AN IMPROVED DERRICK, FOR THE PURPOSE OF MORE EXPEDITIOUSLY, WITH LESS LABOR AND AT A LESS EXPENCE THAN HERETOFORE, LOADING AND UNLOADING SHIPS AND VESSELS, REMOVING HEAVY BODIES IN ANY DIRECTION, AND WHICH IS ALSO APPLICABLE TO OTHER USEFUL PURPOSES
Year: 1803

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
KENTISH, of Baker Street North, Portman Square, in the County of
Middlesex, Esquire, send greeting.
WHEREAS His present most Excellent Majesty King George the Third,
in and. by His Letters Patent,, under His Great Seal of the United
Kingdom of Great Britain and Ireland, bearing date at Westminster, the
Twenty-ninth day of July; in the forty-third year of His reign, for
Himself, His: heirs and: successors, did give and grant unto me, the said
Thomas Kentish, my, executors, administrators, and assigns, His especial
licence,. full power, sole privilege and, authority, that I, the said Thomas
Kentish, my. executors, administrators, and assigns, and every of them, by
myself' and themselves, or by my and their deputy or deputies, servants or
agents, or, such others as I,,the said Thomas Kentish, my executors, adminis
trators; 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 lawfully: might make, use, exercise, and vend, within that part of
His said Majesty's United Kingdom called England, His Dominion of Wales,
and Town of Berwick-upon-Tweed, and also in all His said Majesty's Colonies
and Plantations abroad, my Invention of "AN IMPROVED DERRICK, FOR THE
PURPOSE OF MORE EXPEDITIOUSLY, WITH LESS LABOR AND AT A LESS EXPENCE THAN
HERETOFORE, LOADING AND UNLOADING SHIPS AND VESSELS, REMOVING HEAVY BODIES
IN ANY DIRECTION, AND WHICH IS ALSO APPLICABLE TO OTHER USEFUL PURPOSES;" in
in which said Letters Patent there is contained a proviso obliging me, the
said Thomas Kentish, by an instrument in writing under my hand and seal,

page_text: particularly to describe and ascertain the nature of my said Invention, and in
what manner the same is to be performed, and to cause the same to be in-
rolled in His said Majesty's High Court of Chancery within one calendar
month next and immediately after the date of the said recited Letters Patent,
as in and by the same, relation being thereunto had, will more fully and at
large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Kentish, do hereby describe and ascertain the nature of my said
Invention, and the manner in which the same is to be performed, by the
Drawings in the margin of these Presents, and as follows, that is to say :-
In Figure 1, A represents the derrick; B, the purchase wheel; C, the
axletree; D, four plates of iron to support the wheel; E, an iron cap, for the
two plates of D to fasten with an iron bolt; G, a roller to take the rope off
the wheel B; H, the handles; I, four plates of iron to support the roller;
K, a brake wheel; L, a lever to press on the wheel K, to lower the weight
down; M, a ratched wheel and paul to stop the roller from going back when
hoisting up the weight; O, a ship's mast or a post in the ground on shore, to
keep the derrick with a guy; P, the guy; R, a shieve to keep the rope
extended; S, a hook to draw the weight; T, the step for the derrick; V,
two thwart guys; U, a lever to direct the purchase wheel B and axletree C to
keep its level. To fix the derrick for use on board a ship or other vessel, the
step should be secured so near to the gunwhale as to allow room for the
handles to work; and the head should be secured to the main yard when topped
up to plum the step, or to the head of the mainmast, as occasion may require.
To fix the derrick for use on shore, a strong oak post, of about fifteen inches
diameter, more or less, in proportion to the weight to be raised, should be well
secured about six feet in the earth, with spur shores, and the derrick affixed to
it in the same manner as to the mainmast on board ship. By the derrick
thus constructed and fixed, a considerable deal of labour will be saved, and the
removal of heavy bodies in any direction very much facilitated.
Figure 2, the roller detached, for the purpose of shewing its form and con-
struction, it being different from the roller hitherto used for this purpose.
In witness whereof, I, the said Thomas Kentish, have hereunto set my
hand and seal, this Twenty-sixth day of August, in the forty-third
year of the reign of our Sovereign Lord George the Third, by the
grace of God of the United Kingdom of Great Britain and Ireland
King, Defender of the Faith, and in the year of our Lord One
thousand eight hundred and three.
THO KENTISH. (LS.)

page_text: AND BE IT REMEMBERED, that the same Twenty-sixth day of August,
in the year above mentioned, the aforesaid Thomas Kentish came before our
Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained, in form above written.
And also the Specification aforesaid was stamped according to the tenor of the
Statute in that case made and provided.
Inrolled the same Twenty-sixth day of August, in the year above
written.