| 释义 |
operameter Mech.|ɒpəˈræmɪtə(r)|
[irreg. f. L. opera works + Gr. µέτρον measure.]
A device for registering the number of revolutions made by a shaft, axle, or wheel, the strokes of a piston, the copies delivered from a printing-press, etc.
1829Patents in Ann. Reg. 548/2 S. Walker, Beeston, Leeds, for an improved apparatus which he denominates ‘an operameter’. 1839Ure Dict. Arts, Operameter,..It consists of a train of toothed wheels and pinions enclosed in a box, having indexes attached to the central arbor, like the hands of a clock, and a dial plate; whereby the number of rotations of a shaft projecting from the posterior part of the box is shown. 1875Knight Dict. Mech. 1562/1. |