of and Means for Automatically Raising Sewage.
Year: 1887

page_text: Date of Application, 24th Feb., 1887.
Specification Accepted, 19th Apr., 1887.
COMPLETE SPECIFICATION.
Method of and Means for Automatically Raising Sewage.
I, HENRY DAVEY, of Headingley, Leeds, in the County of York, 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 following
statement:—
My invention consists of means by which Sewage may be raised automatically in
different districts, the motive power being exerted at the Main Pumping Station.
From the Main Pumping Station I carry pipes to the various points where the Sewage
has to be raised from a lower to a higher level. At the pumping station I provide an
engine and air pump or other suitable device for exhausting the air from the said
pipes. At each of the places where the sewage has to be raised I provide an apparatus
such as that illustrated on the drawing. Fig. 1 is a general arrangement and Fig. 2
a detail of the air valve mechanism. a is the pipe leading to the main station, & is the
sewer from which sewage has to be elevated into the sewer c, d is a vessel having a
suction pipe e, leading to the level of the sewer b, f is an opening in the said vessel for
the purpose of putting the vessel d in communication with the pipe a through the
slide valve 9: and the port h. are valves. k is a float. m is a piston moving in a
cylinder and connected with the slide valve g. The centre port n of the cylinder
communicates with the pipe a, through a smaller pipe o. The float fits loosely on
a rod which is connected by means of a bell crank lever to the slide valve p.
valve is kept open by means of a float r. The action of the apparatus is as
follows:-The engine at the main station exhausts the pipe a, and assuming the vessel d
to be empty, the float k, hanging on its rod, pulls the valve p into its forward
position, placing the front port of the cylinder containing the piston m in communica-
tion with the exhausted pipe a, and the back port in communication with the
atmosphere. The atmospheric pressure then pushes the valve gi the direction of the
arrow and establishes communication between the vessel d and the pipe a. The vessel
The

page_text: d then becomes exhausted, and the sewage rises' in the suction pipe e until the float k
strikes the collar on the upper part of the rod and reverses the position of the valve p.
The back part of the piston m being now placed in communication with the pipe a,
and the front part with the atmosphere, the slide valve g is pulled over into the
position which opens communication between the vessel d and the atmosphere. The
sewage in the vessel d then falls of its own gravity through the valve i into the sewer c,
and the operation above described is repeated, until the level of the sewage in the
sewer is reduced so low as to allow the float to fall and thereby close the valve i¹¹.
The apparatus then remains inactive until the level of the sewago in the sewer brises
sufficiently high to raise the float r and its valve i, thereby putting the apparatus again
into operation. With this apparatus the exhausting pumps at the main station may
be kept constantly going (notwithstanding the intermittent action of the above
described apparatus) without material loss of power, because the work performed in
exhausting the pipe a will vary with the quantity of air delivered into it through the
said apparatus, and as there is no air passing through the apparatus except when it is
at work, there is little or no power spent at that time by the exhausting pumps at the
main station.
Having now described the nature of my invention, what I claim is,
Raising sewage automatically by means of an apparatus substantially as described