IMPROVEMENTS IN MINING MACHINES
Year: 1884

page_text: I JOHN THOMSON KING of 4 Clayton Square Liverpool in the County of
Lancaster Patent Agent, do hereby declare the nature of the said invention for
IMPROVEMENTS IN MINING MACHINES to be as follows:―
My invention relates to improvements in that class of mining machines for
which I obtained provisional protection N° 5908 of the year 1884.
The main object is to construct a machine in which the strains on the cutters
are evenly balanced the cut made by the machine is clean and perfect throughout
without any central untouched portion, and in which one set of cutters carries off
the cuttings and debris from the other set.
In carrying my invention into practice I provide a frame carrying two shafts
one behind the other gearing with endless cutter chains and driven in opposite
directions. The said chains are placed one above the other and are carried by
chains or sprocket wheels secured in the desired positions on the frame. Three of
the said wheels are located behind the forward end or cutting face of the said
machine so as to give the requisite support to the cutters. The endless chains are
composed of links made with holes in which the cutters are secured and of
connecting links secured to the cutter links by hinge pins or their equivalent.
The operation is as follows:-The machine is placed with its forward end against
the coal or rock and the cutter chains are driven in opposite directions by means
of any suitable power applied to the driving shafts, and the machine is advanced
against the coal or rock until a sufficient depth has been cut it is then withdrawn.

page_text: CONTLLIE DE EVITICATION,
I, JOHN THOMSON KING, of Liverpool, in the county of Lancaster, Patent Agent
do hereby declare the nature of the said invention for IMPROVEMENTS IN MINING
MACHINES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My invention relates to improvements in that class of mining machines for
which I obtained provisional protection No 5908 of the year 1884.
The main object is to construct a machine in which the strains on the cutters
are evenly balanced the cut made by the machine is clean and perfect throughout
without any central untouched portion and in which one set of cutters carries off
the cuttings and debris from the other set.
In carrying my invention into practice I provide a frame carrying two shafts
one behind the other gearing with endless cutter chains and driven in opposite
directions The said chains are placed one above the other and are carried by
chain or sprocket wheels secured in the desired positions on the frame. Three of
the said wheels are located behind the forward end or cutting face of the said
machine 80 as to give the requisite support to the cutters. The endless chains are
composed of links made with holes in which the cutters are secured and of
connecting links secured to the cutter links by hinge pins or their equivalent.
The operation is as follows:-The machine is placed with its forward end against
the coal or rock and the cutter chains are driven in opposite directions by means
of any suitable power applied to the driving shafts, and the machine is advanced
against the coal or rock until a sufficient depth has been cut. It is then
withdrawn.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan view of my improvement.
Figure 2 is an edge view Fig 3 is an enlarged view of the chains, some of
the links being shewn in section Fig 4 is an end view of the cutter carrying
frame, Fig 5 is a perspective view of one pair of idle wheels illustrating the passing
of the Chains over the same.
Like letters of reference indicate like parts in each.
In my improvement the shafts which drive the oppositely moving cutter chains
are arranged one behind the other as at a b Fig 1.
and is
These shafts which are vertical are provided with sprocket wheels a' b¹ by which
the cutter chains c and d are driven The sliding frame upon which the cutter
chains are mounted is composed of the bridge c bars ff and cross bar
provided with suitable guide flanges f, on the underside of the bars ƒ designed to
move in guides or ways in the stationary frame of the machine as will be readily
understood by those skilled in the art At the outer ends of the cross bar g are
idle sprocket wheels (on one side marked h h¹ and on the other h³) At the
middle of the cross bar is a pair of idle sprocket wheels it mounted on a shaft i
On the bars near the carriage e are idle sprocket wheels k k¹ and The
chains c. d. are composed of cutter links c¹ d' having holes c³ d for securing the
shanks of the cutters c³ d³ and intermediate links or bars cª d' pivotally secured to

page_text: the links c d by rivets c³ d³ and forming holes or recesses ce do for the teeth of
the sprocket wheels-The two driving Shafts a b turn in opposite directions
driving the chains c d similarly.
The operation is as follows The machine being placed with its forward end
against a breast of coal or other rock the cutters chains are driven in opposite
directions as indicated by the arrows-The chain c makes the upper and the
chain & the lower half of the cut The sprocket wheels i i¹ hold the cutters up to
their work at the middle of the cross bar g and prevent them from canting and
the wheels h h¹ h³ ³ and k k³ guide and direct the chains in their movements―The
strain on the cutters of one chain is against that of the other and as they move
past and near to each other upon the same plan and are subject to the same strains
the machine is evenly balanced and not liable to lateral displacement nor to make
an uneven cut The cut made by this machine is clean and perfect throughout
there being no central portion of the rock remaining untouched by the cutters and
requiring to be chiseled out-Furthermore the cut is cleaned by the lower
cutters d³ of all the cuttings which fall in the kerf they being pushed out by the
progressive movement of the cutters as they fall in front of them The outer ends
of the bars fare supported and braced against the strain of the cutters by the
cross bar g.
I do not limit myself to the form of chains shewn and described but include*
other forms of chains capable of carrying cutters and of being driven by suitable
wheels.
Having now particularly described, and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1 In a chain cutter mining machine the combination of two cutter chains driven
side by side in opposite directions two driving wheels turning in opposite directions
for moving the chains a frame upon which the cutter chains are mounted and idle
wheels at the outer end of the frame for guiding directing and supporting the
cutter chains and presenting them to the work substantially as and for the
purposes described.
2 In a chain cutter mining machine the combination of a cutter frame having a
cross bar extending in the line of the cut and provided with two loose sprocket
wheels at each end with two cutter chains capable of moving side by side in
opposite directions over said wheels and along the outer edge of said cross bar
substantially as and for the purposes described.
3 In a chain cutter mining machine the combination of a cutter frame having a
cross bar extending in the line of the cut and provided with loose sprocket wheels
at each end and sprocket wheels in the middle with two cutter chains capable of
moving side by side in opposite directions over said wheels and along the outer
edge of said cross bar substantially as and for the purposes described.
Da