IMPROVED APPARATUS FOR PUMPING OR FORCING WATER, AIR, GAS, OR OTHER LIQUIDS OR FLUIDS
Year: 1874

page_text: LETTERS PATENT to Harry Whiteside Cook, of Thurloe Square,
Brompton, in the County of Middlesex, Gentleman, for the Inven-
tion of "IMPROVED APPARATUS FOR PUMPING OR FORCING WATER, AIR, GAS,
OR OTHER LIQUIDS OR FLUIDS."
Sealed the 4th September 1874, and dated the 7th March 1874.
PROVISIONAL SPECIFICATION left by the said Harry Whiteside Cook
at the Office of the Commissioners of Patents, with his Petition,
on the 7th March 1874.
I, HARRY WHITESIDE COOK, of Thurloe Square, Brompton, in the
County of Middlesex, Gentleman, do hereby declare the nature of the
said Invention for "IMPROVED APPARATUS FOR PUMPING OR FORCING WATER,
AIR, GAS, OR OTHER LIQUIDS OR FLUIDS," to be as follows:-
My improved apparatus for pumping or forcing water, air, gas, or
other liquids or fluids is constructed on the rotary principle, that is, the
pistons which draw in or force forward the liquid or fluid are made to

page_text: rotate round a central axis instead of having a reciprocating motion as
in ordinary pumps.
In my improved apparatus I have two movable rotating pistons
mounted on separate shafts, but rotating round the same axis and acting
independent of each other. To each of these pistons an alternate fast
and slow motion is communicated by external gearing, which is so
proportioned and arranged that while one piston is passing rapidly
round, say "ths of the circle the other piston is either at rest or is
slowly passing over the other 12th part of the circle, when it will arrive
at the point at which it will in its turn commence its rapid progress,
while the other one has slackened its pace until in its turn it again
arrives at the point from which it will again start at the quick speed,
and so on, each piston having alternately a fast and a slow motion.
This alternation of speed may be produced by means of excentric
gcaring mounted on the axles of the two pistons outside the cylinder.
Or instead of excentrics two semi-toothed wheels may be mounted on
the driving shaft and made to actuate alternately a pair of ordinary
toothed wheels which are mounted on the shafts which carry the pistons
and are kept rotating at an uniform speed. Any other arrangement of
gearing may however be adopted for giving the requisite alternate fast
and slow motions to the pistons, the novelty of the Invention consisting
in imparting an alternate fast and slow motion to two pistons which
rotate round the same axis, the particular kind of gearing whereby
the desired motions are given being a matter of comparatively little
importance.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Harry Whiteside Cook in the Great Seal Patent
Office on the 7th September 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HARRY
WHITESIDE COOK, of Thurloe Square, Brompton, in the County of 3
Middlesex, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of March, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-

page_text: seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Harry Whiteside Cook, Her special
licence, that I, the said Harry Whiteside Cook, my executors, admini-
strators, and assigns, or such others as I, the said Harry Whiteside
Cook, my executors, administrators, and assigns, should at any time
agree with and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVED APPARATUS FOR PUMPING OR FORCING WATER, AIR, Gas, OR OTHER
LIQUIDS OR FLUIDS," upon the condition (amongst others) that I, the said
Harry Whiteside Cook, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and scals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same
to be filed in the Great Seal Patent Offico within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Harry Whiteside Cook, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement, reference being had to the Drawing
hereunto annexed and to the letters and figures marked thereon (that is
to say) :-
My improved apparatus for pumping or forcing water, air, gas, or
other liquids or fluids is constructed on the rotary principle, that is, the
pistons which draw in or force forward the liquid or fluid are made to
rotate round a central axis instead of having a reciprocating motion as
in ordinary pumps.
In the accompanying Drawings I have shown various views of my
improved apparatus, Fig. 1 being a side clevation; Fig. 2, a transverse
vertical section; and Fig. 3, an end clevation of the pump, in which two
moveable rotating pistons a and b are mounted separately, but are made
to rotate round the same axis and to act independently of each other.
The piston a is mounted on or made fast to a driving shaft 8, while the
piston is secured at each end to two sleeves or collars which may in
fact form bearings for the central shaft s. To each of these pistons, a
and b, an alternate motion is communicated by external gearing, which

page_text: is so proportioned and arranged that while one piston is passing rapidly
round, say eleven-twelfths of the circle, the other piston is either at rest
or is only passing over the other twelfth part of the circle, when it will
arrive at the point at which it will in its turn commence its rapid
progress, while the other one has slackened its pace until in its turn it
again arrives at the point from which it will again start at the quick
speed and so on, cach piston having alternately a long and short
motion. This alternation of speed may be produced by means of
excentric gearing mounted on the axles of the two pistons outside the
cylinder. Or instead of excentrics two semi-toothed wheels c, d, may
be mounted, as shewn at Figures 1 and 3, on the driving shaft, and
made to actuate alternately a pair of ordinary toothed wheels or
pinions a, b, which are mounted on the shafts which carry the
pistons a and b, and are thus rotated alternately at an uniform speed.
-
In order to hold one of the pistons firmly while the other is in action
a block a² or b³, Fig. 3, on the side of the respective pinions comes
against à catch of one of the levers 9, 9', Figures 2 and 3, and is firmly
held until it is released by the cam / acting against the tail of the catch
lever and thereby throwing back the catch. Each of the pistons a and b
is alternately held stationary in this manner while the other piston is
forcing the water before it. Any other arrangement. of gearing may
however be adopted for giving the requisite alternate motions to the
pistons, the particular kind of gearing whereby the desired motions are
given being a matter of comparatively little importance.
In Fig. 2 e is the inlet pipe and f the outlet pipe. In this Figure the
piston a which was stationary is represented as advancing in the
direction of the arrow towards the inlet pipe e, the other piston 6 having
all but completed its rapid course. By the time this piston 6 will have
passed the outlet pipe f the piston a will have passed the inlet pipe to
the position indicated by dots and will have commenced its rapid course,
whereby it will draw in after it the water or other fluid from the pipe e,
and will drive before it the water that has been drawn into the cylinder
by the other piston. As considerable pressure will be brought to bear
on the water or other fluid that the piston drives before it to the exit
pipe such water or fluid may be forced up a considerable height.
Having now described my Invention of improved apparatus for
pumping or forcing water, air, gas, or other liquids or fluids, and having

page_text: explained the manner of carrying the same into effect, I claim as the
Invention secured to me by Letters Patent, as aforesaid, constructing
rotary pumps provided with two pistons which rotate round the same
axis, and to which an alternate motion is imparted, as and for the
Ipurpose herein set forth.
explained the manner of carrying the same into effect, I claim as the
Invention secured to me by Letters Patent, as aforesaid, constructing
rotary pumps provided with two pistons which rotate round the same
axis, and to which an alternate motion is imparted, as and for the
purpose herein set forth.
In witness whereof, I, the said Harry Whiteside Cook, have here-
unto set my hand and seal, the Seventh day of September, in
of our Lord One thousand eight hundred and seventy-
the
four.
year