Multi-range timer

Details Multi-range timer Multi-range timer

1979-02-13

1980-09-16

Truhe, J. V.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

235 92T, 368118, G04F 506, G04F 510

Patent

active

042222265

ABSTRACT:
A multi-range timer comprising an RC oscillator with a variable resistor whose resistance is varied with rotation of a dial. A fixed frequency divider circuit frequency-divides the output of the RC oscillator. A variable frequency divider circuit receives an output of the fixed frequency divider circuit, and a time setting section having a digital switch switches a frequency division ratio of the variable frequency divider circuit. The time limit is changed by switching the digital switch. The time setting section comprises a dial and a plurality of numerical value scales distinguished from one another by color, each of said scales having the same color as the display surface of said digital switch, which indicates a selected time setting range.

REFERENCES:
patent: 2844790 (1958-07-01), Thompson et al.
patent: 3045191 (1962-07-01), Blanchard
patent: 3713285 (1973-01-01), Haufe

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