PATENT HYDRAULIC COAL CUTTING MACHINE. 
vr 
This Machine undercuts, holes, or kirves four ft 
any height from floor or rails, being suitable for cither 
This apparatus is actuated by the pressure of 
attached to any existing engine. 01 from an engine and 
sulticicnt to hll the circuit <>f the pipe.-, using it over 
Where Engine and Tumps are required to n 
2-inch bore wrought-iron pipes, to stand 5i)ll|bs. pre: 
adapt themselves readily tu the irregularities of the fl< 
i '*ns| " Z 7l in u,i", U ' U '~'"n "V' "J 
hich can be obtained either horn the stand 
.pecially made for the purpose. The quantity i 
again when desirable. 
ike the water pressure, their cost, to supply two Mach 
sure, at 3j. bV. per yard. These pipes are screwed to-., 
or of mine. An India-rubber ] >ip L - i.f H-inch bore, siuta 
inches bore, ser 
1-Cutting Machir 
imng 
the M; 
Ordinary gas pipes, 
This Scif-Acting C 
anil transported from place 
The mechanism emj 
motion. The cylinder is 1 i no. 1 w ith brass, and the 
steel, within which is attached the cutter-bar, also c 
be holed at one operation. 
The cutting tools are easily made, are very strong and ca 
an ordinary grindstone. The cutter-bar is also 'removable whci 
cylinder is, for the time being, sieved longitudinal „ ,tl, the rails. 
The Machine in operation lives itself den,! fast upon the rails , 
and traverses forward, the requisite amount for the next cut without a 
at one cut. they will continue to make more strokes at the same i.I k 
traverse ilscll lorwar.1 the required amount foi the next cut. 
Thus at one operation, a uniform straight depth is attained par 
down, and thereby a straight line foi the new coal face 
There is no percussive action, cither against the roof or into tl 
eating motion at 25 strokes per minute. 
There is, consequently, no dust, and little noise and wear and tear 
There kno linV, wh ™ u """" "' c '" ols """" "»« no'sparks, and the workn 
t here is no limn to Uic pressure «l water th.U mav be used, nor the distinct' ,, „,.... bc r orce j 
to .rrnte" 6 ™" Tl * *" ne P"™™ lo SSv^ZSUftSSZ, 
.. . .1" *« w ° rki "6 of , Coal Mines the safety of the workman is of great importance which t 
than when worked by hand labour i 
tiling s|p,k L -, and relea-c. itself" at the back or return sin 
ibour. Should the tools be prevented making the full str 
Maximum depth is attained, when, "only," the Maelnne 
e rails, inducing an even fracture when the coals are broi 
simply a concentrated pressure, producing a steady recii 
i goes far to accomplish. Thus by 
earn will yield mure by I, on:) u>ik 
