US356464A

US356464A - Joseph c

Info

Publication number: US356464A
Authority: US
Publication date: 1887-01-25
Anticipated expiration: 1904-01-25

Description

(No Model.) Y

J. C. GITHENS.

ROCK DRILL.

No. 356,464. Patented Jan. 25, 1887.

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SPECIPICATION forming part of Letters Patent No. 356,464, dated January 25, 1887.

Application filed September 17, 1886. Serial No. 213,775. (No model.)

To all whom it may concern:

Be it known that I, J OSEPH O. GITHENS, of North Tarrytown, New York, have invented certain Improvements in Rock-Drills, of which piston-rod can be easily obtained for the purpose of renewing them when worn without removing the piston from the cylinder or otherwise deranging the parts of the drill, it being only necessary to loosen the bolts holding the cylinderhead and to draw it away from the cylinder.

My improvement consists in making what is usually called the front cylinder-head in the form of a sleeve which is longitudinally slit on one side, and which has an internal diameter sufiiciently great to permit the piston to pass freely through it, and which is provided with clamping devices by means of which it is securely clamped upon a removable parting bushing, through which the piston-rod passes.

The accompanying drawings, illustrating my improvement, are as follows:

Figural is an elevation of a rock-drill cylinder provided with my improved cylinder head. Fig. 2 is a sectional view of the front cylinderhead and a portion of the cylinder, showing the piston and piston rod in elevation. Figs. 3 and 4 are end and side elevations, respectively, illustrating the construction'of the parting bushing. Figs. 5 and 6 are end and side elevations, respectively, of the slit sleeve; and Figs, 7 and 8are end and side elevations, respectively, of the divided pack-- ing-gland.

As shown in the drawings, the front cylinder-head is composed of a cylindrical sleeve,

A, which is slit open longitudinally at one side, and is provided with four perforated lugs, A A, two on either side of the slit a, through which lugs are inserted the screw-bolts BB, which draw the edges of the slit sleeve A together and bind it firmly upon the parting bushing O, which is inserted within the sleeve A.

The sleeve A is longer than that part of the bushing O which it incloses, and the portion which extends beyond the end of the bushing is provided with an internal screw-thread for engaging the screw-threads formed upon the exterior of the split packing-gland D, between which and the end of the bushing O isinserted packing material E. WVhen the bolts B B are tightened, the split gland D is clamped within the sleeve A, and is prevented from being loosened by the vibration of the machine in use.

One end of the bushing O is turned to fit the interior of the steaincylinder F, and the other end to fit the interior of the sleeve A, and is provided with a flange, 0, near its cylinder end. Oneside ofthe flange bears against the end of the cylinder F, while the other bears upon the end of the sleeve A, and the flange is thus clamped between the ends of the cylinder F and the sleeve A, when the bolts G G, which pass through perforated lugs g g on the sleeve A, are tightened. ,The bolts G G pass through similar lugs formed on the rear cylinder-head, which is of the usual construction, and serve to secure both the front and rear heads to the cylinder.

In erecting the machine the piston H is passed through the sleeve A and inserted in the cylinder F. The halves ofthe parting bushing 0 are then placed together, encircling the piston-rod H, and the sleeve A slipped over their ends. The other end of the bushing G is then inserted in the end of the cylinder F, and the bolts G G put in place and screwed up. Then the packing material E is inserted in the annular space between the end of the sleeve A and pistonrod H, and the split gland D placed upon the piston-rod and screwed in upon the packing E. The bolts 13 B are then tightened and the cylinder-head is in place.

To renew the bushing C it is only necessary to loosen the bolts G G and B B and draw the sleeve A away from the cylinder F, when the halves of the bushing 0 may be easily drawn out and. replaced by new ones.

The sleeve A'is'preferably made of malleable'iron, and the parting bushing O and packing-gland D of cast-iron or other suitable manally-slit sleeve A, the parting bushing C, the terial. The outer end of the gland D is prodivided packing-gland l), and the bolts B B, IO vided with lugs (Z d to engage the notches of a for clamping the sleeve upon the said bushing spanner-wrench. and gland. i 5 I claim as my invention- JOSEPH C. GITHENS. In a rock-drill, the combination, suhstan- Witnesses:

tially as herein set forth, With a steameylin- V. S. BARNUM,

(1e1 piston, and piston-rod, of the iongitudi- H. V. CONRAD.