IMPROVEMENTS IN STEAM PILE-DRIVING APPARATUS
Year: 1872

page_text: LETTERS PATENT to William Sissons and Peter Patrick White, both*
of the Town or Borough of Kingston-upon-Hull, in the County of
the same Town or Borough, Engineers, for the Invention of "IM--
PROVISIONAL SPECIFICATION left by the said William Sissons and.
Peter Patrick White at the Office of the Commissioners of Patents,
with their Petition, on the 25th June 1872.
:
We, WILLIAM SISSONS and PETER PATRICK WHITE, both of the Town
or Borough of Kingston-upon-Hull, in the County of the same Town or
Borough, Engineers, do hereby declare the nature of the said Invention .
for "IMPROVEMENTS IN STEAM PILE-DRIVING APPARATUS," to be as follows:-
:
Our Invention has for its object the adaptation and application to
steam pile drivers of an improved catch for the ram, by means of which
the ordinary tendency of the catch to get out of order by the striking of.
the ram, and its uncertainty of operation by failing to catch the travelling:
chain, are obviated. For this purpose the ordinary sliding bolt for:
•

page_text: connecting the ram with the travelling chain, and disconnecting it as
required, is pushed into the open link of the chain by means of a cord
acting on the axle of a toothed pinion, which is thereby caused to work
in a rack formed in the bolt, the bolt being withdrawn as required by
the motion of the pinion in a contrary direction.
This arrangement of a pinion and rack applied to the sliding bolt of
the ram is in substitution for the ordinary excentric for working the
bolt; and the axle of the pinion is acted upon as required by means of a
lever in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 1
filed by the said William Sissons and Peter Patrick White in the
Great Seal Patent Office on the 23rd December 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
SISSONS and PETER PATRICK WHITE, both of the Town or Borough of
Kingston-upon-Hull, in the County of the same Town or Borough, 1
Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of June, in the year of
our Lord One thousand cight hundred and seventy-two, in the thirty-fifth
year of Her reign, did, for Herself, Her heirs and successors, give and 2
grant unto us, the said William Sissons and Peter Patrick White, Her
special licence that we, the said William Sissons and Peter Patrick White,
our executors, administrators, and assigns, or such others as we, the said
William Sissons and Peter Patrick White, our executors, administrators,
and assigns, should at any time agree with, and no others, from time to 2
time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM PILE-DRIVING
APPARATUS," upon the condition (amongst others) that we, the said 3
William Sissons and Peter Patrick White, our executors or adminis-.
trators, by an instrument in writing under our, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to

page_text: 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 we, the said William Sissons and Peter Patrick
White, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, reference being had to
the Drawing hereunto annexed, and to the letters and figures marked
thercon (that is to say) :-
Our Invention has for its object the adaptation and application to
steam pile drivers of an improved catch for the ram, by means of which
the ordinary tendency of the catch to get out of order by the striking of
the ram, and its uncertainty of operation by failing to catch the travelling
chain, are obviated. For this purpose the ordinary sliding bolt for
connecting the ram with the travelling chain, and disconnecting it as
required, is pushed into the open link of the chain by means of a cord
acting on the axle of a toothed pinion, which is thereby caused to work
in a rack formed in the bolt, the bolt being withdrawn as required by
the motion of the pinion in a contrary direction.
This arrangement of a pinion and rack applied to the sliding bolt of
the ram is in substitution for the ordinary excentric for working the
bolt, and the axle of the pinion is acted upon as required by means of a
lever in the ordinary manner.
Having thus stated the nature of the said Invention, we will proceed
to describe more particularly in what manner the same is to be performed
by the aid of the accompanying Drawings, in which Fig. 1 is an elevation
of the ram, and Fig. 2 is a vertical section of the same.
A (Fig. 2) is the ordinary sliding bolt for connecting the ram with the
travelling endless chain, and disconnecting it as required. The bolt A is
forced into the open link of the chain at B by means of a toothed pinion C
working in the rack D formed in the sliding bolt A fitted in a cell in
the centre of the ram. The axle E, on which the pinion C is fixed, pro-
jects beyond the side of the ram, and has fitted on it a lever F, to one
end of which a cord G is fixed, which cord, on being drawn downwards,
causes the axle E and the pinion C to turn and force the bolt A into the
open link of the chain, by the upward movement of which the ram is
lifted to the required height. On the end of the lever F opposite to

page_text: that to which the cord G is fixed, coming in contact will the fixed
staple H (during the upward course of the chain) the axle E and pinion C
are turned in the opposite direction to their former movement, thereby
withdrawing the bolt A from its connection with the chain, and releasing
the bolt.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, we hereby declare that what we
claim as of our Invention is, the adaptation and application to pile
driving apparatus of the improved catch for the ram represented and
described, consisting of a toothed pinion and rack for working the 1
ordinary sliding bolt as required, in substitution for the excentric or other
mcans hitherto used for the same purpose.
In witness whereof, we, the said William Sissons and Peter Patrick
White, have hereunto set our hands and seals, the Twenty-first
day of December, in the year of our Lord One thousand eight 1
hundred and seventy-two.
Witness,
WILLIAM ALBERT SISSONS.
WILLIAM SISSONS.
PETER PATRICK WHITE.
(L.S.)
(L.S.).