Improvements in Crank-windlasses.
Year: 1892

page_text: Date of Application, 15th Oct., 1892-Accepted, 7th Jan., 1893
COMPLETE SPECIFICATION.
Improvements in Crank-windlasses.
I, FRANK STEAD MANTON, of No. 105 Prospect Street, in the City of Providence,
in the County of Providence, and State of Rhode Island, United States of America,
Mechanical Engineer, do hereby declare the nature of my invention and in what
manner the same is to be performed, to be particularly described and ascertained.in
and by the following statement :-
This invention has reference to improvements in crank-windlasses.
The object of this invention is to provide a crank-windlass with means for dis-
connecting the barrel from the mechanism by which the same is rotated to allow the
barrel to be reversely rotated by the paying out of the cable.
The further object of the invention is to produce a crank-windlass which will be
more substantial in construction and more convenient in operation than those as
heretofore constructed.
The invention consists in the peculiar construction of the windlass and the com-
bination therewith and with the operating-mechanism of a device for disconnecting
the windlass-barrel from such mechanism.
Figure 1 represents a half vertical-section and half side-view of the improved
windlass.
Figure 2 represents a top view of the barrel and the operating-mechanism con-
tained therein, the windlass-head being removed.
Figure 3 represents an enlarged view of portions of the head and barrel, part of
the head being broken away to show the pawl lifted by the pawl-tripper, the annular-
ratchet with which this pawl engages being indicated in dotted lines.
Similar numbers of reference designate corresponding parts throughout.
In the drawings 5 indicates the base of the windlass which is provided with the
inner strengthening-braces 6-6 extending radially from a substantial axial sleeve
or hub 7, the base is furnished with bolt-holes through which the bolts for securing
it to the deck are passed and at its upper portion has an outer annular-ratchet 8 the
inner side-wall of which is carried upward sufficiently to form a protecting-lip 9,—
in the bore of the hub 7 is rigidly secured the vertical-shaft 10.
The windlass-barrel 11 has the series of inner strengthening-ribs 12 and 13, the
ribs 12 converging towards the center to meet the sleeve 14 which is provided with
the hardened bearing 15 journaled on the slight enlargement 16 of the shaft 10,
while the ribs marked 13 join the sleeve 17 having a hardened metal-bearing 18
journaled on the enlargement 19 of the shaft 10, the barrel 11 being thus
independently journaled on the shaft 10,-at the upper end of this barrel is formed
an inner annular-ratchet 20 and an internal-gear 21.
Keyed to the shaft 10 immediately above the enlargement 19 is a substantial
cross-plate 22 at the outer ends of which are secured short vertical shafts 23-23 on
which are journaled the intermediate-pinions 24-24 each having a hardened metal-
bearing these intermediate pinions engage with the internal-gear 21 of the barrel
and with the central pinion-gear 25 loosely mounted on the shaft 10 above the
cross-plate 22 and having an enlarged-flange 26 in which is formed the annular-
ratchet 27.
;
Journaled on the shaft 10 above the central-pinion 25 is a gear-plate 28 having a
hardened metal-bearing 29; this gear-plate has the gear 30 formed on its upper
surface and is provided near its central portion with the vertically-movable
pawls 31 adapted to engage the ratchet 27, while extending from its circumference
is an arm 32 carrying a vertically-movable pawl 33 adapted to engage the
ratchet 20 in the upper edge of the barrel, the lower end of this pawl is beveled, as
is shown in Figure 3 of the drawings, and pivoted to the lower surface of the gear-
plate 28 is a pawl-tripper 34 the handle portion of which extends beyond the outer

page_text: surface of the barrel, by means of this tripper the pawi 33 may be held in the
raised position shown in Figure 1 and out of engagement with the ratchet 20.
The windlass-head 35 is keyed on the upper end of the shaft 10 and in the walls
are formed the horizontal-bearings 36 in which the shafts 37 are journaled, the
inner ends of these shafts being journaled in sockets of a central hub and the outer
ends of the shafts being shaped to be engaged by the hubs of the crank-handles 38.
On the internal portions of the shafts 37 are keyed the bevel-gears 39-39 which
are adapted to engage the gear 30 and, when rotated, to revolve the gear-
plate 28.
The steps of the ratchets 20 and 27 extend in opposite directions and it is,
therefore, obvious that when the pawl 33 is dropped to engage the ratchet 20, the
rotation of the gears 39 by means of the crank-handles will be transmitted to the
barrel 11 through the pawls 33 and ratchet 20 the pawls 31 then merely sliding
over the steps of the ratchet 27,-when, however, the pawls 33 are raised, the
barrel 11 can only be revolved by reversing the movement of the cranks, the
capstan thus being under complete control while the cable may be payed out by
the backward movement of the barrel when the pawls 11', pivoted to the lower
portion thereof, are raised from engagement with the outer ratchet 8 of the base.
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:
Claim 1. In a crank-windlass having an internal driving-mechanism contained
within the upper portion of the barrel and the head, the combination with an
annular-ratchet in the barrel and a pawl adapted to engage therein, of a pawl-
tripper for raising the pawl out of engagement with the ratchet, as described.
2. In a crank-windlass, the combination with a substantial base adapted to be
secured to a deck and having an annular-ratchet, a vertical-shaft rigidly secured in
an axial-hub in. said base, a windlass-head keyed to the upper end of the shaft,
horizontal-shafts journaled in said windlass-head and carrying gears, and a gear-
plate journaled on the vertical shaft and carrying a vertically-movable pawl and a
lever for lifting the same, of a barrel journaled on the vertical-shaft intermediate
the base and the head and having an aunular ratchet in the upper portion adapted
to be engaged by the vertically-movable pawl, and pivoted pawls at the lower
portion to engage the ratchet of the base.
3. The combination with the base 5 having the annular-ratchet 8, a shaft 10
secured in a central hub of the base, a barrel 11, having the pivoted-pawls 11',
journaled on said shaft and provided at the upper end with the ratchet 20 and
internal-gear 21, a cross-plate 22 keyed to the shaft 10 and carrying idle-pinions 23
engaging with the internal-gear 21, and a central-pinion 25 journaled on the shaft
above the cross-plate and having the annulai-ratchet 27, of the windlass-head 35
keyed to the upper end of the shaft 10, horizontal crank-shafts 37 journaled therein
and carrying gears 39, a gear-plate 28, journaled on the shaft 10, having the
gear 30 and provided with the pawls 31 and 33, and a pawl-tripper 34 adapted to
raise the pawl 33 from engagement with the ratchet 20, as and for the purpose
described.
Dated this 5th day of August A.D. 1892.
In presence of :-
FRANK STEAD MANTON.
HENRY J. MILLER.
Haseltine, Lake, & Co.,
45, Southampton Buildings, London, Agents for the Applicant.