US1017697A - Pick-sharpener. - Google Patents

Description

s J. N. SMOTHERS & J. N. CARROLL.

` ,1911. Y 1,017,697. Patented Feb. 20, 1912.

UNITED STATES PATENT OFFICE.

JOHN N. SMOTHERS AND JOI-IN N. CAR-ROLL, OF MORTONS GAP, KENTUCKY.

PICK-SHARPENER.

To all whom it may concern;

Be it known that we, JOHN N. SMoTHERs and JOHN N. CARROLL, both citizens of the United States, and both residing in M ortons Gap, in the county of Hopkins and State of Kentucky, have invented certain new and useful Improvements in Pick-Sharpeners, of which the following is a specification.

This invention relates to dies for giving form to the ends of the picks employed in coal mining machines. These picks are subjected to such great wear and hard usage as necessitates frequent re-forming and sharpening of the notched cutting or punching end, and it is the object of the invention to provide an inexpensive and easily operated means whereby the re-forming, notching and sharpening may be done in any shop litted with a forge and hammer competent to operate a pair of dies.

In the accompanying drawings,-Figure l is a perspective view of a pair of dies mounted in a power hammer and with a pick in position to be operated on the dies. Fig. 2 is a perspective view of the lower die block with the'cutter shown in dotted lines. Fig. 3 is a perspective view of the cutter detached from the die.

The dies of the present invention are adapted for operation by any ordinary power hammer and as shown in Fig. 1 of the drawings, A indicates the anvil and B the movable head of-a hammer. The dies indicated generally by C and D are usually formed of machine steel and are of such shape that they may be readily machined. Each die has a dovetail projection c whereby it is secured in position and portions of the complemental faces of the twodies indicated by the reference letters C and D are of slightly convex form and adapted to spread and flatten the ends of the picks. At one side ofthe convex portion D the lower die is formed with a transverse channel d and at one end of the channel with recessed seats al adapted for the reception of the laterally projecting wings E of a V-shaped cutter E.

The cutter is held in place by bolts F extending through the die body and adapted to clamp the wings of the cutter firmly in their seats while the V-shaped central portion of the cutter extends into the channel, as best shown by the dotted lines in Fig. 2.

Specification of Letters Patent.

Application filed July 19, 1911.

Patented Feb. 20, 1912. Serial No. 639,319.

Then ready for use, the cutting edge f is level with the face of the die and the upper die is provided with a flat face arranged opposite the cutter as will be readily understood from Fig. l. The lower edge of the cutter preferably seats squarely on the bottom of the channel and, should it become necessary, because of wear, to adjust the cutter a shim of sheet metal may be placed under it. To permit of such adjustment the bolt holes f2, are slightly elongated in a vertical direction as best seen in Fig. 3.

The construction of the die and cutter are such that the cutter may be made of metal best calculated to keep its shape and edge when heated, for instance, the socalled selfhardening steel, while the body of the die may be made ofl metal capable of being easily machined.

In using the dies, the pickis heated redhot, placed on the convex surface of the anvil die, and by a single or successive blows of the movable die is reduced in thickness and spread to the desired degree. The spread end is then brought into position with the body of the pick in line with the channel and the flattened end over the-cutter, substantially as shown in Fig. l. The blows of the upper die drive the pick down into the channel and cause the cutter to remove a small V-shaped section of the metal from the end of the pick. This gives the pick the required forked end and leaves it in such form as to require practically no further shaping or finishing other than the usual tempering.

It will be observed that the V-shaped cutter which is in the form of a relatively thin blade extends into but not through the channel UZ, the apex of the cutter being arranged between the side wall of said chan nel and when the hammer B descends it will cause a V-shaped piece to be cut from the pick without spreading the points of the pick as would be the case if the side walls of the channel were not arranged as shown.

l. A die for forming the forked ends of mining picks, provided with a transverse channel with parallel side Walls and a cutting blade having a V-shaped portion projecting into but not through said channel with its apex disposed between the side walls thereof, and side Wings extending from said Vshaped portion and attached to the ontside of the die.

2. A die for forming the forked ends of mining picks, provided With a transverse channel with parallel side Walls, and a cut-- ting blade having a V-shaped portion arranged in said channel with its cutting edge substantially level with the face of the die and its apex disposed between the side Walls of the channel, side Wings extending laterally from the V-shaped portion, and means JOHN N. hSMOTHERS. JOHN N. CARROLL.

mark

itnesses R. G. HART, GEO. STORES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

Images