Year: 1886

page_text: Date of Application, 30th Nov., 1886,
Complete Left, 29th Aug., 1887.
Complete Accepted, 30th Sept., 1887.
I PARLANE MACFARLANE WALKER, of 12 Blackwall, Halifax, in the County of
York, Veterinary Surgeon, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improved appliances connected with the ventilation
of buildings, rooms, passage ways, lamps, and generally, the object being to prevent
draughts by breaking up, dispersing diverting, and turning the incoming current or
column of air.
For purpose aforesaid I employ perforated plates of form and dimensions according
to the position, and surroundings.
For general purposes I employ these perforated plates enclosed in a casing having
open ends for ingress, and egress of the air, the perforations are preferably so arranged
that not any two are opposite or linable with each other, so that the air passing in
through the perforations of the first or outer plate, strikes upon the plain or
non perforated surface of the second or succeeding plate, its impetus or force is
thereby broken, and in addition to the column being broken it is subdivided, and
on passing through the perforations of the second plate the air is again subdivided
before admittance into the room or other place to be ventilated.
This arrangement when the perforated plates are concentric is specially applicable
for use on street lamps or lamps as air inlets and outlets exposed to sudden gusts
or violent winds, the perforations ensuring the necessary supply of air without the
inrush which disturbs and shakes the flame. The said plate or plates perforated
as described is or are specially applicable for the ventilation of rooms when placed
at an angle to an open window, being hinged to the wood work so as when not in use
to lie flat, but when to operate, the bottom window is to be partially opened and the

page_text: perforated plate or plates are then folded over on the hinges whereon the outer edge
of the perforated plate rests against the bottom bar of the window, so that all the air
coming in at the open window must pass through the perforations, and instead
of passing in horizontally it is diverted and turned upwards, or in other direction
according to the angle and direction of the perforations, which perforations in any
material thicker than sheet metal I make at an angle or obliquely to the thickness of
the material through which they are formed, as perforations so formed entirely
prevent any direct current passing through, and I arrange such perforations radially the
better to turn and divert the air.
In some cases the holes are provided with projecting air conducting tubes.
Dated this 29th day of November 1886
WALTER BRIERLEY,
Town Hall Buildings, Halifax,
Agent for the Applicant.

page_text: 1. PARLANE MACFARLANE WALKER of 12 Blackwall, Halifax in the County of
York, Veterinary Surgeon, 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 relates to improved appliances connected with the ventilation
of buildings, rooms, passage ways, lamps, and generally, the object being to prevent
draughts by breaking up, dispersing diverting, and turning the incoming current or
column of air.
For purpose aforesaid, I employ perforated plates of form and dimensions according
to the position and surroundings.
For general purposes I employ these perforated plates enclosed in a casing having
open ends for ingress, and egress of the air, the perforations are preferably so
arranged that not any two are opposite or linable with each other so that the
air passing in through the perforations of the first or outer plate strikes upon the
plain or non-perforated surface of the second or succeeding plate, its impetus or force
is thereby broken, and in addition to the column been broken it is subdivided and
on passing through the perforations of the second plate the air is again subdivided
before admittance into the room or other place to be ventilated.
This arrangement when the perforated plates are concentric is specially applicable
for use on street lamps as air inlets and outlets exposed to sudden gusts or violent
winds the perforations ensuring the necessary supply of air without the inrush which
disturbs and shakes the flame. The said plate or plates perforated as described is or
are specially applicable for the ventilation of rooms when placed at an angle
to an open window being hinged to the wood work so as when not in use to lie flat,
but when to operate, the bottom window is to be partially opened and the perforated
plate or plates are then folded over on the hinges whereon the outer edge of the
perforated plate rests against the bottom bar of the window, so that all the air coming
in at the open window must pass through the perforations, and instead of passing
in horizontally it is diverted and turned upwards, or in other direction according
to the angle and direction of the perforations, which perforations in any material
thicker than sheet metal I make at an angle or obliquely to the thickness of the
material through which they are formed as perforations so formed, entirely prevent
any direct current passing through, and I arrange such perforations radially the
better to turn and difuse the air.
Such being the nature and object of this my invention the following is a complete
description of same, reference being had to the accompanying drawings:-
Fig. 1 is a section of perforated plates.
Fig. 2 is a section of perforated plate or board suitable for use in connection with
the window or other air entrance to the room or building.
Fig. 3 is a like section showing air excluding flap raised.

page_text: Fig. 4 is an elevation of a stouter plate, board, or earthenware slab having
perforations oblique and radial to its surface.
At 1 is a plate of metal or other material secured to the plate 2, each of the plates
are perforated as shown, and it will be observed that the perforations in No. 1 plate
are opposite the nonperforated part of plate 2 that is to say not any two perforations
are opposite or linable with each other so that the incoming current of air through
the perforations in plate 1 will first strike on the inner face of plate 2 which thus
acts as so many difusing plates for the currents of air, the latter will then pass out
through the perforations of the second plate as indicated by the arrows 3. I have
found in practice that the relative position or distance by which the plates are
separated is important, and as a rule, if the distance be about equal to the diameter
of the perforations, good results are obtained; these plates further serve as a means
of preventing in a great measure the entrance of dust, and fogs or vapour are retarded
and condensed between the plates, and it will be obvious that more than two plates
may be employed.
At 4 is a plate forming one end of a box or casing and is provided with a closing
door or flap 5 which may be raised as shown at fig. 3 so as to exclude the entrance
of air. In this case the perforations 6 of the plate 4 are oblique and radial as shewn
by figures 2, 3 & 4 the object being in all cases to break up, divert, and difuse
the air so as to avoid draughts or inrushes occasioned by gusts of wind, the two
more perforated plates as referred to in connection with fig. 1 are specially
suitable for outdoor lamps or to lamps burning volatile or other explosive oils
because they ensure the necessary supply of air and prevent the danger arising from
gusts or sudden inrushes of air.
or
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, 1 declare that what I claim is :-
1. The perforated plates when so arranged as that the holes in one plate are
opposite the non-perforated portion of the succeeding plate, as and for the purpose
herein set forth.
2. Plates for ventilating purposes wherein are perforations, the perforations being
oblique and radial to the surface or face of the plate as herein fully described and
illustrated by annexed drawings.
Dated this 27th day of August 1887.
WALTER BRIERLEY,
Town Hall Buildings, Halifax,
Agent for the Applicant.