Timekeeping device

Details Timekeeping device Timekeeping device

1980-05-07

1983-03-15

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368155, 368187, G04F 800, G04C 1500, G04C 900

Patent

active

043769950

ABSTRACT:
An electronic timekeeping device performs timekeeping functions and on command selectively outputs a plurality of data signals and performs supplemental functions for an external unit such as a microcomputer. Control signals inputted via a data bus from the external unit actuate switch means which selectively permit the external unit to command the timekeeping device to output required data signals or perform a particular function. The basic timekeeping circuits of the device continuously perform the timekeeping function regardless of the data signals or functions which have been commanded for output, and when the external unit is inoperative. Data signals from the external unit can also be input to modify the data output of the timekeeping device. Individual data buses within the timekeeping device are devoted to particular functions.

REFERENCES:
patent: 3462741 (1969-08-01), Bush et al.
patent: 4035627 (1977-07-01), Dickinson et al.
patent: 4115870 (1978-09-01), Lowell
patent: 4151596 (1979-04-01), Howells
patent: 4218876 (1980-08-01), Hashimoto et al.
patent: 4238832 (1980-12-01), Tsuzuki et al.
patent: 4245323 (1981-01-01), Yamazaki et al.
patent: 4247925 (1981-01-01), Mesai et al.
patent: 4270193 (1981-05-01), Igakiawa

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