Improvements in Steam Trawl Winches and the like.
Year: 1897

page_text: Date of Application, 11th May, 1897-Accepted, 3rd July, 1897.
COMPLETE SPECIFICATION.
Improvements in Steam Trawl Winches and the like.
We, HARRY REYNOLDS CHAPMAN and ERNEST THEODORE WHITE, both of the
Victoria Works, Gateshead-on-Tyne, in the County of Durham, Engineers, 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:
Barrels of steam trawl winches as ordinarily constructed are liable to injury
under the lateral strain to which their flanges are subjected when the space
between them is filled or nearly filled and there is a heavy pull on the warp.
Now this invention is designed to obviate or mitigate the said disadvantage and
to enable barrels to be readily and economically produced which whilst superior in
strength to ordinary cast iron or even cast steel winch barrels may be of equal
capacity and capable of being as conveniently worked. For this purpose the
improved barrels are constructed as hereinafter described and illustrated of a
novel arrangement in combination of certain parts made of cast steel and certain
parts made of wrought steel plate, these being constructed, arranged and fastened
together as will be understood from the following description, reference being had
to the accompanying illustrative drawings in which Fig. 1 shows a sectional plan
of apparatus comprising a couple of barrels placed on the shaft employed to carry
them together with clutches for effecting the necessary engagement and disengage-
ment. Figs. 2 and 3 are elevations of the right hand end of each barrel respectively
showing the form of the clutch casting on the one barrel and the brake sheave
casting on the other.
A and B indicate generally the two barrels cach of which comprises a couple of
wrought steel plate flanges, a couple of end steel castings, and a steel tube or ring.
The flanges are marked C1 C2 C3 C4; they are of substantial wrought steel plates
(for example say from a half inch to an inch and a quarter in thickness, more or
less) such as are used in the construction of boilers, which plates are pressed to the
required size & shape (whilst sufficiently hot) by hydraulic pressure the outer
circular edge of each plate being flanged outward with the view of obviating
liability to buckling and producing a barrel flange of great strength well adapted
to resist the strains to which it is liable to be subjected. The tubes or
rings K and K2 are also of steel plates these plates being (whilst sufficiently hot)
rolled to the form of a tube of the required diameter and then welded at the joint
as well understood.
As the drawing shews, the end castings marked D' D E F form the necessary,
clutch and break sheave portions of the barrels as well as the bosses for carrying,
them on their shaft.
The casting E is made with that portion that is intended to carry the central
clutch of square or polygonal cross section thus obviating the necessity for keys
for this clutch as well as for the end clutches on the main shaft.
The steel plates and castings are securely rivetted or bolted together as repre-
sented in the drawing and are mounted on the shaft with brass bushed bearings in
the usual manner.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. The hereinabove described improved construction of barrel comprising pressed
steel flanges, a wrought steel tube or ring, and end castings constructed combined
and arranged substantially as described and illustrated for the purpose specified.
2. The construction in the manner described of the combined apparatus illus-
trated for the purpose specified.
Dated this 11th day of May 1897.
For the Applicants,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.