Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Counting based on number of times machine or apparatus operates
Patent
1989-08-08
1990-10-16
Heymnan, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Counting based on number of times machine or apparatus operates
377 82, 200308, G06M 302
Patent
active
049641441
ABSTRACT:
An electric switch device comprises a contact spring a movable contact element; a movable contact element-supporting member having a protrusion thereof for supporting the movable contact element through the contact spring; a fixed contact element disposed in opposed relation to the movable contact element, the movable and fixed contact elements being moved toward and away from each other to effect closing and opening operations; and a casing for containing the movable and fixed contact elements therein, the casing being provided with a hole through which the protrusion of the movable contact element-supporting member is projected outwardly according the movement of the movable contact element-supporting member. The electric switch also includes a counter mounted on the casing for counting the frequency of projection of the protrusion of the movable contact element-supporting member through the hole.
REFERENCES:
patent: 2951196 (1960-08-01), Marohn
patent: 3580498 (1971-05-01), La Pointe et al.
patent: 3588458 (1971-06-01), Walter
patent: 4112271 (1978-09-01), Marchetti
patent: 4146766 (1979-03-01), Forrester et al.
patent: 4150283 (1979-04-01), Fleischer
patent: 4890306 (1989-12-01), Noda
Tomioka Kotaro
Uchida Kazumi
Fuji Electric & Co., Ltd.
Heymnan John S.
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