Improvements in Steam Trawl Winches and the like.
Year: 1895

page_text: Date of Application. 1st Aug., 1895
Complete Specification Left, 1st Apr., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Steam Trawl Winches and the like.
CHARLES DENTON HOLMES Hull Engineering Works, Alfred Street, Hull,
Engineer, do hereby declare the nature of this invention to be as follows:
The invention consists in the application of two separate barrels to the same
main shaft, each carrying a separate trawl warp, but so arranged that both barrels
can either together or separately wind their respective trawl warps; also both
barrels can either together or separately unwind their respective trawl warps; also
either barrel can wind, or unwind, and the other barrel be at rest. All these
different motions being accomplished through the arrangement of the two barrels,
and special apparatus connected thereto.
Dated this 31st day of July 1895.
CHARLES D. HOLMES.
Improvements in Steam Trawl Winches and the like.
1, CHARLES DENTON HOLMES, of Hull Engineering Works, Alfred Street,
Hull, Engineer, 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 consists in the application of two separate barrels in combination
with driving and controlling mechanism arranged upon the same main shaft of the
winch in such a manner as to give greater convenience and efficiency in the winding
and unwinding of the trawl warps in otter board trawl gear, and for other like
services, than the winches at present in general use.
In order that my invention, and the method of carrying the same into effect,
may be the more readily understood, I append hereunto three sheets of explanatory
drawings to be hereinafter referred to.
On Sheet 1, Figure 1 is a sectional plan representing the main shaft of the winch
with two separate barrels mounted thereon, and arranged in conjunction with the
driving and controlling mechanism.
Figures 2 and 2 are end elevations, and Figure 2B a side elevation partly in
section representing one form of the mid or central clutch employed for coupling
the barrels together.
Figure 3 is a sectional plan illustrating the barrels in conjunction with a modified
arrangement of the driving, and controlling mechanism.
On Sheet 2, Figures 4 and 5 illustrate modified forms of the mid or central
clutch or coupling.
Figure 6 on Sheet 3 is a diagram representing a trawler with otter board trawl
gear, and fitted with my improved winch arranged as illustrated at Figure 3.
The same reference letters in the different views indicate the same parts.
Referring to Figure 1, Sheet 1, I fit the two barrels A and B loosely upon the
shaft C, which is supported in any ordinary bearings such as D D formed in the

page_text: winch side frames. I preferably attach warping barrels E E upon the outer ends
of the crank shaft as illustrated.
The barrel A has a brake ring A' cast with or attached to it, and the barrel B
a similar ring B', each ring being fitted with a friction brake of any ordinary
construction and arrangement. At the outer end of each barrel I mount upon the
shaft C the sliding clutches or couplings F and G operated by the hand levers Fl
and G¹, and provided with feather keys or squares on shaft to cause rotation of the
clutches with the like movement of the shaft. The shaft is rotated by the spur or
toothed wheel H which receives motion from a pinion mounted on the crank shaft
or an intermediate shaft of the winch, not shown in the drawings. I also provide a
mid or central clutch J, shown in detail at Figures 2, 2A and 2B, for coupling the
two barrels together when the end clutches are out of gear. Figure 2 is an end
elevation of the barrel A and Figure 2A a similar view of the barrel B. The
sliding drop clutch or coupling is mounted upon the flange of the barrel A as
illustrated, the sliding or drop clutch or catch pieces J¹ being raised or lowered by
means of the levers J³ pivotted upon the flange. As shown at Figures 2 and 2B
the catch pieces are drawn out clear of the ears or lugs projecting from the boss of
the barrel B and the two barrels are thus disconnected but on forcing the catch
pieces into the jaws or spaces between the projecting lugs the two barrels will be
securely connected together.
When requiring to drive the two barrels together in the direction for simul-
taneously winding in the warps or ropes I throw each of the end clutches F and G
into gear with the barrels A and B respectively. When requiring to wind with
one barrel only, say the barrel A, whilst the barrel B is at rest, I brake or secure
the barrel B and throw the clutch G out of gear, and thus on the revolution of the
shaft C only the barrel A will move with it.
To allow both barrels to unwind together under the tension on the warps, I throw
out the end clutches F and G and put the mid or central clutch or coupling J in
gear; the barrels being thus connected they will unwind simultaneously, the speed
of rotation being regulated by means of the brakes. To permit of the barrels
unwinding at different rates of speed, I throw out the clutch J thus disconnecting
the barrels.
For services where exactly simultaneously unwinding of the barrels is not
essential I dispense with the mid or central clutch J, and regulate the unwinding
entirely by the brakes A¹ and B'.
In the modified arrangement shown at Figure 3, only one end clutch is employed
and the application of such a winch in connection with otter board trawl gear is
illustrated-by-the-diagram-Figure 6-on-Sheet-3.-The-winch-is-mounted-in-a-con-
venient position upon the deck of the vessel, the warp K from the barrel A being
attached to the fore otter board L, and the warp M from the barrel B to the after
otter board N. In winding in the net O, both barrels A and B are driven
together (being connected by the mid or central clutch J) until the after otter
board N is drawn alongside the vessel. The winch is then stopped, the barrel B
secured by its brake, and the mid clutch J thrown out of gear, thus disconnecting
the two barrels. On the winch being again set in motion, only the barrel A is
revolved, and thus the warp K is wound in until the fore otter board L is also
brought alongside the vessel."
Instead of employing a mid or central clutch of a type such as illustrated on Sheet 1,
I sometimes employ an ordinary sliding claw clutch such as P (Figure 4, Sheet 2)
which is mounted upon the shaft C or upon an extended portion of the boss of the
barrel A as illustrated. I also adopt a clutch or coupling consisting of prongs such
as Q (Figure 5) projecting from a sliding sleeve or collar Q¹ which is mounted
loosely upon the end clutch F. The prongs Q have square ends fitting freely
within like apertures in the end of the barrel A, and on sliding forward the
sleeve Q by means of the lever Q2, the square ends of the prongs are forced into
the easy fitting square holes in the end of the barrel B, and thus the two barrels A
and B are connected together.

page_text: I do not limit myself to the particular types of clutches or couplings herein before
described, but employ varying forms of such appliances suitable for the required
service.
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. The construction of steam trawl winches and the like having two separate
barrels mounted upon the same shaft, and so arranged in conjunction with driving
and controlling mechanism that the barrels may be revolved in the direction for
winding or unwinding their respective warps either together or separately,
substantially as described.
2. In steam trawl winches and the like the combination of two separate barrels
each having a brake and mounted upon one common shaft, with two end clutches
or couplings and one mid or central clutch or coupling substantially as and for the
purposes hereinbefore described and as illustrated in the accompanying drawings.
3. In steam trawl winches and the like the combination of two separate barrels
each having a brake and mounted upon one common shaft, with one end clutch and
one mid or central clutch or coupling, substantially as and for the purposes
hereinbefore described and as illustrated in the accompanying drawings.
Deted this 21st do of Manal 1004
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.