OPENTECHNICAL PUBLICATION
OT-2026-000000082

Rotational indicator with mechanically adjustable reduction factor

Published: 2026-09-15T19:02:28.188733Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000082
Categories: Industrial Motion & Power Transmission > Rotary Motion

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ABSTRACT

A rotational indicator comprises a mechanical reducer having a reduction
factor that is variable without exchanging components. A plurality of
identical double gears rotate about a pair of parallel fixed shafts, a large
gear of each double gear being intermeshed with a small gear of a preceding
double gear on the opposing shaft. An axially moveable pinion gear is
rotationally fixed to a rotatable pinion shaft, and is engageable with any of
the large gears of the double gears according to its axial location, whereby a
reduction factor between a rotational input and the pinion gear is variable.
The pinion shaft is coupled to an indicating mechanism, which can be a pointer
of a dial assembly and/or a rotary electrical component. The rotational input
can be bounded, and the reduction factor can be adjusted to provide a bounded
output range that is compatible with the indicating mechanism.

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OpenTechnical publication OT-2026-000000082
Published 2026-09-15T19:02:28.188733Z
https://opentechnical.org/p/OT-2026-000000082