DRAWING AND FORCING PUMP to be as follows:
Year: 1884

page_text: I, JOHN IMRAY of N° 28 Southampton Buildings, Chancery Lane in the County
of Middlesex, Consulting Engineer and Patent Agent do hereby declare the nature
of the said invention for "DRAWING AND FORCING PUMP to be as follows:-
"
According to this invention, part of a pipe for conveying liquid is widened out,
and in the widened part is mounted a transverse shaft having two opposite cranka.
These cranks are connected by links extending in opposite directions to bucket
pistons, that is to say pistons having passages through them fitted with valves,
which in both pistons open in the same direction. The crank shaft passes through
a stuffing box to the exterior and has fixed on it a toothed wheel gearing with and
driven by another wheel on a parallel countershaft which is driven by a pulley
and band or otherwise. The two toothed wheels, which have the same number of
teeth, are not circular, but the one which drives has its periphery elongated in two
opposite directions, and the other which is driven has its periphery hollowed to a
corresponding extent on two opposite sides, the sum of the two radii being alwaya
constant; and thus, while the countershaft revolves at uniform speed, the crank
shaft is made to revolve more rapidly in two parts of its revolution and more
slowly in two other parts. The two bucket pistons, being by the revolution of the
opposite cranks made alternately to approach towards and to recede from each
other, draw and force the liquid along the pipe, and by properly arranging the
curvature of the toothed wheels relatively to the crank throws, the flow of the
liquid can be made approximately uniform in velocity.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C

page_text: COMITE
DIEVIFICATION.
"
I, JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County
of Middlesex, Consulting Engineer and Patent Agent do hereby declare the nature
of my invention for "DRAWING AND FORCING PUMP' and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:―
According to this invention, part of a pipe for conveying liquid is widened out,
and in the widened part is mounted a transverse shaft having two opposite cranks.
These cranks are connected by links extending in opposite directions to bucket
pistons, that is to say pistons having passages through them fitted with valves,
which in both pistons open in the same direction. The crank shaft passes through
a stuffing box to the exterior and has fixed on it a toothed wheel gearing with and
driven by another wheel on a parallel countershaft which is driven by a pulley
and band or otherwise. The two toothed wheels which have the same number of
teeth, are not circular, but the one which drives has its periphery elongated in two
opposite directions, and the other which is driven has its periphery hollowed to a
corresponding.extent on two opposite sides, the sum of the two radii being always
constant ; and thus while the countershaft revolves at uniform speed, the crank
shaft is made to revolve more rapidly in two parts of its revolution and more
slowly in two other parts. The two bucket pistons being by the revolution of the
opposite cranks made alternately to approach towards and to recede from each
other, draw and force the liquid along the pipe, and by properly arranging the
curvature of the toothed wheels relatively to the crank throws, the flow of the
liquid can be made approximately uniform in velocity.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 of the accompanying Drawings shows a vertical section of one arrangement
of the before described improved pump; Fig. 2 shews a part elevation and part
vertical section at right angles to that shewn at Fig. 1. The two bucket pistons
S S¹ are connected by rods C C to opposite cranks on the shaft D which passes
transversely through the pump barrel W, the cranks and rods being formed with
the peculiar curvature shewn in Fig. 2, so as to bring both crank pins T T in the
axial line of the pump barrel, and the ends of the rods in line with the centres of
the bucket pistons.
3
j
ر
In order to obtain approximately a uniform speed for the pistons, and conse-
quently for the liquid, the requisite irregular rotary motion is imparted to the
crank shaft D from the driving pulley P through the peculiarly shaped toothed
wheels. p, the sum of the two radii of these being always constant, while the
curvatures are such as to make the cranks revolve more slowly when moving in
the longitudinal direction than when moving in the transverse direction.
Fig. 3 shews a modification in which the crank shaft is so formed that the con-
necting rods OC, which are straight in this case, and the bucket pistons do not
lie in one and the same axial line.

page_text: In the modification shewn at Fig. 4 the shaft D is formed with three cranks, the
two outer ones being connected by two rods C C to the one bucket piston, while
the middle crank, which is diametrically opposite the other two, is connected to the
other piston.
In the arrangement at Fig. 5 a uniform speed is imparted to the pistons by
means of two racks B, situated side by side and gearing with two toothed wheels H
on the driving shaft D, the wheels having teeth only upon opposite halves of their
circumference, so that during one half rotation of the shaft, the one wheel imparts
a longitudinal motion in one direction to the one rack and piston, while during
the other half rotation the other wheel imparts motion to the other rack in the
contrary direction. The two racks have also teeth formed on their sides facing
each other with which gears a pinion J, so that the motion imparted to the one
rack is imparted through the pinion J to the other rack in the contrary direction.
Fig. 6 shews a cross section of a modified form of the pump barrel, which in this
case is rectangular instead of cylindrical. The side M of of the barrel opposite the
side N on which the driving pulleys are situated is made removeable so as to gain
access to the interior; this side may in some cases be made of glass so as to observe
the action of the pump.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The construction of pump wherein a shaft passing transversely through the
pump barrel is made to impart motion simultaneously in contrary directions to
two bucket pistons, substantially as herein described, with reference to Figs 1, 2,
3, 4 and 5 of the Drawings.
2. For imparting a uniform motion to the two bucket pistons S S¹ by means of
the opposite cranks of a crank shaft D, the use of peculiarly shaped toothed wheels
such as p p arranged and operating as herein described with reference to Figs. 1
and 2 of the drawings.
3. The arrangement of mechanism herein described with reference to Fig. 5 for
imparting a uniform reciprocating motion in opposite directions to the pump
buckets from the shaft D revolving with uniform speed.
4. Constructing the pump casing as herein described with reference to Fig. 6 of
the drawings whereby access is gained to the interior without disturbing the
working parts.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.