection system Dynamic escrow type detection system

1997-10-07

2000-01-11

Kuntz, Curtis A.

Telephonic communications

With check operated control

Coin signalling or control

379150, 379155, H04M 1700

Patent

active

060144335

ABSTRACT:
An escrow unit is an electromechanical device used to collect or return coins deposited in a pay telephone. An escrow management system 10 for use in controlling a pay telephone escrow unit 26 is provided which consists of an energy storage unit 20 which stores a voltage for use in activating escrow unit 26 upon control unit 40 closing discharge switch 30. The system also contains a detector 42 to determine the voltage requirement of escrow unit 26 by sensing characteristics of escrow unit 26 related to the impedance of the escrow unit. The system also contains a control unit 40 which controls energy storage unit 20 and detector 42 such that escrow management system 10 can both dynamically determine the voltage required to activate escrow unit 26 and supply the correct voltage for activation of escrow unit 26.

REFERENCES:
patent: 3842210 (1974-10-01), Dawson
patent: 4759054 (1988-07-01), Mellon
patent: 4768227 (1988-08-01), Dively et al.
patent: 4803719 (1989-02-01), Ulrich
patent: 4860346 (1989-08-01), Mellon
patent: 5027935 (1991-07-01), Berg et al.
patent: 5133005 (1992-07-01), Kelley et al.
patent: 5311582 (1994-05-01), Davenport et al.

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