IMPROVEMENTS IN MACHINERY FOR STOPPING AND LOWERING CABLES AND OTHER CHAINS
Year: 1852

page_text: LETTERS PATENT to WILLIAM ROBERTS, of Millwall, Poplar, Fore-
man to Messrs. Brown, Lenox, & Co, of Billiter Square, for the -
Invention of IMPROVEMENTS IN MACHINERY FOR STOPPING AND
LOWERING CABLES AND OTHER CHAINS'
”
Sealed the 15th December 1852, and dated the 18th October 1852.
COMPLETE SPECIFICATION filed by the said William Roberts at
the Office of the Commissioners of Patents. with his Petition and
Declaration, on the 18th October 1852, pursuant to the 9th
.section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
WILLIAM ROBERTS, of Millwall, Poplar, Foreman to Messieurs Brown,
Lenox, and Company, Billiter Square, send greeting.
WHEREAS 1, the said William Roberts, have on this Eighteenth
day of October. One thousand eight hundred and fifty-two, left at the
Office of the Commissioners of Patents for Inventions a petition and
declaration, praying Her most Excellent Majesty Queen Victoria, by
Her Royal Letters Patent, to give and grant unto me, the said William
Roberts, Her especial licence. full power, sole privilege, and authority

page_text: that I, the said William Roberts, my executors, administrators, and
assigns, or such others as I, the said William Roberts, my executors,
administrators, or assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term of four-
teen years from the date of such Letters Patent, may lawfully make,
use, exercise, and vend within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and the Isle of Man, my Invention
of "IMPROVEMENTS IN MACHINERY FOR STOPPING AND LOWERING CABLES
AND OTHER CHAINS."
AND WHEREAS 1, the said William Roberts, do, according to
the statute in such case made and provided, by this instrument or Com-
plete Specification in writing under my hand and seal, and the Drawing
hereunto annexed, particularly describe and ascertain the nature of
my said Invention, and in-what-manner the same is to be performed,
that is to say:
DESCRIPTION OF THE DRAWING.
Figure 1, shows an elevation of the apparatus, with 'one side re-
moved to shew the chocks or blocks C, C. Figure 2, is a plan of a
stopper to check or control chain cables or other chains when-running
out, or for holding on by the same, and may be placed in the bows
or on the decks of vessels or floors of other places.
These stoppers
are constructed by preference of wrought iron, though cast iron or
other metal may be used, and each consists of a bed or box A, con-
taining moveable chocks C, moving on horizontal axes, and jaws or
nippers B, B, moving horizontally on vertical axes: these are closed
or opened simultaneously with the rising or falling of the vertical
chocks, at pleasure, by means of a spindle or shaft moved by 'a
lever. When the chocks move forward, and the jaws are closed, the
chain is held firmly in its place between the jaws; and when the jaws
are opened, and the chocks move backwards, the chain is released,
and it can be instantaneously or gradually brought up, as may be
desirable. Figure 4, is an end view.
arrangement of parts fitted as a deck
section through the centre of Figure 5.
Figure 5, is a plan of the same
pipe stopper; and Figure 6, is a
Figure 7, is a view of the jaw

page_text: or nipper B; and Figure 8, is a view of the chock or block C, shewn
separately. F, is a guard to prevent the chain from flying out of the
stopper when running quickly.
Having thus described the nature of my Invention, and the manner
of performing the same, I would have it understood that what I claim
is, the mode herein shewn and described of constructing and combining
parts for stopping and lowering cables and other chains.
In witness whereof I, the said William Roberts, have hereunto
set my hand and seal, this Twelfth day of October, in the year
of our Land One thousand sighe