IMPROVEMENTS IN CAPSTANS AND IN THE MODE OF APPLYING STEAM POWER THERETO
Year: 1884

page_text: I HENRY JOHN CUBITT KEYMER of the Fisheries Iron Works, Gorleston in the
County of Suffolk Engineer do hereby declare the nature of my said Invention
for IMPROVEMENTS IN CAPSTANS AND IN THE MODE OF APPLYING STEAM POWER
THERETO to be as follows:—
My invention relates in the first place to the kind of capstan ordinarily used in
Scotch and other fishing vessels with grooved hauling rollers or pulleys hitherto
worked exclusively by hand power, and consists in the combination and arrange-
ment of parts hereinafter described in order to adapt such capstans for being
worked by steam power when required.
The main standard or pillar of the capstan is made of cylindrical form and
hollow with a broad flange at the bottom serving as a base plate to be fastened
down to the deck of the vessel and to carry a pawl and ratchet wheel to prevent
the return of the barrel or the rollers, which are fitted in an angle bracket fixed at
the top part of the capstan.
The said main standard or pillar being hollow will admit of its forming a trunk
through which works the connecting rod or rods from a piston or pistons in a
steam cylinder or cylinders fixed to the under side of the said base plate, such rod
or rods being caused to work a crank shaft suitably mounted at the top of the
capstan. On one end of this crank shaft is fixed a bevil pinion gearing with the
under side of a bevil ring on the top of the capstan, and gearing with the other
side of the said ring is a pinion mounted in the angle bracket which carries the
grooved hauling rollers which are thereby driven as required by the rollers being
suitably geared.
If desired the crank shaft may be worked by hand power instead of by steam by
applying a winch handle at one end of it.
When the capstan is designed for use in drift net boats trawlers and yachts and
without the grooved hauling rollers the usual warps or ropes are arranged so as to
wind on a capstan barrel fitted over the said hollow standard or pillar to the top
end of which barrel is fixed a bevil wieel gearing with a bevil pinion on the crank
shaft to be driven as before. For the purpose of giving differential speeds to the
barrel a second bevil pinion is fixed on the crank shaft nearer to the centre thereof
and there is a clutch arrangement by means of which either ono or other of the

page_text: pinions can be put in gear with the crank shaft. At a suitabló distance from the
centre of the capstan is another short spindle on which is keyed a bevil wheel
having the desired difference in the number of teeth and gearing into the second
pinion, also the said spindle has a pinion (of the same size and kind as the first
named pinion on the crank shaft) koyed on it and gearing with the larger bevil
wheel on the capstan barrel.
When the clutch on the crank shaft is put into gear with the said second named
pinion the required differential motion of the capstan barrel is thereby produced.
Each side of the capstan or each end of the crank shaft is supplied with gearing so
as to form a duplicate apparatus which serves also for driving the capstan barrel
in alternate directions if required. Each end of the shaft is also adapted for driving
by hand power.
In order to adapt the capstan for uso with wire ropes, suitable supports or
standards are applied in order to carry a 'fairleader or guide to preserve tho
evenness of winding of the warp on the barrel as it travels up and down, such
"fairleader" being worked by a double threaded out and screw driven from the
large wheel on the capstan barrel.
And again: especially for the use of wire warps or ropes, the barrel of the
capstan or winch is made of such external form as to constitute an arc of a circle
the centre of which is the part of the trawl warp rail of the fishing vessel round a
pin at which the warp is passed, by which means the coils of the warp are
rendered self "fairleading" as they are wound on the barrel and the capstan may
bo placed if desired horizontally, and a screw or other brake be used or attachod
thereto.

page_text: COMPLETE SPECIFICATION.
I HENRY JOHN CUBITT KEYMER of the Fisheries Ironworks, Gorleston in tho
County of Suffolk, Engineer do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN CAPSTANS AND IN THE MODE OF APPLYING STEAM POWER
THERETO and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
"
My invention relates in the first place to the kind of Capstan or net hauler
ordinarily used in Scotch and other Fishing vessels, consisting of grooved rollers or
pulloys hitherto worked exclusively by hand power and in the arrangement and
combination of parts hereinafter described in order to adapt such capstans for
being worked by steam power when required.
My Invention relates in the second place to the arrangement of the Steam
Engine to be contained within such capstans as are mostly used in English fishing
craft and are now being adopted by Scotch and other fishermen, so that by tho
arrangement and combination of parts hereinafter described, steam power is
rendered availablo for the purpose without the cost of separate Engines and tho
space occupied by the same."
And my Invention relates in the third place to the combination of both the
Scotch net hauler and the English Capstan in one machine to be worked by either
steam power or hand as required by the arrangement and combination of parts
hereinafter described.
In order that my said Invention may be fully understood I will proceed to
describe more particularly in what manner the same is to be performed by the aid
of the accompanying drawings, in which are represented the parts of mechanism or

page_text: vessel, the top side of which plate or flange where marked a. a. represents a ratchet
wheel and a pawl working in the bottom of the barrel B' at b. which takes into
the said ratchet wheel a. a and stops the back lash of the barrel B'. The said main
standard or pillar a. being hollow admits of its forming a trunk through which
works the connecting rod or rods from the piston or pistons in a steam cylinder or
cylinders marked E fixed to the under side of the said base plate a. such rod or
rods being caused to work a crank shaft F suitably mounted at the top of the main
standard or pillar a. On one end of this crank shaft F is fixed a spur pinion G
gearing with the spur wheel H. fixed on the top spindle I working in suitable
bearings J. J. the said bearings J. J. being arms of the capstain top A¹. Upon the
opposite end of the spindle I is fixed another pinion K, gearing with the wheel L
working loosely between the collar M on the crank shaft F and bearing N.-Tho
pinion O and wheel L are cast or fastened together and working loose on the crank
shaft F when made to revolve by pinion K will cause the wheel D attached to the
barrel B' and the rollers C¹ C₁ C, Fig: 2 if applied to the capstan top A¹, to
revolve likewise.
In order to reduce the possible friction, ball rollers P P. in semi-circular grooved
rings are provided to sustain the weight, and the rollers R are fitted so as to
be capable of receiving the circumferential strains of the barrel B'.
When the capstan is required to be worked by hand, the wheel H is shifted on
the spindle I out of gear with the pinion G, and by means of squaro eyed hand
levers placed on the ends of the spindle I, the Engine is left still whilst the
barrel B' is made to revolve as required. The said spindle I may also be connected
by means of a clutch fixed on either crank shaft F or spindle I, such clutch
fitting over a feather, and the wheel or pinion when disconnected from the said
clutch will be loose upon the shaft or spindle.-The bracket attachment_Fig. 1
and 2 are protected from slipping or being drawn off the capstan top A', by a
small flange projecting from the underside thereof and marked V which projects
into a corresponding groove in the bracket A. When the hauling rollers or pulley
attachment figures 1 and 2 are not required, the sides of the Capstan top A¹ are
brought close down to the wheel D to act as a guard to the teeth of the same.
T represents a counter balanco fly wheel to assist in starting the engine, and also
to assist regularity or speed and is affixed to the crank shaft F.
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
I-claim is
First. The application of steam power to the net haulers substantially as
described with reference to Figures 1 and 2.
Secondly. The application of the hollow capstan spindle or main standard to
form the Engine trunk substantially as described.
And lastly. The arrangement for reducing the friction round tho main standard,
the regulation of the speed of the barrel and the method of attaching the net
hauler (Figures 1 and 2) to the capstan top substantially as described.
:
Dated this 27th day of February 1885.
W. SPENCE & SON,
Agents for the said Henry John Cubitt Keymer.