Year: 1897

page_text: I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
The present Specification relates to a new direct acting pump specially designed
for feeding steam boilers but capable of being utilized for all other purposes.
My pump consists essentially of a steam motor cylinder and a pump body
situated co-axially, the steam piston and water piston being fixed at the two extre-
mities of a common rod. The valve with the steam cylinder is actuated by a
special device which forms part of my invention. At the extremity of the valve
rod is fixed a small piston capable of moving in an intermediate cylinder. A pipe
extending from the delivery chamber of the pump carries water under pressure
to the intermediate cylinder where, by the action of a special rotary distributor,
it reacts alternately on each of the two faces of the little piston.
The said distributor is formed of two discs and united by a central boss. The
first disc which constitutes the distributor properly speaking, exactly fits the
distribution chamber and is applied on its end.
The distribution chamber is closed by a screwed cover which is so adjusted that
its rear face is closely applied to the corresponding face of the second disc. The
pressure existing in the interior of the distribution chamber is therefore exerted
at the same time and in opposite directions on the two discs and the distributor
is in equilibrium. Also the chamber of the second disc is slightly smaller than
that of the first disc so that a light pressure is exerted on the latter which presses
it against its seat.
The seat carries two small distribution orifices situated symmetrically on each
side of the vertical axis and a centre orifice from the exhaust. On the other hand
the orifice pierced in the distributor is by reason of the alternate rotary movement
imparted to the latter moved alternately opposite each of the distribution orifices
of the seat. Moreover, the distributor contains an interior cavity for the exhaust
and arranged in such a manner that in the mean position the two orifices of the
seat are both opened to the exhaust and as will readily be understood when the
distributor permits admission to one of the orifices the other orifice remains in
communication with the exhaust.
The alternating rotary movement of the distributor is produced by the following
arrangement: At the extremity of its axis the distributor carries a double lever

page_text: the extremities of which are raised, and side by side with which the pump rod
moves axially to and fro. This rod carries a cam piece sliding on the above-
mentioned lever which always is restored to its mean horizontal position by an
arrangement of springs. It will be readily understood that at each stroke of the
pump the cam piece sliding on the raised parts of the double lever presses the
latter downwards and communicates a corresponding movement of rotation to
the distributor.
The operation of the apparatus is as follows:--When the pump rod arrives at
the end of its stroke in one direction, the cam piece oscillates the lever of
the distributor, and the latter places its orifice in communication with one of the
two distribution orifices of its seat. The pressure due to the delivery of the
water is exerted then on the corresponding face of the little intermediate piston
and pushes the latter thereby displacing the valve of the steam cylinder which
causes the pump to move in the opposite direction. As soon as the cam piece
returns to the middle of the lever the latter under the action of the springs
resumes its horizontal position and the distributor returns to its middle position.
The portion of the small cylinder in which the pressure of the discharge has just
been exerted is thus in communication with the exhaust and the latter can begin
to act. The pump rod continuing its course the cam piece exerts its action on
the other end of the lever, an inverse movement is produced and so on.
It evidently results from this combination that if there is no water in the feed
reservoir the pump will stop itself.
It will be understood that I reserve the right of carrying out any modification
in detail in the arrangements of my improved apparatus, especially in the form
of the distribution orifices and in the arrangements of the springs for returning
the lever of the distributor to its normal position.
Dated this 10th day of February 1896
W. P. THOMPSON & Co.,
Patent Agents for the Applicant, 322, High Holborn, London; W.C.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil 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 fol-
lowing statement:―
The present application relates to a new direct acting pump specially designed
for feeding steam boilers but capable of being utilized for all other purposes.
Referring to the accompanying drawings,"
Figure 1 is a view of the whole apparatus.
Figure 2 is a transverse section on the line 1-2 of Figure 1.
Figure 3 is a front view of the surface of the distributor of the intermediate
cylinder.
Figure 4 is a section on the line 3-4 of the distributor alone.
Figure 5 is a longitudinal view of the apparatus for communicating rotary
motion to the distributor.
My pump consists essentially of a steam motor cylinder A and a pump body B
situated co-axially, the steam piston and water piston being fixed at the two

page_text: Z
extremities of a common rod T. The valve with the steam cylinder is actuated
by a special device which forms part of my invention. At the extremity of the
valve rod C is fixed a small piston D capable of moving in an intermediate cylinder E.
A pipe extending from the delivery chamber of the pump and terminating at
the opening a carries water under pressure to the intermediate cylinder E where,
by the action of a special rotary distributor F, it reacts alternately on each of the
two faces of the little piston D.
The said distributor F is formed of two discs F and F united by a central
boss. The first disc F¹, which constitutes the distributor properly speaking, exactly
fits the distribution chamber G and is applied on its end H.
The distribution chamber G is closed by a screwed cover L which is so adjusted
that its rear face is closely applied to the corresponding face of the second
disc F. The pressure existing in the interior of the distribution chamber is
therefore exerted at the same time and in opposite directions on the two discs F¹
and F and the distributor is in equilibrium. Also the area of the second disc F
is slightly smaller than that of the first disc F¹ so that a light pressure is exerted
on the latter which presses it against its seat.
The seat H carries two small distribution orifices M and N situated symmetrically
on each side of the vertical axis and a centre orifice 0 from the exhaust. On the
other hand the orifice P pierced in the distributor is by reason of the alternate
rotary movement imparted to the latter moved alternately opposite each of the
distribution orifices M and N of the seat. Moreover, the distributor F' contains
an interior cavity J for the exhaust and arranged in such a manner that in the
mean position the two orifices M and N of the seat are both opened to the
exhaust and as will readily be understood when the distributor permits admission
to one of the orifices the other orifice remains in communication with the exhaust.
The alternating rotary movement of the distributor is produced by the following
arrangement:-At the extremity of its axis the distributor F carries a double
lever K the extremities of which are raised and side by side with which the pump
rod T moves axially to and fro. This rod carries a cam piece Q sliding on the
above mentioned lever K which always is restored to its mean horizontal position
by an arrangement of springs X and X. It will be readily understood that at
each stroke of the pump the cam piece Q sliding on the raised parts of the double
lever K presses the latter downwards and communicates a corresponding movement
of rotation to the distributor.
The operation of the apparatus is as follows:-When the pump rod arrives
at the end of its stroke in one direction, the cam piece Q oscillates the lever K of
the distributor, and the latter places its orifice P in communication with one of
the two distribution orifices of its seat. The pressure due to the delivery of the
water is exerted then on the corresponding face of the little intermediate piston D
and pushes the latter thereby displacing the valve of the steam cylinder which
causes the pump to move in the opposite direction. As soon as the cam piece Q
returns to the middle of the lever K the latter under the action of the springs X
and X¹ resumes its horizontal position and the distributor returns to its middle
position. The portion of the small cylinder E in which the pressure of the dis-
charge has just been exerted is thus in communication with the exhaust and the
latter can begin to act. The pump rod continuing its course the cam piece Q
exerts its action on the other end of the lever, an inverse movement is produced,
and so on.
It evidently results from this combination that if there is no water in the feed
reservoir the pump will stop itself.
It will be understood that I reserve the right of carrying out any modification
in detail in the arrangements of my improved apparatus, especially in the form of
the distribution orifices M and N and in the arrangement of the springs for
returning the lever K of the distributor to its normal position.
In place of actuating the small piston 1 by the back pressure water of the
pump, it might be actuated by steam.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:
In a direct action pump;
1. The use of an intermediate piston to actuate the slide valve and which is
actuated by the escape water or steam.
2. The action of the escape water or of the steam produced upon the inter-
mediate piston by the play of a balanced circular distributor which gives moreover
a considerable advance for the escape in such manner as to avoid any back
pressure.
3. The alternating motion of rotation communicated to the distributor by a
bent lever upon which there acts a piece fixed to the plunger shaft of the pump.
4. The above described combination of parts constructed and operating sub-
stantially as described.
The whole substantially as described and shewn in the accompanying drawings.
Dated this 8th day of Navambar 1807
W. P. THOMPSON & Co.,
Patent Agents for the Applicant,
Of London, Liverpool, Manchester and Birmingham.
W. P. THOMPSON & Co.,
Patent Agents for the Applicant,
Of London, Liverpool, Manchester and Birmingham.