US1183441A - Mechanism for operating coal-augers. - Google Patents

Description

T. w. DAVIS. MECHANISM FOR OPERATING COAL AUGERS. APPLICATION FILED NOV-23, I915. L1,%%L Patented May16,1916.

3 SHEETS-SHEET L T. W. DAVIS.

MECHANISM FOR OPERATING COAL AUGEHS. APPLICATION FILED HOV-23, l9l5.

LWSAM. Patented Mag 16,1916.

3 SHEETSSHE ET 2- attomw THE COLUMBIA I'LANOGRAPH co., WASHINGTON, n. c.

T. W. DAVIS. MECHANISM FOR OPERATING COAL AUGERS.

APPLICATION FILED NOV-23. IBIS.

. M 6 I Mn I M w. m I a w 3 L M w I w THOMAS W. DAVIS, OF HONAKER, VIRGINIA.

MECHANISM FOR. OPERATING COAL-AUG-ERS.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed November 23, 1915. Serial No. 63,031.

To all whom it may concern:

Be it known that I, THOMAS W. DAVIS, a citizen of the United States, residing at Honaker, in the county of Russell and State of Virginia, have invented new and useful Improvements in Mechanism for Operating Coal-Angers, of which the following is a specification.

This invention relates to mining machinery and more particularly to mechanism for operating coal augersand the like and the principal object of the invention is to provide simple and efficient mechanism for driving the auger and effectively feeding it in either direction.

Another object of the invention is the provision of an auger driving mechanism which is so constructed that the auger may be driven into the work at a proper rate of speed and withdrawn from the work rapidly so as to avoid loss of time and to prevent chips and dirt from remaining in the drill hole.

Still another object of the invention resides in the provision of a device of the character described so adapted to the stoping bar that it may be adjusted and operated to drive the auger at any angle.

Further objects of this invention will appear as the following specific description is read in connection with the accompanying drawings which form a part of this application, and in which Figure 1 is a front elevation showing the stoping bar in vertical position and the parts arranged for horizontal drilling. Fig. is a rear elevation. Fig. 3 is a side elevation.

' Fig. 1 is a top plan view with the stoping bar in section. Fig. 5 is a vertical sectional view taken on the line 5-5 of Fig. 1. Fig.

6 is a horizontal section taken on the line 66 of Fig. 2. Fig. 7 is a detail vertical section on the line 7--7 of Fig. 1.

Referring more particularly to the drawings, 1 represents a stoping bar, the sepa- 0 while the other end is arranged to receive -as will be hereinafter described.

the adjusting screw 5 actuated by the wheel 6 so as to enter a wall or the floor as will be readily understood. The leg 2 of the bar is preferably provided with suitable notches 7, the purpose of which will be hereinafter described.

Slidably mounted between the legs 2 and 3, is a mounting head 8 having secured thereto, by means of the bolt 9, the guide yoke 10 which surrounds the legs, as shown. The bolt 9 also serves the purpose of connecting the head 8 to the carrier 11 and fur ther holds a guide block in proper position, The head 8 is maintained in adjusted position upon the stoping bar by means of a spring actuated locking dog 12 slidably mounted in a bracket 13 formed on the head 8, as shown. The dog 12 is adapted to engage the notches 7 in the leg 2 and is withdrawn from said notches by the actuation of the lever 14: which is connected to the dog by a link 15 and is supported upon a pivotally mounted bar 16 carried by the head. The bar is connected to the head in this manner so as to permit of its being drawn downwardly when it is necessary to position the stoping bar close to the ceiling or a side wall and is held in alinement with the bracket and at right angles to the stoping bar by removable pins 17 Also formed upon the head 8 is a second bracket 18 having slidably mounted therein a spring pressed locking dog 19 controlled by a lever 20 connected thereto through the link 21. This dog is adapted to engage suitable recesses or notches formed in the upper and inner arcuate side 22 of the carrier 11, so as to hold the carrier at any suitable angle relative to the stoping bar.

The carrier 11 comprises the side plates 22 and 23, connected together at their upper and lower ends by the bridge pieces 24 and 25, respectively, and each side plate is formed with suitable guide ways 26 in which is slidably mounted the drillshaft carrying frame generally indicated at 27. This frame comprises the side bars 28 and 29 connected together at opposite ends by the heads 30 and 31, and arranged upon opposite sides of 100 the guide block 32 which, as before stated, is held in proper position by the bolt 9.

Journaled in bearings carried by the heads 30 and 31 is a drill operating shaft 33 which may be turned by the crank 34 or in any other suitable manner and which carries upon its outer end any suitable type of drill or auger chuck 35. The shaft 33 has keyed thereto a pinion 36 which meshes with a similar pinion 37 secured to the end of the screw shaft 38 also journaled in bearings carried by the heads 30 and 31. The pinion 37 is in mesh with a relatively large gear 39 keyed to the end of a screw shaft 40 and both of these screw shafts are arranged in parallel relation and upon sides of the guide block 32 against which they have smooth bearing.

Mounted upon opposite sides of the guide block and connected together by pins 41 extending through said block are the half nuts 42 and 43, the latter of which is adapted to engage the shaft 38 and mesh with the threads thereon and the former of which is adapted to engage the shaft 40 and mesh with the threads thereon. The nuts are so arranged that when one is in engagement with its respective shaft, the other is out of engagement with its shaft. These blocks are operated by a bell crank lever 44 connected to the upper block 42 by means of hinged links 45. The lever operates over a segment 46 and is provided with the usual actuating spring dog 47 engaging notches in the segment to hold it in adjusted position. It will be noticed that the shaft 38 will travel at the same speed as the crank shaft 33 and the shaft 40 is turned at a considerably lower speed and thus it will be seen that a positive but slow feed of the auger is obtained when the nut 42 is in engagement with the shaft 40, while a positive and rapid retraction of the drill may be obtained when the nut 43 is in engagement with the shaft 38.

In the operation of the device, the stoping bar is secured between side walls or between ceiling and floor in the usual manner and the carrier adjusted so as to incline the auger fast whereby the auger 48 may be fed toward the work at the proper angle. The parts are held in adjusted position by the dog 19. The nuts 42 and 43 are then shifted so as to bring the nut 42' into mesh with the shaft 40 and to carry the nut 43 out of mesh with the shaft 38. By rotating the crank, the auger 48 is properly rotated to cut into the coal or other substance and is also fed forward into the coal at a proper rate of speed. When the hole has been drilled to its proper depth, the lever 44 is shifted so as to .release the nut 42 from the shaft 40 and to bring the nut 43 into engagement with the shaft 38. Rotation of the crank in the same direction as in drilling will cause the rapid rotation of the shaft 38, thereby producing an equal withdrawal of the drill. This not only saves time, but it has been found in practice that the rapid rotation of the drill and its rapid withdrawal, will cause all chips or'particles of coal dust to be removed from the coal so that the danger from coal dust fires is greatly reduced.

It is to be understood that I preferably have all bearings on the main and reserve shafts supplied with antifriction bars and arranged the parts so that they may be conveniently driven by a motor. I also wish it understood that this device may be used equally well for drilling rock by using diamond pointed bit and that the speed of the machine may bereadily varied by changing the size of the gear wheels.

What is claimed is 1. In a device of the class described, including a rotatably mounted-carrier, a frame slidably mounted in the carrier, a non-displaceable drill shaft journaled in the carrier, means for rotating the drill shaft, feed screws journaled in the frame and actuated at diiferent speeds in opposite directions by the rotation of the drill shaft in one direction, nuts connected to the carrier, and means for independently engaging the nuts with the feed screws.

2. In a device of the class described, including a rotatably mounted carrier, a frame slidably mounted in the carrier, a non-displaceable drill shaft journaled in the carrier, means for rotating the drill shaft, feed screws journaled in the frame and actuated at different speeds in opposite directions by the rotation of the drill shaft in one direction, nuts connected to the carrier, means for independently engaging the nuts with the feed screws, and bearings for the feed screws opposed to the nuts.

3. In a device of the class described, including a rotatable mounted carrier, a frame slidably mounted in the carrier on opposite sides of the bearing member, a non-displaceable drill shaft journaled in the frame, feed screws journaled in the frame, an intergeared connection between the shaft and screws whereby said screws are rotated at different speeds and in opposite directions, connected nuts arranged upon opposite sides of the bearing member and adapted for engagement with the screws, and means for throwing either nut into engagement with its respective screw and disconnecting the other nut from its respective screw.

4. In a device of the class described, including a rotatably mounted carrier, a frame slidably mounted in the carrier, a drill shaft rotatably mounted in the frame, a bearing movable with the carrier and arranged between the sides of the frame, feed screws

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