Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1989-06-09
1992-01-07
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324 99D, 324114, 324116, G01R 100, G01R 1508
Patent
active
050795090
ABSTRACT:
A scale is disclosed for a measuring instrument in which a plurality of display elements, specifically liquid crystal display elements which are energizable to a visible condition or an enhanced visible condition selectively to provide a linear scale or a logarithmic scale. The scale is divided into decades which specifically have twelve display elements of which ten are selectively energizable to provide the linear scale and then to provide the logarithmic scale.
REFERENCES:
patent: 2509415 (1950-05-01), Bernreuter
patent: 3611131 (1971-10-01), Burkhart et al.
patent: 3726250 (1973-04-01), Merk
patent: 4174500 (1979-11-01), Kuga
patent: 4463355 (1984-07-01), Schultz et al.
patent: 4748404 (1988-05-01), Heinze et al.
patent: 4789824 (1988-12-01), Henkelmann
patent: 4795972 (1989-01-01), Roppelt et al.
patent: 4968930 (1990-11-01), Grupp et al.
Nguyen Vinh P.
Wieder Kenneth A.
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