AN IMPROVED STEAM PUMP
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Jacob Gowland Joicey at
the Office of the Commissioners of Patents on the 10th April 1883.
JACOB GOWLAND JOICEY of the City and County of Newcastle upon Tyne,
Engineer, "AN IMPROVED STEAM PUMP
"
My invention relates to an improved form of steam pump and consists, firstly, in
opening and closing the suction and delivery passages of the punp by means of a
reciprocating piston valve working in a cylindrical case, preferably fitted with a
lining of brass or other suitablo metal. This piston valve is so arranged with
regard to the suction and delivery passages that they completely surround it and
keep it constantly in equilibrium. The piston valve is worked by an eccentric, or
equivalent, from the fly wheel shaft and has a considerable travel so as to give free
suction and delivery openings.
The second part of my invention consists in connecting the piston rod of the
steam cylinder and that of the pump to a crosshead fitted with a sliding block
constructed as follows:-The opposite sides of the crosshead form, in section,
concave portions of a circle and are of sufficient length to allow for the travel of
the sliding block which is formed of a middle piece, preferably of brass, taking
hold of the crank pin, and of two outside shoes, into recesses in which the middle
piece fits accurately. One of these shoe pieces is fitted with a half brass round the
crank pin adjustable to take up the wear. The outer edges of the two shoe pieces
are turned convex so as to exactly slide in the concave portions of the crosshead as
the crank revolves and can be set out so as to take up the wear between their surfaces
and those of the crosshead. The advantages of the piston valve are;-working
frictionless, as to the weight of the column or pressure worked against, and con-
sequent absence of wear and tear; a perfectly free water way enabling it to pass
such substance as would choke ordinary valves; great power of suction and the
delivery of a full and continuous stream.
The crosshead is simple in construction and can be altogether finished by boring out
in the lathe. The sliding block is also simple, and when put together can have its
surfaces turned in the lathe and is easily adjustable to take up the wear without
interfering with the crosshead.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Jacob Gowland Joicey in the Great Seal Patent Office on the
10th October 1883.
JACOB GOWLAND JOICEY of the City and County of Newcastle upon Tyne
Engineer AN IMPROVED STEAM 'PUMP-
5
My invention relates to an improved form of Steam Pump and consists firstly in
opening and closing the suction and delivery passages of the pump, by means of a
reciprocating piston valve working in a cylindrical case, preferably fitted with a
lining.of brass or other suitable metal. This piston valve is so arranged with
regard to the suction and delivery passages that they completely surround it and 1
keep it constantly in equilibrium. The piston valve is worked by an eccentric, or
cquivalent, from the fly wheel shaft and has a considerable travel so as to give free
suction and delivery openings. The second part of my invention consists in con-
necting the piston rod of the steam cylinder and that of the pump to a crosshead
fitted with a sliding block, constructed as follows:―
1
The opposite sides of the crosshead form, in section, concave portions of a circle
and are of sufficient length to allow for the travel of the sliding block which is
formnod of a middle piece, preferably of brass, taking hold of the crank pin, and of
two outside shoes with recesses, in which the middle piece fits accurately. One of
these shoe picces is fitted with a half brass round the crank pin adjustable to take 2
up the wear. The outer edges of the two shoe pieces are turned convex so as to
exactly slide in the concave portions of the crosshead as the crank revolves and
can be set out so as to take up the wear between their surfaces and those of the
crosshead
The advantages of the piston valve are; working frictionless, as to the weight of 2
the column or pressure worked against, and consequent absence of wear and tear;
a perfectly free water way enabling it to pass such substance as would choke
ordinary valves; great power of suction and the delivery of a full and continuous
stream
The crosshead is simple in construction and can be altogether finished by boring 3
out in the lathe. The sliding block is also simple and when put together can have
its surfaces turned in the lathe and is casily adjustable to take up the wear without
interfering with the crosshead.

page_text: arrows the delivery. It will be seen that the suction and delivery currents both
completely surround the Valve V which at any point of its travel is perfectly in
equilibrium and by working the valve by a separate eccentric, or crank, with a
large throw the valve opens very rapidly at beginning of stroke and when full
open it has a very slow motion in closing the water ways.
The valve chamber C is casily accessible by the door shown at back and by the
suction and delivery branches which may not be used and the valve V is readily
withdrawn through the upper cover.
Packing rings inay be fitted to the valve but I have not in practice found these
requisite the friction being almost nil.
In Figure 3 and the end view on Figure 1 J. J are the jaws of the crosshead
formed in one piece united at the ends and receiving the piston and pump rods
respectively. The working path of the block, forms segments of a circle and the
shoe pieces S. S¹ are turned on their outer surfaces to same circle. B is the block
preferably of brass receiving the crank pin C and having a cavity to receive n
keep formed on the shoe piece S' fitted with an adjustable bearance. The wear
between the surfaces of the shoes S. S' and the surfaces of the jaws J. J' is adjusted
by the set screws.
Having now described my invention and illustrated the mode in which I have
carried it into successful practical application I would have it understood that I do
not restrict myself to precise details of construction but that what I claim as new
and secured to me by Letters Patent herein before in part rocited is :-
Firstly. A pump having the suction and delivery passages surrounding a
cylindrical piston valve constructed and operating substantially as shewn and
described.
Secondly. A crosshead to connect a prime mover and a pump, to which the
power is to be applied, with a crank controlling the stroke of the prime mover by
n sliding block fitted with adjustable shoes constructed and operating substantially
as shewn and described.
Thirdly. A steamp pump consisting of the steam cylinder, pump piston valve,
crosshead and other parts substantially as shewn and described.
In witness whereof I the said Jacob Gowland Joicey have hereunto set my
hand and seal this ninth day of October in the year of our Lord one thousand
eight hundred and eighty three
T A ΤΟΤΟΠΟ
Witness:
T. J. DANSON F. Inst. P. Agents
Consulting Engineer
Newcastle on Tyne.
J. C. JOICEY, (1.5.)