AN IMPROVED PUMP
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan; of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster, Civil
Engineer for an Invention of AN IMPROVED PUMP communicated to him
from abroad by Alphonse Reis, of Antwerp, in the kingdom of Belgium
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 10th December 1883.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer,
" AN
IMPROVED PUMP," a communication to me from abroad by Alphonse Reis, of
Antwerp, in the kingdom of Belgium,
The improved pump comprises substantially a fixed cylinder made of two parts
or lengths projecting one into the other, each part or barrel having inside an annular
cavity communicating respectively with the suction and the discharge pipe; a
second cylinder adapted to slide inside the fixed cylinder like a piston and
provided with apertures corresponding with the cavities of the fixed cylinder, the
said second cylinder being set in motion by a specially shaped cam adapted to
serve at the same time as a crank for setting in motion a ram piston working in
the movable cylinder just mentioned; a ram piston; and a cam mounted on the
driving shaft.
The cam carries on its face the crank pin for driving the piston, while its
circumference works between a pair of friction rollers secured to a frame attached
to the movable cylinder. The said frame is guided in the axis of the cylinder by
a circular disc formed on the back of the cam and fitting between the two guide
bars which connect the bearings of the friction rollers. The bottom of the inovable
cylinder is placed at some distance from its rear end, so as to nearly come in
contact with the bottom of the ram piston when the latter is in its innermost
position. The fixed cylinder carries three stuffing boxes or packings, namely one
at each end and one between the two annular cavities.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Patent Office on the 9th June 1884.
HERBERT JOHN HADDAN of the Firm of Herbert and Company, Solicitors of
" AN
Patents, of 67, Strand, in the City of Westminster, Civil Engineer,
IMPROVED PUMP," a communication to me from abroad by Alphonse Reis, of
Antwerp, in the kingdom of Belgium,
In describing the invention reference will be made to the annexed drawings in
which Fig. I is a longitudinal section and Fig. II a plan of a pump embodying the
invention.
The pump which may be placed horizontally or vertically, as desired, comprises
a ram piston A working in a cylinder B forming itself the piston of a second
cylinder C which is fixed; or, what is the same, C is a fixed cylinder through
which passes a piston cylinder moved to and fro and in the interior of which works
the ram piston A; the piston A, being equally moved to and fro, produces the
suction and discharge of fluid while the cylinder B serves as distributor only as
hereinafter described.
་
The fixed cylinder C comprises two principal parts C and C¹ carrying the
suction and discharge pipes H; these two parts forming the cylinder have three
stuffing boxes; as shown in the drawing, and between these stuffing boxes are
situated two annular cavities G G¹, one of which serves to admit and the other to
from
discharge the gases or liquids; these stuffing boxes prevent the cavities G, G¹,
communicating between each other or with the exterior.
The pistons A and B are set in motion by a rotating cam D keyed on the
shaft E; this cam carries a crank pin E and thus serves at the same time as a cam
and as a crank adapted to produce the two different motions necessary for the
pistons B and A. The cam D operates the distributing cylinder B by means of
two friction rollers g mounted on a frame I which is fixed to the cylinder and
carries a slide into which fits a boss D' cast in one piece with the cam.
The crank pin F is connected directly with the ram cylinder A by means of a
connecting rod.
The piston B is provided in the interior with a partition situated at the end of
the stroke of the piston A; near this partition or bottom and on the side of the
piston A, the piston B is perforated over the whole of its circumference with two
series of small holes t, the aggregate superficial area of which is equal to that of the
suction or discharge opening H. The cam D has for its object to place the
apertures t alternately opposite the suction and discharge openings G, G¹. The
shape and dimensions of the cam are so calculated that the crank actuates
the piston A at the proper moment, that is to say, when the apertures of the
piston B and cylinder Care face to face; these two combined motions therefore
produce the suction and discharge of the liquids and the gases without the
assistance of valves.
The principal causes of wear and tear and disturbance are therefore obviated by
this system, the friction surfaces being constantly kept in good order by the
stuffing boxes. The degree of tightness may be controlled by the stuffing boxes
according to the pressure of the discharge to be produced.
The combination of the motions and the shape of the cam permit to impart to
the pump a rotary motion in either direction and therefore to reverse the action of
the suction and discharge pipes at will. For this purpose it is sufficient to reverse
the pump in any suitable way by a set of pulleys and driving belts or in any other
suitable manner.

page_text: H. J. HADDAN (L.S.)