Improvements in Vacuum or Syphon Appliances for the Discharge of Fluids, also applicable as Stench Traps.
Year: 1893

page_text: Date of Application, 15th Aug., 1893
Complete Specification Left, 13th Oct., 1893-Accepted, 25th Nov, 1893
PROVISIONAL SPECIFICATION.
Improvements in Vacuum or Syphon Appliances for the Discharge
of Fluids, also applicable as Stench Traps.
I, WILLIAM HAMILTON AITCHISON, of 3 Brunswick Place, Burnham, in the
County of Somerset, Civil Engineer, do hereby declare the nature of this invention
to be as follows :-
My invention refers to new or improved vacuum or syphon appliances as here-
after described for trapping and effecting the discharge of fluids, and also
applicable as stench traps or gas checks, the apparatus being submerged in a tank
or the like, and capable of being caused to act in an automatic manner or when
desired, and is silent and certain in its action, whereby a fluid may be raised above
its outlet by its own weight and sustained there at will.
"
According to my invention, I provide a vertical discharge pipe extending upwards
through the bottom of the tank, reservoir, flushing cistern, water-waste-preventer,
or whatever other receptacle the appliance is to be fitted to, hereafter termed tank.
The discharge pipe extends to a convenient height within the tank, and is some-
what bell-mouthed at its top terminal end, while the lower or discharge end is
below the base of the tank, and within the tank the said discharge pipe is
surrounded by a wall of the same height as the discharge pipe and fixed to the
bottom of the tank or formed in a piece with the discharge pipe, the base of the
interspace between the wall and the discharge pipe being rounded; the pipe and its
surrounding wall may be of any desired configuration in plan view, say for example,
circular. This being so, I provide what I may call a
66 cover composed of a
circular plate having an outer and an inner downwardly extending flange, the
top of the interspace between the two flanges and the circular plate being
rounded, and the outer flange being bell mouthed at its lower edge. This cover is
placed over the discharge pipe, the inner flange thereof passing between the wall
and the discharge pipe, while the outer flange passes around, and at a short distance
outside from, the said wall surrounding the discharge pipe. Passages which com-
municate are thus formed for water to pass upwards between the outer cover flange
and the wall (which I will call passage A), downwards between the wall and the inner
cover flange (passage B), and again upward between the exterior of the pipe and
interior of the inner flange (passage C).
The cover may be supported or suspended by an attachment at the top from a
lever, or by other suitable means.
When the fluid in the tank above the mouth of the discharge pipe is equal to
the depth of the passages B or C, the apparatus will remain inactive, until the
cover is lifted, when the water will flow freely through passages A B C and through
the discharge pipe, and the cover being returned to position, the fluid will continue
to flow until the tank is empty, when the tank can be filled again from the main
and checked by, say, a ball tap in the ordinary manner. The extent of rise and
fall of the cover may be as aforesaid regulated by the extent of motion allowed
to the lever by which it is raised.
As will be now understood, the motion of the cover is vertical, the flanges
thereof not touching the other parts, and therefore no friction is occasioned, and
no noise is produced.
If the appliance is used for automatically discharging the contents of a tank at
given periods, the water is allowed to flow in above the height previously specified,
when the passages become overcharged and bring the syphon into action. It will
be understood that when the appliance is inactive as at first described, it acts as a
perfect stench trap.

page_text: The weight of water in the passages BC will sustain a column of water, outside
or around the cover, equal to its own weight, but double its height. Hence the
vacuum is submerged, and when raised becomes a syphon; this being an important
factor in the success of such appliances.
I have described a simple and easily understood arrangement of my apparatus
by way of example, but I do not limit myself to the exact details of construction,
as such may be varied without departing from invention.
my
Apparatus constructed according to my invention is simple and perfect in action,
and cannot get out of order, having no working or wearing parts, and is applicable
for exhausting tanks, cisterns, and the like, of any given quantity of water or other
fluid when required, and may, all as aforesaid, effect the same automatically at
given periods, and may be applied for the purposes of stench traps for drains, sinks,
and the like, as well as to flush same when required or automatically.
1
1000
BREWER & SON,
London and Leeds, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Vacuum or Syphon Appliances for the Discharge
of Fluids, also applicable as Stench Traps.
I, WILLIAM HAMILTON AITCHISON, of 3 Brunswick Place, Burnham, in the
County of Somerset, Civil 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 refers to new or improved vacuum or syphon appliances as here-
after described for trapping and effecting the discharge of Huids, and also applicable
as stench traps or gas checks, the apparatus being submerged in a tank or the like,
and capable of being caused to act in an automatic manner or when desired, and is
silent and certain in its action, whereby a fluid may be raised above its outlet by its
own weight and sustained there at will.
My invention will be fully understood by the following description, having
reference to the accompanying sheet of drawings, whereon is illustrated by way of
example an apparatus constructed according to my said invention,
Fig. 1 being a vertical section shewing the apparatus when inactive, while
Fig. 2 shews by a similar view the same apparatus in action.
Similar letters of reference indicate like parts in the several figures.
According to my invention, I provide a vertical discharge pipe D extending
upwards through the bottom of the tank, reservoir, flushing cistern, water-waste-
preventer, or whatever other receptacle the appliance is to be fitted to, hereafter
terned tank E. The discharge pipe D extends to a convenient height within the
tank E, and is somewhat bell-mouthed at its top terminal end, while the lower or
discharge end is below the base of the tank. Within the tank, the said discharge
pipe D is surrounded by a wall 6 of the same height as the discharge pipe, and
fixed to the bottom of the tank E or formed in a piece with the discharge pipe D,
the base of the interspace between the wall band the discharge pipe D being
rounded; the pipe D and its surrounding wall & may be of any desired configuration
in plan view, say for example circular. This being so, I provide what I may call
a "cover" composed of a circular plate F having an outer flange a and an inner
downwardly extending flange c, the top of the interspace between the two flanges a c
and the circular plate F being rounded, and the outer flange a being bell-mouthed
at its lower edge. This cover is placed over the discharge pipe D, the inner
flange c thereof passing between the wall 6 and the discharge pipe D, while the
outer flange a passes around, and at a short distance outside, the said wall b
surrounding the discharge pipe D. Passages which communicate are thus formed
for water to pass upwards between the outer cover flange a and the wall b (which I

page_text: will call passage A) downwards between the wall b and the inner cover flange c
(passage B), and again upward between the interior of the inner flange c and the
exterior of the pipe D (passage C).
The cover may be supported or suspended, say by an attachment J at the top
from a lever G, or by other suitable means.
When the fluid in the tank E above the mouth of the discharge pipe D is equal
to the depth of the passages B or C, the apparatus will remain inactive, until the
cover F is lifted, when the water will flow freely through passages A B C and
through the discharge pipe D, and the cover F being returned to position, the fluid
will continue to flow until the tank E is empty, when the said tank E can be filled
again from the main and checked by, say, a ball tap H in the ordinary manner.
The extent of rise and fall of the cover F may be as aforesaid regulated, say by
the extent of motion allowed to the lever G by which it is raised.
As will be now understood, the motion of the cover F is vertical, the flanges
thereof not touching the other parts, and therefore no friction is occasioned, and
no noise is produced.
If the appliance is used for automatically discharging the contents of a tank at
given periods, the water is allowed to flow in above the height previously specified,
when the passages become overcharged and bring the syphon into action. It will
be understood that when the appliance is inactive as at first described, it acts as a
perfect stench trap.
The weight of water in the passages BC will sustain a column of water, outside
or around the cover, equal to its own weight, but double its height, this being an
important factor in the success of such appliances.
have described a simple and easily understood arrangement of my apparatus
by way of example, but I do not limit myself to the exact details of construction,
as such may be varied without departing from my invention.
Apparatus constructed according to my invention is simple and perfect in action,
and cannot get out of order, having no working or wearing parts, and is applicable
for exhausting tanks, cisterns, and the like, of any given quantity of water or other
fluid when required, and may, all as aforesaid, effect the same automatically at
given periods, and may be applied for the purposes of stench traps for drains, sinks,
and the like, as well as to flush same when required or automatically.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. In vacuum or syphon appliances for the discharge of fluids, also applicable as
stench traps, a discharge pipe surrounded by a wall fixed to the bottom of a cistern
or equivalent therefor, or formed in a piece with the discharge pipe, in combination
with a cover having outer and inner depending flanges, all arranged and acting
substantially as and for the purposes hereinbefore described.
2. The vacuum or syphon appliances for the discharge of fluids, also applicable
as stench traps or gas checks, composed of a discharge pipe and a surrounding wall,
with a cover consisting of a top plate and inner and outer depending flanges, the
whole apparatus being submerged in a tank, reservoir, flushing-cistern, water-waste-
preventer, or other receptacle, whereby a fluid may be raised above its outlet by its
own weight, and sustained there at will, all substantially as herein before described.
3. The general arrangement and combination of the several parts composing the
vacuum or syphon appliances for the discharge of fluids, also applicable as stench
traps or gas checks, all constructed and acting substantially as described and
illustrated in reference to the accompanying drawings.
Dated this 13th day of October 1893.
BREWER & SON,
London and Leeds, Agents for Applicant.