A GREAT IMPROVE- MENT IN THE CONSTRUCTION AND PRINCIPLE OF VALVE WATERCOCKS
Year: 1785

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ROTHWELL, of the Parish of Saint Paul, Shadwell, in the County of Middlesex,
Gentleman, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date
the Nineteenth day of November, in the twenty-sixth year of His reign,
give and grant unto me, the said John Rothwell, His especial licence that
I, the said John Rothwell, during the term of years therein expressed,
should and lawfully might, use, exercise, and vend, within England, Wales,
and the Town of Berwick-upon-Tweed, my Invention of "A GREAT IMPROVE-
MENT IN THE CONSTRUCTION AND PRINCIPLE OF VALVE WATERCOCKS;" in which
said Letters Patent there is contained a proviso obliging me, the said John
Rothwell, under my hand and seal, to cause a particular description of
the nature of my said Invention, and how the same is to be performed, to
be inrolled in His Majestie's High Court of Chancery within one calendar
month after the date of the said recited Letters Patent, as in and by the
same, relation being thereunto had, may more fully and at large appear.

page_text: NOW KNOW YE, that in complince with the said proviso, I, the said
John Rothwell, do hereby declare that my said Invention is described in the
Plan and description thereof hereunto annexed.
In witness whereof, I, the said John Rothwell, have hereunto set my
hand and seal, this Twenty-eighth day of November, One thousand
seven hundred and eighty-five.

page_text: The dead - plate of Vulve.
The bolt which screws the dead plate and Leather to the Valve ..
hole truly
The Leather which lines the Guard plate and lays on the Shoulder of the Spindle I covers, the opening u. h of Fig D._
The Guard plate piered at each end g. 9. for the end of the Eye - bolts n. n. to pass through T. in Fig. N. is a hole.
ground for the Spindle to act in
The Spindle & Vulve together with dead pluck of Leather scruv'd on. -
The Collar which belongs to the Spindle & acts on the Guard plate...
The forelock which connects Collur & Spindle together.
The two Eye bolts which holds down the
Suard plate...
The suve Notts stuck decus on the top of the Eep boths...
The
edge
of the Valve with Leather and dead plate screw'd on. -
The key which fixes on the Top of the Spindle for opening and shutting the Vulve....
The Section of the Cock with Vulve partly open.
Represents the inside end of the Cock or Valve Beil - it shows the Water -
an
a square
way
W. and the kim S. which the Valve shuts
against
also the Ears t. t projecting from the Rim which when put together forms part of the joint of the valve . -
Being screw'd together by the Bolts ffff. with the Tallow Cloth F between represents the external ports of the Cock D. with the
rds for communication d. d. and shews the studds at S. S. in Fig B. which receives the Eye bolts of confines the Guard plute
Lurrny opening on the upper side u. h for the reception of the Valve and Spindle II which Spindle passing through
the l'alve and by means of
-hole i, in the upper part of the valve - joint for the reception of i in Trg : H. which
auseth the said Valve (by means of the Key V.) to open or shut at pleasure: The Guard plate N being Screw'd on to Fig: D.
49.9 (with the Leather M between) by the Eype botts n. n. being loop'd on the Studds S.S. on Fig B. forces the whole Appa-
atus to its proper bearings and prevents any Water from passing through the joints of the Guard plate or Spindle. The
ollar P being fut
on the Spindle and the forelock p passing through the Spindle and the Collar in the foun of a titige
nnects them together and keeps the Shoulders of the Spindle up to its proper beaunes .
he said Cock consists of a hollow Box of Wood bast Iron Brass or other Metal of Square. (or other form having a pipe or
ipes proceeding from two sides there of at the one,
-pipe the Water enters and it issues at the other when wanted in order to
op the passage of the water within this hollow box I place a valve or vulves moveable on a a joint or Spindle which Spindle
es through the one side of the Box to the outside and is so fitted us to be water tight when it is necessary either to
give a free passage to the Water the Valve is opened and shut by the Spindle which is made to turn on its
of a Key or Wrench,
revent or
cis by
means
u