IMPROVEMENTS IN WINDLASSES FOR SHIPS
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said George Daniel Davis at the
Office of the Commissioners of Patents on the 16th December 1880.
GEORGE DANIEL DAVIS, of 669, Commercial Road, Stepney, Engineer.
"IMPROVEMENTS IN WINDLASSES FOR SHIPS."
These improvements in windlasses consist in the combination in one windlass or
double windlass of several old and known devices, the parts being respectively
single or double.
.
1st. The rocking lever in connection with the nipping pawl or ratchet and
pawl.
2nd. The cable holders arranged for different sizes of chain by the studs made
taper.
3rd. A taper cone for throwing the windlass in or out of gear, the cone being
worked by a nut on the main spindle working three or four claws, or an iron ring
fixed on the ends of four pins, the ring working round the shaft or working in a
groove or flange in connection with the cone throws the cone in and also draws it
out, and prevent the friction jamming the windlass.
4th. A break consisting of a hinged ring working accurately on the turned
groove of the barrel, and actuated by a lever by which the ship can ride on her
cable with greater control than by breaking by friction on cones as usual.
This friction break when in use does not prevent the windlass being used for any
purpose at the same time, the cones being drawn out of gear.
Warping ends are provided, but these form no part of the combination.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Daniel Davis in the Great Seal Patent Office on the 16th June
1881.
GEORGE DANIEL DAVIS, of 669, Commercial Road, Stepney, Engineer.
"IMPROVEMENTS IN WINDLASSES FOR SHIPS."*
These improvements in windlasses for ships consist in the combination in one
windlass or double windlass of several old and known devices, the parts being
respectively single or double.
1st. The rocking lever in connection with nipping pawl or ratchet and pawl,

page_text: 2nd. The cable holders arranged for different sizes of chains by the studs made
taper.
3rd. A taper cone for throwing the windlass in or out of gear, the cone being
worked by a nut on the main spindle working three or four claws, or by an iron
ring fixed on the ends of pins or working in a groove or flange in connection with
the cone, which throws the cone in and also draws it out, and prevents the friction
jamming the windlass.
4th. A break consisting of a hinged ring working accurately on the turned
groove of the barrel, and actuated by a lever by which the ship can ride on her
cable with greater control than by breaking by friction on cones as usual.
The friction break when in use does not prevent the windlass being used for any
purpose at the same time, the cones being drawn out of gear.
Warping ends are provided, but these form no part of the combination.
In the Drawings forming part of this Specification,-
Figure 1 shews part of the windlass in elevation, and partly in section.
Figure 2, the ring or flange with the holes for the pins.
Figure 3, the connection for the rocking lever with the pawl and windlass.
a is the driving shaft or main axle; b, the windlass barrel loose on shaft ;
c, brake wheel groove solid with windlass barrel with cone, on which works the
purchase wheel d with its inner or hollow cone; e, ring or flange of wrought iron
fixed by the pins e¹ and nuts to the screw nut e³, the ring may be replaced by
claws; fis the screw cut on a hollow shaft, and collar and handles keyed together
or solid in one piece with mortises f1 for pinching bars when more power is
required, rotating freely on the shaft; b¹ is. a projecting ring on and forming part
of the windlass barrel, behind which works the flange e; g is the pawl ring keyed
on the shaft; the purchase wheel d is keyed on the shaft at d¹.
In action the handles f by moving the screw ƒ bring the coned part d fixed on
the shaft and cone of the windlass barrel together, and the windlass barrel rotates
with the shaft; when separated by the reverse action of the screw (and it will be
observed that the withdrawal of the cone is equally positive), the windlass barrel
revolves.
The cable holders are not shewn in the Drawing, as they are of the usual
construction of taper studs, nor is the break ring and lever shewn, as they are of
the ordinary construction.
Having now described and particularly set forth the nature of the said Invention,
and the manner of carrying the same into effect, I would have it understood that
what I claim is,―
The use of a windlass consisting substantially of a combination of the four parts
specified, substantially as described.
In witness whereof, I, the said George Daniel Davis, have hereunto set my
hand and seal, this Fourteenth day of June, in the year of our Lord One
thousand eight hundred and eighty one.
G. D. DAVIS. (L.S.)