US1274516A - Mining-machine. - Google Patents

Description

C. E. DAVIS.

MINING MACHINE.

APPLICATION FILED MAYIO. 191s. RENEWED IAN-1.1918.

1,274,516. Patented Aug. 6, 191&-

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MINING MACHINE.

APPLICATION FILED MAY I0. I915- RENEWED IAN- 7. I9l8.

Patented Aug. 6, 1918.

3 SHEETS-SHEET 2 c. DAVIS.

MINING MACHINE.

APPLICATION FILED MAY10.19I5- RENEWED JAN. 7,1918.

Patented Aug. 6, 1918.

3 SHEETS-SHEET 3 UNITED STATES PATEN T OFFICE.

CHARLES E. DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR T0 GOODMAN MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MININGMACHINE.

Specification of Letters Patent.

Patented Aug. 6, 1918.

Application filed May 10, 1915, Serial No. 26,990. Renewed January 7, 1918. Serial No. 210,771.

To all whom it may concern:

Be it known that I, CHARLES E. DAVIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Mining-Machines,of which the following is a specification.

This invention relates to mining machines and has for its object to provide an electric system of control therefor.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a diagrammatic view showing the mining machine in operation;

Fig. 2 is a vertical section view through one form of mining machine in connection with which the invention is used;

Fig. 3 is a plan view with parts omitted, of the machine shown in Fig. 2;

Fig. 4 is a sectional view taken on line 44 of Fig. 3;

Fig. 5 is a diagrammatic view showing the electric circuits.

Like numerals refer to like parts through out the several figures.

As illustrated in the drawing, the mining machine is provided with a main frame 1, mounted upon wheels 2, a supporting frame 3 is mounted on the main frame and is connected therewith. The supporting frame 3 is arranged so that it may be moved longitudinally and laterally with relation to the main frame. As herein shown, it is pivoted to a tooth part or wheel 4 by means of a pivot 5. Part 4 is rotatably mounted upon the shaft 6 connected with the main frame 1. A flexible belt 7 engages the toothed part 4 and is driven by a driving wheel 8 fastened to a shaft 9. This shaft is provided with a worm wheel 10, which engages a worm 11 on a shaft 12, said latter shaft being connected with the feeding motor. This connection may be made in any desired manner. As herein shown, the shaft 12 is provided with a gear 13 loosely mounted thereon, which engages a gear 14 on the armature shaft of the motor 15. A sliding clutch member 16 on tlf'eshaft 12 connects and disconnects the gear 13 and the shaft 12. Connected with the toothed part 4 is a toothed part 4. A flexible belt 4 engages said toothed part and is connected with a pin or pivot 4, the two ends being connected to said pivot as shown in Fig. 3. This pivot works in a guideway 4. The pivot 4 works in a guideway 4 in the supporting frame. The gear 13 also engages a gear 17 loosely mounted on a shaft 17, the shaft and gear being connected and disconnected by the sliding clutch member 18, the shaft 17 provided with a worm 19 which engages a worm wheel 20 on a shaft 21, carrying a drum 22, about which a flexible cable .28 is wound. This flexible cable passes around direction changing pulleys 24 on the supporting frame, and is adapted to be used for moving the machine forward to force the cutter arm into the coal in making the initial cut, and for moving it backward to withdraw the cutter arm from the coal atthe end of the cut. The shaft 25 of the motor 15 is provided with a bevel gear 26 loosely mounted thereon, and a sliding clutch member 27 con trolled by the handle 28 and adapted to engage a clutch member on the bevel gear so as to connect the gear and the shaft. The bevel gear 26 engages the bevel gear 29 on the shaft 30. which passes through the main frame 1. This shaft is provided below the main frame with a bevel gear 31, which engages a bevel gear 32 on a shaft 33. The shaft 33 supplies the power for thefwheels 2 for moving the machine from place to place. As shown, this shaft is provided with a sprocket wheel 34 and a flexible belt 35 which engages a sprocket wheel 36 on the axle 37. The other axle 38 is driven by a belt 39. The supporting frame 3 is'provided with the supports 40 provided with the racks 41. Between these supports is located a cutting element 42, which is provided with pinions 43 at the sides thereof, said pinions engaging the racks 41. The pinions 43 are on the shafts 44, said shafts being driven from the motor 45 through the bevel gears 46 and 47, the shaft 48, the worm 49. the worm wheel 50, the shaft 51, worm and worm wheel 52, said worms bemg located on the shaft 51. The cutting element is provided with a cutting device,

which may be of any desired form and which is operated by the motor 45. As herein shown, this cutting device consists of a cutter arm 54, provided with a cutter chain driven by the sprocket wheel which in turn is driven through the bevel gears 46 by'the motor 45.

In the operation of the machine, the motor 45 is used to operate the cutting element. This requires a large amount of power and this motor is a comparatively large motor. The motor 15 is used to perform two functions. one to move the supporting frame 3 and the cutting element 42 so as to force the cutter across the face of the coal as shown in Fig. 1. During this operation the motor 15 must run at a comparatively slow speed and develop a small horsepower. The motor 15 is also used to move the entire machine from place to place by driving the wheels 2. During this operation the motor is required to develop a high horse power. The resistance required to permit the motor to perform these two functions must necessarily be large and there is no place for it on the machine. This difficulty is overcome by providing a resistance for the motor 15, sufiicient to permit it to perform one of its functions, that is, the function of feeding, and then arranging so that the resistance used in connection with the large motor 45' can be also used with the small motor when it is performing its other function, that is, moving the machine from place to place. I prefer also to provide means so that when the machine is in operation cutting coal the motor 45 cannot be stopped while the motor 15 is running so as to cause the machine to feed when the cutter is not running, for under such conditions the machine would be broken or the motor burned out.

In Fig. 5 I have shown a diagram of circuits for eliminating these difficulties. In this diagram when the motor 45 is running to actuate the cutterit is controlled by the resistance 60. Vhen the motor 15 acting in its capacity to move the supporting frame 3 so as to feed the cutter to the coal. the resistance 61 is used. Vhen the circuit through the motor 45 is first completed. all the resistance 60 is in circuit and the circuit will be traced as follows: from the terminal 62 through the crmductor 63 to the controller contact 64 of the controller 64. lVhen the motor is first started up, the controller contact 65 is in contact with the contact- 64, and hence the current passes to contact 65 and then through contacts 66, 67, 68 and 69 to contact 70, which is then in contact with contact 71. The current then passes from contact 71 to conductor 72 to point 73. The current then passes by conductor 74 to the resistance 60 and thence through one section thereof and then by conductor 75 to the other section thereof and then by conductor 76 to the reversing switch 77, thence through contacts 78, 79 and 80, which are then in contact, to conductor 81 and thence to blade 82 of the controlling switch 83 and thence to contact 84 of said controlling switch, the blade 82- then being in contact with contact 84 and thence by conductor 85 to the armature 86 of motor 45, thence by conductor 87 to the contact 88, thence to blade 89 of the switch 83, the blade and contact then being in contact, thence by conductor 90 and thence through contacts 91, 92, and 93 of the reversing switch, thence by conductor 94 to the blade 95 of the switch 83, thence to contact 96, thence by conductor 97 through the series fields 98 of the motor 45 and thence by conductor 99 to the terminal 100.

A portion of the current passes from the point 73 through the conductor 101 to the shunt field coils 98 of the motor 45 and thence to conductor 99 and terminal 100. As

the controller for the motor 45 is operated, the contacts 66, 67:68 and 69 are successively brought into contact with the contacts 66, 67, 68 and 69., and the several sections of the resistance 60 are successively cut out of the circuit. When the contact 69 engages contact 69 all of said resistance is out of circuit. After the motor 45 is in operation so as to drive the cutter, the motor 15 is started up by actuating the controller 102 so as to bring the upper and lower contacts into contact with their opposed contacts. The circuit will then be traced as follows: from terminal 62 through conductor 63, thence to contacts 64 and 65 of the controller 64, thence through contacts 66, 67, 68 and 69 to contact 69 (the controller 64 in this case being moved so that all the resistance 60 is out of circuit), thence through conductor 72 to conductor 76, thence through conductor 103 to contact 104 of controller 102, thence to contact 105, which at this time is in contact with contact 104, then through contacts 106, 107, 108, 109 and 110 to con tact 111. thence by conductor 116 to resist ance 61, thence by conductor 117 to conductor 118. thence to contact 119 of the reversing switch 120 of motor 15, thence to contacts 121 and 122, which are now in engagement, thence by conductor 123 to the blade 124 of the switch 83, thence to contact 125, which is now in contact with said blade, thence through conductor 126 to the armature 127 of the motor 15, thence by conductor 128 to contact 129, thence to switch blade 130 which is now in contact with contact 129, thence by conductor 131 to contact 132, thence through contact 133 to contact 131, thence by conductor 135 to switch blade 130, thence to contact 137, thence by conductor 138 through the field 139 of motor 15, thence to conductor 99 and terminal 100. As the controller 102 is operated contacts 106, 107, 108, and 109 are successi ely brought into contact with their opposed contacts 112, 113, 11 4 and 115 so as to gradually cut out sections of the resistance 61.

It will be seen that by this construction the motor 15. which feeds the cutter to the coal cannot be operated to so feed said cutter to the coal except when the motor 45, which actuates the cutter is in operation, for when the controller (31 is moved to disconnect motor 45 from the circuit, the circuit through the small motor 15 is also broken be 'ausc said circuit must pass through the controller (51. In view of the fact that the circuit of the small motor passes through the controller (34, it will also be seen that any portions of the resistance ()0 which are in circuit with the motor -15 will also be in circuit with the motor 15.

If it is now desired to connect the motor 15 with the axles of the wheels 2 so as to move the machine from place to place, the clutch member 27 is moved so as to connect the bevel gear 26 with the motor shaft 25 and the switch 83 is moved to the position shown in Fig. 5. so that the blades thereof make contact with the contacts 140, 141 and 142. This cuts the motor 45 out of circuit and disconnects the motor 15 from its con troller 102 and connects it with the controller 61 and the resistance 60 of the motor 45. The circuit will then be traced as follows: from terminal 62. through conductor (53, thence to contact 64, thence through contacts 65. 66, 67, 68, 69 and 70 to contact 71, thence through conductors 72 and 74, thence through the resistance. thence through conductor 76 to contact 78. thence through contacts 79 and 80 to conductor 81, thence to switch blade 82 and contact 140. thence by conductor 143 to conductor 126, thence tl'irough the armature of motor 15, thence by conductors 123 and 144 to contact 142 and switch blade 89, thence by conductor 90 to contact 91, thence through contacts 92 and 93 and conductor 94 to switch blade 95 and contact 141, thence by conductor 145 to conductor 138, thence through the fields 139 of the motor 15 and thence through conductor 99 to terminal 100.

It will thus be. seen that the motor 15 is now operated by the resistance 60, and that this resistance may be cut in or out by operating the controller 64.

I have described in detail a particular construction embodying my invention, but it is of course evident that the parts may be varied in many particulars without departing from the spirit of my invention. and I .-therefore do not limit mvself to the particular construction shown.

I claim:

1. A cutting machine comprising a main frame, wheels upon which said frame is carried, a driving motor adapted to be operatively connected with said wheels, a supporting frame movably mounted on the main frame. a cutting element carried by said supporting frame, a cutter forming a part of said cutting element, a motor for actuating said cutter, a controlling resistance for said cutter actuating motor, means for connecting the driving motor with said supporting frame so as to move it to feed the cutter toward the material to be cut, a controlling resistance for said driving motor, and means for connecting said driving motor with the controlling resistance of the cutter actuating motor when the driving motor is disconnected from the supporting frame and connected with said wheels.

2. A cutting machine comprising a main frame, a supporting f ame movably mounted thereon, a cutting element carried by said supporting frame, said cutting element provided with a cutting devicefor cutting the material to be acted upon, a motor for actuating said cutting device, a controlling resistance for said cutter actuating motor, a controlling switch for said controlling resistance, a second motor operatively connected with said supporting frame so as to move it to feed the cutting device toward the material to be acted upon, a controlling resistance therefor, a controlling switch for said controlling resistance, and means for connecting the controlling switch for the cutter actuating motor in circuit with the second motor, whereby the second motor cannot be operated except when the cutter actuating motor is in operation.

3. A cutting machine comprising a cutting device, a motor for actuating the cutting'device, a, controlling resistance for said motor, a controlling switch for controlling said resistance, a second motor for moving said cutting device so as to feed it toward the material to be cut. a controlling resist: ance therefor, a controlling switch for said cont-rolling resistance, and means for connecting said second motor in the circuit of the controlling switch for the motor for actuating the cutting device. whereby the second motor cannot be operated except when the motor for actuating the cutting device is operated.

4. A cutting machine comprising a frame, supporting wheels for said frame. a cutting device supported on said frame, a motor for actuating said cutting device, a controlling resistance for said motor. a second motor for feeding the cutting device toward the material to be cut, a controlling resistance for In testimony whereof, I affix my signasaid second motor, means for connecting and ture in the presence of two witnesses this 1 disconnecting saild secolrlid motor with szitid 22nd day of April, 1915. wheels so as to rive t em, and means or v 0 connecting the second motor in circuit With CHARLES DAVIS the resistance of the cutter actuating motor Witnesses: when the said second motor is connected MINNIE. M. LINDENAU, with said wheels. ELLA THIEME.

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