Touchless (photo type) and contact digital dual purpose tachomet

Details Touchless (photo type) and contact digital dual purpose tachomet Touchless (photo type) and contact digital dual purpose tachomet

1987-06-26

1989-04-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

73529, 324160, 324166, 340727, G01P 336, G01P 302

Patent

active

048230804

ABSTRACT:
This invention is directed to a combination touchless (photo type) and contact type tachometer having a digital display for measuring high, medium and low rotating and surface speeds. Mechanical rotation may be detected by a photo emitting-receiving sensor on the left-hand end of the device or by the contact transmitter located on the right-hand side. The received signal is amplified by an amplifier circuit and regulated by a regulator circuit. Subsequently the data is processed by a standard micro-processor IC circuit, for performing calculations, unit conversion and display decoding. The speed and other information are precisely displayed by a shiftable and reversible, rotatable 180.degree., digital displaying unit to achieve the advantages of an easy to read, precise, economical and effective tachometer.

REFERENCES:
patent: 4000465 (1976-12-01), Sugiyama
patent: 4225929 (1980-09-01), Ikeda
patent: 4554638 (1985-11-01), Iida

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