US287657A - Chapman e - Google Patents

Description

(No Model.) 7

' 0.3. GAGE. Q GRAIN SCREEN.

No. 287,657. Patented 001;. 30,, 1883.

. a WE ED -HU HD WW E FF WITNESSES: I INVENTOR:

ATTORNEYS;

- UNITED STATES PATENT OFFIC .oHArMAN E. GAGE, on. WHITEHALHWIsOONsIN, ASSIGNOR TO HIMSELF LAND JOHNL. KNUDTSON, or sAMnrLAcn.

GRAIN-SCREEN.

SPECIFICATION forming part. of Letters Patent No. 287,657, dated. October 30,1883. r Application filed June 26, 1883. (No model) .To aZZ whom it may concern:

'Be it known that I, CHAPMAN E. GAGE, of Whitehall, Trempealeau county, Wisconsin, have invented a new andlmproved Grain- Screen, of which the following isa full, clear, and exact description. v 7

My invention relates to improvements in grain-screens; and it consists in the peculiar construction and arrangement of the parts of a grain-screen, as hereinafter more fully set forth, and pointed out in the claims.

Reference is to be had to the'accompanying Jdrawings, forming part 'of this specification, in which similar letters of reference indicate corresponding parts mall the figures.

Figure l is a plan view of I part of a screen constructed in accordance with my invention. Fig. '2 is a side view of the same. Fig. 3 is a rear view of it, and Fig. 4 represents the tongues having .sides along portions of the same. Fig; 5is a detail view of a part of the screen, showing the tongue, undera perforation, elongated and widened.

I take a sheet-metal plate, a, of any approved material, and perforate it by punching down tongues 11 from the upper side to make the openings 0, through which the .wh eatgrains are to escape from theoats, the line of feed of the grain on the sieve being indicated by the arrow of Fig. 1. In advance or in front of the perforationsc, I depress the surface of the plate, as "at e, forming grooves beginning at the back of the preceding perforation, and extending to and discharging into the front side of the next perforation, said grooves gradually increasing in' breadth and depth to the junction with the perforations, which may be either square, concave, or V-shaped on the front side, where these grooves discharge.

The tongues b, that arethrust down from the perforations and project forward under the plate a from the back'of the perforations, are drawn out and elongated or lengthened and widened, and shaped in the curved form represented in Fig. 2, whereby they receive the wheat-grains from above through the perforations and project them forward, while the oats,

the increase inthe width of the tongues which I make by drawing them out by suitably hammering or pressing vthem. In some cases I form the tongues with sides, as shown at 0,

and drawing the metal down back of theslits.

The advantage derived from elongating, widening, and forming sides 0 to each tongue I) of each perforation in the screen is to prevent the oats from passing directly through the screen.

Having thus described my invention, I claim as new and desire to secure by'Letters Patent 1. A sheet-inetal screen a, having perforations 0 and longitudinal grooves e in its upper surface, said grooves extending from one longitudinal perforation to the adjacent one, and tongues b projecting downward and for-- ward from the backs of the perforations, sub-" stantially as described. A g

2. A perforated sheet-metal screen, having tongues b projecting downward and forward from the back of the perforations, said tongues being elongated and widened, substantially as described. 8o

3. A perforated sheet-metal screen, having tongues b projecting downward and forward from the back of the perforations, said tongues being elongated and widened, and having Fig. 4;, by slitting'the edges a shorter distance 60 sides-o a portion of their length, substantially as described.

. OHAPMAN E. GAGE. Witnesses: a

JoHN ROGERSON, E. H.WARNER.

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