Improvements in Hydraulic Apparatus for Testing Steam Boilers and other Vessels.
Year: 1888

page_text: Date of Application, 18th Jan., 1888
Complete Specification Left, 16th Oct., 1888
Complete Specification Accepted, 18th Jan 1889
Improvements in Hydraulic Apparatus for Testing Steam Boilers
and other Vessels.
GEORGE MUNRO 89 Selborne Street Liverpool Engineer do hereby declare the
nature of this invention to be as follows:-
A cylinder with a top and bottom cover, jointed same as a steam or Hydrulic
cylinder. The centre part of the top cover, is threaded for a screwed piston rod to
revolve in, the screwed piston rod has on the outer end a wheel, or spokes, attached
to enable the operator to raise or lower the screwed piston rod, which is fixed to the
piston by a musheroom joint, or other suitable connection, so that by raising or
lowering the piston the screwed piston rod can revolve in the top cover without the
piston revolving in the cylinder the bottom cover of the cylinder has a pipe connection
to connect onto the boiler or vessel requiring to be tested.
The working of the apparatus is as follows the piston of the cylinder is raised to
the top by the screwed piston rod, it is attached to the boiler or vessel, to be tested,
by means of the pipe connection, the boiler or vessel is then filled with water which
flows into the boiler or vessel & into the cylinder, when completely full & all joints
secure & tight, the cylinder being full of water, the operator screws down the
screwed piston rod, & which compresses the piston. & the water contained in the.
cylinder through the pipe connection to the boiler, or other vessel being tested.
.
My chief claim in this invention is its simplicity of construction I require no valves
or intricate parts that are liable as in others to get out of order, also the rapidity in
which it can be worked.

page_text: COMPLETE SPECIFICATION.
'
Improvements in Hydraulic Apparatus for Testing Steam Boilers
and other Vessels.
GEORGE MUNRO 89 Selborne Street Liverpool do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
A cylinder with a top and bottom cover, jointed same as a steam or hydraulic
cylinder. The centre part of the top cover is threaded for a screwed piston rod to
revolve. The screwed piston rod, has on the outer end, a wheel or spokes attached to
enable the operator to raise or lower the screwed piston rod, which is fixed to the
piston by a mushrom joint, or other suitable connector, so that by raising or lowering
the piston, the screwed piston rod can revolve in the top cover, without the piston
revolving in the cylinder. The bottom cover of the cylinder has a discharge or feed
pipe D connection to boiler or vessel to be tested, with a stop cock marked D on the
drawings on sheets.
There is also a supplying or suction pipe to cylinder marked S on each of the
drawings on sheets 1 and 2.
If the testing apparatus is single acting, that is, if it discharges water under
pressure from only one end of the cylinder, or when the piston moves only in one
direction, it is made according to the design of the arrangement shown on
sheet 1.
If it is double acting, that is, if it discharges water under pressure at both ends of
the cylinder, or when the piston moves in either direction, it is made to the design of
the arrangements shown on sheet 2.
When the apparatus is of the single acting form it is worked as follows:-
The piston being brought to that end of the cylinder adjacent to the cover through
which the piston is threaded, the cylinder is filled with water through the pipe S, and
the cock is closed.
The cock D is then opened, and the piston forced down by turning the wheel W
the water being forced through the pipe D into the boiler or vessel to be tested until
the desired pressure is reached.
:-
When the apparatus is double acting it is worked as follows:-The suction pipe S
is connected to some water supply or main, and the discharge pipe is connected to the
boiler or vessel to be tested. The action of the operation of testing is as follows:-
The piston is reciprocated by the wheel W, by the threaded portion of the piston rod
working in the cover as shown at T, the outer end of the piston rod is plain, in order
to make it water-tight by an ordinary stuffing box and gland as shown at B.
The piston draws water through either suction valve S V, or S V2, and discharges
the water already in the cylinder through either of the valves D V, or DV, according
to the direction of its working.
1

page_text: The discharged water passes through the discharge pipe D, and the working of the
piston is continued until the desired pressure is reached.
It must be clearly-understood that I do not show the only arrangements possible
to carry out my invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
-
The manufacture and use of. Hydraulic Apparatus for testing Steam Boilers and
other vessels substantially as described and shown on the accompanying drawings.