US1071270A - Mining implement. - Google Patents

Description

W. 0. SNELLING.

MINING IMPLEMBNT.

APPLIUATION FILED Nov. 2a, 190B.

Patented Aug. 26, 1913.

2 SHEETS-SHEET 1.

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COLUDUJA FLANOGRAPH CO.,WASHNGTON D. C.

W. 0. SNELLING.

MINING IMPLEMENT.

APPLICATION FILED Nov. 2s, 190e.

1,071,270. Patented Aug. 26, 1913.

2 SHBETB-SHEET 2.

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i mi tri. t.) a tali-EMU WALTER O. SNELLING, OF PITTSBURGH, PENNSYLVANIA.

MINING IMPLEMENT.

Specification of Letters Patent.

Patented Auen 26,1913.

Application led November 23, 1908. Serial No. 464,156.

To all whom may concern.'

Be it known that I, VVAL'rnR O. SNnnLiNG, a citizen of the United States7 residing at Pittsburgh, in the county of Allegheny and State or' Pennsylvania; have invented certain new and useful Improvements in Mining Implements, of which the following is a specification.

rlhis invention relates to mining or tunneling machines or implements, the object of the invention being the provision of a tool or implement adapted to fracture a body oi coal, salt or other massive material and to loosen or detach portions thereof.

ln the preferred embodiment of the invention the implement carries an expansible and movable member which may be inserted into an opening or drill hole in a body of coal or the like, and expanded therein to produce fractures extending into or through the mass, after which the expanded member may be moved or withdrawn longitudinally in such manner as to detach the loosened portions of t-he mass.

Certain embodiments of the invention are illustrated in the accompanying drawings; wherein Figure l is a vertical section showing the implement in place and illustrating its mode of operation; Fig. 2 is a side View of a handoperatcd implement; Fig. 3 is a side view ot a portion of a similar implement having a drill attachment; Fig. et is a partial side view et the implement shown in Fig. 2, illustrating the toggle mechanism in its eX- panded and locked position; Figs. 5, (3 are a side elevation and plan respectively of a modified construction; and Fig. 7 is a side elevation illustrating one mode of mounting and operating a plurality of power driven implements.

tet'erring particularly to Figs. l, 2 and et, l represents the stock of the tool, provided with screw threads as shown. At one end of the stock is secured a ratchet wheel 2; actuated by'a reversible pawl 3, which may be of any usual construction and is carried by a handle 1l. At the other end of the stock l is an abutment 5, the screw threads being omitted from the adjacent threaded portion of the stock.

able thereon by rotation oit the stock, while the internal diameter of the collar 7 is su [icient to permit it to slide freely upon the It results from this construction that by rotation of the stock l under conditions preventing the simultaneous rotation of the collars, as when the toggle levers are firmly held by being pressed against the sides of the drill hole, the collars may be caused to approach or to -recede from each other with corresponding expansion or retraction oit the toggle levers. After insertion of the apparatus into the drill hole a quick movement ot the rod will, through the inertia of the toggle mechanism; cause the elbows of the toggle to engage the irregular sides ofthe hole; and by such engagement will hold the toggle against rotation; the further turning of the screw will cause the screw-threaded sleeve to move toward the end of the stock l, thereby torcing the elbows outwardly. The term expanded"7 is employed as referring to the levers in the position which they assume when the collars are caused to approach each other or are locked together, the term retracted expressing the position of the lcvers when the collars are moved apart.

It is preferred to provide suitable mechanism for locking the collars together in the fully expanded position of the toggle levers, one form of device ior this purpose being as show-n in Figs. 2, 3 and di and comprising a latch l2 pivotally mounted on one et' the collars at 13, this latch having a stop la and adapted to engage a pin or boss lo on the other collar. The collars are shown in their locked position, and the levers in their fully expanded position, in Fig. Ll.

The operation of the device as above dcscribed is as follows: The coal or other material is preferably undercut in the usual manner as indicated at 1G in Fig. l, and any desired number of holes of sutlicient size to receive the implement are drilled inl proper relation to the undercut. These holes may conveniently be drilled by .the implement itself which may be provided for this purpose with a. separable drilling attachment carried by the abutment 5 as shown at 17 in Fig. 3. The implement is then inserted into the hole as indicated in Fig. 1, and by rotation of the stock the collar 8 is caused to approach the collar 7 and to loclr therewith, thereby expanding the toggle levers and exerting a powerful pressure upon the mass and fracturing the same as indicated in Fig. 1. The direction of rotation of the stock is then reversed, whereby the expanded toggle levers are moved longitudinally of the stock, exerting an outward pressure upon the mass of material and detaching or dislodging portions thereof. rIhe portions so dislodged may of course be permitted to fall directly to a chute or mine wagon, or may be handled in any usual or preferred manner as will be readily understood by those skilled in the art. The collars may now be separated thereby returning the levers to their initial position, and the operation repeated.

In Figs. 5, 6 I have illustrated a modified form of the apparatus in which the rotatable stock is replaced by parallel rack-bars 18, 19, each of the toggle levers 9, 10 being mounted upon these bars as shown in such manner that they may be expanded or retracted as desired. 20 represents a pinion mounted on a shaft 21 and adapted to engage either of the rack-bars 18, 19, at will, or to simultaneously engage both of said rack-bars, this being conveniently effected by providing means,not shown, for reciprocating the shaft 21 in the direction of its length. In the operation of this form of device the toggle levers are retracted and the implement inserted into the drill hole; then by the forward movement of the rackbar 19, the bar 18 being meanwhile firmly held the levers are expanded, fracturing or loosening the mass. The pinion 2O is then moved into engagement with both rack-bars, thereby locking them, and by reversing the direction of rotation of the shaft 21 the loosened material is dislodged as above described.

It will be obvious that the device may be otherwise modified without departure from the spirit of my invention: for instance, a plurality of expanded members, adapted either for simultaneous or successive operation, may be mounted on a single bar or rod, either rotary or reciprocating.

The implement may be operated by hand or by power applied in any suitable manner, and the desired number of implements may be mounted to act jointly and simultaneously, or progressively and successively. Thus in Fig. 7 1 have shown a plurality of implements of the type shown in Fig. 3 mounted upon a wheeled truck or car 22 and adapted to be actuated through suitable gearing or power-transmitting means from any desired source of power, as for example an electric motor 23 carried by the truck. This arrangement is hiO'hly edective in practice, as the several expanding members may be caused to exert pressure simultaneously upon different portions of a mass to be fractured or dislodged, whereby large masses may be loosened or detached. lt is also practicable by merely giving to the several expanding members, whether mounted upon single rod or upon separate rods, a different initial set, to bring to bear upon the mass of material to be fractured a progressive pressure along predetermined lines, whereby fractures of great extent may be readily produced. Obviously the same result may be secured by suitably varying the size or power of the several expanding members.

I claim:

1. A mining implement, comprising a movable rod or bar, an expansible member operated thereby, said member adapted for insertion into a drill hole or bore, means connecting said rod or bar and expansible member, means for expanding said expansible member by a movement of the rod or bar in one direction and to withdraw said expanded member when locked by a movement of said rod or bar in the opposite direction, and means for locking said expansible member in an expanded position.

2. A mining implement, comprising a movable rod or bar, an expansible member mounted thereon and operated thereby, said rod or bar and member adapted for insertion into a drill hole or bore, means eonnecting said rod or bar and expansible member, means for expanding said expansible member by a movement of the rod or bar in one direction and to withdraw said expanded member when locked by a movement of said rod or bar in the opposite direction, and means for locking said expansible member in an expanded position.

3. A coal mining tool, comprising a screwthreaded rod or bar, rings mounted thereon one of which is screw-threaded to engage the screw-threads of the rod or bar, toggle-levers connecting the rings, means for expanding the toggle-levers and means on said rings for locking the toggles in expanded position.

4. A mining implement, comprising a screw-threaded rod or bar, rings mounted thereon one of which is screw-threaded to engage the screwthreads of the rod or bar, toggle-levers connecting the rings, means for moving the toggle-levers into their expanded position, and automatic means for locking said levers in said expanded position.

5. A mining implement, comprising a screw-threaded rod or bar, rings mounted thereon one of which is screw-threaded to engage the screw-threads of the rod or bar, toggle-levers connecting the rings, inea-ns for effecting a relative movement of the said rings and thereby moving the toggle-levers into their expanded position, and Ineens oarried by the said rings for looking the togglelevers in said expanded position. 10 In testimony whereof, I ailix my signature in presence of two Witnesses.

VALTER O. SNELLING. Witnesses WILLIAM TAYLOR,

I. W. ENGLAND.

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

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