Input protecting mechanism for measuring device

Details Input protecting mechanism for measuring device Input protecting mechanism for measuring device

1992-03-13

1993-09-07

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Meter protection or fraud combatting

324115, G01R 100, G01R 1508

Patent

active

052432750

ABSTRACT:
An input protecting mechanism for a measuring device, such as a digital multi-meter, wherein a shutter is provided to open and close selectively input terminal holes for leads, depending on the particular measuring function selected so that the test lead cannot be placed in an improper terminal, so that advantageously, damage to the internal circuitry is prevented by preventing erroneous signals from being applied to the wrong circuits.

REFERENCES:
patent: 2288241 (1942-06-01), Holcomb
patent: 2651755 (1953-09-01), Triplett
patent: 5153511 (1992-10-01), Lee

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