Scale plate for measuring instruments

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates

Patent

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Details

313500, 313517, 350336, G01R 1508, G02F 113

Patent

active

041745000

ABSTRACT:
A plurality of measurement readout displays electrically insulated from one another are provided on a plate member, each of which displays is performed by making use of an excitable material which is capable of being visible only upon the application of a voltage thereto.

REFERENCES:
patent: 3689835 (1972-09-01), Bickfrod
patent: 3781080 (1973-12-01), Aftergut
patent: 3978404 (1976-08-01), Friend

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