US1026265A

US1026265A - Seed-corn grader.

Info

Publication number: US1026265A
Application number: US53105509A
Authority: US
Inventors: Charles Hunnicutt
Original assignee: CHARLES HUNNICUTT Co
Current assignee: CHARLES HUNNICUTT Co
Priority date: 1909-12-02
Filing date: 1909-12-02
Publication date: 1912-05-14
Anticipated expiration: 1929-05-14

Description

3 SHEETS-SHEET 1.

WITNESSES til/W ATTORNEYS WITNESSES C. HUNNICUTT.

SEED CORN GRADER.

APPLICATION mum DEC. 2, 1909.

Patented May 14, 1912 3 BHEETSBHEET 2.

INVENTOR 01175255 Hu/v/v/curr,

' ATTORNEYS cOLUMRIA PLANUGRAI'I! c0.. WASIIINO'Iu. .0

G. HUNNICUTT. SEED CORN GRADER. APPLICATION FILED D110. 2, 1909.

1,026,265. Patented May 14, 1912.

8 SHEETS-SHEET 3.

WITNESSES /Zf/Mq. W

uvmvron 6mm 5 f/wwwau 7 r,

COLUMBIA I'L'VJOGIIAI'H CU.,WASIIINOTON. D. C.

UNITED STATES PATENT OFFICE.

CHARLES HUNNICUTT, OF WILMINGTON, OHIO, ASSIGNOR TO THE CHARLES HUNNI- CUTT COMPANY, OF CLINTON COUNTY, OHIO, A CORPORATION OF OHIO.

SEED-CORN GRADER.

To all whom it may concern Be it known that I, CHARLES HUNNI- CUTT, a citizen of the United States, and a resident of Wilmington, in the county of Clinton and State of Ohio, have invented certain new and useful Improvements in Seed-Corn Graders, of which the following is a specification.

My invention is an improvement in that class of corn graders in which two perforated screens are employed, one being arranged above the other and both supported and held in a suitable frame adapted to be held and manipulated manually.

The novel and distinguishing feature of this present invention is the construction of the two frames in which the perforated screens are held in such manner that they are readily separable, means being provided for holding them detachably.

The details of construction, arrangement and operation of parts will be hereinafter described and are illustrated in the accompanying drawings, in which:

Figure'l is a perspective view, showing the two parts of the grader separated from each other; Fig. 2 is a side view of the grader; and Fig. 3 is a vertical cross section of the same on line 33 of Fig. 2; Fig. 4 is a perspective view of a modification; and Fig. 5 is a cross section of the same on line 55 of Fig. 4:.

I will first describe the invention shown in Figs. 1 to 3. The upper or top screen A is constructed of sheet metal and attached to the under side of a rectangular. frame composed of side bars 1 and end bars 2. The lower screen B is attached to the under side of a frame which incloses three sides, or, in other words, is open on the front side. Said frame is composed of the side bars 3 and end bar 4. The upper screen A is corrugated lengthwise and provided with a series of rows of elongated rectangular openings a. The lower screen B is also corrugated and provided with a series of rows of narrow rectangular openings 6 and circular openings 1). When the two parts of the grader are connected as shown in Fig. 2, the upper frame and screen are seen to be considerably shorter than the lower one and that the outer portion of the lower screen B is imperforate where it eX- tends beyond the upper frame. It will be further seen that the side and rear end Specification of Letters Patent.

Application filed December 2, 1909.

Patented May 14, 1912.

Serial No. 531,055.

bars of the upper frame lie directly upon the corresponding bars of the lower frame. The two portions of the grader are connected by means which permit them .to be readily detached or separated from each other. In this instance I prefer to employ hooks 5 which are pivoted to the side bars 1 of the upper screen frame and adapted to engage eyes 6 fixed in the side bars 3 of the lower screen frame. For the purpose of holding the two frames so that one cannot move laterally or endwise upon the other, I provide dowels 8 which are fixed in the lower frame and enter corresponding holes or sockets in the side bars of the upper frame. The frames and screens are made separable in order to permit the convenient and speedy removal of seeds which may have become wedged in the perforations of the screens. The upper screen will hinder the passage through its perforations of kernels which are abnormally thick and irregular in form, and hence not well adapted to be used as seed. The abnormally thin kernels which may be of maximum width will pass through both screens. The kernels which may have a suitable or desirable thickness and yet are too narrow will pass through both screens. The normal kernels which are best adapted for seed and which pass readily through the perforations a of the upper screen will be intercepted by the lower screen and thus be saved for seed. Thus the upper frame which serves as a hopper receives the corn to be graded and when the operation is completed those kernels which are found free on the lower screen will be of the uniform size and shape desirable for use as seed. Thus it will be seen that the upper screen grades for thickness and irregularity of width of kernels, while the lower screen grades for thinness of kernels. The circular openings 1) of the lower screen grade for width of kernels and the narrower oblong openings 1) allow the passage through them of broad kernels that are abnormally thin. It is essential that the openings in the upper screen shall be of greater length than the diameter of the circular openings 6 of the lower screen, but no greater width.

In the modification shown in Figs. 4 and 5 the upper screen is attached to a rectangular frame as in the previously described form of the invention, but the lower screen B is constructed with integral metal sides 9 and 10 having the top edge inturnedto form a flange 11. The'upper screen frame is slidable endwise in the

lower frame

9, 10, 11, and is thus removable at theopen end of the latter.

What Iclaim' is:

1. In a corn grader, an upper rectangular frame, and a screen attached at its edges beneath the frame and having coarse perforations extending longitudinally thereof'; combined with a lower'frame comprising an end .pi'ece standing beneath one end of the upper frame'and two side pieces standing beneath its sides and projecting beyond their otherends, a second screen at tached to the three parts of this lower frame provided with finer perforations e22 tending longitudinally thereof and located "below the" perforated area of the upper screen, an imperforate portion of said secand screen extending beyond the end of the upper screen and between the projecting portions of the side pieces of the lower frameto form'a spout, and means for detachably connecting the two frames.

2. The corn grader formed of two separable parts, to wit, a lower metal perforated screen having its sides and rear end 30 extended upward and provided with a bent top flange, and an upper perforated screen having'a rectangular frame adapted to slide in the lower one, substantially as shown and described.

3. In a corn grader, the combination with upper and lower rectangular screens corrugated longitudinally and in parallelism and having differently sized perforations extendinglongitudinally in the valleys of 4 their 'corrugations, the lower screen being continued beyond the upperat one end into a corrugated imperforate spout; of a frame, in two parts detachably connected, upperinclosing the perforated area of the 45 upper screen and rising above it, and the lower part connecting one end and both edges of the lower screen and projecting forward to form the sides of said spout.

CHARLES HUNNICUTT.

Witnesses:

C. E. KINZEL, H. Gr. CARTWRIGHT.

Copies of this patent may be obtained for five centseach, by addressing the Commissioner of Patents,

Washington, D. G.