A NEW AND USEFUL MACHINE POR MAKING DOVETAILS
Year: 1855

page_text: LETTERS PATENT to Thomas Haley Burley, of the State of Ohio, of the
United States of America, for the Invention of "A NEW AND USEFUL
MACHINE POR MAKING DOVETAILS."
Sealed the 26th June 1855, and dated the 26th April 1855.
PROVISIONAL SPECIFICATION left by the said Thomas Haley Burley at
the Office of the Commissioners of Patents, with his Petition, on the
26th April 1855.
I, THOMAS HALEY BURLEY, of the State of Ohio, of the United States of
America, do hereby declare the nature of the said Invention for "A NEW AND
USEFUL MACHINE FOR MAKING DOVETAILS" to be as follows:-
Figure 1 is a top view of the machine; Figure 2, a detached view of the
saws, showing the inclined edges of the teeth; Figure 3 is an end elevation,
showing the chisels; Figure 4 is a detached view, showing the operation of
the saws a, a¹; Figure 5 shows the piece of wood before and after it is cut by
the chisels; Figure 6 is an enlarged view of the chisel; Figure 7 shows the
operation of the chisel cutting the piece of wood.
My Invention consists in giving obliquity to the cutting edges of the saws,
in combination with inclined fronting guides or tables, on which the pieces to
be mortised are to be brought up to the saws, and in arranging the series of

page_text: chisels with inclined cutting edges over a double inclined cutting bed or table,
for the purpose of dovetailing with facility and dispatch.
The inclined edges of the saw teeth are shown at a, a, there being two sets
of saws on the same shaft b, with their.. edges reversed, as shown in Figures
i and 2. There is a guage table with two inclined fronting guides c, c¹, cor-
responding to the two sets of saws a, a¹, so that, when the piece to be mortised
is laid on the guage table, and with it brought up parallel to the edges of the
saws a, they will cut obliquely into the. piece, as shown at d, Figures 4 and 5,
and also cut a straight edge e on the bottom of the mortise; then, by passing
the piece of wood to the guide c¹, the saws at a¹ cut obliquely on the other side
of the mortise, and thus complete it. The tenoning is performed as follows:-
The piece is slit to the required depth by the saw g, as shown in Figure 5; it
'is. then carried to the inclined table h, and passed under the set of chisels k,
and is held fast by the bar or hold fast (m), or in any of the ways common
to mortising machines. The chisels have two cutting edges at right angles to
each other, as shown at Figure 6, and they are inclined so as to be parallel
to the inclination of the table h. The chisels being brought down, cut one side
of the tenon or mortise (whichever it may be called), as shown in Figure 7.
The piece is now carried to the. inclined table h¹ on the other side, and the
reverse of table 'h, and the operation repeated to complete the mortise, the
sides and cutting edges of the set of chisels being the reverse of the set k
to complete the operation.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Haley Burley in the Great Seal Patent Office on
the 23rd October 1855.
4
1.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HALEY BURLEY, of the State of Ohio, of the United States of America, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of April, A.D. 1855, in the eighteenth
year of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Thomas Haley Burley, Her special license that I, the said
Thomas Haley Burley, my executors, administrators, and assigns, or such others
I, the said Thomas Haley Burley, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all

page_text: 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 of "A
NEW AND USEFUL MACHINE FOR MAKING DOVETAILS," upon the condition [amongst
others] that I, the said Thomas Haley Burley, 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 Thomas Haley Burley, 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 thereof (that is to say) :-
Of these Drawings, Figure 1 is a top view of the machine; Figure 2, a
detached view of the saws, showing the inclined edges of the teeth; Figure 3
is an end elevation, showing the chisels; Figure 4 is a detached view, showing
the operation of the saws a, a¹; Figure 5 shows the piece of wood before and
after it is cut by tho chisels; Figure 6 is an enlarged view of the chisel;
Figure 7 shows the operation of the chisel cutting the piece of wood.
My Invention consists in giving obliquity to the cutting edges of the saws,
in combination with inclined fronting guides or tables, on which the pieces to
be mortised are to be brought up to the saws, and in arranging the series of
chisels with inclined cutting edges over a double inclined cutting bed or table,
for the purpose of dovetailing with facility and dispatch. The inclined edges
of the saw teeth are shown at a, a¹, there being two sets of saws on the same
shaft b, with their edges reversed, as shown in Figures 1 and 2.
There is a
guage table with two inclined fronting guides c, c', corresponding to the two sets
of saws a, a', so that when the piece to be mortised is laid on the guage table, and
with it brought up parallel to the edges of the saws a, they will cut obliquely
into the piece, as shown at d, Figures 4 and 5, and also cut a straight edge e
on the bottom of the mortise; then, by passing the piece of wood to the
guide c, the saws at a¹ cut obliquely on the other side of the mortise, and thus
complete it.
The tenoning is performed as follows:-The piece is slit to the required depth
by the saw g, as shown in Figure 5; it is then carried to the inclined table h, and
passed under the set of chisels k, and is held fast by the bar or holdfast [m],
or in any other of the ways common to mortising machines. The chisels have
two cutting edges at right angles to each other, as shewn at Figure 6, and

page_text: they are inclined, so as to be parallel to the inclination of the table h. The
chisels being brought down, cut one side of the tenon or mortise [whichever it
may be called], as shown in Figure 7. The piece is now carried to the inclined
table h¹ on the other side, and the reverse of the table , and the operation
repeated to complete the mortise, the sides and cutting edges of the chisels
or set of chisels being the reverse of the set k to complete the operation.
First, I claim the inclined fronting guide in combination with the oblique
cutting edges of the saw teeth, in the manner and for the purposes set forth.
Second, I claim the double inclined tables in combination with the series
of vertical chisels, in the manner and for the purposes set forth.
In testimony whereof, I have hereunto set my signature and seal, this
Sixth day of April, in the year of our Lord One thousand eight hundred
and fifty-five.
THOMAS HALEY BURLEY. (L.S.)