Improvements in Ventilators.
Year: 1893

page_text: Date of Application, 12th May, 1893
Complete Specification Left, 10th Feb., 1894-Accepted, 10th Mar., 1894
Improvements in Ventilators.
HENRY THOMAS JOHNSON St. Andrew's Chambers Albert Square Manchester
Ventilating Engineer do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to improve the means of supplying or withdrawing
air in ventilating a building by constructing a ventilator that will prevent rain and
dirt accumulating, and will admit of the interior being readily cleaned, also for
facilitating the fixing of the ventilator when being placed in position.
This I accomplish by making the ventilator in three distinct parts. A. represents
a wall box or air grating B the wall box for hopper, C, the hopper and frame,
D. D the wall of building.
In the air grating wall box A which fixed on the outside of the wall, the top
outer portion a is a solid plate preventing dirt blowing direct through the opposite
opening b. Rain and dirt passing through the open grating c falls on to the
inclined plate d and falls out through the outlet e which is a continuous opening
except for a central support the rain in falling from the ventilator is carried free
of the wall by the projected drip course f instead of running on to and disfiguring
the wall.
In the wall box B which is fixed on the inside of the wall small lugs or flanges g
will be provided for receiving the frame h of the hopper C, to which it will be
attached by means of screws k.
The usual make of this class of ventilator has the frame and hopper permanently
fixed to the wall box consequently the ventilator cannot be securely fixed, but
as B will be fixed by itself before attaching the part C. plugs can be driven round
the sides between B and the wall D securing B firmly in position.
The part C consists of a frame h with the hopper; and is separately made for
attaching to B by means of screws k. It has thus two advantages, first, during the
erection of a building if the portions C and B are made together and fixed before
the walls are plastered, the enamel or japan or painting on the face of the ventilator
is destroyed or spoiled with the plaster, second, the part C can at any time be
unscrewed and temporarily removed, and the interior space and the ventilator can
be cleaned and painted inside, the inflowing air will be more free from dust, than by
ventilators that cannot be cleaned on the inside.
The part A. may be made in metal or terra cotta.
The parts B & C may be made in metal or wood.
I therefore claim as my invention a ventilator in three parts, adapted for
throwing out and prevented from reaching the inside of the building any rain or
dirt, driven or falling against the building, to carry the rain by drip course off the
wall, facilities for securely fixing ventilator in wall and for cleaning and painting
the interior of the ventilator and wall opening.
Dated this 11th day of May 1893.

page_text: Improvements in Ventilators.
HENRY THOMAS JOHNSON St. Andrew's Chambers Albert Square Manchester
Ventilating Engineer 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, and reference being had to the drawings filed
with my Provisional Specification :-
The object of my invention is to improve the means of supplying or withdrawing
air in ventilating a building, by constructing a ventilator that will prevent rain and
dirt accumulating in the ventilator, constructed with facilities for securely fixing
the ventilator, and to admit of the interior being readily cleaned and painted.
This I accomplish by making the ventilator in three distinct parts, A represents
a wall box or air grating B represents the wall box for the hopper and frame
and C represents the hopper and frame whilst D. D shews the wall of the building.
In the air grating wall box A which is fixed on the outside of the wall, the top
outer portion a is a solid plate preventing dirt blowing direct through the opposite
opening b. Thus rain and dirt passing through the open grating c. falls on to the
inclined or curved plate d. and discharges through the outlet e. which is a continuous
(or partially so) longitudinal opening and is carried free of the wall by the
projected drip course finstead of running on to and disfiguring the wall.
The part B which is fixed on the inside of the wall has small lugs or flanges g.
provided for receiving the part C consisting of the frame h. and the hopper j. to
which it will be attached by screws k.
The usual make of this class of ventilator has the part C permanently fixed to
the part B, consequently the ventilator cannot be so securely fixed as to avoid its
being pulled out of the wall when in use, the face of the ventilator also being
attached during building operations is liable to damage, by plaster or careless
workmen.
In my invention this will be avoided as the part B can be fixed independently of
the part C and can be firmly secured by wedges, and the part C afterwards
attached when the principal building operations are complete.
By the same arrangement the part C. can at any time be temporarily removed
and the interior of the ventilator cleaned and painted.
The part A may be made in metal, terra cotta or other ware whilst the parts B
& C may be made of metal or wood.
I therefore claim as my invention, the construction as here set forth, for the
following objects viz.
The discharge of rain and dirt from the ventilator with provision to keep same
to drip clear of the wall.
Facilities for the more securely fixing the ventilator in wall.
Facilities to avoid damage during building operations and facilities for at any
time cleaning and painting the interior of the ventilator.
Dated this Eighth day February 1894.