An Improved Disinfecting Air-inlet Ventilator for Drains.
Year: 1894

page_text: Date of Application, 28th June, 1894
Complete Specification Left, 28th Mar., 1395-Accepted, 28th June, 1895
PROVISIONAL SPECIFICATION.
An Improved Disinfecting Air-inlet Ventilator for Drains.
I, LETITIA DYER MILNES, married, of "The Lodge," Blofield, near Norwich,
in the County of Norfolk, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to disinfect and deodorize the foul air or gases in
drains, or to impregnate such foul air or gases with a pungent, odorous chemical
for the purpose of rendering it easy to detect and locate any escape from such
drains.
I effect this purpose by placing in the immediate vicinity of the "air-inlet
ventilator," through which air is admitted to the drains, a receptacle which
contains either solid or liquid disinfectant, deodorant, or pungent odorous chemical,
and I prefer to place this receptacle close to the air-inlet valve which freely admits
the air to the drain, but prevents the return of the foul air or gases from the drain.
The receptacle is so shaped and arranged in the down tube which leads to the
drain, and close to the valve, that the whole of the body of air entering the drain
must pass over or otherwise in close proximity to the material contained in the
receptacle, and so take up and become charged with the volatile particles of the
disinfectant, deodorant, or pungent, odorous chemical employed.
This, being carried into the drain, effectually disinfects deodorizes, or impregnates
and renders innocuous the contents of the drains as well as the foul air contained
therein, and, where a pungent, odorous chemical or drug is used, such as assafetida
or peppermint, it constitutes a permanent test as to the soundness of the drains and
the fittings in the house connected with the drains, as the presence of the
characteristic odour of the particular material employed, at or near any of such
internal fittings, would indicate not only a defect, but its approximate position.
I, in general, place the receptacle immediately behind the tale air-inlet valve
commonly employed at the head of the down-pipe leading to the drain; but, in
some cases, 1 so form the receptacle and the parts surrounding it, that the lifting
of a cover exposes a clear passage, whereby a jointed rod or plunger may be
introduced for the purpose of clearing the drain.
A perforated cake of solid disinfectant, deodorant, or pungent, odorous chemical
or drug may be employed and disposed in such a manner that the whole of the air
entering must necessarily pass through the perforations therein, thus ensuring
intimate contact between the air and the material employed.
Dated this 25th day of June 1894.
4444
I, LETITIA DYER MILNES, married, of "The Lodge " Blofield, near Norwich,
Norfolk, 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 :-
The object of my invention is to disinfect and deodorize the foul air or gases in

page_text: drains or to impregnate such foul air or gases with a pungent odorous chemical for
the purpose of rendering it easy to detect and locate any escape from such drains.
I effect such purpose by placing in the immediate vicinity of the air-inlet
ventilator through which air is admitted to the drains, a receptacle to contain
either solid or liquid disinfectant, deodorant, or pungent odorous chemical, and
I prefer to place this receptacle close to the air-inlet valve which is intended to
freely admit the air to the drain but to prevent the return of foul air or gases from
the drain. The said receptacle is so shaped and arranged in the down tube which
leads to the drain and close to the valve, that the whole of the body of air entering
the drain must pass over or otherwise in close proximity to the material contained
in the receptacle, and so take up and become charged with the volatile particles of
the disinfectant, deodorant, or pungent odorous chemical employed. This being
carried into the drain, tends effectually to disinfect, deodorize or impregnate or
render innocuous any foul air or gases contained therein and, where a sufficiently
pungent odorous chemical or drug is used, such as assafetida or peppermint, it
constitutes a permanent test as to the soundness of the drains and the fittings within
or without the house connected with the drains, as the presence of the characteristic
odour of the particular disinfecting material employed at or near any of such
fittings would indicate not only the existence of a defect but also its approximate
position.
I, in general place the receptacle for containing the disinfectant immediately
behind the tale or mica valve as commonly employed and fixed at the head of the
down tube leading to the drains as shown in (Fig. 1) in the accompanying drawing
in which (A.) is the receptacle or trough for containing the disinfectant and
(B.) is the talc or mica valve, with grating attached, in this case shown open but
intended in the usual course to remain shut and secured by means of a thumb screw
or otherwise.
In another pattern of this ventilator, I so form the receptacle and the parts
surrounding it that the lifting of a cover exposes a clear passage whereby a jointed
rod or plunger may be introduced for the purpose of clearing the drain or
intercepting trap beneath. This form is shown in (Fig. 2).
A perforated cake of solid disinfectant, deodorant, or pungent odorous chemical
may be employed and disposed in such manner that the whole of the air entering
the drains must necessarily pass through the perforations therein, thus ensuring
intimate contact between the air and the material employed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
1. A. combination of a valve with a trough or receptacle for containing a
disinfectant, substantially as described.
2. A combination of a valve, receptacle
and a down tube or pipe.
or
3. The use of a perforated cake of solid disinfecting material with either of
above.
1 1005
LETITIA DYER MILNES.