Improvements in Smoke-testing and Fumigating Apparatus.
Year: 1888

page_text: COMPLETE SPECIFICATION.
Improvements in Smoke-testing and Fumigating Apparatus.
We PETER FYFE, Sanitary Inspector, 1 Montrose Street Glasgow and JAMES DOBSON,
1 Montrose Street, Glasgow, (Assistant Sanitary Inspector) 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 :-
Our Invention relates to improvements in apparatus for the testing and disinfection
of drains, Sewers, and such like conduits, also for the fumigation of conservatories,
Hot-houses &c. whereby such apparatus can be wrought independently of an attendant,
as it is automatic in its action and has no working parts.
The Improved Apparatus, having reference to the subjoined Figures, consists
(Fig. I.) of an outer casing A. A¹ the casing A. being divided into compartments B.
and C. by the diaphragm D.
.
Within the compartment B. B. there is fitted a loose pan E. in the shape of a
truncated cone.
It is perforated with small holes all round its periphery, and is kept in position by
eight small projecting studs N. When the pan E. is in its place an annular
passage H. H. is formed between it and the casing A. This passage communicates
with the chamber F. F. in the lower casing A through the four openings or
ports O. O.
K. is a lid fitted into the top of the casing A. having a circular
opening L. in the centre, and attached to K. there is a conical deflector M. which
has a small hole at its apex. This deflector forms, along with the lid, the annular
passage P. P.
C. is a chamber at the bottom of the casing A. for the reception of water, steam,
gas or other agent under pressure.
It has a branch tube R. attached to it for connecting it by hose or otherwise to the
source of supply. V. is a minutely perforated rose piece screwed into the bottom of
the chamber C.
Fig. II. is a sectional plan of Fig. I taken through a. b.
A modification of the machine is shown at Fig. IV. by which the casing A. and
the casing A' are attached to one another by the swivel joint T. T. which enables

page_text: each to assume a position independent of the other and facilitates, in certain circum-
stances, the working of the apparatus.
A modification of the chamber C is also shown at Fig. III and particularly at
Fig. IV. It consists of substituting a minuto annular space all round the outlet at
the bottom, between the inside periphery of the chamber C. and the outside periphery
of the adjustable valve X, for the fixed rose piece shown in Fig. I.
The following is the manner in which the apparatus works. A hose pipe having
been attached to the nearest water tap or other source of pressure, the loose end is
fixed to the end of the tube R. of the apparatus and on the water, steam or other agent
being admitted to the chamber C. a fine spray or cylindrical sheet of it is ejected into
and fills up the space above the exit nozzle S. thereby producing a partial vacuum in
the annular spaces P. B. F.
Air is thus drawn down through the opening L. in the lid K. into the annular
spaces P. P and H. H. and out through the ports O. O. into F. F. from which it is
ejected along with the water, steam, gas, or other agent, and the smoke generated
from the burning material contained in the pan E, under considerable pressure, and
with velocity, into the drains, sewers, conservatories, hothouses, or elsewhere.
Having now particularly described and ascertained, the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what
wo claim is,
(1st.) The combination of parts constituting the new smoke-testing and fumigating
apparatus herein before described.
(2nd.) In a smoke-testing and fumigating apparatus, the utilization of a water,
steam, or other, spray, or jet, to induce a current of air by which smoke or other
vapour is conveyed and ejected under pressure into drains or elsewhere.
Dated this 30th day of October 1888
PETER FYFE.
JAMES DOBSON.