USRE11625E - davis - Google Patents

Description

& I V A D .0

2 Sheets-sheet 1.

MININQ MACHINE.

Reissudd Aug. 10, 1897.

UNITED STATES PATENT OFFICE,

.(tITARLES-E. DAv1s, or OHIGAGO, ILLlNtHS, Assreivon 'ro rm: itvonrnnnnnr ELECTRIC COMPANY, or SAillE PLACE.

MlNl-NG-MACHINE.

SPECIFICATION forming part of Beissned Letters Patent No. 11,625, dated August 10, 1897 Original No. 583,406, dated May 25, 1897. Application for reissue filed Jiine 30, 1897. Serial No 643,016

' To cu' zi' u 'ho'n-tz't 12mg con/earn: A detailed view of the feeding mechanism. Be it known that 1, CHARLES E. DAVIS, a may be seen in Figs. 2 and 3. The armaturecitizen of the United States, residing at Chishaft 13 is provided with a pinion 13 which 'oago, in the county of Cook and State of Illimeshes with the gear B. On the end of the 5 '5 nois, have invented certain new and useful shaft of the gear-wheel B is a beveled pinion Improvements in Mining-Machines, of which B Said pinion meshes with the bevel-gear the following is specification. 011 the shaft B, to which is fastened the My invention relates to mining-machines, sprocket-wheel A that gives motion to the andhas for its object to produce a miningendless belt A". The shaft ll works in the 60 to machine provided with a new and improved bearings B B Rigid with said shaft is the feeding mechanism. cam B against which bears the roller B on The following is adescription of my device, the end of the bar D. The other end of said reference being had to the. accompanying bar bears against the arm D, fastened to the I drawings, w-herein- I sleeves D D which are loose upon the shaft 65 15 Figure 1' is a perspective view of the entire D A pawl is attached to the arm I) and machine. Fig. 2 is a plan View of the feedengages the ratchet-wheel D rigid on the ing mechanism with motor removed. Fig. shaft D The eXpansion-springl) keeps the is avertioal longitudinal section showingthe wheel 13 against the cam. B at all times.

' feeding mechanism. Fig. i is a detail. D is a pawl that prevents the ratehet-. 7o Like letters refer to like parts throughout wheel D from moving backward. The shaft the several figures. C has a clutch E o'none end which slides on Referring to Fig. 1, I' have shown here a a feather'and is adapted to engage its conncoal-mining machine that undermines the terpart E on the shaft D The bent rod or body of Coal by means of the cutting-tools A lever B connects said clutch with a similar 7 5 v A on the endless belt AC This belt works clutch E on the shaft C carrying the pinion on the sprocketflvheel A which derives its 0 which meshes with the gear C on the motion from the armature -shaft 13 of the shaft (1. These clutches are controlled in electric motor B, and also in the groove of any convenientinanner, as by arm E", rod 117,

the frame A which is attached to the frame and handle E. 80 of the motor B. -The motor B and frame A A rod .0, which may be integral with the are supported upon the guides A" A, and are bent rod or lever E or attached thereto in capable of sliding along said guides, so that an convenient manner is provided. with the the motor 13'', belt A, and frame A may he beveled end E. -"fed forward as the coal or other material is E is a beveled piece attached to the frame 85 cut away by the cutting-tools A. of the motor and situated so that when the A is arranger working in the sleeve )1, at beveled face C on the rod E comes in coniaohed to the frame Afliand reoeives its inotact with. the beveled face of the piece E'said tion from the motor 13'. The hearing or rod and the clutch E are moved so as to dis sleeve A enters the hole bored by anger is enghge llli. said (:lUECli from its counter-putt go 0 as themachine is fed forward and prevents i E and stop the machine.

any lateral motion of frame A The. motor i -lis a detailed view of the manner in and aeeonipai'iying parts are :lod forward by which the flexible belt or chain 0 is fastened means of the flexible belt or chain (f and at each end of the guide A, A lug F is fassprooket-whecls U C on shafts U C". toned to said guide and provided with a 5 C and C are idlers to change the direction hole iior the bolt 1, wh ch the ehain or of the chain. baidelmin(.Iisfnstenednt each belt L is fastened. A. spiral spring F 15 end to ihe guide It. The sproeicotwhoels placed between the lug and the washer F on (3 C receive their motion lroni the armaturcsaid bolt. These springs are used to change shaft- 15 of the illUlUi 13"., and as they revolve the stepby-Istep ieed produced by the cam w the motor and aceornpan Eng parts move low E to a eontinuousand steady feed. The mo: ward or 'hatrl'n aril, as dosh-ed. iion of the earn 13* produces a contraction 0t the springs F F the expansion ofwhich causes the said cutting-tools to be fed forward in a continuous and steady manner. The machine is held in position while at work' by means of jack-screws placed at each end of the'frame carrying the guides A. The jack-screw H at the front end of theframe is not perpendicular to the cross-pieces of the frame, but is made to project obliqnely therefromi. e.,"is bent to one side in any suitable manner, as by being bent at H. direction in which this jack-screw is bent depends upon the direction of motion of the cutting-tools A and will be in a directionopposite to the movement of the cutting-tools across the endof the frame A Thisconstruction allows the machine to be held in position at the beginning of the out before the auger A is far enough advanced to stead y 2the machine. It is evident that these several wish to be limited tothe exact construction is-out of gear.

shown.

The use and operation of my invention are as follows:

As shown in Fig. 2, the feeding mechanism If new the motor is running and it is desiredto feed the motor and its accompanying parts forward, the liandie E is moved so as to cause the clutch E on shaft 0 to engage its counterpart on the shaft- D to which. the ratchet-wheel D is attached; The motion of the motor-shaft B is communicated to the shaft B by pinion B gear Bi, pinion B and bevel-gear 3 As the shaft l3 revolves the camB is also re olved, and at every revolution the bar D is moved in the direction of the arrow. Since said bar bears against the arm D said arm is also moved, and by means .of the pawl D communicates its motion to the ratchet-wheel D and hence shaft D This motion is thus conveyed by clutch E shaft C pinion C gear Q shaft 0 to sprocket -'wheel 0 and since said sprocket wheel engages the flexible belt or chain C the motor and accompanying parts will move forward. The spring D keeps the roller B against the cam B at all times and moves the arm D and pawl D backward when said roller strikes the concentric part of the cam. The pawl E keeps the ratchet-wheei D stationary as the pawl D moves backward. If now it is desired to move the motor backward, say to start a new cut, the handle E is moved so as to disengage the clutch and bring the clutch E into engagement with its counterpart E. In this case the motion of the ratchet-wheel l) is conveyed to the shaft 0 and thence to sprocket-wheel C.

Said sprooket-wheel'will be moved in a direction opposite to its former motion, and since it engages the stationary flexible belt or chain '0 the motor and accompanying parts will be moved'backward; The speed of the forward feed depends upon the size of the cam B The ratchetwheel D i sprociretwhsei 6 T pends oniyon cam sprocket-wheel t"; movement of the '11 parts will be much the forward feed, ings.

The springs E E as before explained, change the step-by-step feed due to the occentric movement of the cam E into a steady and continuous feed, for as the machine is being fed forward the pressure of the cuttingtoois' against the bed of coal or other material resists their forward movement, and hence instead of. said cutting-tools being moved suddenly forward at each revolution of the cam the springs F F take up the motion by their contraction and force the cutting-tools raetice than forward by their expansion as the coal or other substanceis cut away. It will thus be seen that a continuous feed is assured. ,The bending of the jack-screw H to one side causes the machine to be held in position at the be ginning of the out before the auger A has bored a hole of sufficient depth to allow the sleeve A to enter and steady the machine.

It will be seen that if the cutting-tools, Fig. 1, are moving across the end of the frameA in the direction of the arrow the pressure that they exertagaiust the wall to be undermined will tend to force the frame. to one side or in the opposite direction of thearrow: If new the jackscrew H projects in a straight in the drmw line forward and upward, as indicated in full lines, any'motion of the frame to one side will tend to decrease thepressure exerted by the jack-screws and allow the frame to be more easily moved. It is found inpractice that under these conditions the machine cannot be satisfactorily held in position at the I beginning of the cut without other securing devices. W hen the jack-screw is bent to one side, as shown in dotted lines in Fig. 1, the pressure effected bythe contactofthe cutting tools with the wall to be undermined causes an increase in the pressure exerted by the jack-screw, and hence adds to its holding capacity; It will thus be seen that the ma chine'will be firmly held in position at the beginning of the out without the aid of other securing devices. When the motor reaches the limit of its backward motion, the end of the rodEi, to which is connected the clutch.

E, comes in contact with the beveled face of cam, the other end of said barhearing against an arm carrying a pawl-that engages a I ay ratchet-wheel, means for holding said arm and bar in engagement, and two shafts adapted to be alternately connected to the ratchet- .Wheel and provided with SPIOQlIQiL-WlIOGlS that engage a single stationary rack whereby the mining-machine may be moved forward or backward.

2. A mining-machine comprising a motor, a cam, means of communicating the motion of the motor to the cam, connections between the cam and a feeding ratchetmheel, two shafts carrying sprocketwvheels that engage a stationary chain, a clutch associated With one of said shafts adapted to engage the sh aft of the feeding ratchet-Wheel and feed the maa sprocket-wliieel which engages a stationary chain, clutches associated with said shafts and adapted to engage the shaft of the feeding ratchet-wheel, and a controlling-handle connected with both of said clutchesm'hereby, when the said machine is in operation a movement of said handle in one direction causes the mining-machine to be fed forward, and a movement in the other direction causes said machine to be moved backward, substantially as described.

4. A feeding mechanism for mining-machines comprising a stationary, flexible chain elastically attached to the guides or frame along which the machine moves, a motor and connections between said motor and the flexible chain.

5. A feeding device for mining-machines comprising a revoluble cam, means by which the motion of the cam is communicated to a ratchet-wheel, and a flexible chain elastically attached to some part of the frz-tm'e of the machine, and connections between said ratchet I wheel and chain, whereby the step-by-stcp feed due to the cam is con vcried into a steady continuous feed.

6. in a mining-nmchinc the combination of a cutter carrier with a motor for driving the same, mechanism for feeding said cutter-carrier bodily against the coal to be cut by a step-by-step motion, an elastic power-transmittin g spring connected with the machine so as to be interposed between the cutter-carrier and the step-by-step feeding device.

7. A mini rig-machine comprising two frames movable with relation to each other, a cutting device connected With one of said frames, a motor also mounted upon one of said frames and adapted to drive said cutter, a rack attached to the other frame by an elastic connection and a connecting mechanism between said rack and motor, whereby the cutter is elastically fed against the coal.

8. In a mining-machine, the combination of a continuously-rotating motor, a cutter-car rying frame with guides along which it moves, and a single flexible chain on the guides, a portion of which is elastic and sprocketwheels on the moving frame in engagement with the chain, and driving mechanism for said sprockets whereby they are adapted to .be altcrnately'operatively rotated in opposite directions, one of said sprockets adapted to travel upon the-,rack morev rapidly than the other, so as to feed the frame forward slowly and Withdraw it rapidly.

O. In a mining-machine of the breast-machine type, the combination of a movable frame carrying the cutter-chaima stationar r CHARLES E. DAVIS.

Witnesses:

DONALD M. CARTER, HOMER L. KRAFT.

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