Digital clock

Details Digital clock Digital clock

1993-07-28

1995-01-10

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With manually actuated display

368 82, 368239, 345 34, G04C 1700, G04C 1900, G09F 935

Patent

active

053813880

ABSTRACT:
A digital clock comprises an electronic timekeeping circuit, plus electronic digital display means connected to the time keeping circuit to display time as controlled by the circuit. Electronic control means are provided to permit changing of individual numerals displayed in a plurality of locations by manually pointing at the individual numerals. The electronic control means may comprise transparent touch-sensitive detection means positioned in front of the digital display means to permit manual changing of the individual numerals. Alternatively, the electronic control means may comprise one or more light beam emitters and one or more light beam sensors, plus an optical means for passing individual time-gated light beams from the emitter(s) to the sensor(s) in front of the numerals in a position to permit selective occlusion of the individual light beams by manual pointing.

REFERENCES:
patent: 4047010 (1977-09-01), Perotto et al.
patent: 4139837 (1979-02-01), Liljenwall et al.
patent: 4322833 (1982-03-01), Husted
patent: 4387367 (1983-06-01), Fisher
patent: 4538924 (1985-09-01), Nakata
patent: 4785432 (1988-11-01), Havel
patent: 4847606 (1989-07-01), Beiswenger
patent: 4910504 (1990-03-01), Eriksson
patent: 4958911 (1990-09-01), Beiswenger et al.

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