Improvements in Steam Winches.
Year: 1893

page_text: Date of Application, 23rd Sept., 1893
Complete Specification Lelt, 22nd June, 1894-Accepted, 28th July, 1894
HYDINAL DI MITIGATION.
Improvements in Steam Winches.
I, JOHN CRAN of Leith in the County of Mid-Lothian, Engineer, do hereby
declare the nature of this invention to be as follows :-
:―
This invention relates to improvements in steam winches and under it the
apparatus or mechanism is so arranged that the engine only operates in the act of
hoisting when the winch is used in loading or discharging cargo or in the act of
warping the ship the chain barrel being loose upon its spindle both in the act
of lowering cargo and in warping.
.
The chain barrel, has at one end a conical cavity to receive a friction cone keyed
to the shaft and connected to a handing wheel which is threaded onto a screw made
on the said shaft. The crank shaft connected with the engine pistons is geared
with the main shaft of the winch by spur wheels or equivalent gearing and the end
of the barrel which has the friction cone in conjunction with it is encircled by a
brake strap operated by a treadle or other lever.
When it is desired to hoist with the winch the handing wheel is turned upon the
screwed part of the main spindle so as to force the cone into frictional contact with
the chain barrel and the engines being set in motion the barrel is rotated. In
lowering, the handing wheel is turned upon the screwed part of the spindle so as
to withdraw the cone from contact with the barrel which is thereby rendered loose
its motion being controlled by the brake strap before referred to.
When the winch is used for warping purposes the chain barrel is also rendered
loose on the strap by withdrawing the friction cone from contact with it.
Under a modification the handing wheel instead of being upon the main spindle
of the winch may be on an independent spindle carried by one of the end frames
and having the extremity opposite to that upon which the spindle is keyed screwed
and past through a nut carried in the jawed end of a lever which at its other end is
centred upon the framing and at a point intermediate is connected to the friction
cone.
Under another modification a series of friction plates or dises may be substituted
for the friction cone these being alternately keyed to the chain barrel and to the
main spindle of the winch in suchwise that by operating the handing wheel threaded
on the said spindle frictional contact between the alternate discs or plates is made
or released as desired.
Thatod h 90.1 1 1009
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Steam Winches.
I, JOHN CRAN, of Leith, in the County of Mid-Lothian, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be
O performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in steam winches and under it the
apparatus or mechanism is so arranged that the engine only operates in the act of
ID 071

page_text: hoisting when the winch is used in loading or discharging cargo or in the act of
warping the ship, the chain barrel being loose upon its spindle.
The invention is illustrated by the accompanying drawings, Figure I being a
sectional plan of the improved winch, Figure 2 a horizontal section of part of the
winch under a modification and Figure 3 a like view of a further modification.
As shewn by Figure 1 the chain barrel A has at one end a conical cavity to
receive a friction cone B keyed to the shaft C and connected to a handing wheel D
which is threaded on to a screw E made on the said shaft. The crank shaft F
connected with the engine pistons is geared with the main shaft C of the winch by
spur wheels G, H, or equivalent gearing and the end of the barrel which has the
friction cone B in conjunction with it is encircled by a brake strap I operated by a
treadle or other lever J.
When it is desired to hoist with the winch the handing wheel D is turned upon
the screwed part of the main spindle C so as to force the cone B into frictional
contact with the chain barrel A and the engines being set in motion the barrel is
rotated. In lowering, the handing wheel B is turned upon the screwed part of the
spindle C so as to withdraw the cone B from contact with the barrel which is.
thereby rendered loose its motion being controlled by the brake strap I before
referred to.
When the winch is used for warping purposes the chain barrel is rendered loose
on the strap in the same manner.
Under the modification illustrated at Figure 2 the banding wheel D instead of
being upon the main spindle C of the winch may be on an independent spindle K
carried by one of the end frames and having the extremity opposite to that upon
which the handing wheel is keyed screwed and passed through a nut L carried in
the jawed end of a lever M which at its other end is centred upon the framing and
at a point intermediate is connected to the friction cone B.
Under the modification illustrated at Figure 3 a series of friction plates or
discs N may be substituted for the friction cone these being alternately keyed to
the chain barrel A and to the main spindle C of the winch in suchwise that by
operating the banding wheel D threaded on the said spindle frictional contact
between the alternate discs or plates is made or released as desired.
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 :-
―:
%
A steam winch having the chain barrel loose upon its spindle and actuated
therefrom through a friction cone or plates substantially as described with reference
to the annexed drawings.
Dated this 21st day of June 1894.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.