AN IMPROVED CIRCULAR SAW MACHINE
Year: 1867

page_text: LETTERS PATENT to Alexander Horace Brandon, Civil Engineer, of 13,
Rue Gaillon, Paris, in the Empire of France, for the Invention of
"AN IMPROVED CIRCULAR SAW MACHINE."-A communication from Baxter
Doddridge Whitney, Engineer, of Winchendon, U. S. of America,
PROVISIONAL SPECIFICATION left by the said Alexander Horace Brandon
at the Office of the Commissioners of Patents, with his Pétition, on the
10th July 1867.
I, ALEXANDER HORACE BRANDON, Civil Engineer, of 13, Rue Gaillon,
Paris, in the Empire of France, do hereby declare the nature of the said
Invention for "AN IMPROVED CIRCULAR SAW MACHINE," to be as follows:-
These improvements have reference to a machine containing two circular
saws, either of which can be brought to bear on the wood or other material
operated on. For this purpose I attach each saw on the extremity of a shaft
in the usual manner. I mount one of these shafts in bearings adapted to the
extremities of two parallel levers kept at a proper distance apart by a hollow
sleeve connecting them at their centre, and I mount the other shaft in
bearings adapted to the other extremities of these levers. I pass the

page_text: sleeve with its levers, shafts, and saws on a stationary shaft or bolt at such
a distance below the table of the machine that the upper saw projects to
the required extent. I fit a small pulley in a corresponding position on
both of these shafts, so that the driving strap will always drive the upper
one whilst the lower one will remain stationary; thus by turning this
apparatus on the stationary bolt I can bring either one of the saws into
work.
In order to saw wood or other material at an angle with a vertical line
I place on the table on one side of the saw, and parallel with the same, a
tilting guide plate attached to a swivel capable of being inclined and set at
any angle varying from ninety to forty-five degrees with a horizontal line, and
in order to saw wood or any other material at any given angle with the length
of the stuff I fix on the other side of the saw a guide plate turning horizontally
and capable of being set at any angle with the saw, and I make that part
of the table on which this guide is mounted detached from the stationary
one, although flush with the same, and I adapt this moveable table on ways
or slides so as to run it with the guide and the wood to be cut towards
the saw.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alexander Horace Brandon in the Great Seal Patent Office
on the 10th January 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
HORACE BRANDON, Civil Engineer, of No. 13, Rue Gaillon, Paris, in the
Empire of France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of July, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirty-first year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the
said Alexander Horace Brandon, Her special licence that I, the said Alex-
ander Horace Brandon, my executors, administrators, and assigns, or such
others as I, the said Alexander Horace Brandon, my executors, adminis-
trators, 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
Mau, an Invention for "AN IMPROVED CIRCULAR SAW MACHINE," being..a

page_text: communication to me from Baxter Doddridge Whitney, Engineer, of Win-
chendon, United States of America, upon the condition (amongst others)
that I, the said Alexander Horace Brandon, my executors or adminstrators,
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 Alexander Horace Brandon, do
hereby declare the nature of the 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 thereon (that is to
say) :-
.
These improvements have reference to a machine provided with two
rotating circular saws, either of which can be brought to bear on the wood.
or other material to be operated upon. For this purpose I mount each saw
on the extremity of a shaft in the usual manner, and one of these shafts
is mounted in bearings adapted to the extremities of two parallel levers kept
at a proper distance apart by a hollow sleeve shaft connecting them at
their centre; the other shaft is mounted in bearings adapted to the other.
extremities of these levers. The sleeve shaft with its levers, shafts, and saws
is mounted on a stationary shaft or bolt at such a distance below the
table of the machine that the upper saw projects to the required extent. A
small pulley is mounted on each of these saw shafts, so that the driving
strap will always drive the upper one whilst the lower one will remain
stationary; thus by rocking or turning this apparatus on the stationary shaft
as its centre of motion either one of the saws can be brought into work.
1
In order to saw wood or other material at an angle with a vertical line I
place on the table on one side of the saw, and parallel with the same, a tilting
guide plate or fence attached to a swivel so that it is capable of being inclined
and set at any angle varying from ninety to forty-five degrees with a horizontal
line, and in order to saw wood or any other material at any given angle with
the length of the stuff I fix on the other side of the saw another guide plate
or fence. which is capable of turning horizontally, and of being set at any
angle with the saw, and that part of the table on which this guide is mounted.
is made moveable and detached from the stationary table, although the
surfaces of both tables are flush with each other. The nioveable table is

page_text: mounted on ways or slides so as to admit of moving it with the guide and the
wood to be cut towards the saw.
In the accompanying Drawing Fig. 1 is a plan of the machine; Fig. 2 is
a front elevation; and Fig. 3 a side elevation.
a, a, is the framing of the machine; b, the table; f is a fast saw fitted on
a shaft, and 9 is a second saw fitted on a shaft g¹; these two shafts f
and g turn in bearings placed at the extremities of the arms h and i,
which are united by a sleeve j keyed to a shaft k carried in bearings k¹
and. In order to bring one or other of these saws into action the shaft k
can be turned on its axis by means of the worm gearing into the wheel m
on the extremity of the shaft k. A pulley o and o¹ is keyed on each of the
saw spindles f and g', and a strap n rotates that pulley and saw which
is uppermost, and as the strap itself receives motion from a pulley placed
below, and of a larger diameter than the pullies o, o¹, it follows that
it cannot come in contract with the lower pulley o¹. On the table 6 are
two guides or fences p and q, one on either side of the saw, the one on
the right side p serves to guide the wood in an inclined position towards
the saw, and for this purpose the guide or fence can assume any angle
or inclination between a vertical line and forty-five degrees. A set screw r
serves to hold the fence p at any required angle by being screwed in the
sector 8. In order to bring the guide or fence closer to or further from
the saw it is provided with a tail piece t, which is moveable in a slide u, in
which it may be secured at any point by a screw v. The left-hand guide q
is capable of turning on a central bolt p', and can be set and secured at any
angle by means of the clamping screw p*; this guide is fitted on a small
table 6' adjusted at the same level as the fixed table b, and travels in fixed
guides and 63; the wood to be cut is placed in contact with this guide or
fence, the moveable table b¹ being previously run out as shown in dotted lines
in Fig. 1, and in this position the table together with the wood are pushed
towards and against the saw f.
Having thus explained the nature of the Invention which has been com-
municated to me from abroad, and having explained the manner of putting
the same into practice, I claim as the Invention secured to me by Letters
Patent as aforesaid,-
Firstly, the construction and arrangement of parts herein set forth, or any
mere modification thereof, by means of which two circular saws can be so
arranged that either can be brought successively into operation.
Secondly, the arrangement and construction of the guide or fence p for
directing the timber in an inclined or tilted position towards the saw.

page_text: And, thirdly, the arrangement and construction of the guide or fence q with
the table 6' for guiding the timber in an angular direction towards the saw.
In witness whereof, I, the said Alexander Horace Brandon, have
hereunto set my hand and seal; the Seventh day of January, in the
year of our Lord One thousand eight hundred and sixty-eight.
A. H. BRANDON. (L.S.)