GB483466A - Improvements in or relating to meters - Google Patents

Abstract

483,466. Liquid-pressure meters. WAYNE CO. Aug. 17, 1936, No. 22635. Convention date, June 15. [Class 69 (ii)] In a meter for measuring the flow of liquids wherein a piston slidable in a cylinder controls the actuation of a distributing-valve of the rotary or slide type through a shaft rotated thereby, the operating-means are so constructed and arranged as to perform a substantially straight line motion at its point of connection with the piston-rod during the complete cycle of operation of said meter. The meter shown in Fig. 1 comprises a casing having a pair of cylinders, with a valve seat arranged between them upon which is arranged a rotary, disc valve controlling the inlet and discharge of the ends of the cylinders. The piston-rods have straight-line motions and operate a transverse crank-shaft through toothed gearing. The shaft 156 operates the valve and the meter counter. The cylinder casing 32 is enclosed at the bottom by a plate 34, and at the top by a plate 40 about which is mounted a casing 30 covering the driving-gear. A casing 46 provided with an inlet 47 is mounted above the plate 40 which constitutes the valve seat, and which has a central outlet 62 and radial ports, circumferentially arranged, connected to the cylinder ends. The piston-rods are secured to the flanges 130, 132 of couplings 134, 136 connected at 137, 142 to the cranks 138, 144 of the pinions 140, 146 respectively, which are mounted on crank-pins 148, 150 at 90‹ on the shaft 156 and gear with internal teeth in fixed circular racks 158, 160. The diameter of the pitch circle of the pinions is one-half that of the racks. The bearings of he shaft are supported by a transverse yoke 170. A bevel gear 174 on the shaft 156 operates the meter shaft 184. The gear also drives the valve-shaft 190 mounted on a thrust roller bearing 196. A cross-head 202 on shaft 190 drives the valve through pivots and oblique links 224, 226. The valve has a domed outlet 210, Fig. 13, an inlet 214, and sockets 216 which may receive a U-shaped driver instead of the drive shown. The drive releases the pressure between the valve and its seat. The stroke of one or both pistons may be adjusted to effect calibration. The casing 46, Fig. 1, is provided with a socket and an adjustable pin 242. The coupling 136 is connected through a slot connection with the pinion crank 144. The position of the pin determines the piston stroke. A modified form of strokeadjusting apparatus is arranged in a piston. The upper retaining plate of the piston has a small cylinder closed by a cap extending below the main piston. An auxiliary piston slides within the auxiliary cylinder and has fingers which engage the upper cylinder end and a lower projection which engages an adjustable stop. Calibration is effected by adjusting the stop and thereby the stroke of the auxiliary piston. In the modification shown in Fig. 21, pairs of parallel cylinders 416, 417 are arranged side by side. The distribution is effected by longitudinally-sliding valves. The meter shaft 448 is driven by bevel gearing from a transverse shaft 458 provided with slotted cams which operate the valve-actuating levers 480, 482 pivoted on a transverse shaft 485. Internally-toothed rings 492, 494 are supported by the casing and engage pinions 500, 502 connected to the cams 464, 466. The pinions are pivoted to the piston-rods at 512, 514 connected to the opposed pistons. Specification 483,526 is referred to. In the Specification as open to inspection under Sect. 91, a modified form of meter is described, wherein the crank-shaft is transversely arranged in a horizontal cylinder with opposed pistons which operate through pin- and-slot mechanism. A rotary distributing- valve is operated from the shaft and operates the meter shaft by a U-member thereon engaging recesses in the valve. One piston is non-adjustable; the other has an auxiliary cylinder and piston mounted therein, the piston being connected to adjustable tappet means to effect calibration. This subjectmatter does not appear in the Specification as accepted.