Improvements in or connected with Corrugated Metal Sheeting.
Year: 1896

page_text: Date of Application, 3rd Feb., 1896
Complete Specification Left. 3rd Nov., 1896-Accepted, 5th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in or connected with Corrugated Metal Sheeting.
I, JAMES ALEXANDER MAIN, of Clydesdale Iron Works, Possilpark, Glasgow,
in the County of Lanark, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object the formation of louvres in corrugated sheet
metal for use in the construction of the side or end walls or highly pitched roofs of
sheds or other buildings and for ventilating purposes generally.
Under one modification of the invention ordinary sheets of corrugated metal are
cut transversely of the corrugations in a series of parallel lines terminating at points
short of the breadth of the sheet; and the portions between the lines of cutting
are set by stamping or pressing so that they each assume a slight degree of
inclination to the main body of the sheet and form ventilating openings after the
fashion of louvres or Venetian blinds. The cutting and stamping or pressing are
by preference effected at the same operation by means of shearing knives cutting
against bed knives or blocks the plates being grasped between correspondingly
corrugated blocks or resting on the table and the cutting edges of the shearing
knives being suitably inclined or beveled and also corrugated so as to cut the
sheets without breaking through or crushing the ridges of the corrugations. A
series of such louvres may be cut in a plate at each operation by a corresponding
series of parallel knives or each louvre may be cut separately and the plate fed
forward intermittently under the shearing knife or knives; and either a single
plate or a number of superposed plates may be cut and stamped at each
operation.
Instead of forming the louvres as described from corrugated sheets flat sheets
may be used, the sheets being subsequently corrugated in whole or in part, or
corrugated, cut and stamped or pressed in a single operation; or the cut louvre
portions may be left plain but pressed and inclined or dished up, whilst the sides and
ends of the sheet beyond the lines of cutting may be corrugated.
When desired short cuts may be made longitudinally of the corrugatious at the
ends of each of the parallel lines of cutting and cross corrugations formed at these
points in order to draw up or shorten the length of the sheets and cause the inclined
fouvres. to overlap.
In another modification the louvre portions between the parallel lines of cutting
instead of being inclined bodily to the plane of the sheet have only a portion of
their depth bent or inclined to form the louvres the sheet being either cut a short
distance lengthwise of the corrugations at the ends of the parallel lines of cutting
to facilitate the stamping or pressing out of the inclined parts, or the bending
being effected in the stamping or pressing operation without such longitudinal
cutting by the partial flattening out of the corrugatious at the ends of the lines of
cutting.
1000

page_text: improvements in or connected with Corrugated Metal Sheeting.
I, JAMES ALEXANDER MAIN, of Clydesdale Iron Works, Possilpark, Glasgow,
in the County of Lanark, Engineer, do hereby declare the naturo 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 has for its object the formation of louvres in corrugated sheet
metal for use in the construction of the side or end walls or highly pitched roofs
of sheds or other buildings and for ventilating purposes generally.
The invention is illustrated by the accompanying drawings, Figure 1 being a front
elevation, Figure 2 a side elevation and Figure 3 a plan of a corrugated metal
sheet embodying my invention, and Figures 4, 5 and 6, and 7, 8 and 9, like
views respectively of modifications.
CVBFC:
Under one modification of the invention as illustrated at Figures 1, 2 and 3
ordinary sheets A of corrugated metal are cut transversely of the corrugations in a
series of parallel lines B terminating at points short of the breadth of the sheet;
and the portions between the lines of cutting are set by stamping or pressing so
that each assume a slight degree of inclination to the main body of the sheet as
shown particularly at Figures 2 and 3, and form ventilating openings C after the
fashion of louvres or Venetian blinds. The cutting and stamping or pressing are
by preference effected at the same operation by means of shearing knives cutting
against bed knives or blocks the plates being grasped between correspondingly
corrugated blocks or resting on the table and the cutting edges of the shearing
knives being suitably inclined or beveled and also corrugated so as to cut the sheets
without breaking through or crushing the ridges of the corrugations. A series of
such louvres C may be cut in a plate A at each operation by a corresponding series
of parallel knives or each louvre C may be cut separately and the plate fed forward
intermittently under the shearing knife or knives; and either a single plate or a
number of superposed plates may be cut and stamped at each operation.
Instead of forming the louvres as described from corrugated sheets flat sheets
may be used, the sheets being subsequently corrugated in whole or in part, or
corrugated, cut and stamped or pressed in a single operation; or the cut louvre
portions may be left plain but pressed and inclined or dished up, whilst the sides
and ends of the sheet beyond the lines of cutting may be corrugated.
When desired short cuts D may be made longitudinally of the corrugations at
the ends of each of the parallel lines of cutting on the sheets A as shown
by Figures 4, 5 and 6 and cross corrugations E may be formed at these points in
order to draw up or shorten the length of the sheets and cause the inclined louvres C
to overlap as shown particularly at H Figure 5.
In another modification illustrated at Figures 7, 8 and 9, the louvre portions C
of the sheets A between the parallel lines of cutting instead of being inclined
bodily to the plane of the sheet have only a portion C¹ of their depth bent or inclined
to form the louvres C the sheet being either cut at F a short distance lengthwise of
the corrugations at the ends of the parallel lines of cutting B to facilitate the
stamping or pressing out of the inclined parts C', or the bending being effected in
the stamping or pressing operation without such longitudinal cutting by the
partial flattening out as shown at G of the corrugations at the ends of the lines of
cutting.
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 :-
1. Corrugated metal sheets having ventilating louvres formed in them by cutting

page_text: and pressing or stamping substantially as described with reference to Figures 1,.
2 and 3 of the accompanying drawings.
2. Corrugated metal sheets having ventilating louvres formed in them by cutting
and pressing or stamping substantially as described with reference to Figures 4,
5 and 6 of the accompanying drawings.
3. Corrugated metal sheets having ventilating louvres formed in them by cntting
and pressing or stamping substantially as described with reference to Figures 7,.
8 and 9 of the accompanying drawings.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather, Chartered Patent Agents,
62 St. Vincent Street, Glasgow, Agent for the Applicant.