CERTAIN IMPROVEMENTS IN WINDLASSES OR MACHINERY FOR WINDING UP THE CABLE, WHICH WE DENOMINATE TYZACK, DOBINSON, AND COMPANY'S COMPOUND LEVER WINDLASS
Year: 1832

page_text: TYZACK, DOBINSON, AND ROBINSON'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, BEN-
JAMIN COWLE TYZACK and THOMAS STORER DOBINSON, of North Shields, in
the County of Northumberland, Chain and Anchor Manufacturers, and
JOHN ROBINSON, of the same place, Engineer, send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
in and by His Letters Patent under the Great Seal of Great Britain, bearing
date at Westminster, the Third day of August, in the third year of His reign,
did, for Himself, His heirs and successors, give and grant unto us, the said
Benjamin Cowle, Tyzack, Thomas Storer Dobinson, and John Robinson, our
exors, admors, and assigns, His especial licence, full power, sole privilege
and authority, that we, the. said Benjamin Cowle Tyzack, Thomas Storer
Dobinson, and John Robinson, our exors, adññors, and assigns, and every of
them, by ourselves or themselves, or by our or their deputy or deputies,
servants or agents, or such others as we, the said Benjamin Cowle Tyzack,.
Thomas Storer. Dobinson, and John Robinson, our exors, admors, or assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter, during the term of years therein expressed, should and law-
fully might make, use, exercise, and vend, within England, Wales, and the
Town of Berwick-upon-Tweed, our Invention of "CERTAIN IMPROVEMENTS IN
WINDLASSES OR MACHINERY FOR WINDING UP THE CABLE, WHICH WE DENOMINATE
TYZACK, DOBINSON, AND COMPANY'S COMPOUND LEVER WINDLASS;" in which said
Letters Patent is contained a proviso, obliging us, the said Benjamin Cowle

page_text: Tyzack, Thomas Storer Dobinson, and John Robinson, by an instrument in
writing under our hands and seals, or the hand and seal of one of us, particularly
to describe and ascertain the nature of our said Invention, and in what manner
the same is to be performed, and to cause the same to be inrolled in His
said Majesty's High Court of Chancery within two calendar months next and
immediately after the date of the said in part recited Letters Patent, as in
and by the same, reference being thereunto had, will more fully and at large
appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Benjamin Cowle Tyzack, Thomas Storer Dobinson, and John Robinson, do
hereby declare the nature of our said Invention to consist in certain machi-
nery applied to or connected with the windlass of ships and other vessels in
such manner as enables us to apply the power of a lever for the purpose of
turning a windlass with more effect and with less loss of time than heretofore;
and in further compliance with the said proviso, we, the said Benjamin
Cowle Tyzack, Thomas Storer Dobinson, and John Robinson, do hereby
describe the mauner in which our said Invention is to be performed, by the
following description thereof, reference being had to the Drawing annexed, and
to the figures and letters respectively marked thereon (that is to say):-
DESCRIPTION OF THE DRAWING.
Figure 1 is a perspective view of a ship's windlass, fitted with our said
improvements at each end, or in other words, at both the starboard and
larboard side; and it should here be stated, that we consider this the most
complete way of fitting the windlass, though our improvements may be fitted
to one end or side of the windlass with very good effect. A is the ordinary
paul bit; B, the ordinary paul; C, the ordinary toothed paul wheel; and
D, D, the barrel of the windlass, the axes of which turn as usual in the bit
head K, K; so far this description is applicable to an ordinary windlass. And
we will now proceed to describe our said improvements; L is another toothed
paul wheel, fastened at the end of the barrel of the windlass, where what are
called garrack wheels are sometimes placed; and the part coloured pink is
what we call a paul box, and with its pauls complete; a creeper for it has
pauls fitted within it to act upon the toothed paul wheel L, as better explained
in Figure 2; which figure it will be more convenient to explain now; and we
will finish the explanation of Figure 1 hereafter. Figure 2 represents the
paul box, with one side, which we call the cover, and is shewn separately at
Figure 3 removed, to show the action of the pauls which are within it; upon
the toothed paul wheel L, it will be observed that the sides of this paul wheel

page_text: instead of rising above the teeth, as in the ordinary paul wheel C, form in fact
à smaller circle below the teeth, as shewn at M. Now, on this circle or boss,
the sides of the paul box which are screwed together to form the box, fit and
turn easily, so that when the end' N of the paul box or creeper is depressed,
the pauls a, e, r, drop down into a fresh set of teeth, for the paul wheel is
of course fixed to and remains stationary with the windlass barrel. If, after
the end N has been depressed, it be again raised, the pauls a, e, r, in the box
will act against the teeth of the paul wheel L, and force the barrel of the
windlass round in the direction of the arrow. The only thing which remains
to be explained, is the mode of raising and depressing the end of the creeper;
and this is effected by means of cranks and levers, shown in Figure 1, which
Figure we will now finish the description of. G, G, is a bar or axis, which we
call the main or warping shaft, passing through and thus taking a centre
bearing in the paul bit A, and resting at each end on a bearing in the bit head;
At each end of this bar is a double arm socket, as shown at H; and these sockets
receive four levers with handles, 3 of which at J, J, J, are shewn in their
places, the fourth being supposed to be temporarily removed. F is a short arm
or lever, projecting from the warping shaft, and connected by means of the
rod E, to the end N of the creeper; and it will be easily seen that by this
arrangement, and a similar one at the other end of the windlass, if the levers
J, J, J, are worked up and down by manual or other power; the windlass will
be driven round with great force at every up stroke of the creeper. Figure 4
is a separate view of one of the double arm sockets, drawn to a larger scale;
and Figure 5 is a plan of one of the handle levers, drawn to the same scale.
It is only necessary further to state, that if it be required to give a continuous
motion to the windlass, it will only be necessary to place the warping shaft at
an angle with the windlass barrel, and let the short arms or levers F project
from opposite sides of the warping shaft, as shewn in plan at Figure 6.
Now, whereas, we claim as our Invention the creeper here shown and
coloured pink, moving on and round the side bosses M of the paul wheel L,
forcing round the windlass barrel by means of the pauls within it, and con-
nected with a compound lever for the purpose of giving increased power to its
action, whether the said creeper be applied to the ends of the windlass barrel,
as here shown, or to the centre, or any other part that may be found more
convenient.
And such our Invention being to the best of our knowledge and belief
entirely new, and never before used within that part of His said Majesty's
United Kingdom of Great Britain and Ireland called England, His Dominion
of Wales, or Town of Berwick-upon-Tweed, we do hereby declare this to be

page_text: our Specification of the same, and that we do verily believe this our said
Specification doth comply in all respects fully and without reserve or dis-
guise with the proviso in the said herein-before in part recited Letters
Patent contained; wherefore we do hereby claim to maintain exclusive right
and privilege to our said Invention.
In witness whereof, we, the said Benjamin Cowle Tyzack and Thomas
Storer Dobinson, have hereunto set our hands and seals, the Twenty-.
first day of September, One thousand eight hundred and thirty-two.
ΠΟΥ
nat purpose.
Inrolled the Third day of October, in the year of our Lord One thou-
sand eight hundred and thirty-two.