US690251A

US690251A - Cutter-bar.

Info

Publication number: US690251A
Application number: US3579900A
Authority: US
Inventors: John J Ellsworth
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-11-08
Filing date: 1900-11-08
Publication date: 1901-12-31
Anticipated expiration: 1918-12-31

Description

Patanted Dec. 3|, I901. i

No. 690,25l.

J. J. ELLSWURTH.

CUTTER an; 7 Application fllad Nov. 8, 19 00;)

(In Modal.)

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WITNESSES: INVENTOR. yr 44 z yw w Th2 mums versus 00. wummma, WASHINGTON. 0, c4

UNITED STATES PATENT OFFICE.

JOHN J. ELLSlVORTH, OF EAST TAWAS, MICHIGAN.

CUTTER-BAR.

SPECIFICATION forming part of Letters Patent No. 690,251, dated December 31, 1901.

Application filed November 8, 1900- Serial No- 35,799. (No model.)

T0 at whom it may concern.-

Be it known that I, JOHN J ELLSWORTH, a citizen of the United States, residing at East Tawas, in the county of Iosco and State of Michigan, have invented certain new and useful Improvements in Cutter-Bars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to cutter-blades for mowing-machines.

The object is to produce a blade that can be readily attached to the cutter-bar, having means for supporting and guiding the rear part of the blade, and so constructed as to be simple and capable of being manufactured economically and at small cost.

My invention is illustrated in the accompanying drawings, throughout the several views of which similar characters of reference designate corresponding parts and devices.

Figure 1 is a top view showing part of a cutter-bar with some of the blades in place. Fig. 2 is a back view of the same. Fig. 3 is a perspective detail of a single cutter-blade. Fig. 4 is an end view of the driving-head. Fig, 5 is a sectional view of a blade having a rearwardly-projecting lip or flange. Fig. 6 is a perspective detail of a blade with the socket partly formed.

As is clearly shown in the drawings, the device consists in a bar 1, of steel or other suitable material, preferably rectangular in crosssection, one end of which is bent upwardly, as shown in Fig. 2, and is provided with a threaded hole to receive a clamping-screw 1, which is provided with a set-nut 1 The driving-head 2, to which the knife-operating mechanism is attached, is provided with alongitudinal slot 2, permitting the head to slide along the bar 1. Each blade consists in the usual beveled knife 3; but instead of being secured to the bar by bolts or rivets the blade is formed with a slot 3 produced by bonding the rear part of the blade, as shown in Fig. 3, whereby the blade may slide along the bar 1. The full complement of blades fills the bar from the driving-head to the outer end, where a pin 1 is passed transversely through the bar to hold the blades in position. 4 is a rearwardly-projecting lip formed by cutting a U-shaped slit in the back of the v knife and bending up the lip to form a support for the rear edge of the blade. In practice the projecting lip rests upon a longitudinal gnide-barsecured to the knife-supporting frame of the mower.

Tightening the screw l rigidly clamps the blades together, at the same time putting the bar 1 under tension. The set-nut 1 prevents the screw 1 from loosening.

By the means above described I have produced a cutter that is strong, having no holes through the blades or bar for rivets or like fastening devices. Any blade can be easily and quickly removed or replaced without cutting rivets or unscrewing bolts, as is necessary with the common forms of blade-fastenings. If the bar is injured or broken, the blades can be readily removed and mounted on a new bar without drilling or fitting holes, and each knife can be detached from the bar and be sharpened separately upon an ordinary grindstone, thus avoiding the necessity of a specialgrinding-machine for dressing the blades on the bar.

What I claim is- A knife for cutter-bars,consisting of a sheetmetal' blade the rear end of which extends back over the cutter-bar; a socket for receiving the bar, formed by bending the rear part of the blade downwardly, forward along the under side of the cutter-bar and up to the under side of the cutter-blade; a rearwardlyprojecting lip formed by cutting a U-shaped slit in the back wall of the socket and bending up the lip to form a support for the rear edge of the blade, substantially as described. In testimony whereof I affix my signature in presence of two witnesses.

JOHN J. ELLSWORTH. 4

Witnesses:

E. L. KING, A. E. SHARPE.