US1319132A

US1319132A - Chusetts

Info

Publication number: US1319132A
Authority: US
Publication date: 1919-10-21
Anticipated expiration: 1936-10-21

Description

A. D. ABBENZELLER.

SICKLE BAR..

APPLICATION FILED NOV. 2 4. 1917' Patented Oct. 21, 1919.

112171641X???) flLf PedD.HbTaenze1Ze 1 0 w vvu (77'l'iey- UNITED STATES PATENT o o ALFRED n. ABBENZELLER, on RANDOLPH, MASSACHUSETTS, ASSIGNQR TO unrvnnsnn SICKLE BAR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATIQN or MASSAa oHUsETTS.

. SICKLE-BARl Application filed November 24, 1917. semi No. 203,713; 5

To all whom it mayccmcern Be it known that I, ALFRED D. ABBENZEL- LER, a citizen of the United States, and a" specification, Figure 1 is a sectional top view of a portion of a sickle bar showing blades locked therein. Fig. 2 is a face view of one of the cutter blades. Fig. 3 is a perspective View of a part of the bar, a portion thereof being shown as broken away. Fig. 1 is a cross section of the sickle bar. Fig. 5 is a face view of one of the locking blocks.

The cutter blades 1 are each formed with a dovetail shank 2, and the sickle bar 3 is formed with transverse slots 1 through it for the reception of the shanks, the latter being narrower than the slots, and a locking block 5 beingprovided for driving into the space in each slot not filled by a shank.

For more firmly fastening the blades in place, I prefer to sink the base 6 of each blade quite deeply into the bar 3, as shown in Figs. 1 and 4, and to render the grip of the locking block more secure, to recess the base of the blade at 7, thereby enabling the locking blocks to be substantially longer, and by thus having an elongated gripping surface, to increase the hold.

By thus sinking the blades farther into the bar, and the locking block 5 farther into each blade, I secure greater security and firmness for each block and blade.

To further add to the certainty of the locking blocks remaining firmly in place, I increase the outer edge of each, making the same approximately in the shape of a capital letter L. To widen the main body of the block to an equal extent would serve to weaken either the shank 2 or the base 7 adjacent the block, but by widening the outer edge alone of each block I accomplish the desired objects without said weakening of parts.

Another, and even more important function of the elongation .9-, 'is to; insure against the possibility of any delay or imperfection in fit due to the introduction of a block wrong way around. As soon as a block is taken into the fingers of the workman, he knows instantly its proper position.

For removably locking the blocks 5 in place, I prefer to form each thereof with a hole or recess 10 adapted to be engaged by a slight projection 11 from the thin upper wall 12 of the bar 3, as shown in Fig. 4.

The locln'ng blocks are forcibly removed from their positions, when the blades are desired to be taken out, by means of a suitable tool disposed for engagement with a hole 15 in each block.

In putting the sickle bar together, each blade 1 has its shank 2 introduced through a slot 4:, and a locking block 5 forced into the space .beside the right-hand edge of the shank (as viewed in Fig. 1)-until its recess 10 is engaged by the projection 11.

As shown in Fig. 1, the rear edge of the shanks 2, the outer edges of the locking blocks 5 and an extension 13 of each un- Patented 'Oct. 21,1919;

slotted portion 14 of the bar 3, are all made in approximate alinement.

What I claim is:

1. A sickle bar comprising a bar having numerous transverse slots through it, blades each having a dove-tail shank entering one of said slots, each shank being narrower than its associated slot and each blade having a recess therein at one edge of its shank for prolonging said edge, a locking block for each blade filling the space between said edge and the neighboring end of the slot containing the same for locking the shank and blade in firm union with the bar, and means for retaining said blocks in place, the blocks entering said recesses.

2. A sickle bar comprising a bar having numerous transverse slots through it. blades each having a dove-tail shanklocated in one of said slots, each shank being narrower than its associated slot and each blade having a recess therein at one edge of its shank edge and the neighboring end of the slot containing the same for locking the shank and blade in firm union with the bar. and

means for retaining said locking blocks in place, each of the latter being L-shaped and extended behind the bar, and. the bar being 9 recessed to receive the leg of each locking block. 1

'3, A sickle bar comprising a bar having numerous slots transversely disposed therein, blades having each a dovetail shank entering one of said slots, and a locking block between each shank and the neighboring end of the slot containing it for locking the shank and blade in firm union with the bar, the

locking block having a round hole therein 10 invention, I have hereunto set my hand this 15 15th day of November, 1917.

ALFRED D. ABBENZELLER.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. r V