US1344201A - Mining-machine - Google Patents

Description

C. E. DAVIS.

MINING MACHINE.

APPLICATION FILED APR. I5, 1912. RENEWED NOV. 12,1919.

1 ,344, 20 1 Patented June 22, 1920.

2 SHEETSSHEET I.

A6 60 7* 72gb 2 C. E. DAVIS.

MINING MACHINE.

APPLICATION FILED APR. 15, 1912. RENEWED NOV. 12,1919.

Patented June 22, 1920.

2 SHEETS-SHEET 2.

javemaar (Zar/ep .27 73 1 UNITED STATES.

PATENT OFFICE.

CHARLES E. DAVIS, OF CHICAGO, IIJLINOIS, ASSIGNOR 'IO GOODMAN MANUFACTURIN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MINING-MACHINE.

Specification of Letters Patent. Patented June 22, 1920. Original application filed October 6, 1910, Serial No. 585,549

. Divided and this application filed April 15,

1912, Seria1 No. 690,697; Renewed November 12, 1919.- Serial No. 337,825.

To all whom it may concern:

Be it known that I, CHARLES E. DAVIS, a

citizen of the United States, residing at Chiuseful Improvement in Mining-Machines, of

"H. of Fig. 1.

which the following is a specification.

This invention relates to improvements in mining machines and has for its object to provide a new andimprovedmachine of this description. The invention is illustrated in the accompanying drawings, wherein1 Figure l is a plan View of a mining machine embodying the invention.

Fig. 2 is a side elevation of the machin shown in Fig. 1.

Fig. 3 is a sectional view taken on line Fig. 4 is a sectional view taken on line 14 of Fig. 3.

Like numerals refer to like out the several figures.

This application is a division of my rior application, Serial No. 585,549, filed ctober 6, 1910. The mining machine herein shown is of a type having a forwardly projecting cutter arm 1 provided with an endless cutter chain 2 which passes around a parts throughsprocket wheel 3 at the front end of the cut-' motor 5. The cutter arm is fixed with relation to the frame carrying the motor and the entire machine is moved during the cutting safety device shown in the drawing 1s proprocess. The entire machine is first moved longitudinally so as to make the first cut or entry into the coal and is then moved laterally along the face of the coal. In the device shown, the machine is fed by means of a flexible power transmitting device 6 which passes over a drum 7 operated by the motor and which is connected to a stationary part. \Vhcn it is desired to make the first'cut or entry into the coal, the machine is in the position shown in Fig. 1, and the power transmitting device 6 is connectedJto a stationary part 8 arranged in such position as cutters of the chain engaging the coal also tend to produce a lateral movement of the cutter arm. In order to prevent this lateral movementfl provide the cutter arm with two guides 9 and 10. Between these guides is provided a guiding device having a guiding part 11 and a shoe 12. The guiding part-11 is provided with means for fixing it in position, such as for example, the jack 13, which is adapted to be brought into engagement with the face of the coal or other stationary part. It will thus be, seen that when the 'ack is tightened, the guidingpart 11 is held rigidly in position, the shoe 12 engaging the ground or floor. The machine can then be moved forward but will be held against lateral movement. When a machine 0 this type as ordinarily constructed is first started in its forward cut, practically the entire cutter chain is exposed so as to en- ;danger anyone near the machine. It has also been found that as the machine is started into the coal, it often strikes a hard spot and is thrown entirely away from the face the operator or any other person near the machine. Since the cutter arm is rigid with the frame of themachine and is pushed forward into the coal, it will be seen that any guard used must be one which will gradually move out of the way as the cutter arm enters the coal. The particular form of guard or back into the frame as the. cutter chain is moved forward, the guard finally taking the position as shown in Fig. 3. As herein shown, the cross bar 16 is provided with a suitable opening'for the guiding part 11 attached to the shoe 12. Some-means is preferably rovided for holding the guard frame in its all extended positionwhile the machine is being moved about. As herein a shown, the 'guidin part 11 which has a part passing through t e hole of the cross bar 16 is provided with a pivoted latch 18 adapted to engage the cutter arm so as to lock the guiding frame and cutter arm together when desired; The latch 18 is provided with an upwardly turned end 19, and the jack has a beveled face 20 which engages the upturned end 19 so as to move the latch 18 to automatically disengage the parts, when'the jack 13 is placed in position. In operating the device, the jack 13 is placed in position and its end brought into contact with the roof or side wall or some other fixed point and the jack tightenedso as to hold the cutter frame against lateral movement. The machine is again started and the entire machine is moved forward, the cutter chain engaging the coal and gradually cutting it away so that the cutter chain and cross bar project into the coal. The guard being fastened to the fixed shoe is held against forward movement and gradually slides along the guides 17 back into the frame of the machine to the position shown in Fig. 3. WVhen the full forward movement is completed, the jack 13 is removed and the shoe 12 placed upon the support or base 21 of the machine as shown in Fig. 3. It will be seen that by means of this device, the cutter chain is properly guarded while the cutters are exposed, so as to prevent injury to anyone near the machine. The downwardly projecting parts of the side pieces prevent the cutters from striking the operator or any other person even if he should lean against said side pieces. It will be noted that in the present case, there is a moving member with a cut-- ting device mounted on said moving member and a power device mounted thereon, and that the guard for the cutting device is. also mounted on said moving member, there being means for removing said guard from the cutting device progressively as the cutting device enters the substance beingcut.

I claim:

1. A mining machine comprising a cutter arm, a cutter chain associated therewith, a chain guard associated with said chain, a support for said chain guard and a slidin connection between said chain guard an said support said mining machine being supported upon the mine floor independently of the chain guard.

2. A mining machine comprising a frame, a cutter chain, a chain guard therefor slidably engaging said frame, said frame provided with a receiving space for said guard, said guard adapted to slide back into said receivmg space as the chain moves forward,

the mining machine being supported on the mine floor. independently of the chain guard.

. 3. A mining machine-comprising a frame, a cutter arm connected-therew1th, a cutter chain associated with said cutter arm, a chain guard comprising two side pieces,

- independently of the chain guard.

at. A mining machine comprising a frame, a cutter arm rigidly connected therewith a cutting chain on said cutter arm, a guard for said chain movably connected at one end with said frame, the other end adapted to engage a fixed part so that when the machine is moved forward, the cutters of the cutter chain will be gradually moved out of the protection of the guard, said mining machine being supported upon the mine floor independently of the chain guard.

5. A mining machine comprising a frame, a cutter arm connected therewith, a cutting 35 chain associated with said cutter arm, an operating mechanism therefor, a guard for said cutter chain movably connected with the cutter arm and means separate from said operating member for connecting said guard with the cutter arm under predetermined conditions so as to hold them against a relative movement, said mining machine being supported upon the mine floor independently of the chain guard.

6. A mining machine comprising a frame, a cutter arm fixed thereto and projectin outwardly therefrom, a cutter chain carrie by said arm, a sliding'chain guard for said 0 ain, said chain guard adapted to be moved ,100 with relation to said frame under prede terminedconditions, said minin machine bein supported upon the mine oor indepen ently of the chain guard.

7. A mining machine comprising a moving member, a cutting device mounted thereon, a power device also mounted on said moving member, a guard for said cutting device, said guard movably mounted, said guard adapted to uncover said cutting device progressively as the cutting device enters the substance bein cut, said mining ma chine being supporte upon the mine floor independently of the chain guard.

8. A mining machine comprising a frame, 116 a cutter arm connected therewith, a cutter chain mounted on said cutter arm, a chain guard for said cutter chain comprising side pieces slidably connected with said frame, a cross connection between said side pieces, 120 guides on said frame for said side pieces, said frame provided with receiving spaces into which said side pieces are received as the cutting chain enters the material being out, said mining machine being supported upon the mine floor independently of the chain guard.

9. A mining machine comprising a frame,

a cutter arm connected therewith, a cutting chain associated with said cutter arm, a,

- ed on said frame, and means for preventchain ard.

ing relative movement'between said guard and said frame under predetermined conditions, said minin machine being supported upon the mine oor independently of the 10. mining machine comprising a frame, acutter arm connected therewith, a cutting chain associated with said cutter arm, a guard for said cutter chain, located above said cutter armand movably mounted on said frame, said having a relatively sliding movement along the top of said cutter arm and the frame to which the cutter arm is connected, said mining machine being supported upon the mine floor independently of the chain guard.

11. A mining machine comprising a frame, a cutter arm projecting therefrom, a cutter chain associated with said cutter arm, a guard for said cutter chain, comprising two separated side pieces slidably supported upon said framehaving portions located above said cutter arm, a crosspiece located above the cutter arm connectlng the side uard when the cutter arm is moved into ,t e material to be cut,-

pieces together, the ends of theside pieces projectlng into a receiving space in said frame, said mining machine being supported upon the mine floor independently of the chain guard.

12. A' mining machine comprising a frame, a cutter arm projectingtherefrom, a cutting chain associated with said cutter arm, cutters on said cutter chain, a guard for said cutter chain, comprising twoside pieces each side piece having two portions, one 0 which projects downwardly in front of the chain and the other of which projects laterally over the top of the ends of the cutters on the chain, a crosspiece connecting the two side pieces together, and guides on said frame along which said side pieces move when the guard is moved, said mining machine being supported upon the mine floor independently of the chain guard.

Signed at Chicago, county of Cook, and

State of Illinois, this 8th'day of April, 1912.

CHARLES E. DAVIS.

.' Witnesses:

MINNIE M. LINDENAU, DENIE A. WALTER.

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