US1729280A - Corn-binder cutting mechanism - Google Patents

Description

Sept. 24, 1929. E. TIEDEMANN 1,729,280

' CORN BINDER CUTTING MECHANISM Filed Oct. 51, 1927 2 Sheets-Sheet 1 Inventor Sept. 24, 1929. E. TIEDEMANN 1,729,280

CORN BINDER CUTTING MECHANISM Filed Oct. 51, 1927 2 Sheets-Sheet 2 Inventor Jfidkflla 7270,

Patented Sept. 24, 1929 UNITED STATES EUGENE rrE'nEMANN, or MIDDLETON, WISCONSIN CORN-BINDER CUTTING MEGHANISIJI- Application filed October 31, 1927. Serial No. 230,097.

The present invention relates to a cutting mechanism for corn binders and has for its prime object to provide a rotary knife to replace the transverse reciprocating knife now in common use.

Another very important object of the invention resides in the provision of a cutting mechanism of this nature which includes a pair of stationary spaced knives which function as guides and a rotary cutter in cooperation therewith.

A still further very important object of the invention resides in the provision of a mecha nism of this nature which is simple in its construction, inexpensive to manufacture, readily assembled with the conventional structure now found in corn binders, thoroughly efficient and reliable in operation, and otherwise well adapted to the purpose for which it is designed.

Wit-h the above and numerous other objects in View as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing:

Figure 1 is a side elevation of the mechanisin embodying the features of this inven tion,

Figure 2 is a top plan view thereof,

Figure 3 is a bottom plan view of the rotary cutter,

Figure 4: is an enlarged detail vertical section taken substantially on the line 4.& of Figure 1, and

Figure 5 is a perspective View of one of the blades.

Referring to the drawing in detail it will be seen that the numeral 5 denotes a bracket generally found on corn binders in which is journaled the drive shaft 6 having a beveled gear 7 thereon meshing with a bevel pin 8 on a shaft 9 also journaled in the bracket 5. The numeral 10 denotes a cross bar of the conven tional binder. A bearing sleeve 11 has journaled therein the shaft 9 and is provided with an upper bracket arm 12 projecting forwardly and a lower bracket arm 13 extending downwardly and then forwardly. The arm 12 terminates in a bearing 14 and the arm 13 terminates in a plate 15 having a bearing 16 vertically alined with the bearing 14. The plate 15 is bolted or otherwise securely fixed to the frame bar 10 as is indicated at 17. The plate 15, arm 13, sleeve 11, bracket 12 with its sleeve 14 forms a substantially U-shaped arm which is supported on the under side of the frame 10 and the U-shaped arm is so arranged that its entire configuration straddles the rear radius of the cutting blades 23. A pin 18 is journaled in the bearings 14 and 16. The hub portion 19 of a beveled gear 20 is keyed to the pin 18 as at 21. This beveled gear 20 has a peripheral annular flange or extension 22 to the under face of which are fixed a plurality of blades 23, preferably four in number. Each blade 23 is provided with a relatively short arcuate side a and a relatively long arcuate side Z) which is eccentric in respect to the side a and further provided with a relatively long straight edge 0 and a relatively short straight edge (Z, said straight edges being disposed at right angles to each other. When the blade is assembled on the flange 22 by means of suitable fastening elements 24: the straight edges 0 and (Z radiate from the axis of the pin 18 in abutting relation to the adjacent edges of adjacent blades and, the arcuate edge a is concentric therewith. Therefore a portion of the blade projects beyond the periphery of the flange 22 in a substantially tangential manner that is the arouate edge at is substantially tangential to the axis of the pin 18.

A stationary knife 25 and a stationary knife 26 are suitably fixed to the frame 10 to project forwardly therefrom in spaced parallelism in the same horizontal plane. The inner forward portions of the knives 25 and'26 diverge forwardly from each other while the rear portions extend in spaced parallelism. The knife 25 has an opening through which the pin 18 extends but the knife 26 is at one side of the pin so that the blades 23 pass over the space between the rear portions of the knives 25 and 26 as is clearly illustrated in Figure 2, in this figure the blades rotate in a clockwise direction, the arcuate side edges 3) being sharpened. The

inner side edges of the knives 25 and 26 are sharpened the structure of the blades being in quadrants having the edges of adjacent blades in abutment provides a gauge for engagement of a broken blade, permits repairing of a single broken blade, tends to reduce shearing effect on the holders 24; and at the same time provide a gently diverting cutting edge, which efficiently cuts the corn stalks without modification of the cutting knives to grip the stalk while being severed.

As the binder moves forwardly the corn stalks are received between the stationary knives 25 and 26 and guided into the space between the rear portions thereof and the blades 23 in cooperation with the knife 26 severs the stalk, as will be quite apparent.

It is thought that the construct-ion, operation, utility and advantages of this invention will now be quite apparent to those skilled in this art without more detailed description thereof. The present embodiment of the invention has been disclosed in detail merely by way of example since in actual practice it attains the features of ad vantage enumerated as desirable in the statement of the invention and the above description. It will be apparent that changes in the details of construction, and in the combination and arrangement of parts as may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:

1. In a cutting mechanism for corn binders, a transverse frame bar, a sleeve above the bar and to the rear thereof, a shaft journaled through said sleeve, a bracket arm pr0- jecting from the top of the sleeve forwardly and terminating in a bearing with a vertical axis, a bracket arm projecting rearwardly and downwardly from the sleeve and curves to extend forwardly and terminate in a plane having a bearing alined with the first mentioned bearing, said plate being fixed to the under surface of the bar, a pin journaled in said hearing, a beveled gear fixed to said pins, a pinion on said shaft meshing with said beveled gear, an annular flange on said gear, a plurality of blades affixed to said flange, a pair of stationary knives fixed to the frame bar and projecting forwardly therefrom in a horizontal plane in spaced parallelism, the space between the knives be ing to one side of the pin, each blade being formed with a pair of straight ends disposed at right angles to each other and one longer than the other, and a pair of arcuate sides eccentrically disposed to each other and one longer than the other, the shortest arcuate side being concentric with the pin so that the longer arcuate side is disposed substantially tangentially through the pin.

2. In a cutting mechanism for corn binders, a transverse frame bar, a substantially U-shaped arm extending rearwardly at right angles to said bar and having the lower end thereof secured to the under side of said bar, said arm including a pair of sleeves supported thereby, one of said sleeves positioned adjacent the end of the arm on the upper side thereof and above the plane of said bar for supporting said driving shaft, the other of said sleeves positioned at the end of the upper side of said arm for supporting one end of a driven shaft, a bearing on the end of the lower side of said arm in proximity to the junction with said bar for supporting the other end of the driven shaft.

3. In a cutting mechanism for corn binders, a transverse frame bar, a substantially U-shaped arm extending rearwardly at right angles to said bar and having the lower end thereof secured to the underside of said bar, said arm including a pair of sleeves supported thereby, one of said sleeves positioned adjacent he end of the arm on the upper side thereof and above the plane of said bar for supporting a driving shaft, said sleeve 6X- tending obliquely with respect to the plane of said arm, the other of said sleeves positioned at the end of the upper side of said arm for supporting one end of a driven shaft, said sleeve extending vertically with respect to said bar, a bearing on the ends of the lower side of said arm in proximity to the junction with said bar for supporting the other end of the driven shaft, said bearings being co-axial with respect to said vertically disposed sleeve.

In testimony whereof I afliX my signature.

EUGENE TIEDEMANN.

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