US513659A - Grain-weigher - Google Patents

Description

(No Model.)

H. A. STOCK.

- GRAIN WEIGHER.

No; 513,659. Patentgd Jan. 30, 1894.

WWW

m. 8 E W n w UNITED STATES PATENT OFFICE.

HARRY A. STOCK, OF MILLERSBURG, PENNSYLVANIA.

GRAIN-WEIGHER.

SPECIFICATION forming part of Letters Patent No. 513,659, dated January 30, 1894.

Application filed March 27,1893. Serial No. 467,3Z (N0 model- To all whom it may concern:

Be it known that I, HARRY A. STooK, a citizen 0f the United States, residing at Millersburg, in the county of Dauphin, State of Pennsylvania,have invented certain new and useful Improvements in Automatic Grain-lVeighing Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings. My invention relates to apparatus for weighing or measuring grain and other substances; and the objects of my improvement are to provide a simple and inexpensive apparatus of this class capable of responding quickly to the desired limit of weight of grain poured therein, the device possessing great sensitiveness and capacity for correctly weighing grain and other seeds. I attain these objects by the construction illustrated in the accompanying drawings, in which Figure 1, is a perspective view of a grain weighing scale constructed in accordance with my invention. Fig. 2, is a transverse vertical section of the same showing the grain bin swung partly to one side. Fig. 3, is a longitudinal vertical section of a portion of the upper hopper and grain bin showing the adjustable bearing of the latter. Fig. 4, is a perspective view of said adjustable bearing attached to a portion of the end wall of the grain bin.

In the drawings A represents the frame at each end of the apparatus. Said frame is preferably in the form of the letter X with a ring A forming the junction of the upper diverging branches with the diverging legs thereof. Each leg is provided with afoot having a screw tapped perforation therein, in which is placed a screw bolt a the point of which rests upon the ground or upon a suitable base, so that the vertical axis of the apparatus can be made to occupy a perfectly vertical position. The upper hopper B of the device is preferably made to rest with its ends within the crotch between the upper branches of the frame. The lower end of the hopper is made relatively narrow to easily and rapidly control the iiow of grain made to pass therethrongh, and in said lower end there is a bottom plate I) havinga series of successive openings b arranged in a row or rows, the

size of which openings is regulated by means of a plate 0 having also openings 0 Said plate 0 is made to slide longitudinally to regulate the size of the openings 6 but it may be made to slide transversely for the same purpose. The plates Z) and c are made in the form of inverted shallow curved troughs, the curvature of which corresponds with the curvature given to the end boards or plates D of the twin weighing bins D of the apparatus, the upper edge of the central plate D dividing said bins terminating upon the curvature of the plates D and also the upper edge of the side plates D Thelatter have their upper portions pivoted at,or close to, their upper edges, at (Z to the end plates D, and have their lower portions retained adjust-ably to said end plates, by means of flat lugs d that are secured to the plates D and are slotted to receive a clamping bolt or screw (1 By these means the size of each bin is regulable according to the nature of the grain used in the apparatus, as it is desirable that each bin should be filled substantially up to the level of its pivot before it has received the proper weight to be tilted, to obtain a close and correct weighing of the material. To obtain this desideratum it is also importantthat the pivotof thebins should be as near the top thereof as possible. I have found by experiments that the position ofsaid pivotshould be at such distance from the upper curvature of the plates D that the radius of said curvature should be substantially equal to the width of the opening in the bottom of the upper hopper B, and that the bottom D of the bins should describe an arc of nearly ninety degrees.

In the drawings Fig. 2, has been placed too close to Fig. 1 and the bins are not represented as at one end of their oscillation.

To prevent some kinds of spherical seeds or grain from advancing too far under the bottom edge of the side plates D while each bin is being filled and its contents weighed, a strip of flexible leather d is secured to said plates D and made to extend below said edge.

To prevent the tilting-of the bins until the proper weight of grain has been received into either one of them, an angular bent rodEhas one end secured adj ustably to each end plate D of the bins, and it carries on its upper portion a weight F adjustably retained thereon by means of a clamping screw f. Said upper portion can be regarded as a scale beam and is marked with division lines f indicating pounds or bushels or parts thereof, as the case may be.

To provide a nearly frictionless support for the twin-bin, each one of its supporting rods E is provided with an internally conical bearing E on its under side in which is received the hardened conical point of a bolt a that passes through a screw-tapped hole in the bottom of the ring A of the frame. Said bolts also permit the distance between the upper edge of the bin and the bottom of the hopper B to be regulated. To properly adjust the twin bins laterally on this pivot so that the tendency of each bin D to be tilted will be exactly the same, the inner end of each rod E is secured to a plate E that has its top and bottom edges beveled and is received in a dovetailed groove formed in a plate D attached to the outer face of the plates D, close to their upper curvature. The plate E is retained in position by means of screws e passing through horizontal slots in the plate E and having their inner ends in engagement with the plate D.

To prevent the twin bins from tilting too far, pins (1 project outwardly in the path of the scale beams E, from the upper end of the frame A. But said pins 0. may be dispensed with, as the tilting motion of the bins is utilized to operate the registering apparatus of the device. For this purpose a longitudinally movable bar g is guided horizontally within bent metal straps a secured to one of the end plates of the hopper B. Said bar 9 has either of its ends bent outwardly or has pins g projecting therefrom near the ends thereof, and said pins project in the path of the scale beam. The bar 9 is thus slid endwise by said beam until arrested by one of the pins 9 striking against the side of one of the metal straps a The bar g has pivoted thereto near its center a pawl h, the lower end of which is adapted to engage with a ratchet wheel which is the first wheel operated upon in the train of gears of a registering apparatus of ordinary construction. Said train of gears is not shown in the drawings. I

The grain escaping from either one of the tilted bins is received in a hopper H supported by the frame, and by which the grain is led into bags or in any suitable direction.

Having now fully described my invention,

I claim- 1. A grain weighing scale consisting of a hopper having an arched bottom, tilting twin bins having permanently open outlets and their pivots adjacent to the top thereof at a distance from the bottom of the hopper substantially equal to the width of said bottom, and a frame supporting the hopper and bins substantially as described.

2. In a grain weighing scale, the combination of a hopper having an arched bottom provid ed with perforations and a perforated plate upon said bottom, tilting twin bins, the end plates of which have a convex top and pivot pins at a distance from said top substantially equal to the width of the bottom of the hop per, and plates D pivoted to the end plates adjacent to their convex top and their bottom laterally adjustable substantially as described.

3. In a grain weighing scale, the combination of a hopper, tilting twin bins having sides D provided with a convex top, side plates D pivoted thereto and having their lower ends laterally adjustable, leather strips secured to the lower edge of said plates D and a horizontal plate D constituting the bottom of said bin, with a supporting frame substantially as described.

4. In a grain weighing scale the combination of ahopper, atilting twin bin thereunder, a dovetailed plate D secured to the end plates of said bin, a plate E adjustably secured to the plate D, an angular bent scale-beamhaving its lower end secured to the plate E a conical bearing on the under side of the scale beam a bolt having its conical end secured into said bearing and a frame adj ustably supporting said bolt substantially asdescribed.

5. In a grain weighing scale the combination of a hopper, a tiltingtwin-bin thereunder, an angular bent scale-beam adjustably secured to said bin, a longitudinally movable bar g retained in bearings attached to the ends of the hopper adjacent to its top, pins 9 projecting from said bar g and a pawlpivoted to said bar substantially as described.

In testimony whereof I affix my signature in presence of two witnesses. I

HARRY A. STOCK.

Witnesses:

OHAs. W. DAY, S. N. KAWEL.

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