Year: 1887

page_text: I JAMES SEASON of Hunslet Road Leeds in the County of York Slater do hereby
declare the nature of this invention to be as follows:-
My Invention refers to such roofs as are constructed entirely of iron and slates, and
which are therefore fire-proof; and has for its object the securing in a simple and
effective manner of the slates to the iron framework of the roof.
Such framework generally consists of rows of angle irons at right angles to each
other, the slates being attached to the outer horizontal or purlin rows; these latter
being fixed to and carried from the inclined or rafter angle irons by means of chairs
or similar devices. Such an attachment has the disadvantage, that the weight of the
roof is considerably increased.
Now my Invention consists in a simple mode of attaching the two sets of angle
irons together, (i.e. the inclined or rafter rows to the horizontal or purlin rows). This
I effect by cutting or notching the inner leaf of each horizontal angle iron, where it
crosses an inclined or rafter angle iron for a width equal to the outside width of the
outer side or leaf of the rafter angle iron, and to a depth equal to the inside depth of
the inner leaf itself.
The outside leaves of the horizontal or purlin angle irons thus rest directly on the
outside leaves of the inclined or rafter angle irons. The two sets of angle-irons are
secured together, where they cross each other by a bolt and nut; the bolt passing
through the outer leaves of both angle irons. The horizontal or purlin. angle irons
are placed below each other at a depth equal to the length of the slates. The slates
are attached to the purliu angle irons by copper nails or lead pegs, which pass first
over the inner or top leaves, and are then bent down and back under the same.
The slates are arranged to overlap and break joint with each other in the usual
manner.
Dated this 8th day of October 1887.
J. CLARK JEFFERSON,
2, East Parade, Leeds,
Agent for Applicant.

page_text: I JAMES SEASON of Hunslet Road Leeds in the County of York Slater, 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:
My Invention refers to such roofs as are constructed entirely of iron and slates, and
which are therefore fire proof; and has for its object the securing in a simple and
effective manner of the slates to the iron-framework of the roof.
Such framework generally consists of rows of angle irons at right angles to each
other, the slates being attached to the outer horizontal or purlin rows; these latter
being fixed to and carried from the inclined or rafter angle irons by means of chairs
or similar devices. Such an attachment has the disadvantage that the weight of the
roof is considerably increased.
Now my Invention consists in a simple mode of attaching the two sets of angle
irons together, (i.e. the inclined or rafter rows to the horizontal or purlin rows). This
I effect by cutting or notching the inner leaf of each horizontal angle iron, where it
crosses an inclined or rafter angle iron, for a width equal to the outside width of the
outer side or leaf of the rafter angle iron, and to a depth equal to the inside depth of
the inner leaf itself.
The outside leaves of the horizontal or purlin angle irons, thus rest directly on the
outside leaves of the inclined or rafter angle irons. The two sets of angle irons are
secured together, where they cross each other by a bolt and nut; the bolt passing
through the outer leaves of both angle irons. The horizontal or purlin angle irons
are placed below each other at a depth equal to the exposed length of the slates.
The slates are arranged to overlap and break joint with each other in the usual
manner.
And in order that my Invention may be more clearly understood reference is given
to the accompanying drawing and to the letters and marks thereon.
Fig. 1 is an outside view, Fig. 2 is a cross-section, and Fig. 3 a view of the under
side of a roof constructed in accordance with my Improvements. Fig. 4 is a detailed
view of a purlin or horizontal angle iron shewing the notches.
In the Figs. a are the horizontal or purlin angle irons, which are notched or cut on
their inner leaves at b, so as to fit over the inclined or rafter angle irons c; the two
rows of angle-irons being secured together, where they cross each other by means of
a bolt passing through the outer leaves of both angle irons. The cutting or notching,
(see Fig. 4), is preferably for a width equal to the outside width of the outer side or
leaf of the inclined or rafter angle iron, and to a depth equal to the inside depth of
the inner leaf itself.

page_text: The horizontal or purlin angle irons are placed below each other at a depth equal to
that of the exposed parts of the slates, (see Fig. 1), since each purlin angle iron serves
for the purpose of attaching a corresponding horizontal row of slates.
It will be evident that i iron may be used instead of ■ iron for either (or both)
rafters or (and) purlins.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The arrangement of angle or 1 iron framing, having notched purlins substantially
as and for purposes herein set forth.
s and for purposes nerein set fort
Dated this 28th day of June 1888.
J. CLARK JEFFERSON, Assoc. R.S.M.,
2, East Parade, Leeds,
Agent for Applicant.