An Improved Method for Testing Tubes or Fittings.
Year: 1894

page_text: Date of Application, 29th Oct., 1894
Complete Specification Left, 25th Jan., 1895-Accepted, 29th Nov., 1895
PROVISIONAL SPECIFICATION.
An Improved Method for Testing Tubes or Fittings.
JAMES DAVIES Meeting Street Engine Works Wednesbury Engineer do:
hereby declare the nature of this invention to be as follows:-
A moveable ram to be propelled by steam or water & by valve or valves being'
placed in the ram & set by springs or otherwise to a pressure sufficient to carry the
ram out up to the tubes or fittings to be tested by water or steam & make the joint
& then the pressure being greater than the valves weighted inside the ram or rams
opens the valve or valves & the water or steam then passes through the valves into
the tube or fittings to be tested then acts on the moveable ram in proportion to the
pressure on the tube tested & make the joint at the ends of tube or fittings. The
movable head for the varying lengths of tubes is carried on rollers on the stay
bars with suitable notches or holes & a bar with a spring is made to fall in the
notches or holes to stop the head from moving.
Dated this 27th day of October 1894.
JAMES DAVIES.
An Improved Method for Testing Tubes or Fittings.
JAMES DAVIES Engineer Meeting Street Engine Works Wednesbury in the
County of Stafford Mechanical Engineer 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 :-
With a view to making more efficient the testing of tubes & fittings my
improvements consist of a seltacting ram in place of screw, & shooting bolts in
loose or moveable head in place of present stops.
I will now describe the present mode of testing tubes or fittings. To make the
joints on ends of pipes or fittings a moveable head is used with a long screw with
stop fitted on to make joint & by screwing this stop against the tube or fitting the
joint is made so that the pressure inside does not escape.
My improvements or invention consists of a moveable ram propelled forward by
the pressure used in testing & acting against the ram which propells or forces it
against the tube & thus makes the joint taking the place of the screw.
The valve or valves are inside the ram & the spring holds the valve so that no
water can pass through the ram until the ram comes in contact with the tube or
fitting thus making the joint.
The ram now being against the tube & the joint made the ram is stationary &
the pressure overcoming the valve springs opens the valve the water then passes
through the ram in to the tube or fittings to be tested.
The area of ram being larger than area of tube to be tested exerts greater force
against the tube, than the internal pressure in the tube & thus keeps the joints
sealed at all the varying pressures.
I will now proceed to describe my invention with reference to accompanying
drawings & the manner in which it is to be performed.

page_text: Fig.
represents in section, the ram full size for small tester showing the valve
& spring in the ram.
Fig. 2 represents sectional plan of an arrangement for testing fittings, such as
bends ellbows tee pecies &c.
Fig. 3 section of loose or moveable head showing methods of shooting the bolts
into the bars.
Fig. 4 shows dies to hold fittings.
Fig. 5 a general view of crdinary machine with the improvements of ram &
loose head.
Fig. 6 elevation of Figure 2.
Fig. 1A is the moveable ram sliding in the cylinder E & propelled forward by
steam or water & drawn back by spring or weight not shown.
B is a valve or valves fitted in ram A & set by spring C sufficiently strong to
carry the ram A out to end of tube & so make the joint. The ram then becomes
statiquary, & the pressure in space A 2 forces the valve B open & allows the water
to, pass through into the tube or fittings.
As the pressure on the area of moveable ram is greater in proportion than that
required for testing, I am able to dispence with the screwing up & unscrewing of
joins of tube
Fig. 2 shows the application of moveable rams for testing fittings.
A. B. D. represents the same application as in Figure 1 for testing bends or
fittings each ram forming a stop & making joints same as testing pipe before
.described.
C moveable rests adjusted by screws to fit different sizes.
F fixed poppets.
E dies to hold fittings.
By placing bends or fittings between the sliding rests C & nonnets F & annlving