US1734412A - Grain weigher - Google Patents

Description

Nov. 5, 1929.

A. W. WESSMAN GRAIN lWEIGHER Filed April 6. 1928 2 Sheets-Sheet. l

Nov. 5, 1929. A w; wEssMAN 1,734,412

GRAIN WEIGHER Filed April 6. 1928 2 sheets-sneer 2 Patented Nov. 5, 1929 ARNT WILHELM WESSMAN, F' CHICAGO,

imrNoIs, AssmNo'R To INTERNATIONAL HARVESTER COMPANY, A CORPORATIONv 0F NEW JERSEY GRAIN WEIGHER:

Appli-cation med April e, 192s. serial No. 267,825.

The invention relates to grainweifghers .de -V signed for use in connection withthreshing machinery.

Particularly, ther invention has todo with an automatic grain weigher whereina' double hopper or receiver receives predetermined', uniform charges ofv grain, or the like, the weight of the charge causing the receiver to move downwardly and also to swing or oscillate. The down movement, being against a counter-balance, determines the weightv of the charge, and the oscillatory movement insures an alternate supply to the compartments comprising thefdoublehopper. These compartments are provided with doors alternately controlled tof open'` for discharging the weighedl charges or loads of'gr-ain.

The object of the invention is to provide an improved gra-in weigher structure of the type mentioned'. y Y l Generally,y the invention consists incertain features of construction and combination of parts' as hereinafterl described and claimed. In order that these features may be fully understood, reference' ismade to the accompanying sheets of drawings, wherein:

Figure 1 is a general side elevational view of the improved weigher in combination with a thresher, elevator, and discharging mech-V anism;

Figure 2 is a similar view with the compartmented hopper appearing in section;

Figure 3 is a front, or end view elevatlon; and

Figure 4 is a top plan view.

In these drawings, a threshing machine is shown at having an upright elevator 11 provided with a stationary discharge spout 12. Obviously, the invention about to be disclosed is equally applicable for usel with elevators of different kinds, and the form depicted in the drawings is, therefore, merely by way of example.

Adjacent its upper end, the elevator carries on each side, a plate 13 provided with pivot pins 14 for pivotally carrying a rectangularly shaped scale beam 15, said beam being bifurcated at one end to form arms 16 embracing the discharge end of the spout 12, as shown. The opposite end of the beam carries av fixed weight 17 and along one side a slidable or adjustable weight 18.

One side of the discharge end of the spout 12 carries a plate 18 having a rounded under side 19 and flattened ends 20. The pur` pose of this plate will later appear. The iopper structure and the manner of its mounting will next be described.

The free ends of the arms 16 each carry a pivot pin 21 to which are connected a pair of triangularly-shaped hangers 22, there be mg one such hanger on each side, as shown. The lower ends of these hangers terminate 1n spaced legs or arms 23. The arms 23011 the hangers nearest the elevator 11 are pivotally connected to aforked arm`24 in turn lpivotally connected to said elevator. These v angers 22 carry a-shaft 25 on which is mounted adjacent each hanger a bracket 26,v each bracket being provided with two, diverging, upstanding arms 27. These bifurcated brac ets 26 are secured to the end walls 28 of a polygonally-shaped,weigher hopper 29. In this manner'the hopper is carried by the scale beam underneath the dischargev spout 12.-

Thishopper, which constitutes the weighing or measuring receiver, is provided with a central partition wall 30- running length- Wise to dividesaid hopper into two substantially equal compartments A and B. When this hopper is empty, it is in equilibrium on the scale beam. with thek counterweights and, as a result, the .partition wall 30 is substantially vertically disposed under substantially the exact center of the delivery spout 12 discharge end. The compartment A is providedl with a grain receiving port 81 at its top, and, at its bottom, it is provided rwith a discharge port 32. Similarly, the compartment B' has a receiving port 33 and a discharge port 34. Each of these discharge portsis adapted tobe closed by a door, said doors, however, it is to be noted, not being carried loyfy the hopper, as Y will? now appear. Each leg 23 of the hangers 22 has doors pivotally. connected thereto, the door being for the port 32, and the door 36 being for the port 34; The door 35fis additionally pivotally connected to alink 37 which in turn is pivotally connected to the upper, free end of one of the arms 27, while the other door 36 is similarly supported by a link 3S from the other arm 27, as shown.

Underneath the weighing hopper, the thresher carries an unloading conveyer 39 provided with a hopperlike receiving funnel 40. This structure receives and carries away the weighed quantities of grain.

The back end of the hopper carries an upright arm 41 provided with a free running roller 42 adapted to engage the ends 20 of the plate 18, or to roll under the rounded edge 19 of said plate for a purpose presently to appear.

In operation we may assume that the weighing and measuring hopper has been tilted to the position shown in Figure 2 with the port 38 of the compartment B in position to receive a charge of grain from the spout Vl2. The hopper will be held in this position by engagement of the roller l2 with a flat end 2() of the plate 18, as shown. In this position, the oscillation of the hopper to the position now being considered has caused the link 3S to hold the door 3G closed. Grain is 'flowing into the compartment B, and, when a predetermined weight or amount thereof has accumulated in said compartment, the scale beam l5 is overbalanced, causing the entire hopper to descend, which disengages the roller l2 from the left hand end 2O of the plate 1S. Vith the hopper thus unlatchcd, the preponderant weight on one side causes the hopper to oscillate, as will be clear. The roller then rides under the plate I8 and the hopper tilts to swing the receiving port of compartment B away from the spout I2. At the same time, the door 36 is opened to permit the contents of compartment B to discharge into the funnelv 40. In the meantime, compartment A has tilted to receiving position with its door 35 closed. The outflow from compartment B quickly relieves the overhalance of the scale beam, causing the hopper to ascend with the roller 42 now locking over the other liat end wall 2O of the plate to hold compartment A in receiving position. Thus, the operation` will progress, one compartment being lilled until the scale beam is over balanced, then the hopper automatically oscillating itself to cause the filled compartment to be discharged and the unfilled compartment to be charged until it, in turn, is lilled, then another oscillation with similar results, and so on. If desired, any approved form of counting device may be associated with this mechanism to register the number of measured units of grain which ,have passed through the weighing hopper.

It is the intention to cover all such changes and modilications of the form herein disclosed as do not materially depart from the spirit and scope of the invention as hereinafter claimed.

What is claimed is:

l. In a weigher, the combination of a scale beam fulcrumed on a support, hangers carried by said beam, a shaft carried by the hangers, a hopper, brackets carried by the hopper and rockably mounted on the shaft, a

late on the support, said plate having a rounded bottom and a flat end, and a roller carrying arm secured to the Vhopper for cooperating withsaid plate to hold the hopper against rocking movement.

2. The combination with an elevator have ing a iiXed spout, of a scale beam fulcrumcd on the spout, hangers depending from the beam and pivotally connected to the elevator, a rockable hopper carried by the hangers, a latch plate on the spout including a fiat end and round bottom, and a roller carrying arm on the hopper cooperable with the plate to prevent rocking movement of said hopper.

3. The combination with an elevator' having a fixed spout, of a scale beam fulcrumed on the elevator and carrying a pair of hangers which in turn are pivotally connected to said elevator, a double compartment hopper rockably carried by the hangers, said hopper coinpartments having charging ports underneath the spout and discharging ports at their bottoms, brackets on the hopper, doors for the discharge ports pivotally carried by the hangers, links pivotally connecting the doors to the brackets, a latch plate on the spout, said plate having iat ends and a rounded bottom, an upstanding arm carried by the hopper, and a roller on the arm, said roller adapted to cooperate with the latch plate to hold one of the compartments in a position to communicate with the elevator spout.

In testimony whereof I affix my signature.

ARN'I VILHELM WESSMAN.

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