in Connection with the same.
Year: 1886

page_text: Date of Application, 13th Mar., 1886.
Complete, Left, 11th Dec., 1886.
Complete Accepted, 11th Jan., 1887.
Use in Connection with the same.
I SILVESTER WARBURTON Engineer of 59 Lilian Place Burley Nr. Leeds, Yorkshire
do hereby declare the nature of my invention for CHISSELS TO MAKE DOVETAIL GROVE
AND DOVETAIL PINS to be as follows:-
A combination of Saws, & Cutters fixed in a Socket to form a Chissel that can be
used in an Ordinary Morticing Machine for Hand or power.
To make dovetail groves the saw are so arranged that the lenght way the run
paralell with each other but are jointed at the back so as to form from front surface
or edge to the back a V (V) the shape of a dove tail grove, from the point upwards
they are taper on front edge & have teeth cut similar to a tenoning saw between the
two saws and on the front side where the taper terminates I have a chissel fixed
between the 2 saws, with the cutting edge face at the outmost end surface of the
teeth in saws, the chissel has the cutting edge made in a slant so that when the
saws have cut each side the required depth the chissel cuts the center piece out
starting from one side thereby preventing the splitting of the wood on the bottom.
On the side where the chissel has the highest point of the slant there is an opening
cut out in the saw for to allow the piece of wood to drop out and thereby giving a
clearance for the next dove tail grove to be cut.
To make the pins that fit in the dove tail grove I have one saw only also taper on
front with teeth similar to a tenoning saw fixed in a socket on side of saw also in
same socket I have a chisel made with a slanting cutting edge the slanting angle of
chissel is the same as the V (V) in the 2 saws, above discribed and the end of the
taper in saw is the starting possition of the lowest point of the slanting chissil.
To make the dove tail pins I have the wood at an angle to the cutter and use the
saw only by not putting the chissel in the socket and saw groves the required
distance and depth, when I have got the suficent number of groves wanted then I
ix my chissel close to the saw and turn my wood-to the oposite angle to what it was
when I used the saw only then with the saw & chissel combined I saw on one

page_text: side & cut with the chisel the piece out that is left in between the grove I am
sawing and that grove that I have cut by the saw only and thereby make a perfect
dovetail pin to suit.
To make blind dove tails that is dove tails, that do not show through I have the
same chissel & saws that makes the dovetail grove but for making the pins to
suit I use a revolving cutter that works on a socket with wheels to drive by hand or
power the cutter is broader at the point than the root and has a cutting edge a
suficient depth required for cutting and by moving same from the outer edge in the
depth required to to fit the pin.
The table for holding the woods is made so that same can be slanted at right or
left or remain paralell at will. The table has a slide that holds the wood in possition,
the slide moves at end in an Index so. as to give the proper distance required for
pins & dove tail groves without marking same and has an arrangement for the
wood to rest on so that when cutting dove tail pins or groves it does not split on the
bottom side..

page_text: Use in Connection with the same.
I SILVESTER WARBURTON Engineer of 59 Lilian Place Burley Nr. Leeds Yorkshire
do hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
A combination of Saws, and Cutters fixed in a Socket to form a Chisel that can be
used in an Ordinary Morticing Machine for Hand or Power.
To make dove tail groves the saws are so arranged that lenght way they run
parallel with each other but are jointed at the back so as to form from the fron
surface or edge to the back a V (V) the shape of a dove tail grove, from the point
upwards they are taper on front edge and have teeth cut similar to a tenoning saw,
between the two saws and on the front side where the taper terminates I have a
chisel fixed between the two saws with the cutting edge face at the outmost end
surface of the teeth in the saws, the chisel has the cutting edge made in a stant so
that when the saws has cut each side the required depth the chisel cuts the center
piece out starting from one side thereby preventing the splitting of the wood on the
bottom. The saws have an opening comencing where the point of the chisel is at
the lowest, suficient to allow the piece of wood that remains between the saws after
the cutter has passed through to drop out and thereby giving a clearance for the next
dove tail grove to be cut.
To make the pins that fit in the dove tail grove I have one or two saws, also taper
on, front, with teeth similar to a tenoning saw fixed in a socket on side of one of the
two saws I have a chisel made with.a slanting cutting edge the slanting angle of chisel
is the same a the V (V) in the two saws used for cutting the dove tail groves, and
the end of the taper in the saw is the starting position of the lowest point of the
slanting chisel, the other saw is fixed at the oposite side of the chisel and has the
teeth on the oposite side to the saw that is used with the chisel combined.
To make dove tail pins I have the wood at an angle to the cutter and us the saw
only, that is not the cutter and saw combined, and make the number of grove
required, I reverse the tool and bring the saw and chisel combined in position to
work and turn my wood the oposite angle to what it was when I was using the
saw only then with the saw and chisel combined I saw on one side and cut with
the chisel the piece out that is left in between the grove I am sawing and the grove
that I have cut by the saw only and thereby make a perfect dove tail pin to suit.
To make blind dovetails that is dovetails, that do not show through, I use the
same chisel and saw combination that I have for the making of dovetail grove, but
for making the pins I use two distinct ways, first by using the cutter and saw
combination I use for making through dove tail pins and secondly I use a revolving
cutter that works on a spindle socket with wheels, to drive by hand or power the
cutter is broader at the bottom and tapers up to suit the dove tail grove and has a
cutting edge the suficient depth required for cutting.

page_text: When using the saw and cutter combined to make the blind dovetail pins I place
the wood in addition to an angle to right and left at an angle of forty five degree or
therabout to the face of the cutter and use the saw only and then the saw and cutter
combined similar as if for making through dove tail pins but by passing through the
wood at an angle above described it does not pass out at the bottoin but from top and
out of the side the suitable distance required.
When I make dovetail pins with the revolving cutter. I place same in the spindle
socket and move the wood to the cutter in an horizontal line after I have set the
cutter to the proper depth required.
The table for holding the wood is made so that same can be slanted at right or left
angle or remain parallel at will. The table has a slide that holds the wood in
position by means of an exenter lever bar to suit diferent thickness of wood... The
slide moves in a grove, and at the end are holes suitable distance from each other and
a pin to hold the slide in position during, the operation of each grove or pin and
removed from one hole to the other, and thereby saving in marking the distances by
hand, on bottom part of table where the wood rest on there is an arrangement for the
wood to rest so that when the cutter is passing down, it passes close to the edge of
the table an thereby preventing the wood splitting on the bottom side.
...
In order that my Invention may be more- completely understood I annex and
proceed to describe the accompanying Sheets of Drawings.
out.
F
:
Fig. 1. Sheet 1. Chisel, to make dovetail grove front and side, elevation a-a
socket. b. cutter between the two saws cc. y opening to allow the center piece to drop
x-a section lines. Fig. 2 Sheet 1 Chisel to make dovetail pins front and
side elevation a-a socket b cutter c-c saws.. D screw.for holding cutter and saws
E die inscerted between the saws and cutter, by reversing the tool the saw only and
the saw and cutter combined are worked. Fig: 3: Sheet 1, Plan. Fig. 4. Sheet 1
Section of saws at of Fig. 1. Sheet 1. c-c showing how they are jointed at
the back and open in a V (V) shape form at the front. Fig. 5 Sheet 1 plan of
Fig. 2. Sheet 1. Fig. 6 Sheet 1 section through - Fig. 2 Sheet 1 cc saws & cutter
showing how one of the saws is jointed with the cutter.
Sheet 2. Fig. 1. Showing position of the saws, entering the wood a socket b
cutter c saw. H wood Fig. 2. Sheet 2. Showing position of cutter having passed
trough the wood. a socket c saws H wood. Fig. 3 Sheet 2 end view of wood
showing dove tail grove complete. Fig. 4 Sheet 2. 1 Showing plan of dovetail
grove finished 2. in position when the 2 saws has done the work and the cutter just
comencing to cut at z z 3. position when saw are, just finishing 4. position when
the saw have gone partly through. Fig. 5. Sheet 2. b cutter, c saws. H wood
Showing wood at angle and tool in sutch a position that saw only is working making
groves. Ggrove in wood. Fig. 6 Sheet 2 cutter. H wood showing, wood at
oposite angle to making grove only, and tool reversed showing saw, and, cutter working
in combination cutting the piece out between the grove cutting, and, the grove cut in
previos operation piece cut out. Fig. 7 Sheet 2 end view of wood showing
dove tail pins finished. Fig. 8 Sheet 2. Showing plan of dovetail pins 1 open space
between the pins 2 showing grove z cut.by Fig. 5 Sheet, 2 operation and cutter, partly
passed through Fig. 1 Sheet 3. a end view plane side view of wood with dove tail
grove for blind dove tail e showing wood cut at slant for same.
Fig. 2 Sheet 3. a end view 6 plan c side view of dovetail pins showing how Dis
jointed to c. Fig. 3 Sheet 3. position of wood & position of tool for dove tail grove.
Fig. 4 Sheet 3.
a wood toole table showing the angle to make dove tail pins.
The above blind dove tail are not particular to the distance of the groves.
Fig. 5 Sheet 3. a end view b plan c side view showing the distance of the groves
the groves corespond with the projecting parts. Fig. 6 a end view (b) plan c side
view showing how D is inscerted to make a complete blind dovetail.
'
'a
Fig. 7 Sheet 3. a revolving apparatus revolving cutter c' wood D table. Fig. 8
Sheet 3. a revolving apparatus & revolving cutter c wood D table showing end view of
wood and how the cutters enters the wood as show by an arrow.

page_text: Fig. 1 Sheet 4 front view of table a exenter lever bar wood c table D stand for
fixing table on L & R denotes the angle lines to righ and left. Fig. 2 Sheet 4
a exenter lever bar wood c table D holders, for exenter lever E dovetailing tool
fixed in a socket G. F part of a morticing machine table showing how the dovetailing
table is fixed to same H part of a morticing machine stand.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is
I. The combination of a socket holding two saws parallel lenght way and jointed
together at the back and open on the front so that from edge to the back they form
V (V) shape grove and on front or open edge are made taper from point a suitable
distance and have teeth on the outmost edge the shape of a tenoning saw. At the
termination of the taper I have a chisel inscerted between the two saw, and an
opening in the saws at the back of the chisel to allow the center piece to drop out.
II. A socket with one or two saws, made taper on front edge a suitablo distance up,
and a chisel fited close to one of the saws, with a slanting cutting edge, the cutting
edge to have the same angle as the two saws for cutting the dovetail grove.
III. The slanting table to fit the wood for dovetailing and moving same to righ
or left angle as required.