Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1974-03-06
1976-02-10
Queisser, Richard C.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G04B 1700, G04D 712
Patent
active
039370496
ABSTRACT:
An electronic timepiece provided with a liquid-crystal cell in a grounded casing, a common electrode on one side thereof and a segmented pattern electrode on the other side has a transparent shield electrode which is grounded to the casing and overlies the major part of the cell, with the exception of at least one window registering with a detecting electrode positioned on the glass cover of the casing. An ungrounded electrode underneath the window is pulsed by the electronic clockwork, the pulses being picked up by the detecting electrode and delivered to an evaluating device for measuring the operating rate of the timepiece. In one embodiment, two such windows associated with respective detecting electrodes are provided, one window registering with the common electrode at a location remote from all the segments of the pattern electrode, the other window being aligned with a coplanar extension of one of the segments of a digital array which is intermittently energized in the course of a pattern-forming cycle; the evaluator distinguishes between periods when the pulses picked up by the detecting electrodes are in phase and in phase opposition.
REFERENCES:
patent: 2748595 (1956-06-01), Hetzel
patent: 3838564 (1974-10-01), Holcomb
patent: 3892124 (1975-07-01), Reese
Kawashima Hideyuki
Murakami Tomomi
Appleman John S.
Citizen Watch Co. Ltd.
Dubno Herbert
Montague Ernest G.
Queisser Richard C.
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