526 APPLIED MECHANICS 
Attached to the large ram there is a straight round rod having a dia: ne 
equal to that of the inside of the lead pipe. This rod passes up 
the centre of the die. The lead i II 
in a molten state, is poured in Air screw. LuaGZ 
at D, and when it has solidified, WY — 
but while still hot, the large Charging screw y 
NX 
D 
ram is 
Zz 
, Y 
Y © 
LLL 
fpllsiididisiiplisisbisplisilisiss sles 
forced : 
up, and os ( Lever. } | 
the lead 
is squirted through the die on the end of 
the smaller ram, coming out at D in the 
form of a pipe. An enlarged section of the 
part of the apparatus in the neighbourhood 
of the die is shown at (a). 
SS 
Lowering screw: 
RSX WW i AANA 
<& 
SS 
Sa Be oe i asm an AS AS aS aS Sen) ase Os EGS wee et ee ae 
MQ 
E\ 
‘ie 
SS 
ss 
Fie. 838. Fig. 839. 
456. Hydraulic Lifting Jack.—Fig. 839 shows a hydraulic liftin 
jack made by Messrs. Tangyes of Birmingham. The ram is spread out 
at its lower end to form a base upon which the jack stands. To th 
top of the ram is attached a cup-leather to form a water-tight joir 
between the ram and the cylinder. The pump is screwed into the te De . 
the cylinder, and is surrounded by a casing attached to the cylinder 
The cover of this casing forms the bed for the load under which the jack 
is placed, or the load may be carried on the claw formed on the lower end 
