An Improved Dovetailing or Wood-working Machine.
Year: 1899

page_text: An Improved Dovetailing or Wood-working Machine.
We, JOHN PARNALL, of Narrow Wine Street, Bristol, Manufacturer, JOHN
BARTER, of 17, Perry Street, Stapleton Road, Bristol, Machinist, and WILLIAM
PANES, of 6, Trelawney Road, Brislington, Bristol, Machinist, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to an improved dovetailing or wood-working, machine,
particularly designed for drawer making. In carrying out our 'invention, we
provide a standard, having a flat top or table, slotted on its upper surface. Move-
able bearings are mounted on this table and are kept in position by set screws
passing through a bridge or cramp. These bearings have spindles running
through them, carrying moveable cutters at the ends. A rest is attached to the
front of the standard, having a horizontal and vertical sliding motion.
spindles are driven from a drum attached to the base of the standard.
The
JOHN PARNALL.
JOHN BARTER..
WILLIAM PANES,
An Improved Dovetailing or Wood-working Machine.
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We, JOHN PARNALL, of Narrow Wine Street, Bristol, Manufacturer, JOHN
BARTER, of 17, Perry Street, Stapleton Road, Bristol, Machinist, and WILLIAM
PANES, of 6, Trelawney Road, Brislington, Bristol, Machinist, 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:→
Our invention relates to an improved dovetailing or wood-working machine
particularly designed for drawer making."
In carrying out our invention we provide a standard having a flat top or
table slotted on its upper surface. Moveable bearings are mounted on this table,
and are kept in position by set screws passing through a bridge or cramp.
These bearings have spindles running through them, carrying moveable cutters
at the ends. A rest is attached to the front of the standard, having a horizontal
and vertical sliding motion. The spindles are driven from a drum attached to
the base of the standard.
The invention is described in the accompanying drawings. Fig. 1 is a plan
Fig. 2 is a front elevation, and Fig. 3 a side elevation. A represents the frame
or standard, B the bed or top, having long bearings C mounted thereon. These

page_text: bearings are moveable to various distances apart and are formed with projecting
strips on the bottom, which strips fit into slots B¹ in the upper surface of the
bed, to keep them parallel.
The bearings C have spindles running through them which are fitted at the
back end with grooved pulleys C¹ made reversible to clear each other, and at
the front end with chucks C carrying moveable taper cutters C³, the said cutters
being held in position by flush set screws.
The bearings C are held by a bridge or cramp D, cach bearing being set by
winged set screws D¹.
The front of the frame A is fitted with a slide rest E having a vertical and
horizontal motion. Vertical motion is given by a foot lever E pivoted to the
frame A and connected at the end with a jointed regulating bar E³, the said
bar being also connected by a joint with the vertical part of the slide rest E.
The foot lever E' is fitted with a balance weight. Horizontal motion is given
to the slide rest E by the hand wheel and spindle F. The front of the slide
rest E is fitted with a cramp G, secured at each end by screwed studs and nuts G¹,
and provided with a winged set screw G².
H represents a moveable table or rest mounted on a bracket H' which is attached
to the slide rest E when the cramp G is removed. This bracket H' carrying
the table H is secured in position by two set screws H2 which pass through
the bracket into the slide rest E. The table H is connected to the bracket by
lugs I and is jointed in the centre, so that either half can be lowered to an angle
by the hand wheels and screws I which pass through the bracket H¹.
The top
of the table is provided with a pivoted hand lever J for holding the material
to be operated upon in position. A driving drum K is fixed at the base of the
frame and is connected to the grooved pulleys C' by straps for conveying motion
to the machine.
In working the machine the wood to be mortice-dovetailed is placed flat on
the table H and fixed in position under the cutters C³ and held by the hand
lever J. The table is then operated by the foot lever E¹ which when depressed
raises the table bringing the wood in contact with the revolving cutters and
causing them to pass through it thus forming the dovetails. Shoulder or half
dovetails are formed by keeping the centres of the two outside revolving cutters
level with the outer edges of the wood operated on.
Several thicknesses of wood can be mortice-dovetailed at one operation.
To form pin-dovetails, which fit into the mortice-dovetails above described,
the wood is placed flat on the table H which is canted to a suitable angle as
shown by the dotted lines on Fig. 2, and then operated in the same manner as
described above for mortice-dovetailing, one side of the pin being done at a
time. The distance between the pin-dovetails is regulated by the hand wheel
and screw F, which operates the horizontal slide. An adjustable stop is placed
at each end of the slide to prevent the required distance being exceeded.
In making drawer fronts, dovetails do not show through. To accomplish
this part of the work the table H, is removed from the machine and the cramp G
is fixed in position by the screwed studs and nuts G¹. The drawer front is placed
in a vertical position between the cramp and the planed face of the horizontal
portion of slide rest E, and is held by the winged set screw G2. It is then
brought in contact with the cutters C3 by the foot lever as before described for
mortice-dovetailing. The depth of the mortice is regulated by stops L on the
side of the frame.
The positions of the dovetails to be cut and the number and sizes of cutters
in operation at one time can be varied as required.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A dovetailing machine with moveable bearings and cutters, enabling the

page_text: positions and sizes of the dovetails and the number to be cut to be varied, as
required substantially as specified and shown.
2. A dovetailing machine with a table for doing mortice and pin-dovetailing
upon, which may be detached and a cramp substituted and will then dovetail
drawer fronts, substantially as specified and shown.
Doted thin 10th dove of Januar 1000
JOHN PARNALL.
JOHN BARTER.
WILLIAM PANES,