Improved Double Barrelled Winch
Year: 1896

page_text: Date of Application, 15th Oct., 1896
Complete Specification Left, 13th May, 1897-Accepted 3rd July, 1897
Improved Double Barrelled Winch,
ARTHUR JEFFS, of Queen's Parade, Gt. Grimsby, Steam Trawler Owner, and
JAMES INCHES, of 17 Cavendish Street, Gt. Grimsby, Engineer, do hereby declare the
nature of this invention to be as follows:--
The invention is an improvement in the mode of driving Double Barrelled Winches:
for bauling the Gear of Steam Trawlers.
The Barrels having Spur Wheels, Cast, Keyed or bolted thereto, are driven direct
by moveable Pinions from either the Disc or second motion shaft.
Improved Double Barrelled Winch.
We, ARTHUR JEFFS, of Queen's Parade, Steam Trawler Owner, and JAMES INCHES,
of 17, Cavendish Street, Engineer, both in Great Grimsby, in the County of Lincoln,.
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 double barrelled winches for hauling the gear of steam
trawlers, and has special reference to the driving mechanism employed therefor.
The usual method of driving these barrels is through clutches which are keyed on
the same shaft by a sliding feather and thrown in and out of gear with the barrels as
required, which method is open to serious objection, because an enormous strain is
put upon the clutches when the barrels are working nearly full of rope owing to the
then effective diameter of the barrel being so much larger than the diameter of the
said clutches at the line of resistance the strain on the clutches being necessarily in
proportion to the two diameters; (i.e. the diameter to centre of coiled rope or line of
pull on the barrel, and diameter of clutch at line of resistance) the greater strain being
on the clutches, sometimes in the ratio of about 5 to 1.
The object of our invention is to obviate this defect by employing barrels having
spur wheels cast, keyed, or bolted thereto so that instead of being driven by clutch
gearing from the shaft on which they are mounted they are driven by pinions
adjustably mounted on another shaft which may be the engine shaft or other motion
shaft, by which arrangement the strain from the winding barrels is taken on the
teeth of the spur wheels, which are of any required diameter and may therefore be
larger in diameter than the maximum effective diameter or line of pull on the
barrels, so that the strain upon the toothed wheels is always moderate and usually
less than the tension of the coiled, rope, consequently there is correspondingly less
liability to breakage than with the ordinary clutch arrangement..
And in order that our invention may be clearly understood and readily carried into
effect we will now proceed to describe the same with reference to the accompanying

page_text: drawing in which like letters of reference indicate corresponding parts in all the
figures.
Fig. 1 is a sectional plan of a double barrelled winch embodying in its
construction the essential features of our invention.
Fig. 2 is a corresponding sectional view taken on line x x of Fig. 1 when looking
from left to right.
Figs. 3 and 4 are sectional plan views similar to Fig. 1 but illustrating modified
arrangements for applying the driving and controlling mechanism.
Referring to Figs. 1 and 2, a is the shaft on which the two drums or barrels band c
are loosely mounted, which shaft is supported in any suitable bearings such as d d
formed in connection with the winch side frames. This shaft has hitherto been used
as the driving shaft of the winding barrels b and c as well as of the usual warping
barrels e e¹ which are mounted upon the outer ends of the shaft as illustrated. The
barrels b, c are furnished with brake rings b c¹ cast with or attached thereto as one
piece which rings are fitted each with a friction brake of any ordinary construction
and mode of action. To the flange of each barrel a spur wheel ff is cast, keyed,
bolted or otherwise secured and geared to pinions g g¹ mounted adjustably on the
shaft h. The pinions are controlled by levers and provided with feather keys or
equivalent device by which they share the rotary motion of the said shaft h. It will
be readily seen from this construction that the shaft h is the driving shaft to the
barrels b and c and that the shaft a is rotated therefrom by the spur wheel i and
pinion j..
་
When requiring to drive the two barrels together in the direction for simultaneously
winding in the warps or ropes, we throw each of the pinions g and g¹ into gear with
the barrel spur wheels ff respectively. When requiring to wind with one barrel
only, say the barrel b, whilst the barrel c is at rest, we brake or secure the barrel c
and throw the pinion g' out of gear and thus on the revolution of the shaft h only
the barrel b will move. To allow both barrels to unwind together or at different rates
of speed under the tension of the ropes, we throw out the pinions g and g¹ thus
disconnecting the barrels, the speed of rotation being regulated by means of the
brakes b¹ and c¹.
In the modified arrangement shown in Fig. 3 the spur wheels ff are cast, keyed,
or bolted to the flanges of the barrels b and c in a reverse position to that
shown in Fig. 1 so as to bring them close together; and instead of placing the
spur wheel i to one side of the barrels, we sometimes mount it centrally between the
barrels b and c as shown in Fig. 4.
We prefer the arrangement shown in Figs. 1 and 3 for this reason: In case of one
of the toothed wheels ff or pinions g g giving way we could couple or bolt the
barrels b and c together at XX and drive the winch through the remaining wheel
and pinion till the vessel arrived in port for repair and furthermore we prefer the
construction shown in Fig. 1 because the strains between the shafts a and h are
transmitted near to the winch side.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :-
.A double barrelled winch characterized by driving mechanism by which the barrels
are driven from pinions adjustably mounted on a driving or second motion shaft for
gearing into spur wheels secured to the barrels substantially as and for the purpose as
herein before described with reference to the accompanying drawing.
Dated thin 10th
1007
Dated this 10th day of May 1007.
. G. F. MARKSON,
Chartered Patent Agent, Stockton-on-Tees, Agent for the Applicants.