IMPROVEMENTS IN MACHINERY FOR CUTTING SHIVES, BUNGS, CORKS, SPILES, AND VENT OR OTHER PEGS
Year: 1868

page_text: LETTERS PATENT to John Briggs, of 93, Downham Road, Kingsland
Road, in the County of Middlesex, Engineer, for the Invention of
"IMPROVEMENTS IN MACHINERY FOR CUTTING SHIVES, BUNGS, CORKS, SPILES,
AND VENT OR OTHER PEGS."
Sealed the 5th February 1869, and dated the 18th August 1868.
PROVISIONAL SPECIFICATION left by the said John Briggs at the
Office of the Commissioners of Patents, with his Petition, on the
18th August 1868.
I, JOHN BRIGGS, of 93, Downham Road, Kingsland Road, in the
County of Middlesex, Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN MACHINERY FOR CUTTING SHIVES, BUNGS,
CORKS, SPILES, AND VENT OR OTHER PEGS," to be as follows:-
These improvements refer to machinery for which a Patent was
granted unto George Redrup, under date of the 24th of June 1859,
No. 1520.

page_text: the same constructed in such a manner that the machines comprise the
following three moveable parts which are made to slide lengthways or
up and down according as the machines are made horizontal or vertical,
namely, firstly, the central spindle, secondly, the outer or cutter spindle,
and thirdly, the back centre or head against which the material to be
operated upon rests or is held. I, on the contrary, simplify the machines in
the following manner, that I make only two of the moveable parts referred
to sliding, namely, the central spindle and the back centre, while I make
the cutter spindle in such a manner as only to be allowed to revolve but
not slide lengthways or up and down, and I do this by any suitable
means, such as by turning down journals in the cutter spindle. I thus
dispense with a set or sets of rods, levers, and weights for that purpose.
I also in the case of the vertical machines prefer to apply the weight
necessary to bring the centre spindle down directly on the top of said
centre spindle, thus dispensing with another set or sets of rods and
levers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Briggs in the Great Seal Patent Office on
the 6th February 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
BRIGGS, of 93, Downham Road, Kingsland Road, in the County of
Middlesex, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of August, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Briggs, Her special licence that I,
the said John Briggs, my executors, administrators, and assigns, or
such others as I, the said John Briggs, 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, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY FOR CUTTING

page_text: SHIVES, BUNGS, CORKS, SPILES, AND VENT OR OTHER PEGS," upon the condition
(amongst others) that I, the said John Briggs, my executors or
administrators, by an instrument in writing under my, 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
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 Briggs, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement:-
The improvements refer to machinery wherefor a Patent was granted
unto George Redrup, under date of Twenty-fourth of June, One thousand
eight hundred and fifty-nine, No. 1520.
Now whereas the said Patent Specification claims and particularly
describes said machinery with reference to the Drawings accompanying
the same in such a manner that the machines comprise the following
three moveable parts which are made to slide lengthways or up and down
according as the machines are made horizontal or vertical, namely,
firstly, the central spindle, secondly, the outer or cutter spindle, and
thirdly, the back centre or head against which the material to be
operated upon rests or is held. I, on the contrary, simplify the machines
in the following manner, that I make only two of the moveable parts.
referred to sliding, namely, the central spindle and the back centre,,
while I make the cutter spindle in such a manner as only to be allowed.
to revolve but not slide sideways or up and down. I thus dispense with
a set or sets of rods, levers, and weights for that purpose. I also in
the case of the vertical machines prefer to apply the weight necessary to.
bring the centre spindle down directly on the top of said centre spindle,
thus dispensing with another set of rods and levers..
Figure 1 represents part plan, and Figure 2, elevation, partially
in section of a shive-cutting machine containing the above-named
improvements.
The carriage A has a spindle B containing fast and loose pulleys N,N',
and running in bearings C, C, on each side of which the said spindle B is
formed with collars or shoulders as shewn, and carrying at one projecting

page_text: end a chuck E in which the cutters F are fastened by means of set screws
as shewn. The spindle B is hollow and contains an inner central
spindle D point-shaped at the cutter end, and close to that point provided
with a conical disc G free to revolve on it though not slide lengthways,
while the other end of it has an eye and a corresponding pin which joins
it to a lever H by preference as shewn, having its fulcrum below the
spindle D, and the other end of which is bent round and passes under
the bed of the carriage and has an adjustable weight I. Directly opposite
the cutter spindle B and on the same bed as the carriage A I fix
another carriage K containing a boss with a spindle Lin the same central
line as the spindles B and D freely sliding in said boss, at one end next
the cutters provided with a block of wood J and at the other end with an
eye and a corresponding pin which joins it to a lever M, having its
fulcrum by preference, as shewn, on the further side from the operator
and fixed to the carriage and working in a horizontal plane or nearly
80. This lever which is of convenient length and leverage is shewn
broken off and not of its full length. As will be observed the wood
block J is without any points or similar means for holding the bung
by being pressed into the same as hitherto constructed, which arrange-
ment necessitated the employment of means for forcing the bung off
these points when finished. Experiment has shewn that the friction
between the wood to be operated upon and the wood block J produced by
the point of the central spindle D pressing them against each other is
sufficient to resist the tendency of the wood operated upon to turn with
the cutters. In consequence I have been able to simplify the machine
accordingly as shewn. The bung immediately on being finished is forced
out from between the cutters by the weight I on the lever H operating
upon the spindle D. By this improvement all chance of the bung
catching against the cutters when cut is entirely removed, while I am
enabled to do away with one of the sliding spindles. The remaining two
sliding motions I arrange as shewn, namely, as consisting of the inner
spindle and the back centre or its spindle. The machine is suitably
modified when intended for cutting corks or pegs, and in the vertical
machines I prefer to apply the weight necessary to bring the centre
spindle down directly on the top of the same.
די

page_text: as my Invention the simplification and improvement of the machines
with reference to the number and arrangement of sliding movements
employed as described and illustrated by the accompanying Drawings.
In witness whereof, I, the said John Briggs, have hereunto set my
hand and seal, this Sixth day of February, in the year of our
Lord One thousand eight hundred and sixty-nine.