Patent GB-190423609-A (GB)
Title: Improvements in Integrating Apparatus for use in connection with Water-meters and analogous Apparatus for Measuring the Flow, or Pressure, of Fluids.
Inventor: JOHNSON JAMES YATE
Filed: 1904-11-01
Granted: 1905-04-13
Abstract: 23,609. Johnson, J. Y., [Ferris, W.]. Nov. 1. Liquid meters; pressure gauges. - A flowing liquid is made to act upon a liquid of greater density, which is forced into a suspended vessel to increase the weight thereof, this weight being recorded by special apparatus described. Fig. 1 shows a part sectional view of the apparatus, and Fig. 5 shows the connection of the same with the liquid-conducting tube. The apparatus comprises two vessels 1, 2, of which one, 1, is fixed and the other, 2, is suspended on one arm of a lever 13 and has communication with the vessel 1 by means of a spiral tube 4, so that the liquid of greater density, such as mercury, can flow from one vessel to the other. The vessel 1 communicates with the liquid-conducting pipe X by means of a Pitot tube y projecting into such flow pipe with its mouth presented to the flow. The vessel 2 communicates by means of the spiral tube 6 and the static pressure tube x with the pipe X, so that, when fluid is flowing in this pipe, liquid will be forced from the vessel 1 into the suspended vessel 2, so actuating the lever 13, the spindle of which carries the arm of a pointer 17 intended to produce a record on the clockwork-driven drum 18. The bore of the column 2 is so made that the weight of the mercury transferred thereto from the reservoir 1 will give a substantially accurate indication of the velocity of flow, from which the volume of the flow can be obtained. The clock train driving the drum 18 also drives a spur-wheel 21 mounted on a tubular shaft 22 having a frame-with three arms 23, each of which carries a pivoted pawl 24 adapted to engage the teeth of the ratchet-wheel 25, as shown in Fig. 3. This wheel is secured to a shaft 26 passing through the shaft 22 and actuating the registering-device 27. Each of the pawls 24 is provided with two projecting pins 28, 29, the pins 28 being acted upon by a fixed throw-out cam on one side of the wheel 25 at a certain point in the travel of the pawls, and the pins 29 bearing upon a cam-disc 31 on the other side of the wheel 25. This disc has high and low portions bearing such relation to the periphery of the wheel 25 that, when the pins 29 bear upon the high portion of the disc, the pawls are held away from the teeth of the wheel 25, and when they bear upon the low part, they engage the wheel 25 ; hence, the time during which the pawls engage the wheel depends upon the distance between the high portion of the cam-disc 31 and the point at which the pawl is disengaged by the fixed throw - out cam. In order that this distance may be governed by the rise and fall of the column 2, the cam-disc 31 is carried by a sleeve 34, which is also provided with a pinion 32 which engages with a segment 33 carried by the spindle 14 of the lever 13. In order that the base-line of the column 2 shall be on the same level as the mercury in the reservoir 1, the stiffness of the springs and the diameter of the reservoir bear a certain relation to one another, so that the mercury column may descend just as far as the mercury level in the reservoir descends. Either the reservoir 1 or the column 2 may be weighed, or both may be carried by the scale lever 13, as shown in Fig. 4, and a spring may be placed at one end only of the column 2, the tube 4<a> at the other end being merely flexible or pas-ing through a stuffing-box. When neither of the tube connections 4, 6 of the mercury column is elastic, so as to serve as the spring member of the spring scale construction, some equivalent spring connection with the mercury column or with the scale lever, such as 6<a>, should be provided.