US678300A - Stamp-machine. - Google Patents

Description

Paten'ted luly 9, 190|.

c. H. yKmxusla. STAMP MACHINE.

(Application led Oct. 22, 1900.)

(No Model.)

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A TTOHNEYS "Nrrnn STATES' CHARLES HENRY KRAUSE, OF SOUTHLAKE LINDEN, MICHIGAN.

sTAwiP-MACHaNE.

- SPEGIFIGATIGN forming part of Letters Pjatent No. 678,300, dated July 9, 1901.

Application led October Z2, 1900. Serial No.. 33,894, (No model.)

T @ZZ whom, il; may concern:

Be it known that I, CHARLES HENRY KRAUSE, a citizen of the United States, and a resident of Southlake Linden, in the county of Houghton and State of Michigan, have invented a new and Improved Stamp-Machine, of which the following is a full, clear, and exact description.

This invention relates to improvements in atmospheric stamp machines or mills for ores orthe like; and the object is to simplify the construction of this class of machine and particularly the machine shown in the patent granted to me under date of November 12, 1889, No. 414,910, and' with other changes in construction I omit the fast and slow motion mechanism in said patent.

I will describe a stamp-machine embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

' in which similar characters of reference indicate corresponding parts in both figures.

Figure 1 is a partial section and partial elevation of a stamp-machine embodying my,in vention. Fig. 2 is a sectional detail showing the air-cylinders and pistons.

The frame of the machine comprises a base 1 and uprights 2, connected by cross-bars 3. Mounted on the foundation is a mortar 4, in which the pestle or shoe 5 operates, said pestle being attached to a stamp-rod 6. Supported in the frame are diierential cylinders 7 and S-that is, the cylinder 7 is of greater area or volume than the cylinder 8. By this construction a large volume of air in the cylinder 7 is forced into` the cylinder 8 of less volume, thereby creating a great pressure on the piston 9, operating in said cylinder 8 and attached tothe rod 6. Operating in the cylinder 7 is a piston 10, the connecting-rod 11 of which is attached to a crank ona crankshaft 12, that may be rotated by any desired means.

Arranged within the valve-casing 13,which communicates with .the upper cylinder 7, are

valves 14 and 15, the valve 14 being operated by movements of the machine,while the valve 15 is automatically opened by air-pressure. A valve-Casin g 16 communicates with the cylinder 8, and arranged in this casing is a automatic.

spring-pressed upwardly-opening valve 17. The valve 14 has a rod connection 1,8 with a lever 19, pivotally connected to one of the uprights 2, and as a means for adjusting the 'throw of said valve 14 the rod'18 is made in two sections, connected by a turn-buckle or the like 20. The lever 19 is designed to be raised at its free end to open the valve 14 by means of a tappet 21 on the rod 6. This tappet is made in the form of a pulley to receive a band for imparting a slow rotary movement .to said rod.

In operation the piston 10, moving upward, produces between the two pistons a partial vacuumthat causes the lower piston to rise, consequently raising the pestle 5 until the tappet 21 comes in contact with the lever 19. Then by continued movement the valve 14 is opened, allowing atmospheric air to pass in, raising the valve 15, and rushing in between the two pistons. The valve 15 will close just as soon as pressure is restored in the cylinder; but the valve 14 will notclose until the stamp-shaft is moved down to the place at which it opened. Therefore this valve is As the upper piston 10 moves downward a great pressure is produced, driving the lower piston down with great force and producing a heavy blow of the stamping device. An air-cushion between the pistons, however, will permit the pestle or stamping device to accommodate itself to theamount of material in the mortar. After the lower piston passes the port leading into the valvecasing 16 the air-pressure is automatically eX- hausted through said valve-casing, the pressure, of course, opening the valve 17, and this valve is closed by the outer atmospheric pressure after the inner air shall have been eX- hausted.

I have shown a projection or boss 22 on the lower side of the upper piston 10, the object of which is to produce a greater displacement when a more forcible blow of the stamp is desired, and this boss may be made of any size to suit required conditions. I do not confine myself, however, to this construction, as the lower side of said piston may be in one plane surface. The length of the stroke of the upper pist-on may be the same as the lower piston or may be less; also, the ratio of the cylinders may be any quantity.

IOO

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In a stamp machine or mill, two dil'erential cylinders arranged one above the other, a piston operating in the smaller cylinder, a stamping device carried by said piston, a valve for controlling the exhaust from the smallcrcylinder, apiston in the larger cylinder and unconnected with the smaller piston, means for operating the piston in the larger cylinder, a valve-casing communicating with both the cylinders, an inlet-controlling valve in said casing, a lever with which said Valve connects, a tappet carried by the stem of the smaller piston for engaging with said lever to open the valve, and an air-pressure-actuatcd Valve also in said casing, substantially as specified.

2. A stamp machine or mill, comprising dif- CHARLES HENRY KRAUSE.

Witnesses:

HENRY C. KRAUSE, EDWIN SMETHERAM.

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