IMPROVEMENTS BRENG
Year: 1853

page_text: LETTERS PATENT to Richard Dryburgh, of Leith, in the County of
Edinburgh, Scotland, Cooper, for the Invention of "IMPROVEMENTS
BRENG ...
Sealed the 9th January 1854, and dated the 11th November 1853.
PROVISIONAL SPECIFICATION left by the said Richard Dryburgh.
at the Office of the Commissioners of Patents, with his Petition,
on the 11th November 1853.
I, RICHARD DRYBURGH, of Leith, in the County of Edinburgh,
Scotland, Cooper, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MEANS OF HOLDING STAVES WHILE BEING CUT"
to be as follows:-
My Invention consists in the use of an instrument or holder which
may be called a cramp, by which the staves may be held at the
required angle while they are being operated upon by the saw in such
a manner as to shape them for casks and other uses to which staves
are or may be applied. This instrument or holder consists of a metallic
plate, one side of which is inclined to the other, and bent to about a
right angle thereto, the inclined and bent side having pointed teeth¨¨

page_text: formed upon it. The instrument is secured to a piece of wood in such
a manner that the inclined row of teeth may point upwards. On this
piece of wood or slide the stave is carried forward, so as to be brought
in contact with the ordinary circular saw, and operated upon thereby.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Dryburgh in the Great Seal Patent
Office on the 2nd May 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
RICHARD DRYBURGH, of Leith, in the County of Edinburgh, Scotland,
Cooper, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of November, in the
year of our Lord One thousand eight hundred and fifty-three, in the
seventeenth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Richard Dryburgh, Her
special license that I, the said Richard Dryburgh, my executors, admi-
nistrators, and assigns, or such others as I, the said Richard Dryburgh,
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 THE MEANS OF HOLDING STAVES WHILE BEING CUT,"
upon the condition (amongst others) that I, the said Richard Dryburgh,
by an instrument in writing under my hand and seal, should par-
ticularly 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 Richard Dryburgh, 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

page_text: by the following statement, reference being had to the Drawing
hereunto annexed, and to the letters and figures marked thereon (that
is to say):
My Invention of "Improvements in the Means of Holding Staves
while being Cut" is intended to increase the steadiness of direction
with which staves may be kept presented to the teeth of a circular
saw, so that they may be thereby cut into their required shapes. And
the means by which this object is accomplished consists of an instru-
ment or holder, which may be called a cramp, formed with teeth
projecting at different distances from the face of a metal plate, screwed
to the slide on which the stave is to be carried forward to be operated
upon by the saw. By the mode in which the projections of the ends
of the teeth are varied the angle at which the edge of the stave is
presented to the teeth of the saw is regulated. But my Invention
is not confined to the arrangement of such projections so as to be
adapted to any particular angle of direction required for the stave:
In order, however, that my Invention may be fully understood,
I will proceed to describe, by the aid of the accompanying Drawing, a
mode by which it may be readily carried into effect.
Fig. 1, is an elevation; Fig, 2, is an edge view; and Fig. 3, a plan
or horizontal view of the instrument or holder which may be screwed
to a piece of wood or slide, and the latter may be made to slide past
the teeth of a circular saw set in operation in any convenient manner.
The instrument or holder consists of a plate of iron a, with the side or
edge bent so as to stand upwards or outwards when the plate is
screwed to the slide. On this edge bare formed teeth or projections c
of any suitable shape and side, and sufficiently sharp at their points
to be capable of retaining the stave in its required position when placed
thereon, and while it is being operated upon by the saw.
The side or
edge is bent, so that the line of the points of the teeth or pro-
jections c may give a corresponding angle of inclination to the stave
resting thereon, whether such angle be the same as is represented in
the Drawing or any other that may be required.
The mode in which this instrument may be used is as follows:-
The slide, with the instrument screwed to it, may be placed upon a

page_text: bench on which or connected with which is a circular saw suitably
mounted. A stave is then placed upon the instrument, and being held
in its position by the points of the teeth or projections c, as the slide is
moved along the bench, the teeth of the circular saw may be made to
operate upon the stave at the required angle.
I would here remark that the stave might be held in its required
position by merely inserting nails or spikes of suitably varying lengths
in the slide or stave carrier itself, so as to hold the stave at the required
angle of inclination on the points of such nails or spikes, but I prefer
the use of the instrument above described.
Having thus described the nature of my Invention, and in what
manner the same is to be performed, I would have it understood that I
do not mean or intend to confine myself to the precise. forms of the
parts of the instrument or holder shewn and described, nor to the com-
bination therewith of a bench, as described, or any particular means of
carrying the stave forward. But what I claim as of my Invention is,
the use of an instrument or holder with teeth or projections upon it,
by means of which staves may be suitably held while being presented
to the teeth of a circular saw, as described.
In witness whereof, I, the said Richard Dryburgh, have hereunto
set my hand and seal, this Tenth day of March, in the year of
our Lord One thousand eight hundred and fifty-four.
Witness,
FRANCIS MURPHY.
RICHARD DRYBURGH. (L.S.)