Patent GB-158515-A (GB)
Title: Improvements in and relating to automatic weighing machines
IPC: G01G21/00
Filed: 1921-01-24
Abstract: 158,515. Boulogne, B. Jan. 24, 1921. Automatic-feed weighers.-In an automatic weighing machine for liquids or granular substances, of the kind in which after each discharge from the weighing receptacle a residue is left behind, the weighing-receptacle is capable of rotation upon an horizontal axis within the limits of stops operating at the charging and discharging positions, and means are provided for compelling the weighing receptacle to accomplish the first part of its movement after being charged and after being discharged, under the control of the movement of the weigh-beam, and subsequently to release the weighing-receptacle during its further rotation towards the extreme position, the completion of the movement being effected under the influence of the distribution of weight of the receptacle or of its contents or of both combined. In Fig. 1 is shown a machine for weighing liquids, the weighing receptacle 1 being arranged to rotate in a counterclockwise direction for the purpose of discharging the contents. In the operation of the machine the liquid from the supply chamber passes through valves 20, 80 and enters the weighing receptacle 1. The rise of the liquid in the receptacle fills a pocket 13 or equivalent enlargement and causes the receptacle to rotate in a clockwise direction until arrested by contact of a stop 72 against a suspension rod 3. Further filling of the receptacle rocks an intermediate lever 4, 5 through which the receptacle is suspended from the bent weigh beam 8, 9. The curved end 54 of the intermediate lever is withdrawn from beneath a lever 52 which falls on to a stop 56, whilst the end 5 of the intermediate lever pushes back and liberates a rod 24 connected by a bell crank lever 23 to the main valve 20 and to a lever 47 on the lever 52. The main valve 20 then closes under its own weight. When the weight of liquid is ccmpleted through the small valve 30, the bent wieigh beam 8, 9 rotates and an arm 57 integral with the beam knocks up and liberates a rod 39 connected to a pivoted catch pan 38 which falls to a position beneath the feed valves. The movement of the catch pan allows a counterweighted lever 33 to fall and push up the valve 30 so as to stop the feed. Owing to the rotation of the weigh beam 8, 9 a pin 15 on the receptacle 1 temporarily engages a fixed guide 16 and causes the receptacle to rotate into the lower position, shown in dotted lines, the rotation being arrested by a stop on the receptacle engaging the rod 3. The liquid runs out at the nozzles 11, 12, until the receptacle together with the requisite residue is returned by the counterweight 10. The return movement resets the parts in the position shown in Fig. 1. The arm 57 is connected by a pin 60, loop 62, and lever 63, to a dash-pot 69 for absorbing shock. When weighing grain, the weighing receptacle has a flanged filling orifice 75, Fig. 5, and the outlet 11 leads to an interior receptacle 76 arranged about the axis 2 of rotation. The receptacle 76 retains the residue when the weighing receptacle returns to the charging position. Specification 158,516 is referred to.