Improvements in Apparatus for Ventilating Railway and other Carriages.
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 8th Jan., 1896-Accepted, 8th Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Ventilating Railway and other
Carriages.
I, JOHN ANDERSON, of Burnbank House, Oban, in the County of Argyle,
North Britain, Railway Manager, do hereby declare the nature of this invention to
be as follows:-
This invention has reference to carriage ventilating apparatus of the kind in
which an induction tube is used in connection with a shell or casing shaped to form.
two air passages, the inner ends of which are adapted to be placed in connection
with the interior of the carriage to he ventilated, as described in the Specifications
of former Letters Patents granted to me Nos. 14,091 of 1887, 20 9 of 1890, and
20711 of 1890; and it is designed to lessen or prevent the liability that sometimes
obtains with such ventilators, as heretofore constructed, of dust entering the
carriage with the inflowing air.
For this purpose, I construct the ventilator with an induction tube that is
perforated at suitable parts of its length, and has outwardly flaring ends that are
made to fit the outer ends of the shell or casing enclosing it, the central portion of
the said tube being carried by a diaphragm or division that serves to divide the
interior of the shell or casing into two compartments, adapted to be placed in
communication by suitable openings with the interior of the carriage to be
ventilated. The arrangement is such that when in use, air will be caused to enter
the apparatus by the forward end only of the induction tube, a portion of such
air passing, through the front perforated portion of such tube into the front
chamber, and thence into the carriage, the remainder of the air passing onward
through the contracted portion of the tube, and thence into the rearwardly flaring.
end thereof where it will act to induce air to flow from the carriage through the
rearward chamber and rearwardly perforated portion of the tube, any dust that
may be in the entering air being, to a large extent, carried past the perforations in
the front end of the tube by its momentum, and thus separated from the portion
of air that passes through and thus has its direction of motion changed by such
perforations.
In an arrangement of ventilating apparatus according to my invention, the shell
or casing is of approximately D-form in cross-section provided on its inner side,
near its central portion, with two rectangular openings between which is secured a
transversely arranged box or hollow division, that serves to divide the casing into
front and rear chambers, and to carry the contracted central portion of the
induction tube, the oppositely flaring ends of the said tube, which is flattened at
the sides, being perforated for a part of its length at each side of the central
division, and terminating in contact with the ends of the shell or casing.
Ventilators of the kiud herein referred to as heretofore constructed may be
adapted for the purposes of my invention by providing their induction tubes or
passages with perforated flaring extensions, the outer ends of which are made to
fit the shell or casing containing them.
Dated this 12th der of Anril 1895
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.

page_text: Improvements in Apparatus for Ventilating Railway and other
Carriages.
I, JOHN ANDERSON, of Burnbank House, Oban, in the County of Argyle,
North Britain, Railway Manager, 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 :-
This invention has reference to carriage ventilating apparatus of the kind in
which an induction tube is used in connection with a shell or casing shaped to
form two air passages, the inner ends of which are, adapted to be placed in
connection with the interior of the carriage to be ventilated, as described in the
Specifications of former Letters Patents granted to me Nos. 14,091 of 1887;
2009 of 1890 and 20711 of 1890; and it is designed to lessen or prevent the
liability that sometimes obtains with such ventilators, as heretofore constructed, of
dust entering the carriage with the inflowing air.
For this purpose, I construct the ventilator with an induction tube that is
perforated at suitable parts of its length, and has outwardly flaring ends that are
made to fit the outer ends of the shell or casing enclosing them, the central portion
of the said tube being carried by a diaphragm or division that serves to divide the
interior of the shell or casing into two compartments that are adapted to be placed
in communication, by suitable openings, with the interior of the carriage to be
ventilated. The arrangement is such that when in use, air will be caused to enter
the apparatus by the forward end only, for the time being, of the induction tube,
a portion of such air passing through the front perforated portion of such tube into
the front chamber, and thence into the carriage, the remainder of the air passing
onward through the contracted portion of the tube, and thence into the rearwardly
flaring end thereof where it will act to induce air to flow from the carriage
through the rearward chamber and rearwardly perforated portion of the tube, any
dust that may be in the entering air being, to a large extent, carried past the
perforations in the front end of the tube by its momentum, and thus separated
from the portion of air that passes through and thus has its direction of motion
changed by such perforations.
In the accompanying drawings,
Fig. 1 is an elevation of the inner side, Fig. 2 a central horizontal section,
and Fig. 3 an end view, of a ventilating apparatus constructed according to this
invention.
I is the shell or casing of the apparatus, made of approximately D-form in
cross-section and provided on its inuer side, near its central portion, with two
rectangular openings 2 and 3 between which is secured a transversely arranged
box or hollow division 4 that serves to divide the casing, into front and rear
chambers 5 and 6 respectively, and to carry the contracted central portion 7 of
the induction tube. 7 and 7b are the oppositely flaring ends of the said tube,
which is flattened at the sides as shown, the said ends being perforated for a part
of their length at each side of the central division 4 and terminating in contact
with the ends of the shell or casing 1. In the example shown, the shell or casing
is made in two parts of which the inner is a plate, having the openings 2 and 3
formed therein, and the outer is a flanged and dished plate secured to the other.
In this case the spaces left between the ends of the induction tube and of the two
parts of the shell or casing at the points 8 (Fig. 3) are suitably closed, as for
instance by pieces of sheet metal. The arrows a, in Fig. 2, represent the directions
of the air currents in the ventilator when the latter moves rapidly in the direction
of the arrow a¹; the direction of these currents is of course reversed when the
ventilator moves in the direction of the arrow b.

page_text: Ventilators of the kind herein referred to, as heretofore constructed, may be
adapted for the purposes of my invention by providing their induction tubes or
passages with perforated flaring extensions, the outer ends of which are made to fit
the shell or casing containing them.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. A ventilator of the kind herein referred to constructed with an induction
tube or passage that is perforated at suitable parts of its length and has
outwardly flaring ends or extensions made to fit the outer ends of the shell or
casing containing them, substantially as herein described for the purpose
specified.
2. My improved ventilator constructed substantially as described and shown.
Dated this 8th day of January 1896.
Dated this 8th day of January 1896.
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.