Device for counting small projections or depressions on surfaces

Details Device for counting small projections or depressions on surfaces Device for counting small projections or depressions on surfaces

1990-05-11

1992-04-14

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting based on number of times machine or apparatus operates

377 8, 377 28, G06M 900

Patent

active

051054485

ABSTRACT:
A device for counting the number of very small projections on a surface of an object, which includes a casing therein housing a probe to be scanned in contact with the surface of the object having continuously occurring very small projections, a tip end portion of the probe being projected out of a forward end of the casing; a detecting unit including an acceleration sensor; a comparator for converting electric signals emitted from the detecting unit into pulse signals; a latching device provided with a delay circuit for latching the pulse signals received and maintaining its emitted signals for a certain length of time; and a display device for counting and displaying the output signals from the latching device.

REFERENCES:
patent: 3497725 (1970-02-01), Lorditch
patent: 3571574 (1971-03-01), Gerber
patent: 3862402 (1975-01-01), Igarashi et al.
patent: 4974237 (1990-11-01), Grabowski

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