Change-over switch with de-chattering device for electronic weig

Details Change-over switch with de-chattering device for electronic weig Change-over switch with de-chattering device for electronic weig

1981-02-02

1982-09-14

Hartary, Joseph W.

Weighing scales

Preset

177DIG3, 307247A, G01G 2300

Patent

active

043490760

ABSTRACT:
A circuit for electronic weighing scales, for example, for shifting or switching the circuit between two states and at the same time for de-chattering mechanical contacts, wherein the circuit includes two inverted gates with crossed feedback constituting a flip-flop. A first resistor is connected in the feedback from the output of the second gate to the input of the first gate, and a condenser has one electrode connected to constant potential and another electrode connected to the output of the first gate. A second resistor of high impedance is connected between the condenser and the output of the first gate, and an operating contact is arranged between the second electrode of the condenser and the input of the first gate.

REFERENCES:
patent: 3324306 (1967-06-01), Lockwood
patent: 3894247 (1975-07-01), De Jong
patent: 4015142 (1977-03-01), Nagaoka

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