An Arrangement of Steel or Iron Beams for Trawlers and Trawl Nets.
Year: 1892

page_text: Date of Application, 11th Mar., 1892
Complete Specification Left, 29th Sept., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
An Arrangement of Steel or Iron Beams for Trawlers and
Trawl Nets.
I, HECTOR FOSTER FOURNY, residing at 19 Spring Street, in the Town of
Kingston upon Hull, and practising as a Consulting Engineer & Marine Surveyor
at French Chambers, Queen's Dock, Hull, do hereby declare the nature of this
invention to be as follows:-
This arrangement consists of a steel or iron beam or joist of I section (H),
consisting either of one rolled beam or joist, or formed of two channel beams or
joists, riveted back to back to form an equivalent section as shewn at (M). At.
each end of the beam is fitted a trawl head (D), the beam or joist lying on its side
as shewn in drawing, or fitted on its back as may be most suitable. Stop pieces (E),
are riveted to each flange of the beam, at each end, to regulate distance of trawl
heads (D), from one another.
At each end. of beam, immediately in way of trawl head (D), hard wood
blocks (W) are fitted, either with screwed or clinched bolts (B), to serve as filling
in pieces, for hollow portion of beam, and to give additional stiffness to fixing of
trawl head. Instead of wood blocks, this hollow portion may be plated over to
form a square filling part for trawl head (D).
The trawl heads (D), are held in position against stop pieces (E), by means of
cotters (C), passing through beam flanges.
Along the beam (H), cleats, eyebolts or ring bolts may be fitted for attaching
ropes & lashings.
An enlarged section of method of attaching trawl heads is shewn at Z.
Dated this 104.
CM1 1000
COMPLETE SPECIFICATION.
An Arrangement of Steel or Iron Beams for Trawlers and
Trawl Nets.
I, HECTOR FOSTER FOURNY, residing at 19 Spring Street, in the Town of
Kingston upon Hull, and practising as a Consulting Engineer & Marine Surveyor
at French Chambers, Queen's Dock, Hull, 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 has for its object the arrangement and construction of steel or iron
beams for trawlers and trawl nets.
This arrangement of beam consists of a rolled, wrought or riveted length of iron
or steel of H section, slightly cambered to enable it to stow along the curve of the
ships bulwarks and also to allow for the natural deflection which takes place in a
beam, when supported at the extreme ends only.
Suitable stops are bolted or riveted on the flanges of the beam at both ends, to
fix the distance of the trawl heads, and a cottar or key is fitted through the flanges
& against the trawl heads, to keep them hard up against the stops.
Suitable hard wood blocks are fitted at each end to serve as filling in pieces, to
give additional stiffness to fixing of trawl heads. The remaining portion of the
beam may be filled in with wood for additional stiffness, or with wood and any
material of light specific gravity to reduce the weight of the beam when immersed
in water.

page_text: Instead of wood blocks, the hollow portion of the beam may be plated over in
part or for the whole length.
In order that my invention may be fully understood and readily carried into
effect, I will describe it more particularly by the aid of the drawings left with
the Provisional Specification, in which is represented a beam constructed in the
manner above referred to.
DESCRIPTION OF THE DRAWINGS.
The beam consists of a rolled or wrought length of steel or iron of I section, H;
consisting either of one rolled or wrought joist, or formed of two channel bars or
joists, riveted back to back to form an equivalent section [, M.
At each end of the beam is fitted a trawl head D, the beam or joist lying on its
side as shewn in drawings or fitted on its back as may be most suitable. Stop
pieces E, are riveted to each flange of the beam at each end, to regulate distance
of trawl heads D, from one another.
At each end of the beam, immediately in way of trawl heads D, hard wood blocks
are fitted with screwed or clinched bolts B, to serve as filling in pieces for hollow
portion of beam, and to give additional stiffness to fixing of trawl heads. The
remaining portion of the hollow part of the beam is, or may be filled in with wood
alone, or with wood and any material of light specific gravity. Instead of wood
filling the hollow portion of the beam, it may be plated over, either in part for
trawl heads D, or for the whole length.
The trawl heads D, are held in position against stop pieces E, by means of
cottars or keys passing through beam flanges.
Along the beam H, cleats, eyebolts, or ringbolts may be fitted for attaching
ropes.
The beam may be slightly curved or cambered to enable it to stow along the
curve of the ships bulwarks, and also to allow for the deflection when the beam is
supported at the extreme ends.
An enlarged section of the method of attaching the trawl heads is shewn at Z.
The following are advantages belonging to a beam constructed in the manner
herein before described.
A beam of greater strength than obtained in wood of equal weight.
Less surface exposed to the resistance of the water when trawling.
A more compact form of beam and consequently less room required for stowage
on board ship.
Having now particularly described & ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that I do not claim any
of the parts of the beam separately, or otherwise than as working in combination
for the purpose or purposes described, but I declare that what I claim is :-
The arrangement and combination of the whole of the parts constituting the
beam adapted for trawlers and trawl nets, in the manner and by the means
substantially as described.
Dated this Twenty-eighth day of September Eighteen hundred and ninety-two.