SU10992A1 - Device for automatic determination of individual grain weight - Google Patents

Description

The application of methods of variation statistics to the study of various issues of selection, field cultivation, agricultural machinery, etc., necessitates a massive and sufficiently accurate determination of the absolute weight of individual grains.

The known methods of weighing, as, for example, on an analytical balance, providing the necessary accuracy, are not very suitable for this purpose, since with the most intensive work they allow only 12-15 weighings per hour, while the number of necessary definitions for mass weighing often reaches many thousands of hours.

In the proposed device, the delivery of individual grains to a torsion balance, bringing the latter into equilibrium, marking individual weights using electromagnetic counters, removing weighted grains from the weighing pan and once the separation of weighted grains into separate groups corresponding to certain classes of weights are automatically performed.

In FIG. 1 shows a vertical section of the device, and FIG. 2 - top view.

The weighed grain is poured into bucket A, tapering downwards. The lower hole of the bucket is closed with a hollow disk B with a hole in, positioned so that when the disk rotates, it passes through the grains in the bucket A. The internal cavity of the hollow disk B is connected by channel a and tube b to an air piston pump F. The pump is driven by cam B and is calculated in such a way that at the time the hole of the disk 8 passes through the grain and until the grain is thrown into the weighing pan, a vacuum is created inside the disk, attracting one of the grains and holding it around the hole. At the time of the approach of the grain to the pan of scales, the pump acts as a pumping agent and throws the grain into the pan.

The torsion balance consists of a coil spring n connected by its inner end with a roller e. The outer end of the spring is fixed on the coupling D (Fig. 1 and 2), which rotates freely on the roller E. Coupling D has a gear d (Fig. 2), coupled with the toothed sector at the end of the lever G. The latter lies on the cam B, designed so that the sector begins to rise after the grain is placed on the cup вес of the balance, connected with the roller e of the rocker arm. Lever D, turning coupling D, twists the spring of the balance until the tension is balanced by the grain, after h his cup, P, will begin to rise. Clutch D is connected to the toothed sector E, which, rotating with it, will rotate the gear connected to the contact lever 3. When the contacts are closed, AND, AND, I2 ... Hi-i lever 3 into the battery circuit Cj alternately and solenoids A, AI, AO are sequentially included. . .

designed to actuate the K, Ki, K2 counters. .. Kia To activate a counter that responds to a certain tensioned spring and corresponds to a determined grain weight, the battery circuit Cj remains open until the cup П of the balance starts to rise and is closed only at the moment of lifting it with the rod of the solenoid p, due to the breaking of the battery circuit C. battery circuit C, an electromagnet O is turned on, which simultaneously deflects the contact lever H, which opens the circuit again, eliminating the possibility of other counters operating when lever 3 is further rotated. After turning the muffs You are D at the limiting torsion of the spring, lever D returns cam B to its original position. At the same time the disk knuckle B acts on the lever H, the battery C is closed, and the solenoid pin pi opens the last, due to the battery C being closed by the cup P

The grain is automatically dropped from the weighing pan by either tilting it last, or by a jet of air, or by using an automatically operated brush. The dropped grain falls on an inclined plane m into one of the holes g of the rotating cylindrical box U, which sits on a vertical roller o, driven in rotation from the main roller of the device through a pair of bevel gears T, and with gear 1.

The box is connected to a roller with a spring h. There are 12 recesses u on the circumference of the box, against which there is an electromagnet T ,, a holding rod w with a spring. The electromagnet T is included in the circuit of the battery C. At the moment of opening of this circuit, the electromagnet releases the wand and the last one, the entry point n, stops the box with a certain opening g under. by the inclined plane, m, and the roller continues to rotate, twisting the spring h.

The upper openings of the box U are connected by channels with the lower openings of the box g, which are closed by swiveling bottoms c and automatically open only at; the position of the box U relative to the table U) when each of the holes r coincides with the corresponding opening of the table. After dropping the grain from the cup P and lowering it last, the battery circuit C closes and the electromagnet T depressing the wedge w will release the box U which, under the action of the spring h, will come to its original position relative to the roller o. The weighing operation of each grain takes place in one revolution of the main roller, which can be brought into rotation by an electric motor.

The subject of the patent.

A device for automatically determining an individual grain weight. Distinguished by use; a) a bucket A with a hollow disk B located at the bottom outlet

equipped with a hole in and serving to drop the grain into the weighing bowl P using a pump F, the forcing and rarefying action of which is matched with the moments of the hole passing through the grain and the time of dropping the grain into the cup P, b) of the electric weight mechanism consisting of a coil spring n, its inner end is connected with the roller e, and the outer end with coupling D, which rotates freely on the roller e and is connected to the EZ gearing system with a series of solenoids L, L, ... with counters KD ... and a gear d, coupled with zubchat the sector of the lever G lying on the cam B, intended for alternately raising and lowering and thereby periodically opening and closing the current in battery C, and c) a rotating cylindrical box Y with holes r serving to receive the grain falling from the cup II and equipped with 12 recesses 5, designed to keep it in a stationary state with a rod w when sweeping grain from the cup II into the holes in the city.

f and g. 1