IMPROVEMENTS IN THE CONSTRUCTION OF VENTILATORS, AND IN THE METHOD OF FIXING THE SAME
Year: 1885

page_text: Method of Fixing the same.
I JAMES BEDFORD of 14 Nelson Street Halifax in the County of York,
Ventilating Engineer do hereby declare the nature of my invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF VENTILATORS, AND IN THE METHOD
OF FIXING THE SAME" to be as follows:-
My invention relates to improvements in the form or construction of that class
of Ventilators which is fixed to the roof of the building it is intended to ventilate,
and to an improved and simplified method of fixing the same.
To carry out my improvements, I form at the bottom part of the cylindrical
shaft of the ventilator a shoulder, and from this shoulder the shaft is continued
downwards in a square form, as far as may be necessary.
In order to fix the square part of the shaft, or the base of the ventilator in the
roof of a shed or other building, I trim, or otherwise form a square space with
suitable timbers, or a metal framework, between the spars, and between the slate
laths, which form the roof of the building, and the size of the square space thus
formed is regulated to receive and fit to the square part of the shaft, or the base
of the ventilator.
Two of the sides of the square base of the ventilator are cut off at an angle to
correspond with the internal slope of the roof. The square base of the ventilator,
when placed in position in the square space hereinbefore referred to, is secured to
the trimmers or metal framework, which form the sides of the square space, by
means of nails or screws.
At the bottom of the wood or metal lining of the square space, and round the
edge thereof, is fixed a wooden or metallic beading or moulding, which serves partly
as a ledge or support for the bottom edge of the base of the ventilator to rest upon,
and also as a boundary or finish for the plastering to be carried up to.
At the required position upon the outside of the shaft of the ventilator, a flashing
or border of sheet lead is soldered, in order that the flashing may be turned down
to the required position without the use of fire or soldering tools upon the roof.
By means of my improved method of constructing and fixing ventilators, as
herein described, I am enabled to save much of the time and labour that has been
hitherto expended in fixing ventilators upon roofs, and especially in making good
and fitting the slates and flashing thereto, and in otherwise making the junction
between the base of the ventilator and the slates or other covering of the roof
weather tight.

page_text: Method of Fixing the same.
I, JAMES BEDFORD of 14 Nelson Street, Halifax in the County of York,
Ventilating Engineer, do hereby declare the nature of the said invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention relates to improvements in the form or construction of that class
of ventilators which is fixed to the roof of a building it is intended to ventilate,
and to an improved and simplified method of fixing the same.
To carry out my improvements, I form at the bottom part of the cylindrical
shaft of the ventilator a shoulder, and from this shoulder the shaft is continued
downwards in a square form as far as may be necessary.
In order to fix the square part of the shaft, or the base of the ventilator, in the
roof of a shed or other building, I trim or otherwise form a square space with
suitable timbers, or a metal framework, between the spars and between the slate
laths, which form the roof of the building and the size of the square space thus
formed, is regulated to receive and fit to the square part of the shaft or base of the
ventilator.
Two of the sides of the square base of the ventilator are cut off at an angle to
correspond with the internal slope of the roof. The square base of the ventilator,
when placed in position in the square space herein before referred to, is secured to
the trimmers, or metal framework which form the sides of the square space, by
means of nails or screws.
At the bottom of the wood or metal lining of the square space and round the
edge thereof is fixed a wooden or metallic beading or moulding which serves
partly as a ledge or support for the bottom edge of the base of the ventilator to
rest upon, and also as a boundary or finish for the plastering to be carried up to.
At the required position upon the outside of the shaft of the ventilator a
flashing or border of sheet metal is soldered in order that the flashing may be
turned down to the required position when the ventilator is fixed in its place,
without the use of fire or soldering tools upon the roof.
In order to enable my invention to be fully understood, I will proceed to describe
the same with reference to the accompanying drawings in which
Figure 1 represents an elevation of a ventilator of my improved construction and
fixed upon the ridge of a roof according to my improved method.
Figure 2 represents an elevation of a similar ventilator fixed to the slope of
a roof.
Figures 3 and 4 represent plans of square or rectangular spaces trimmed and
lined to receive the square base of a ventilator.
Similar letters refer to similar parts in all the drawings.
The cylindrical shaft of the ventilator is represented at A. and the shoulder
terminates at the line B B, where the cylindrical part terminates and the
square C begins.

page_text: In figure 1 a moulding F is fixed round the square base O and below this
moulding the strip of sheet metal G forms a socket which rests upon the wood
casing D.
The lead flashing E lies partly upon the roof, is continued up the side of the
wood casing D and terminates at the inside of the top edge of this casing.
The wood casing D is secured to the roof timbers H and forms a square or
rectangle between the timbers of a suitable size to receive and fit the square base
of the ventilator. The ventilator is secured to the wood casing or roof timbers by
nails or screws at J.
In Figure 2 the square base of the ventilator is carried down to and rests upon
the ledge of beading or moulding K and is secured by nails or screws at J. At E
is the lead flashing which lies partly upon the roof and is carried a short distance
up the side of the ventilator, where it is overlapped by another flashing soldered to
the ventilator. The plastering of the roof comes up to and is terminated by the
moulding K.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. A ventilator formed with a square or rectangular base to fit in a square casing
or a square trimmed space between the roof timbers, with the flashing, and
mouldings for the base of the ventilator to rest upon, all substantially as described
and represented in the accompanying drawings.
2. The improved method of securing the ventilator between the timbers of a
roof, by means of nailing or screwing from the inside to a wood casing or to
trimmers fixed to the roof timbers, substantially as described and represented in
the accompanying drawings.