US941484A - Coal-puncher-sharpening machine. - Google Patents

Description

J. B. & W. W. WORD. GOAL PUNGHER SHARPENING MAUHINE.

APPLICATION FI LED FEB. 20,1909.

Patented Nov. 30, 1909.

. WITNESSES.

J. B. & W. W. WORD. COAL PUNGHER SHARPENING MACHINE. APPLIOATION FILED PEB.20, 1909.

941,484. Patented Nov. 30, 1909.

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JOHN B. WORD AND WILLIAM W. WORD, OF SAN FRANCISCO, CALIFORNIA, ASSIGNORS TO WORD BROS, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF CALIFORNIA.

COAL-PUNCHER-SHARPENING MACHINE.

Specification of Letters Patent.

Patented Nov. 30, 1909.

To all whom it may concern:

Be it known that we, JOHN B. WORD and WILLIAM W. WORD, citizens of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Coal Puncher Sharpening Machines, of which the following is a specification.

Our invention relates to that class of toolsharpening machines, in which the operation is efiected by and between suitable dies, to one of which pneumatic power is applied to effect the necessary pressure on the tool sur-' faces.

Our invention is particularly intended for the sharpening of those tools used in coalmining, for undercutting the ledge, and commonly known as coal-punchers or coalpuncher picks. These tools are fish-tail like bits which, from the hard usage to which they are subjected, quickly get dull. Their cutting surfaces, from the shape of the tool, are rather hard to reach and to sharpen by ordinary methods and means; and it, therefore, becomes a desirable object to provide a means by which they can rapidly and economically berestored to shape and their edges sharpened.

This is the object of our invention, and to this end, our invention consists in the novel dies and in their pneumatic operation and control, which we shall hereinafter fully describe by reference to the accompanying drawings in which Figure 1 is a side-elevation of our machine. Fig. 2 is a front-view of the same. Fig. 3 is a section on line w-w of Fig; 5. Fig. 4 is a longitudinal section of the body of the valve-casing. Fig. 5' is a longitudinal sectional elevation ofthe controlling-valve of the machine. Fig. 6 is a perspective view of the valve proper. Fig. 7 is a front view of the dies. Fig. 8 is a section of the same on the line yy of Fig. 7, the lower or anvil die being shown in side-elevation. Fig. 9 is a view of the coal-puncher, which is the tool to be sharpened by our machine.

1 is a stand for the machine.

2 is the base plate, 3 is the anvil and 4 is the column of the machine. The column 4 carries a pneumatic hammer, of which 5 is the cylinder. In the lower end of this cyllnder is fitted to slide the stem 6 of the upper or hammer die 7. The upper end of the die stem lies in position to be struck by the hammer, within the cylinder.

Seated in the anvil is the lower or anvildie 8. Secured to the side of the anvil is the casing 9 of the controlling valve, to be presently described. The stem 10 of this valve extends through the lower end of the casing 9 and is connected with a rod 11, the lower end of which is connected with a crank 12 on a rock-shaft 13, to which is fitted a treadle 14.

15 is the inlet for the compressed air to the valve casing 9.

16 is the outlet connection from the casing to the cylinder 5 of the pneumatic hammer.

17 in Figs. 3, 4 and 5, is the outlet to a passage 18, shown in dotted lines in Fig. 1, made in the anvil, the upper end of this passage opening under the lifting pin 19, seated in the anvil. The upper end of this pin bears under a lug 20 on the back of the ham1ner-die 7.

In the valve casing 9, between the outlets 16 and 17 is an exhaust port 21, seen in Figs. 4 and 5.

The valve 22, as seen in Figs. 3, 5 and 6 is a sector, formed with a square groove 22, to fit, without turning, upon the flattened sides of an enlarged portion 23 of the stem 10. This portion 23, has its fiat sides, as seen in Fig. 5, terminating short of the ends, so that end-collars 23 are left, between which the valve lies. The valve is therefore moved with the stem, but does not turn on it. In the periphery of the valve is formed a port 24. The inner end of the valve-stem is provided With a piston 25, and the'upper or cap end 9 of the valve-casing has air openings 26.

When the compressed air is turned into the casing 9, through its inlet 15, it will, by acting on the piston 25, force the valve over to the position shown in Fig. 5, in which the connection 16 to the hammer cylinder 5 is cut off, and the connection 17 to the liftingpin 19 is open. The air thus elevates said pin 19, which raises the hammer-die 7 and holds it up. Now, upon pressing down the heel of the treadle 14, the valve stem 10 is drawn down, and the valve moves to a position in which its port 24 joins the lifting-pin connection 17 and the exhaust port 21, thereby permitting the air to exhaust from under the pin and free it; and in this position of the valve the connection 16 to the hammer cylinder is open, so that the comand admitted under the lifting pin, which thereby raises the hammer die and holds it up.

The anvil-die S, is a block formed on its upper surface with flat planes 27 separated by a rectangular central shoulder 28 which rises from the surface and extends from front to back, as seen clearly in Figs. 7 and 8. The hammer-die 7, which is best seen in said Figs. 7 and S, has in its under surface a central groove 29, of rectangular section and extending from front to back. The under surface of the die forms, in the main, fiat planes 30, but these at their forward ends on each side of the central groove 29 are beveled to form the triangular upwardly converging planes 31, which intersect the planes of the groove side-walls, and the planes of the bottom and front of the die.

The upper wall of the central groove 29, is, at its back, a straight plane 32, as seen in Fig. 8. At its front it is beveled to form forwardly diverging inclined planes 33, and these are further beveled at a greater angle to form the forwardly diverging, upwardly converging inclined planes 34.

In the face of the die 7, directly above the planes 34 is a recess 35.

In Fig. 9, the coal-puncher to be sharpened is designated by 36. It has two prongs 37 which are beveled down as seen at 38, to form the cutting edges. The back of these prongs is substantially flat, the sharpening being only from one side.

The operation of sharpening the tool 36 on our machine is as follows :The end of the tool having been heated red hot is first laid on its back on one of the flat-planes 27 of the anvil-die, with one side firmly pressed against the shoulder 28 of said die which serves as an abutment for it to hold it in place against the force of the blows of the hammer-die. In this position one of the prongs 37 lies directly under one of the beveled corner planes 31 of the hammer-die, while the other prong extends to one side of said die. The treadle being now pressed down, the lifting-pin is relieved of the air, and the pneumatic hammer is operated to cause the hammer-die to deliver a succession of quick blows. The groove 29 of the hammer-die plays down over the shoulder 28 of the anvil-die; and the beveled corner plane 31 of the hammer-die strikes the prong of the tool and swages its surface to an edge. The operator by skilful moving of the tool, using theshoulder 28 as a fulcrum is able to so change the position of the prong during this operation, as to effect the swaging of the prong surface uniformly and in the desired directions. The pressure on the treadle is now relieved, and the hammer-stops, while the lifting-pin is elevated and holds up the hammer-die. The tool is then placed on the other side of the anvil-die, with its other prong in position to be operated upon by the other beveled corner plane 31 of the hammer-die; and the operation is repeated. The hammer being then stopped, the tool is turned with its prongs in a vertical plane, and is laid on top of the shoulder 28 of the anvil-die, one of its prongs being now presented edgewise under one of the beveled planes 34 of the hammer-die, while its other prong enters the recess 35 above. The hammer being again started, the plane 34: comes down upon the edge of the prong, throughout its length and well into the crotch of the prongs, with the result of further swaging the surface of the prong and properly drawing it out to a point. In like manner, when the tool is turned, the other prong is treated by the other plane 3%. By thus swaging both horizontally and vertically, the prongs are properly drawn out to shape and sharpened, the whole operation being quickly done.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is 1. In a coal-puncher sharpening-machine, the combination of an anvil-die formed with flat side planes and an intervening raised shoulder, and a hammer-die formed with a groove in its lower surface to play over the raised shoulder of the anvil-die, the lower surface of said hammer die having at its front portion, on each side of the groove, upwardly converging planes which intersect the planes of the bottom and front of the die and the side walls of its groove.

2. In a coal-puncher sharpening machine, the combination of an anvil-die having a central raised shoulder, and a hammer-die having in its lower surface a groove to play over the raised shoulder of the anvil-die, the upper wall of said groove having at its forward end forwardly diverging, upwardly converging planes.

- 3. In a coal-puncher sharpening machine, the combination of an anvil-die having a central raised shoulder, and a hammer-die having in its lower surface a groove to play over the raised shoulder of the anvil-die, the upper wall of said 'roove having at its forward end forwardI T diverging, upwardly converging planes, said hammer-die having a recess in its front above said planes.

1. In a coal-puncher sharpening machine, the combination of an anvil-die formed with fiat side planes and an intervening raised shoulder, and a hammer-die formed with a groove in its lower surface to play over the shoulder of the anvil-die, the lower surface of said hammer-die having at its front on each side of its groove upwardly converging planes which intersect the planes of the bottom and front of the die and the side Walls of the groove, the upper wall of said groove having at its forward end forwardly diverging, upwardly converging planes.

5. In a coal-puncher sharpening machine, the combination of an anvil-die formed with fiat side planes and an intervening raised shoulder, and a hammer-die formed with a groove in its lower surface to play over the shoulder of the anvil-die, the lower surface of said hammer-die having at its front on each side of its groove upwardly converging planes which intersect the planes of the bottom and front of the die and the side walls of the groove, the upper wall of said groove having at its forward end forwardly diverging, upwardly converging planes, said hammer-die having a recess in its front above said last named planes.

6. In a sharpening machine" of the described class, and in combination with an anvil-die, a hammer-die having a rear lug, and a pneumatic hammer for operating said hammer-die, a pneumatically operated lifting-pin acting under the lug of the hammer die to lift and hold said die up when the hammer is not operating, and a valve-control for eifecting the alternate operation of said hammer and said lifting pin.

7 In a sharpening machine of the de scribed class, and in combination with an anvil-die, a hammer-die having a rear lug, and a pneumatic hammer for operating said hammer-die, a pneumatically operated lifting-pin acting under the lug of the hammer die to lift and hold said die up when the hammer is not operating, and a valve-control for effecting the alternate operation of said hammer and said lifting pin, comprising the valve-casing with an inlet for the compressed air, an outlet connection for the air to the pneumatic-hammer, an outlet connection for the air to the lifting-pin and an intervening exhaust port, a slidable stem in said casing having a piston on its end, and a valve on said stem disposed to alternately control the two air outlet connections from the casing, said valve having a port arranged to connect the exhaust port of the casing with the air outlet to the lifting-pin, when the outlet to the pneumatic hammer is open, and to close the communication between the exhaust port and the outlet to the lifting-pin, when the outlet to the hammer is closed.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOHN B. WORD. WILLIAM W. WORD.

Witnesses:

WM. F. BOOTH, D. B. RICHARDS.

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