Variable configuration time clock

Details Variable configuration time clock Variable configuration time clock

1988-05-18

1990-06-26

Reynolds, Bruce A.

Recorders

Instrument support instrument part support

346 82, 174 59, 235377, 235419, G01D 1300, G06C 1500, H02G 1318

Patent

active

049375997

ABSTRACT:
A time clock housing has a back plane circuit providing parallel circuit connections between identical pins on a plurality of circuit board connectors mounted on the back plane. This permits mounting any circuit board to any connector. The time clock includes a basic configuration of components as follows: a power supply, a floppy disk controller, a central processing unit, a ROM, a RAM, a real time clock having its own battery, an input/output circuit, an interface circuit, a keypad, a card reader, a liquid crystal display and an internal printer. The time clock optionally includes components as follows: a backup battery, a hard disk controller and hard disk, a video display circuit, a modem and a local area network circuit. Connectors may also be provided for connecting other devices to the time clock to enter data or receive data.

REFERENCES:
patent: 4270043 (1981-05-01), Baxter et al.
patent: 4323771 (1982-04-01), Chalker, Jr. et al.
patent: 4333085 (1982-06-01), Witts
patent: 4358777 (1982-11-01), Bille
patent: 4578702 (1986-03-01), Campbell, III
patent: 4603335 (1986-07-01), Koyasu
patent: 4672182 (1987-06-01), Hirokawa

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