Improvements in Ventilators Applicable for Railway Carriages and other Vehicles.
Year: 1889

page_text: Date of Application, 18th Oct., 1889
Complete Specification Left, 14th Apr., 1890-Accepted, 17th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Ventilators Applicable for Railway Carriages and
other Vehicles.
We, ARNOLD WILLIAM JAMES SWINDELLS, of Slade Grove, Slade Lane, Longsight,
Manchester, in the County of Lancaster, Warehouseman, WILLIAM SYDNEY PEEL,
of Nelson Street, Oxford Road, Manchester, aforesaid, Traveller, and GEORGE
FREDERICK FREEMAN, of Princess Street, Manchester, aforesaid, Metal Merchant,
do hereby declare the nature of this invention to be as follows:-
This invention is designed chiefly for railway carriages with the object of providing
for the exhaustion of the foul or vitiated air.
It consists essentially in constructing the ventilator with an inlet apparatus
reduced to small sectional area at the inner end through which a strong current of
air is impelled by the motion of the vehicle and an outlet apparatus into which the
impelled current is blown causing an outlet current into which the foul or vitiated
air is withdrawn and expelled.
In carrying out the invention we construct the inlet part of the apparatus of
an inlet pipe with double flaring ends or trumpet head facing in opposite directions
the pipe tapering gradually to the other end at the same time turning round with
a U curve. The double trumpet head forms a T. In the centre of the double
trumpet head is pivoted a flap or vane which falls over to one side as the current
of air enters from the other and directs the current through the inlet pipe. The
outlet part of the apparatus is formed of any convenient form rectangular
cylindrical or otherwise with a flap on each side which closes when the pressure of
the wind comes against it, and with a downward projecting mouth which is placed
over or above the contracted nozzle of the inlet pipe.
The two parts of the ventilator will be placed preferably on the roof of the
carriage with their openings in the direction of its movement and as the force or
pressure of the wind comes against them the flap or vane in the inlet part directs a
strong inward current through it while the flap or cover on the outlet portion at the
front is closed down and that at the back opened allowing a free outlet passage for
the air. The current forced in through the inlet pipe issues through the small
nozzle through the mouth of the outlet part and causing a current therethrough
acts on the principle of an injector to carry with it a large volume of the vitiated
air from the compartment.
Dated this 17th day of October 1080
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE
SPECIFICATION.
Improvements in Ventilators Applicable for Railway Carriages and
other Vehicles.
We, ARNOLD WILLIAM JAMES SWINDELLS, of Slade Grove, Slade Lane, Longsight,
Manchester. in the County of Lancaster, Warehouseman, WILLIAM SYDNEY PEEL,
of Nelson Street, Oxford Road, Manchester, aforesaid, Traveller, and GEORGE
FREDERICK FREEMAN, of Princess Street, Manchester, aforesaid, Metal Merchant,
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 this invention is to provide a ventilator for moving vehicles whereby

page_text: Fig. 7, perspective view with side removed.
The apparatus is constructed with a metallic or other casing A, and is divided
into two parts or compartments, one forming an inlet through which a current of air
is impelled as the vehicle moves, and the other an outlet into which the air is injected
by a curved tapering passage or pipe C.
The inlet part of the apparatus is constructed with a double head or air passage B-
preferably with flaring ends or trumpet mouths gradually converging to the centre-
terminating in or opening into a curved or bent tube or air passage C. The
air tube or passage projects inwards from the head or passage B and is curved or
bent until the inner orifice c faces in the same direction as its outer orifice b and
opens opposite the centre of the outlet part of the apparatus. The curved air tube
or passage C, tapers or gradually contracts throughout its length from the orifice b
to the orifice c, in order to increase the velocity of the current of air passing through
it. The double head or air passage B, is provided in the centre with a hinged flap
or valve D, which directs the current of air entering the head or passage B, at either
end, into the tube or passage C, so although the head or air passage B is open at
both ends there is no current through it from end to end, but all the air that enters
the passage B issues from the inner contracted orifice c of the curved air tube C.
The pieces d, d', provide a seating at either side of the orifice 6 of the tube C for the
flap valve D. The flap valve D is pivoted at d¹¹ and is preferably made with a
counter-weight D' at the top, which holds or retains it against the seating at either
side until reversed by the reverse movement of the vehicle. We prefer to make the
head or passage B, inclined inward from each end as shown; though if desired it may
be made quite, straight.
The outlet part of the apparatus is constructed with a chamber E, provided with an
opening E at each end. The openings E¹ are each covered with a flap valve or
door F, hinged to the outside so as to close by the pressure of the air, caused by the
movement of the vehicle, against it. The mouth of the chamber E, is placed over
the contracted orifice c of the air passage C, so that the current of air passes direct
from the inlet to the outlet part of the apparatus, at the same time inducing an out-
ward current from the other parts of the interior of the compartment.
If desired, a movable flap door may be hinged or pivoted in the chamber E to
direct the outer current of air to the open flap door F, which would be; moved first,
to one side and then to the other as one or other of the flap doors F were opened or
closed.
'
The apparatus as shown in the drawings is designed to be fitted to the roof of the
carriage by, however, making it somewhat longer and of less depth it may, be
constructed so as to be applied to the sides or doors of railway carriages where the
present ventilator is usually situated.

page_text: The opening in the carriage roof or door leading to the ventilator may be covered
with a sliding or rotating shutter by means of which the ventilator can be opened or
closed as desired.
In operation the ventilator is attached to the carriage with its longitudinal axis in
the direction of movement. As the vehicle moves forward and the force or pressure
of the wind comes against the ventilator, a current of air is impelled or forced through
the air passage B, and injection tube C, issuing from the contracted orifice c of the
latter with considerable force and velocity. The current of air issuing from the
contracted orifice of the air tube C, rushes up into the chamber E and out through
one of the openings E¹, at the same time inducing such a current from the interior
of the carriage as to force out and carry with it a large volume of the foul or
vitiated air.
The small arrows show the direction of the currents of air and the large arrow the
direction of movement of the vehicle.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. An exhaust ventilator for railway carriages and other vehicles, having a double
headed inlet air passage, with a curved or bent contracted injection tube or passage
leading therefrom into the interior, through which a current of air is impelled or
injected by the movement of the vehicle, and an outlet compartment with side outlets,
protected or closed by flap valves, into which the air issuing from the injection tube
is forced, inducing a current which carries away the foul or vitiated air substantially
as described.
2. An exhaust ventilator for railway carriages and other vehicles, having an inlet
compartment through which a current of air is impelled into the interior, by the
movement of the vehicle in either direction, an outlet compartment with a downward
projecting mouth, and outlets controlled by flaps, and a curved or bent contracted
injection tube with its two orifices facing in the same direction, which conducts
the air into the interior and from which it issues in the direction of the outlet,
inducing a current which carries away the foul or vitiated air substantially as
described.
3. An exhaust ventilator for railway and other carriages, having a contracted
injection tube, curved or bent to U-shape, connected to a trumpet head or other inlet
device at one end and opening upward or in the direction of the outlet at the other,
substantially as described and shown.
4. An exhaust ventilator for railway and other carriages with the several parts
constructed and arranged substantially as described and shown.
Dated thie 8th day of Anril 1890
Dated this 8th day of April 1890.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.