System for interconnecting parking meters having a memory

Details System for interconnecting parking meters having a memory System for interconnecting parking meters having a memory

1986-07-02

1989-03-14

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With meter reading

34087005, 34082535, 235387, 368111, G08C 1906

Patent

active

048128058

ABSTRACT:
The invention relates to a system for interconnecting memory slot machines, for example parking meters or ticket vending machines. Each slot machine (B.sub.1, B.sub.2, . . . ) includes a circuit (C.sub.1, C.sub.2, . . . ) which receives data to be transferred. These circuits are interconnected by a seizure loop (18; 20, 22) and by a data transmission loop (26, 28). When information becomes available at a slot machine, this causes the seizure circuit to be powered up, thereby supplying power to the data transfer loop and to the data-receiving circuits (C.sub.1, C.sub.2, . . . ) of the other slot machines. Once the information has been transmitted to the other slot machines, the above-mentioned circuits are no longer powered.

REFERENCES:
patent: 3760160 (1973-09-01), Gieringer et al.
patent: 4228519 (1980-10-01), Pfeifer
patent: 4310890 (1982-01-01), Trehn et al.
patent: 4356903 (1982-11-01), Lemelson et al.
patent: 4379334 (1983-04-01), Feagins, Jr. et al.
patent: 4495617 (1985-01-01), Ampulski et al.
patent: 4561092 (1985-12-01), Sharer
patent: 4576273 (1986-03-01), Milnes
patent: 4596982 (1986-06-01), Bahr et al.
patent: 4622550 (1986-11-01), O'Connor et al.

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