Improvements in Winches for Use on Board Ship.
Year: 1893

page_text: Date of Application, 1st Aug., 1893
Complete Specification Left, 1st May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Winches for Use on Board Ship.
We JAMES JACKSON ARROWSMITH and PETER SINCLAIR of 6 Denbigh Street
Liverpool in the County of Lancaster, Engineers and Co-partners, do hereby
declare the nature of this invention to be as follows:-
The object is to provide for use on board ship, a compact simple, durable and
efficient reversible winch, more especially fitted to be actuated by steam power
and having all the parts readily accessible for renewal and repair.
A winch under our invention consists essentially of a bed plate fitted with
standards adapted to carry a main shaft, a counter shaft, and the operating
cylinders. The main shaft is provided with a winding barrel and warping ends
and with a wheel gearing with a pinion on the counter shaft. The counter shaft
is provided at its ends outside the standards with discs and crank pins which latter
are coupled to the connecting rods of the motive power cylinders and pistons.
On the counter shaft within the standards are excentrics for giving motion to the
valve gear. The excentrics are made with externally threaded sleeves and fit
freely on the shaft. Nuts free to move longitudinally on the shaft gear with the
threaded sleeves and are coupled together so as to move simultaneously longi-
tudinally on the said shaft and be free to rotate therewith. The nuts rotate with
the countershaft and carry with them the excentrics which according to the
longitudinal position of the nuts on the shaft operate the valve gear so as to cause
the engines to move in one direction or the other or to be at rest. Longitudinal
motion is given to the nuts by means of a lever or other suitable mechanism.
1000
We JAMES JACKSON ARROWSMITII and PETER SINCLAIR of 6 Denbigh
Street Liverpool in the County of Lancaster, Engineers and Co-partners, 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 :-
The object is to provide for use on board ship a compact, simple, durable and
efficient reversible winch, more especially fitted to be actuated by steam power,
and having all the parts readily accessible for renewal and repair.
A winch under our invention consists essentially of a bed plate fitted with
standards adapted to carry a main shaft, a counter shaft, and the operating
cylinders. The main shaft is provided with a winding barrel and warping ends,
and with a wheel gearing with a pinion on the countershaft. The countershaft
is provided at its ends outside the standards with discs and crank pins which
latter are coupled to the connecting rods of the motive power cylinders and
pistons. On the countershaft within the standards are excentrics for giving motion
to the valve gear.
The excentrics are made with externally threaded sleeves
and fit freely on the shaft. Nuts free to move longitudinally on the shaft gear
Price Bl

page_text: with the threaded sleeves and are coupled together so as to move simultaneously
longitudinally on the said shaft and be free to rotate therewith. The nuts rotate
with the countershaft and carry with them the excentrics which according to the
longitudinal position of the nuts on the shaft operate the valve gear so as to cause
the engines to move in one direction or the other, or to be at rest. Longitudinal
motion is given to the nuts by means of a lever or other suitable mechanism.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a front elevation and Fig. a side view of a winch constructed according
to our invention to be operated preferably by steam. a is the bed plate. b standards
carrying a main shaft e in bearings d. a countershaft e in bearings f. and the
operating cylinders g. h winding barrel on the mainshaft. warping ends.
ispur wheel gearing with a pinion on the countershaft. crank discs and pins
on the countershaft e." 1. rods connecting the crank pins to the piston rods of the
operating cylinders g. Additional countershafts and gearing may be used if
increased purchase is desired. m. are excentrics on the shafte for giving motion
to the valves of the cylinders 7. The excentrics m are formed with or attached to
threaded sleeves n and are free to partially rotate on the shaft e o are nuts
gearing into the threaded sleeves n and free to be moved longitudinally on the
shafte but caused to rotate therewith by the feather keys p. The excentrics m
by means of the threaded sleeves n are caused to rotate with the nuts o and
shafts e and thereby give motion to the valves. When the nuts o are moved along
the shaft e they partially rotate the excentrics m and according as the nuts are at
one end or other, or midway of their travel so are the excentrics turned into the
proper position for causing the engines to revolve forwards or backwards, or to
remain stationary. 7 are loose collars surrounding the nuts o. rrod for connecting
the collars so that they may both move together. s lever and connections for
giving motion to the rod r so as to move the collars y and with them the nuts o
along the shaft e. It will be obvious that the excentrics m might have internal
threaded sleeves to gear with external threads on the nuts o if so desired and that
various arrangements of mechanism for giving motion to the nuts o might be used
without departing from our invention.
By the above construction a compact and durable winch is obtained, easily
accessible for cleaning and repair and with simple and efficient reversing gear.
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 :-
Winches with parts arranged substantially as herein described.
Dated this 30th day of April 1894.
J. T. KING,
Agent.