Improvements in Windlasses.
Year: 1898

page_text: Date of Application, 16th Feb., 1898
Complete Specification Left, 29th Nov., 1898-Accepted, 11th Feb., 1899
Improvements in Windlasses.
I, JOHN BROKENSHIRE FURNEAUX, of Victoria Works, Gateshead, in the County
of Durham, Engineer, do hereby declare the nature of this invention to be as
follows:
A windlass according to this invention comprises a main shaft mounted in
suitable bearings and having keyed to it one or more suitably actuated spur
wheels each of which is formed with a series of laterally projecting clutch-teeth
adapted to engage with a correspondingly formed series of clutch-teeth upon
the opposite face of a cable lifter or holder (hereinafter referred to as a cable
lifter) that is capable of being moved endwise upon the main shaft and, when
the above mentioned clutch teeth are out of engagement. may be allowed to
rotate under the control of a brake so as to pay out cable. Through these clutch
teeth, which are of ratchet or zig-zag form with rounded corners the cable lifter
can be positively driven. For the purpose of enabling the cable lifter to be
moved into or out of engagement, the boss of the cable lifter is formed with a
flange which lies between the body of a nut fitted on a threaded portion of the
main shaft and a withdrawing ring attached to the nut by means of laterally
extending bolts passing through the outer edges of the ring.
By turning the nut in one direction it will be moved lengthwise along the
shaft so that the withdrawing ring will be brought into contact with the flange
on the hoss of the cable lifter and will carry the latter with it, thus disengaging
the clutch teeth, whilst, if the nut be turned in the other direction, it will come
against the boss of the cable lifter and force its clutch teeth into engagement
with those on the spur wheel. The shaft and nut are so threaded that if, whilst
cable is being paid out, the cable lifter should, owing to the vessel rolling or
otherwise, come into frictional contact with the nut or its withdrawing ring and
thus rotate it, the nut will be moved along the shaft away from the spur wheel
so that liability of inadvertent engagement of the clutch teeth whilst paying
out cable is obviated. The movement of the nut is limited by a check ring
keyed to the shaft and to lock the clutch teeth in their engaged position a pivoted
locking pawl or bar is dropped between this check ring and the nut. A suit-
able washer is provided between the nut and the boss of the cable lifter. The
brake for controlling the rotation of the latter is preferably a self-holding brake,
the stran of which encircles a sheave formed upon the cable lifter.
Windlasses according to this invention are usually made with two juxtaposed
spur wheels, two cable lifters arranged one on the outer side of each spur wheel
with a nut between each cable lifter and the adjacent end bearing of the
windlass shaft, the ends of which carry warping drums or heads.
Dotad this 10th love of Wah 1000

page_text: 'Improvements in Windlasses.
I, JOHN BROKENSHIRE FURNEAUX, of Victoria Works, Gateshead, in the County
of Durham, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and as-
certained in and by the following statement:-
This invention has reference to improvements in windlasses objects being to
enable the cable lifters or holders to be driven positively without rendering them
liable to become inadvertently engaged with the driving mechanism when paying
out cable. Fig. 1 of the accompanying drawings shows, partly in longitudinal
section and partly in elevation, a windlass according to this invention; it com-
prises a main shaft A mounted in suitable bearings B and having keyed to
it one or more suitably actuated spur wheels C each of which is formed with
a series of laterally projecting clutch-teeth adapted to engage with a correspond-
ingly formed series of clutch-teeth upon the opposite face of a cable lifter or
holder D (hereinafter referred to as a cable lifter) that is capable of being moved
endwise upon the main shaft A, and, when the above mentioned clutch teeth
are out of engagement, may be allowed to rotate under the control of a brake
so as to pay out cables.
The brake for controlling the rotation of the cable lifter is preferably a self-
holding brake, the strap of which encircles a sheave E formed upon the cable
lifter.
!
Through the clutch teeth, which are of ratchet or zig-zag form with rounded
corners as shown the cable lifter I can be positively driven. Fig. 2 is a face
view of a driving wheel C. For the purpose of enabling the cable lifter D to
be moved into or out of engagement, the boss of the cable lifter is formed with
a flange which lies between the body of a nut F fitted on a threaded portion of
the main shaft A and a withdrawing ring G, attached to the nut F by means
of laterally extending bolts passing through the outer edges of the ring G. The
nut G is preferably formed as a hand-wheel as shown. By turning the nut F
in one direction it will be moved lengthwise along the shaft A so that the with-
drawing ring G will be brought into contact with the flange on the boss of the
cable lifter D and will carry the latter with it, thus disengaging the clutch
teeth, whilst, if the nut F be turned in the other direction it will come against
the boss of the cable lifter D and force its clutch teeth into engagement with
those on the spur wheel C. The shaft A and nut F are so threaded that if,
whilst cable is being paid out, the cable lifter D should, owing to the vessel
rolling or otherwise, come into frictional contact with the nut F or its withdraw-
ing ring G and thus rotate it, the nut F will be moved along the shaft A
away from the spur wheel C so that liability of inadvertent engagement of the
clutch teeth whilst paying out cable is obviated.
The movement of the nut F is limited by a check ring H keyed to the shaft.A
and to lock the clutch teeth in their engaged position a pivoted locking pawl or
bar I, is dropped between this check ring H and the nut F. A suitable washer
Jis provided between the nut and the boss of the cable lifter.
Windlasses according to this invention are usually made with two juxtaposed
spur wheels C, two cable lifters D arranged one on the outer side of each spur
wheel C with a nut F between each cable lifter D and the adjacent end bearing B
of the windlass shaft A, the ends of which carry warping drums or heads K.

page_text: Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
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1. A windlass comprising a main shaft having keyed to it one or more driving
wheels each formed with lateral clutch teeth adapted to engage correspond-
ing clutch teeth upon the opposite face of cable lifter that
be moved endwise upon the shaft by means of a nut fitted on a
threaded portion of said shaft, the arrangement being such that each cable lifter
can be positively driven, and if, when allowed to rotate so as to pay out cable,
it should come into frictional contact with said nut, the nut will be screwed
along the shaft so as to tend to move the cable lifter further. from the driving
wheel substantially as and for the purpose specified.
2. A windlass constructed arranged and operating substantially as described
with reference to and shown in the accompanying drawings.
For the Applicant
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.