GB681222A - Improvements in or relating to liquid meters - Google Patents

Abstract

681,222. Counting-apparatus. AVERYHARDOLL, Ltd. Feb. 28, 1951 [April 28, 1950], No. 10536/50. Class 106 (i). The driving means for the registering mechanism of liquid meters comprises a differential gear interposed between the meter spindle and the registering mechanism, one element of the differential gear being driven by the meter at a constant speed ratio, a second element of the differential gear being connected to the registering mechanism, the third element of the differential gear being driven by the meter through a continuously, variable friction gear. The driven member of the friction gear is movable through a zero position in which no drive is transmitted thereto and is driven in opposite directions when moved to opposite sides of said zero position. The meter spindle 11, Fig. 2, drives a ring-gear 19 through gears 12 and 13. The internal teeth of the ring 19 drive a planet-wheel 24 on a carrier 23 which through gears 28, 29, worm and worm-wheel 32, 33, gear 36, Fig. 1, drives a cyclometer type counter 35. The planet gear 24 also meshes with a sun-wheel 26 carried by a shaft 25. The external teeth of the ring gear 19 drive the driving-member 39, Fig. 2, of a continuouslyvariable friction gearing 39, 41, the driven member 41 of which is carried by a shaft 44 which carries a worm 45 which meshes with a wormwheel 27 on the shaft 25. The arrangement is such that if the roller 41 is at the centre of the disc 39 no drive is transmitted to sun-wheel 26 as the roller 41 is stationary. The shaft 44 may be adjusted longitudinally in any direction for calibration purposes to effect rotation of the roller 41 in any direction so that the sunwheel 26 rotates in the same or opposite direction as the ring-gear 19, as desired. In a modification. Fig. 3, the shaft 44 is also controlled by a bellows 55 connected to a container 59 which bellows and container are completely full of liquid. The bellows 55 expands or contracts as the temperature of the liquid rises and falls so providing a compensating effect on the counter 35.