Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1987-12-28
1989-06-13
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
324114, 381 56, G01R 1916
Patent
active
048395846
ABSTRACT:
A signal recording/reproducing apparatus having both bar-type and numeric signal-level displaying units which can be easily read. The apparatus includes a sample-and-hold circuit for sampling and holding an input signal at a first predetermined rate, a first display unit for displaying in bar form the sample values sampled by the sample-and-hold circuit, a data holding circuit for sampling and holding the sample values periodically at a second predetermined rate, and a second display unit for numerically displaying the sample values selected by the data holding circuit. The bar code display can change at a rapid rate to dynamically follow the input signal, while the numeric display changes at a slower rate so as to allow the user sufficient time to comprehend the numerically displayed value.
REFERENCES:
patent: 3421083 (1969-01-01), Bosworth et al.
patent: 3619574 (1971-11-01), Mindheim
patent: 4258317 (1981-03-01), Dubauskas
Arifuku Naoto
Fukuda Nobutoshi
Furuta Yoshiki
Nagao Tatsuro
Tanabe Masashi
Karlsen Ernest F.
Pioneer Electronics Corporation
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