AN IMPROVEMENT IN WHELPS FOR THE BARRELS OF CAPSTANS, WINDLASSES, AND OTHER MACHINERY
Year: 1854

page_text: LETTERS PATENT to John Isaiah Grylls, 8, Murton Street, Sunderland,
for the Invention of "AN IMPROVEMENT IN WHELPS FOR THE BARRELS OF
CAPSTANS, WINDLASSES, AND OTHER MACHINERY."
Sealed the 23rd June 1854, and dated the 3rd January 1854.
PROVISIONAL SPECIFICATION left by the said John Isaiah Grylls at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
January 1854.
I, JOHN ISAIAH GRYLLS, 3 Murton Street, Sunderland, do hereby declare
the nature of the said Invention for "AN IMPROVEMENT IN WHELPS FOR THE
BARRELS OF CAPSTANS, WINDLASSES, AND OTHER MACHINERY" to be as follows:-
In the construction of whelps it was formerly usual for the working surface
to be formed of a hollow curve, one part being higher or at a greater distance
from the centre of the barrel than the other; but of modern time whelps have
been made and extensively used, the more projecting part of each of which has
been composed of an inclined plane. Now my present improvement consists
of forming such projecting part (the part where the chain first comes against
and down which it slides) with a hollow between the two inclined sides, by
which the more projecting part of a whelp will consist of two inclines with a
hollow between them, in place of as heretofore that intervening space con-
sisting of a bearing surface equally prominent with the outer edges of the
whelp.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Isaiah Grylls in the Great Seal Patent Office on the
3rd July 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ISAIAH GRYLLS, 2, Murton Street, Sunderland, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of January, in the year of our Lord One
thousand eight hundred and fifty-four, in the seventeenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Isaiah Grylls, Her special licence that I, the said John Isaiah Grylls,
my executors, administrators, and assigns, or such others as I, the said John
Isaiah Grylls, my executors,-administrators,-and-assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use, exer-
'cise, and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for AN IMPROVEMENT IN
WHELPS FOR THE BARRELS OF CAPSTANS, WINDLASSES, AND OTHER MACHINERY,"
upon the condition (amongst others) that I, the said John Isaiali Grylls, by an
instrument in writing under my hand and seal, should particularly describe
and ascertain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal Patent
'Office within six calendar months next and immediately after the date of the
said Letters Patent.
NOW KNOW YE, that I, the said John Isaiah Grylls, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):
In the construction of whelps it was formerly usual for the working surface
to be formed of a hollow curve, one part being higher or at a greater distance
from the centre of the barrel than the other; but of modern time whelps have
been made and extensively used, the more projecting part of each of which has
been composed of an inclined plane: Now my present improvement consists
of forming such projecting part (the part where the chain first comes against
and down which it slides), with a hollow between the two inclined sides by
"which the more projecting part of a whelp will consist of two inclines, with a
'hollow between them, in place of as heretofore that intervening space, con-
sisting of a bearing surface equally prominent with the outer edges of the
whelp.

page_text: Having thus stated the nature of my Invention, I will now proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
..Figure 1 shows, a front_view, partly in section; and Figure 2, a plan in
section, of a capstan barrel having whelps applied thereto constructed
according to iny Invention. Figure 3 shows several views of my improved
whelp separately; and it will be seen on examining the Drawing that the
more projecting part a of the whelp is formed by the two projecting inclined
sides a¹, a', having a cavity or hollow part between them, within which the
curved part of a link of chain cable will slide, whilst the sides of the adjoining
links will bear upon the inclined sides a¹, a¹, which are placed at such an angle
on the capstan or other barrel as will ensure the correct fleeting of the chain
with which it is intended to work.
The rim of the capstan is formed with a series of projecting. whelps b¹,
each with a cavity, and they are affixed at a distance apart to obtain spaces to
hold the links of the cable or chain.
I would here remark that I have only thought it necessary to show my
improvement applied to a capstan barrel, as a workman acquainted with this
class of machinery will readily understand how to apply the same to the barrels
of windlasses and other machinery..
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the exact form of hollow or inclines a, a', herein described, so long as the
peculiar character of my Invention be retained; but what I claim is, the
forming whelps with hollows between the inclined sides, as herein described.
In witness whereof, I, the said John Isaiah Grylls, have hereunto set
my hand and seal, this Third day of July, in the year of our Lord One
thousand eight hundred and fifty-four.
Witness,
JNO. COOK,
12, Cursitor Street,
Chancery Lane.
JNO. I. GRYLLS. (L.S.)