IMPROVEMENTS IN THE CONSTRUCTION OF AERATED WATER PUMPS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I FREDERICK FOSTER of Niagara Works 26 Eagle Wharf Rd Hoxton in the
County of Middlesex Engineer do hereby declare the nature of my invention
for IMPROVEMENTS IN THE CONSTRUCTION OF AERATED WATER PUMPS to be as
follows:-
=
This invention relates to a means of stopping the action of a soda water pump
by opening a passage communicating with the atmosphere from the interior of the
valve chamber so as to prevent the operation of the valves. Hitherto in the case
of two pumps upon one frame it has been usual to work with one pump when the
output of both is not required and to stop the action of the other by simply
shutting off the gas and water cocks which supply the inlet to the pump. For
pumps of small size this means is practically effectual but with large pumps such
as those with plungers of 21/2 in diameter and upwards air enters the pump barrel
on the down stroke of the plunger by passing through the bydraulic cup leather
and air is thus forced into the condenser on the up stroke of the plunger. To
avoid the possibility of mingling air with aërated waters in this way I fit the
valve chamber of an aërated water pump with a jamb screw as shewn in the
accompanying drawing at D by means of which a passage C from within the valve
chamber communicating with the atmosphere may be closed or opened for the
purpose of preventing the operation of the valves when it is required to stop the
working of the pump. A represents a portion of a pump barrel with plunger B.

page_text: COMPLETE SPECIFICATION.
I FREDERICK FOSTER of Niagara Works 26 Eagle Wharf Road Hoxton in the
County of Middlesex Engineer, do hereby declare the nature of my invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF AERATED WATER PUMPS and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
This invention relates to a means of stopping the action of a soda water pump
by opening a passage communicating with the atmosphere from the interior of the
valve chamber so as to prevent the operation of the valves.
Hitherto in the case of two pumps upon one frame it has been usual when
required to work with one pump (when the output of both is not required) to stop
the action of the other by simply shutting off the gas and water cocks which
supply the inlet to the pump For pumps of small size this means is practically
effectual; but with large pumps such as those with plungers of 21 inches
diameter and upwards air enters the pump barrel on the down stroke of the
plunger by passing through the hydraulic cup leather and air is thus forced into
the condenser on the up stroke of the plunger. To avoid the possibility of
mingling air with aërated waters in this way, I fit the valve chamber of an aërated
water pump with a jamb screw as shewn in the drawing (accompanying my
provisional specification) at D by means of which a passage C from within the
valve chamber communicating with the atmosphere may be closed or opened for
the purpose of preventing the operation of the valves when it is required to stop
the working of the pump. A represents a portion of a pump barrel with plunger B.
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
The manufacture of pumps for liquid aërating machines fitted with jamb screws
for the purpose of starting and stopping the pump substantially as described.