Improvements in Apparatus for use in connection with Trawl Fishing.
Year: 1892

page_text: Date of Application, 10th Nov., 1892
Complete Specification Left, 10th Aug., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for use in connection with Trawl
Fishing.
We, THOMAS DAVIES, of 30 Strand Street, Engineer, and HENRY THOMAS, of
40 Kirkdale Vale, Engineer, both of the City of Liverpool in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to apparatus for use on a trawl fishing boat to lead the tow
line to which the trawl beam is attached, to the winch.
Such apparatus consists of two portions, the gangway rollers which act as fair-
lead rollers for the tow line as it comes inboard through the bulwark of the boat,
and the centre bollard which guides the tow line from the gangway rollers to the
winch.
The gangway rollers, which are carried in a frame attached to the framing of
the boat's side, as usually constructed, consist of a horizontal roller, two vertical
rollers outside the horizontal roller and a third vertical roller inside the horizontal
roller, the tow line passing inboard between the outer vertical rollers, over the
horizontal roller and round the inside vertical roller to the centre bollard and
then to the winch; the centre bollard, according to the usual construction
In the
consists of a flanged roller capable of rotation round a vertical axis.
construction of gangway rollers and centre bollard described, it is found that
the outer vertical rollers of the former and their bearings are very liable to
injury on account of their projection beyond the boat's side, this projection being
due to the fact that the vertical rollers project beyond the horizontal roller which
of course must project beyond the boat's side; and with regard to the centre
bollard it is found that although it rotates with the tow line as the latter passes
round it, there is considerable wear near the lower flange and this, according to
the usual construction, necessitates the frequent renewal of the entire roller; and
the objects of our invention are to so modify the construction of the gangway
rollers and the centre bollard that the amount of projection of the former and the
cost and inconvenience of renewing the worn portions of the latter are considerably
reduced.
According to our invention we construct the gangway rollers as follows;-We
make the horizontal roller of considerably larger diameter than the vertical rollers
but we reduce the diameter of the portions of the horizontal roller beyond the inner
edges of the outer vertical rollers so that the latter can be set back until their
projecting edge is approximately in the same vertical plane as the projecting edge
of the horizontal roller. In order that there may be as small a gap as possible
between the ends of the horizontal roller and the inside edges of the outer vertical
rollers we make those portions of the latter which are opposite the horizontal roller
of spheroidal configuration, the maximum diameter being in the same horizontal
plane as the axis of the horizontal roller, and the ends of the latter being dished so
as to follow the contour of the spheroidal portion. The horizontal roller runs on a
steel pin and is located laterally by suitable bosses which are cut away to clear the
outer vertical rollers. The inner vertical roller is of the usual construction and
stands clear of the horizontal roller. The rollers are made preferably of chilled
iron and the journals of the vertical rollers are formed of steel pins cast in the
rollers and are carried in suitable adjustable bearings.
We construct the centre bollard as follows;-Instead of forming the flanged
roller before referred to in one piece we form the lower flange, and a central
portion of less diameter and of hexagonal cross section, in one piece which is bored
to run on a vertical pin carried by a suitable bracket. The body of the roller is
composed of a number of discs each having a central hexagonal bore to fit the.

page_text: hexagonal portion of the central piece and a grooved periphery; these are placed on
the central piece and are secured in position by the top flange which screws on to
the upper portion of the central piece, which is threaded for this purpose.
According to this construction it will be seen that as the wear takes place chiefly
near the lower flange, the discs at this end, as they become worn, may be exchanged
for the other unworn discs and so obviate the necessity of renewing the whole roller
on account of local wear.
Dated this Ninth day of November 1892.
SLOAN & LLOYD BARNES,
Castle Chambers, 26, Castle Street, Liverpool,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus for use in connection with Trawl
Fishing.
We, THOMAS DAVIES, of 30 Strand Street, Engineer, and HENRY THOMAS, of
40 Kirkdale Vale, Engineer, both of the City of Liverpool in the County of
Lancaster, 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 apparatus for use on a trawl fishing boat, to lead the
tow line, to which the trawl beam is attached, to the winch.
Such apparatus consists of two portions, the gangway rollers which act as fair-
lead rollers for the tow line as it comes inboard through the bulwark of the boat,
and the centre bollard which guides the tow line from the gangway rollers to the
winch.
The gangway rollers, which are carried in a frame attached to the framing of
the boat's side, as usually constructed, consist of a horizontal roller, two vertical
rollers outside the horizontal roller and a third vertical roller inside the horizontal
roller, the tow line passing inboard between the outer vertical rollers, over the
horizontal roller and round the inside vertical roller to the centre bollard and then
to the winch; the centre bollard, according to the usual construction, consists of a
flanged roller capable of rotation round a vertical axis. In the construction of
gangway rollers and centre bollard described, it is found that the outer vertical
rollers of the former and their bearings are very liable to injury on account of their
projection beyond the boat's side, this projection being due to the fact that the
vertical rollers project beyond the horizontal roller which of course must project
beyond the boat's side; and with regard to the centre bollard it is found that,
although it rotates with the tow line as the latter passes round it, there is con-
siderable wear near the lower flange and this, according to the usual construction,
necessitates the frequent renewal of the entire roller; and the objects of our
invention are to so modify the construction of the gangway rollers and the centre
bollard that the amount of projection of the former and the cost and inconvenience
of renewing the worn portions of the latter are considerably reduced.
In the accompanying drawings,
Figs. I to IV show gangway rollers, and Figs. V and VI a centre bollard,
constructed according to our present invention.
Referring to the gangway rollers, Fig. 1 is an elevation, Fig. II a plan, Fig. III
a sectional elevation on the line A. A. of Figs. I, II and IV, and Fig. 1V is a
sectional plan on the line B. B. of Figs. I and III.
Referring to the centre bollard, Fig. V is a sectional elevation on the line C. C.
of Fig. VI and Fig. VI-is a plan.
Throughout the drawings, the same parts are indicated by the same reference
figures, and in the case of sections, the direction in which they, are viewed is
indicated by the small arrows adjacent to the letters denoting the plane of section.

page_text: Referring now to Figs. I to IV ;-
1 is a rigid frame which carries the rollers; it is secured by the flanges 2 to the
bulwarks or framing of the boat's side and carries the horizontal roller 3, the outer
vertical rollers 4 and the inner vertical roller 5, all adapted to rotate freely.
The roller 3 is of considerably larger diameter than the vertical rollers, sufficiently
large in fact to allow the rollers 4 to be set back until their projecting edges are
approximately in the same vertical plane as the projecting edge of the roller 3,
while their inner edges stand clear of the fixed pin 6 upon which the roller 3 is
journalled, see Fig. IV. If the rollers 4 were made of uniform diameter
throughout there would be a gap at each end of the roller 3 into which the tow line
might enter and jam, and to obviate this, the rollers 4, where contiguous to the
roller 3, are made of spheroidal configuration, as shown at 7, the ends of the
roller 3 being dished to follow the contour of the spheroidal portions. The bosses 8
which carry the pin 6 are cut away as shown in Fig. IV to clear the rollers 4.
The bearing surface of the roller 3 is lubricated through an axial hole in the pin 6
supplied from an oil cup screwed into the head of the pin.
It will be seen that, by the construction described, the periphery of the roller 3
is practically in close contact with the rollers 4 over the arc x-x (Fig. III) and
there is thus no gap between the rollers into which the tow line can enter; it is
also clear that the only parts of the apparatus which project beyond the limits of
the roller 3 are the enlarged portions of the rollers 4.
The inner vertical roller 5 is of the usual construction and stands clear of the
roller 3. The rollers are made preferably of chilled cast iron and the journals of
the rollers 4 and 5 are formed of steel pins cast in the rollers and are carried in
suitable adjustable bearings 9; in order to reduce the amount of the projection
beyond the boat's side, the caps of the bearings for the outer rollers 4 are set in
flush with the outside of the frame and secured by countersunk screws.
Referring now to Figs. V and VI which show the improved centre bollard ;-
Instead of forming the flanged roller which guides the tow line in one piece as
heretofore, we form the lower flange 10 and the central portion 11 in one piece.
11 is of hexagonal cross section and is bored to run freely on the fixed pin 12
carried in the bracket 13, secured to the deck. The body of the roller is composed
of a number of discs 14 which have grooved peripheries and fit freely on the
hexagon of the central portion 11; they are held in position by the upper flange 15
which screws on to 11, being locked in position by the set screw 16 screwed half
into 11 and half into 15. An oil passage 17 is provided to lubricate the bearing
surface and the pin 12 is secured by the set screw 18.
According to the construction shown, it will be seen that as the wear takes place
chiefly near the lower flange, the discs at this end, as they become worn, may be
exchanged for the other unworn discs and so obviate the necessity of renewing the
whole roller on account of local wear.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is ;-
(1.) The hereindescribed improvements in gangway rollers, which consists in
placing the outer vertical rollers so that their outer edges are approximately in the
same vertical plane as the outer edge of the horizontal roller, in making the portions
of the vertical rollers contiguous to the horizontal roller of spheroidal form, and in
dishing the ends of the horizontal roller to follow the contour of the said spheroidal
portions, so that no gap is left between the rollers into which the tow line can
enter;-substantially as and for the purpose set forth.
(2.) In gangway rollers, the combination of a horizontal roller 3 with dished
ends, and vertical rollers 4 of spheroidal form where contiguous to the roller 3, the
rollers being mounted in a suitable frame so that the said spheroidal portions are
partially housed within the dished ends of the roller 3,-substantially as and for the
purpose described and illustrated.

page_text: (3.) The improved gangway rollers, substantially as described and illustrated in
Figs. I, II, III and IV.
(4.) The hereindescribed improvement in centre bollards which consists in
making the body of the roller of detached discs 14, fitting on a central portion 11,
so that they can be readily exchanged or replaced when worn,-substantially as set
forth.
(5.) The improved centre bollard, substantially as described an illustrated in
Figs. V and VI.
Dated this 9th day of August 1893
SLOAN & LLOYD BARNES,
Castle Chambers, 26, Castle Street, Liverpool,
Agents for the Applicants.