US569782A - Grinding-machine - Google Patents

Description

UNITED STATES PATENT Errea PERRY Il. CAZIER, OF NASHVILLE, MICHIGAN, ASSIGNOR TO SCOT MCINTOSH, IIQRACE FARMER, AND ISAAC SPONABLE, OF HASTINGS, MICHIGAN.

GRINDING-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 569,782, dated October 20, 1896.

Application tiled July 13, 1395. Serial No. 555,938. (No model.)

To alzi wiz/0m it may concern,-

Be it known that I, PERRY H. CAZIER, a citizen of the United States,residin g at. Nashville, in the county of Barry and State of Michigan, have invented certain new and useful Improvements in Grinding-Machines, and I do hereby declare the following to be afull, 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 has relation to that type of machines for grinding 1nowinginacl1ine knives wherein the grinder-wheel is carried by a pivoted arm and the knife is carried by a frame capable of movement toward and from. the grinder; and the principal object of my invention is to simplify and cheapeu the construction of the knife-clamp of such machines.

A further object oll the invention is to provide the clamp with a spring which will be capable of pressing said clamp into an inclined position toward the grinder when' the latter is elevated, and with a stop which acts to limit the degree of inclination which the clamp may assume, so as to keep the ends of the knife-teeth from contact with the grinder when the latter is raised, said stop being adjustable for accuracy.

These objects are accomplished by the construction illustrated in the accompanying drawings, in which# Figure l is a side elevation of a device enibodying my invention, and Fig. 2 a plan view of the same.

Like letters refer to like parts in both of the figures.

A is a frame adapted to be secured to the driving-wheel of a mower or other desirable support by means of the downwardly-extending lug A engaging one edge of the Wheel, and the arm C on the sleeve O engaging the other side, said sleeve being longitudinally movable on the screw B and held by the thumb-nut I). The arm C being secured to one end of the sleeve C said sleeve may be reversed, so that it extends inward from said arm, and a greater distance thus secured between the lug Aand said arm. The frame A has an upwardlyextending curved arm A, to which is pivoted at E the arln F having the concave hood Il", to which is secured the hangers F, and on said hangers is journaled the emery-wheel G, covered by said hood and driven by the crank-handle Il through the train of gearing II, journaled on said arm F. By means of the handle I said arm is turned on its pivot to the position shown in dotted lines in Fig. l, and having passed the center said handle will strike the frame A and sup- 6o port the emery-wheel in position to be used in grinding any article desired.

A bell-cran k clamp J is pivoted to the frame A by the rod J said clamp J having an extension J, through. which passes the thumb- 6 5 screw K, adapt-ed to engage at its lower end a ledge on the frame A. On the upwardly-entending arni of the clamp J is the laterallyprojecting guide-arm L, adapted to support the sickle-bar M, said bar being longitudi- 7o nally movable on said arm in a way N in said clamp. The knives O extend upward from said bar between said clamp J, which forms one jaw to hold said knives in position and the other jaw, P, which is V-shaped, said jaw P being secured to said clamp by the thumbscrew Q.. A spring R coiled around the rod J engages the upwardly-eXtending portion of the bell-crank clamp and serves as a springsupport for the same, which will operate to 8o press the upright member of the clamp into inclined posit-ion toward the grinder when the latter is elevated, and will yield to the grinder while the same is being lowered, and thereby hold the knife more tightly against the grinder. The emery-wheel being up the sickle-bar is placed in the clamp and secured therein, said clamp moving inward until the adj ustin g-screw K strikes the frame A. Said wheel is then revolved and at thc same time 9o lowered, and as it strikes the knives the clamp is forced outward against the action of the spring R. The screw K prevents the ends of the teeth from moving inward far enough when the wheel is up to allow said wheel to 9 5 strike the ends of said teeth, and the spring R puts an equal pressure on said knives throughout the stroke. This position of the knives allows the operator to see just how the knife is being ground, and the hood F' keeps roo the emery-dust from iiying. I am also able to turn up the arm to the posit-ion shown in dotted lines and grind any other thing' or tool at pleasure. I also lind it of advantage to run the stone from pointI to heel of the knives by rotating it oppositely to the usual direetion, thus leaving the knives in a better eondition, and I can carry the device on the niaebine and clamp it to the Wheel when used. Having thus fully described my invention, what I Claim is In a grinding-machine for mowing-machine knives, the frame, the pivoted arm, and the `gfrinder supported by said arrn,in Combination with the clamp `for the knife, comprising a bell-Crank pivoted near the free end of its horizontal inembei',a clamp-jaw movable rela- PERRY II. CAZIER.

IVitnesses:

J. J. POWERS, EDITH DINsMoRE.

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