Year: 1887

page_text: Date of Application, 29th Apr., 1887
Complete Left, 30th Jan., 1888
Complete Accepted, 2nd Mar., 1888
I, WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Mechanical Engineer, do hereby declare the nature of this invention to be as
follows
-
This invention consists of a new or improved windlass for ships.
Upon a shaft driven by a steam engine or other convenient means I fix an endless
worin which gears into a worm wheel mounted upon a vertical or capstan spindle;
this spindle also carries a worm which gears into a worm wheel upon a horizontal or
windlass spindle. The windlass spindle carries chain cable-holders and is supported by
bearings in the usual way.
Attached to the vertical spindle is a clutch or a set of pawls arranged to drop into
recesses in the engine worm wheel so that when rotating the vertical spindle by hand
through a capstan drum head the windlass can be worked independently of the
engine.
The worm upon the vertical spindle 1 make of small diameter but with strong teeth
of a coarse pitch, this causes an end thrust upon the windlass spindle but I counter-
act this by placing friction rollers to bear upon the, sides of the windlass worm
wheel.
The rotation of the engine drives the worm wheel upon the vertical or capstan
spindle and also the coarse pitch worm upon it, this in turn drives the windlass worm
wheel at a much slower speed but with a proportionately greater power.
The vertical or capstan shaft can be arranged to carry a capstan body for warping
ropes and also a drum head for capstan bars to be worked by hand in the usual way;
and this in combination with a steam or other engine with worm and worn wheel
forms part of my invention.
801 1
1007
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: I, WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the City of
London, Mechanical Engineer, do hereby declare the nature of this invention and in
what manner the same is to bo performed to be particularly described and ascertained
in and by the following statement:—
This invention consists of a new or improved windlass for ships.
Upon a shaft driven by a steam engine or other convenient means I fix an endless
worm which gears into a worm wheel mounted upon a vertical or capstan spindle;
this spindle also earries a worm which gears into a worm wheel upon a horizontal
or windlass spindle. The windlass spindle carries chain cable holders and is supported
by bearings in the usual way.
Attached to the vertical spindle is a clutch or a set of pawls arranged to drop into
recesses in the engine worm wheel so that when rotating the vertical spindle by
hand through a capstan drum-bead the windlass can be worked independently of the
engine.
The worm upon the vertical spindle I make of small diameter but with strong
teeth of a coarse pitch, this causes an end thrust upon the windlass spindle but
I counteract this by placing friction rollers to bear upon the sides of the windlass
worm wheel.
The rotation of the engine drives the worm wheel upon the vertical or capstan
spindle and also the coarse pitch worm upon it, this in turn drives the windlass
worm wheel at a much slower speed but with a proportionately greater power.
The vertical or capstan shaft can be arranged to carry a capstan body for warping
ropes and also a drum-head for capstan bars to be worked by hand in the usual
way and this in combination with a steam or other engine with worm and worm
-wheel forms part of my invention.
In order to enable my invention to be fully understood I will proceed to describe
how it can be carried into practice by reference to the accompanying drawings, in
which
Figure 1, sheet 1, is a side elevation of a steam windlass constructed according to
my invention, the vertical spindle and worm being arranged to be driven either by a
vertical engine or by a capstan.
Figure 2, sheet 2, is a sectional plan of the same the section being taken through
the vertical or capstan spindle.
Figure 3 is a side elevation.
Figure 4 an end elevation, and
Figure 5 a plan showing my improved steam windlass arranged to be driven either
by a horizontal engine or by crank handles.
Similar letters in all the figures indicate similar parts.
Referring to figures 1 and 2, a is the crank shaft of the steam engine to which is
fixed the endless worm b gearing into the worm wheel a mounted loosely upon the

page_text: capstan spindle d to which, however, it can be connected when required by dropping
a pawl e through a hole in the plate or boss d¹; the end of the pawl e fitting into a
recess in the upper face of the worm wheel c; is the worm carried by the spindle d
the said worm consisting of a single, double, or treble thread of coarse pitch which
gears into a worm wheel g fixed upon a windlass spindle h.
The cable may be taken to the windlass in any convenient manner but I prefer the
arrangement shown, by which the cable passes first under the chain wheel then
round, and is then conducted through a pipe in the side standard. In order to
counteract the side thrust upon the windlass spindle caused by the oblique action
of the teeth of the worm wheel I place upon each side rollers i, i revolving upon
pins j, j securely attached to the bed-plate of the windlass.
The capstan spindle d carries at its upper end a capstan warping body k and a
drum-head witli socket holes for capstan bars, and when steam is not available the
capstan can be rotated by hand in the usual manner, the windlass being driven by the
worm upon the capstan shaft; when working by hand the pawle which has an
inclined point slips over the recesses in the top of the wheel c and the engine remains
stationary, or the pawl e may be entirely removed.
The windlass illustrated in figures 3, 4, and 5 is similar to that hereinbefore
described with reference to figures 1 and 2 except that a horizontal engine is used for
driving the worm shaft a, and the hand power is applied by means of crank
handles m, m, actuating bevel gearing n connected with the vertical spindle d.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
1. claim is
1. The improved steam windlass substantially as hereinbefore described and
illustrated by figures 1 and 2, sheets 1 and 2 of the accompanying drawings.
2. The improved steam windlass substantially as herein before described and
illustrated by figures 3, 4, and 5, sheet 3, of the accompanying drawings.
3. The combination of two worms and two worm-wheels for the purpose of driving
a windlass substantially as hereinbefore described and illustrated in the drawings.
4. The combination of worm-wheel and coarse pitch worm driven with crank
handles and gearing for driving a windlass by hand substantially as described and
represented in figures 3, 4, and 5, sheet 3, of the accompanying drawings.
Dated the 30th day of January 1888.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.