US1766395A - Mining machine - Google Patents

Description

June 24, 1930. F. B. MILLER 1,766,395

MINING MACHINE I Filed Sept., 13. w29 2 Sheets-Sheec' 'l June 24, 1930. l nB. MILLER 1,766,395

MINING MACHINE I l Filed Sept. 13, 1929 2 Seets-Sheec 2 MAA n nnn V Patented June 24, 1930 FREDERICK B. MILLER, or soor'mnnrn, PENNSYLVANIA MINING MACHINE Application filed September 13, 1929. Serial No. 392,449.

This invention relates to advancing and retracting mechanism for mining machines, and, while not limited thereto, relates more particularly to mechanism for advancing and '5, retracting mining machines like that shown and described in my prior United States Patent No. 1,643,000, dated September 20, 1927.

One object of this invention is to provide an advancing mechanism capable of resisting the force exerted by the mining machine against the face of the coal. Another object is to provide advancing mechanism which may be operated and repositioned without interfering with the operation of the machine.

Other and various objects and advantages will be apparent from the following speciiication and drawings.

1n the drawings- Figure 1 is a side elevation showing the mining machine in advanced position.

Figure 2 is a similar view showing the skid base advanced by the machine.

Figure 3 is a similar view showing the anchor-bar advanced and the apparatus in readiness for further advance of the machine.

Figure l is a plan of the apparatus positioned as shown in Figure 1. 4

Figure 5 is a sectional view taken on the line V-V oi Figure l.

Figure 6 is a sectional view taken line VI-VI oi' Figure 1.

Figure 7 is a sectional view taken on the line VII-VH of Figure 1.

Referring more particularly to the drawings, the latter A designates the mining machine as a whole which is slidably mounted on a skid base 10. The machine A is provided with a pinion 12 which is meshed with a rack 11 on the base 10. The pinion 12 is adapted to be driven in reverse directions by the power drive of the machine (not shown).

lllhe base is provided at its rear end with a pair of spaced lugs 13. An anchor-bar 14 is provided with a head 16 which is mounted between the lugs 13 and pivotally connected thereto by a pin 17. A second tubularanchorbar is telescoped over the bar 14. The

on thc bars 14 and 15 are provided with holes 32- 33, respectively, adapted to be registered to receive a removable locking pin 18- which serves to lock the bars against telescoping movement. v

TheV anchor-bar 15 is provided with holes 19 to receive a pin 29 for locking or securing the bar to a jack (to be described). l

At the rear of the mining machine A a jack B is mounted. The jack B comprises a base-plate 20, a base 21, a screw 22, column 23, bearing-plate 24, and a cap-piece 25. The base-plate 20 is' recessed to form a seat in which the base 21 is seated. The base 21is U-shaped so as to bridge the anchor-bar 15. Each leg of the U-shaped baseis provided` with holes 34 which are adapted to be alined with the holes 19in the bar 15 to receive the pin 291er locking the bar 15 to the jack. The topV face of the base 21 is recessed to form a concave socket 27 in which the ballshaped lower end 28 of the screw 22 is seated. The column 23 is threaded for the reception of the screw 22. When the screwis rotated to expand the jack the cap-piece will be forced against the mine root and the baseplate will beiforced against the mine floor, thus securing the jack in position.

The Yanchor bar 14 is provided with a lug 31 at its forward end and when it is desired to advance the base 10 in the manner to be described, a strut 30 is placed between the lug 31 and the machine A.

In positioning the mining machine the anchor-bars and jack will be positioned and assembled with the machine A at its rearmost position on theskidbase 10. The machineA is then advanced by the power pinion 12 travelling on the rack 11.

When the forward limit of travel of the machine -A on the base 10 is reached] it will be4 necessary toadvance the `base 10, as shown lin Figure i 2, vin order to permit4 `further advance of the machine. l/Vhen the machine has reached its forward limitof travel on the base 10 this` strut 30v will be mounted between the lug 31v`on the bar 14 and the machine, and the pin 18 will be removed. p The pinion 12 will then be ,operated in the reverse direction to pull the base 10 and inner bar 15 forwardly to the position shown in Figure 2. After the base l0 and bar l5 are advanced the strut 3() will be removed and the bar le released from the jack B and advanced until the holes are again in alinement. A second jack will be previously placed in advance of the first jack and the bar 14 will be locked to the base of the second jack by the pin 29 and the bars 14 and 15 will be locked against relative movement by the insertion of the pin 18 through the holes 32-33.

The machine as will be readily seen, is again free to move forward and backward on the base l0 within the limits of the rack 11. v

`While I have shown and described a specific embodiment of my invention, it will be understood that I do not wish to be limited thereto since various modifications may be made without departing from the scope of my invention, as defined in the appended claims.

I claim:

l. The combina-tion with a mining machine of a skid base, a traction pinion on said machine, a rack on said base with which said pinion is meshed, `a telcscoping anchor-bar connected to said base, a jack, means removably connecting said bar to said jack, and means for removably locking said bar against telescoping movement.

2. The combination with a mining machine o-f a skid base, a reversible traction pinion on said machine, a rack on said base with which said pinion is meshed, an anchorbar pi-votally connected tojsaid base', a jack, a second anchor-bar telescopicall-y connected tosaidf first named bar and removably secured to said jack, and means for d'etachably locking said bars against telescoping movement.

3. The combination with a' mining machine of a skid base, a reversible traction pinion on said machine, a rack on said base with which said pinion is meshed, an anchor-bar pivotally connected to said base, a second anchorab'ar telescopically mounted over said first named bar, a jack, means for detachably connecting said second named bar to saidj ack, and means for detachably locking said bars against telescoping movement, a lug on saidV second named bar, and a rigid strut adaptedI to be removably mounted between said lug and said machine to permt said machine to advance said base and said first named barby the opera-tion of said pinion on said rack when said bars are released for relative movement.

4'. The combination with a mining ma'- chine ofa skid base, a reversible traction pinion on said'y machine, a` rack on saidv base with which said pinion is meshedan anchorbar pivotalfly connected to said base, a second anchor-bar connected to and movable longitudinally relative to saidv first named bar, a jack, means for detachably connecting said secondnamedibar'to said'jack, andf'means for my hand. A

FREDERICK B. MILLER.

leoY

uit

Images