Improvements in Inlet Ventilators.
Year: 1888

page_text: Date of Application, 26th July, 1888
Complete Specification Left, 26th Apr., 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Inlet Ventilators.
We THOMAS GUEST NORMANTON of 41 Cheltenham Street Barrow in Furness
in the County of Lancaster Architect and Surveyor and SEYMOUR EDWARD MAJOR
of 5 Lawson Street Barrow in Furness aforesaid Gentleman do hereby declare the
nature of this invention to be as follows:-
Our Invention relates to Inlet Ventilators and consists of an air chamber or
pipe which may be fixed within the room or other place to be ventilated or may
be constructed in the external wall of the room itself (in this case the front of
the chamber would be flush with the internal surface of the wall.
This air chamber or pipe may be made in various forms and requires to com-
municate by a pipe or other means with the external air, the fresh air is
admitted to the room or place to be ventilated from this chamber by means of a
series of small countersunk trumpet-mouthed or wedge-shaped perforations with the
narrow slit (in the case of a wedge) or hole (in the case of a cone or trumpet
mouth) opening into the chamber or pipe and the widest part opening into the
room. The fresh air passing through a large number of these small expanding
orifices is diffused without draught.
The second part of our Invention relates to an improved form of protecting
cowl or inlet head for fixing on the downcast ventilating pipes of ships or other
inlet pipes fixed in exposed situations.
This cowl consists of an outer perforated cylinder or casing closed at the top
and having a bottom fixed within the perforated casing at about the level of the.
lowest row of perforations, a pipe made to fit upon the downcast shaft passes
through this bottom and is continued up within the perforated casing to a point
above the highest row of perforations. The combined area of the perforations
and also the area of the transverse section of the annular space should in each
case be not less than the sectional area of the down cast pipe. The perforations in
the cylinder or casing may be either plain holes or conical or other wedge shaped
openings or embossed perforations with the projecting parts within the cylinder.
This cowl is intended as a protector to prevent the admission of water to the down-
cast ventilating pipes where the air currents are produced by induction or mechanical
or other means. Although we prefer that this protecting cowl should be made as
described with plain perforations for ordinary inlets we find that where a powerful
induced current is produced by jets of steam, compressed air, or mechanical or other
means the outlet ventilating cowl Fig. 3 in our Patent number 7884-June 12th 1886
may be used as a protector.
The first part of our Invention is applicable to the ventilation of schools churches
chapels and public buildings rooms and apartments of dwelling houses and other
buildings, cabins, holds, or other compartments of ships, Railway and other carriages
Ship's Lamps, Carriage Lamps, and other lamps and Lanterns, and to other enclosed
air spaces requiring to be ventilated.
The countersunk, trumpet-mouthed, or wedge-shaped perforations are formed by
stamping, pressing, rolling, embossing (or other method of forming metal work in
relief) upon the inner surface of the inlet air chamber proviously described and project
within the chamber.
The small orifice or slit being formed in the apex of the conical or other form of
embossed projection within the chamber the air passing from the chamber into the
room to be ventilated through this orifice or slit is diffused through the expanding
hollow part of the projections without draught.
In applying these inlets to Lamps the air chamber may be formed in the bottom or

page_text: sides of the Lamp with the conical perforations within the chamber with the expanding
or hollow part thereof towards the Lamp.
These inlet air chambers may be made in a variety of forms to suit various
requirements and may be made of malleable metal or metallic alloy.
We do not claim that there is anything new in the use of expanding inlets but the
use of expanding inlets as above described and the formation of expanding inlet
openings by embossing upon malleable metal or metallic alloy we believe to be a novel
and useful improvement.*
Dated this Twenty fifth day of July 1888.
THOMAS GUEST NORMANTON.
SEYMOUR E. MAJOR.
COMPLETE SPECIFICATION.
Improvements in Inlet Ventilators.
We THOMAS GUEST NORMANTON of Barrow in Furness in the County of
Lancaster Architect, and SEYMOUR EDWARD MAJOR of Burrow in Furness afore-
said Gentleman 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 Inlet Ventilators and consists of an air chamber or pipe
which may be fixed within the Room or other place to be ventilated or may be con-
structed in the external wall of the Room itself (in this case the front of the chamber
would be flush with the internal surface of the wall.
This air chamber or pipe may be made in various form and requires to communi-
cate by a pipe or other means with the external air, the fresh air is admitted to the
Room or placo to be ventilated from this chamber by means of a series of small
countersunk, trumpet mouthed or wedge shaped perforations with the narrow slit (in
the case of a wedge) or hole (in the case of a trumpet mouth or cone) opening into
the chamber or pipe, and the widest part opening into the Room. The fresh air
passing through a large number of these small expanding orifices is diffused without
draught.
The second part of our invention relates to an improved form of protecting cowl, or
inlet head for fixing upon the downcast ventilating pipes of ships, or other inlet pipes
fixed in exposed situations. This cowl consists of an outer perforated cylinder or
casing closed at the top and having a bottom fixed within the perforated casing, at
about the level of the lowest row of perforations, a pipe made to fit upon the down-
cast shaft passes through this bottom and is continued up within the perforated casing
to a point above the highest row of perforations. The combined area of the perfora-
tions and also the area of the transverse section of the anular space should in each
case be not less than the sectional area of the downcast pipe. The perforations in the
cylinder or casing may be either plain holes or conical or other wedge shaped openings
or embossed perforations, with the projecting parts within the cylinder.
This cowl is intended as a protector to prevent the admission of water to the down-
cast ventilating pipes where the air currents are produced by induction or mechanical
or other means. Although we prefer that this protecting cowl should be made as
described with plain perforations for ordinary inlets, we find that where a powerful
induced current is produced by jets of steam, compressed air, or mechanical or other
means, the outlet ventilating cowl Fig. 3 in our Patent No. 7884 June 12th 1886
may be used as a protector.
The first part of our invention is applicable to the ventilation of schools, churches,
chapels, and public buildings, rooms, and apartments of dwelling houses and other
buildings, cabins, holds or other compartments of Ships, Railway and other Carriages,
Ships Lamps, Carriage Lamps, and other Lamps and lanterns, and to other enclosed
air spaces requiring to be ventilated.
The countersunk, trumpet mouthed or wedge shaped perforations, are formed by

page_text: stamping, pressing, rolling, embossing (or other method of forming metalwork in
relief) upon the inner surface of the inlet air chamber previously described and project
within the chamber.
The small orifice or slit being formed in the apex of the conical or other form of
embossed projection within the chamber, the air passing from the chamber into the
Room to be ventilated through this orifice or slit is diffused through the expanding
hollow part of the projections without draught.
In applying these inlets to lamps the air chamber may be formed in the bottom or
sides of the Lamp with the conical perforations within the chamber with the expanding
or hollow part thereof towards the Lamp. These inlet air chambers may be made in
a variety of forms to suit various requirements and may be made of malleable metal
or metallic alloy.
We do not claim that there is anything new in the use of expanding inlets but the
use of expanding inlets as above described and the formation of expanding inlet openings
by embossing upon malleable metal or metallic alloy we believe to be a novel and useful
improvement.
DESCRIPTION OF THE DRAWINGS.
Figs. 1 and 2 shew front and side Elevations of Tubular, semi-circular inlet air
chambers, for fixing within the Room perforated as described."
Figs. 3 and 4 shew elevation and section of a semicircular perforated inlet chamber
as described fixed horizontally.
Fig. 5 is an enlarged plan of Figs. 1 and 2 showing the conical perforations within
the chamber.
In Figs. 1. 2. 3 and 4 the letters " a "denote the conical perforations and b wedge
shaped slits.
Fig. 6 is a section of a Ships Lamp c being the air chamber having a pierced front b
for admitting the air to the chamber and " a shewing the conical openings into the
Lamp for admitting air without draught.
Fig. 7 shews the protecting inlet cowl for preventing water getting down the inlet
shafts a. a being the outer perforated casing and b the pipe standing up within same,
so that water penetrating the outer casing is discharged through the lower holes.
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 we
claim is
1st. The formation, or construction of conical, Trumpet mouthed, wedge shaped or
other expanding form of inlet openings upon the surface of an air chamber, by
stamping pressing, punching or other method of embossing metal work in relief, the
projecting parts being within the chamber and having an orifice or slit in the
apex of each with the wide end of the opening towards the Room or place to be
ventilated.
2nd. The application of these embossed inlet openings to various forms of
ventilating inlet apparatus and for supplying air to Lamps and Lanterns without
draught.
3rd. The construction of an Inlet protecting cowl for Inlet shafts of Ships and other
exposed situations as shewn on Drawing Fig. 7, having an outer perforated casing with
a covered top, and a bottom having a pipe standing up within the outer casing, above
the highest row of perforations.
Did thin 4th day of Anal 1000
T. G. NORMANTON.
SEYMOUR E. MAJOR.