Year: 1885

page_text: топдиошь,
I, JOHN KNOTT of 58 Warrington Street, Ashton under Lyne, in the County
of Lancashire, Engineer, do hereby declare the nature of this invention to be as
follows:-
"
"
"
This invention enables dovetailing to be done by the machine exactly as usually
performed by hand labour viz:-producing in one piece of the wood forming the
joint a long traverse or opening and a narrow pin or locking piece between
the openings and in the other piece of wood forming the joint a long pin or locking
piece and narrow "traverse" or opening; the two pieces corresponding exactly with
each other and forming a perfect joint similar to the ordinary hand made joint.
I use an ordinary table and cutter, and my invention consists of fittings to a
'carrier of peculiar form, (which serves for all classes of dovetailing work, and to
which the wood to be operated upon is attached) a rack and pinion and a rack and
toothed segment, which are operated by an alternating "cam" motion derived from
a metallic disc driven by a belt or other suitable means.
Although it is specially as applied for dovetailing work that my invention
possesses advantages over existing machines by the addition of a table in two parts
a "fence" and guiding brackets. I adapt the machine to perform various kinds of
wood working such as mortising, tenoning, tongueing, grooving both straight and
irregular moulding. In this work the carrier for dovetailing work is removed and
replaced by the parts previously named cutters for the various operations being
fitted in place of the dovetailing cutter.
W. LLOYD WISE,
Per James G. Stokes,
Applicant's Agent.

page_text: Tongueing, Grooving, and Moulding.
I JOHN. KNOTT of 53 Warrington Street Ashton under Lyne, in the County of
Lancashire, Engineer, 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:—
«
"
This invention enables dovetailing to be done by the machine exactly as usually
performed by hand labour viz-producing in one piece of the wood forming the
joint a long traverse or opening and a narrow "pin" or locking piece between
the openings and in the other piece of wood forming the joint a long pin or locking
piece and narrow traverse or opening; the two pieces corresponding exactly with
each other and forming a perfect joint similar to the ordinary hand made joint.
»
I use an ordinary table and cutter, and my invention consists of fitting to a
carrier of peculiar form (which serves for all classes of dovetailing work, and to
which the wood to be operated upon is attached) a rack and pinion and a rack and
toothed segment, which are operated by an alternating "cam motion derived from
a metallic disc driven by a belt or other suitable means.
"
It is specially as applied for dovetailing work that my invention possesses
advantages over existing machines in being capable of cutting dovetails as they
are cut by hand in which the centres or "pitch " of the pins, or locking pieces,
relatively to the centres or "pitch" of the "traverses" or openings in one piece, and
of the corresponding parts in the other piece of the work, can be varied as required
ie, that any required number of dovetails can be cut in a given space. By the
addition of a table in two parts a "fence" and guiding brackets I adapt the
machine to perform various kinds of wood working such as mortising tenoning,
tongueing grooving both straight and irregular moulding. In this work the carrier
for dovetailing work is removed and replaced by the table "fence" and guiding
brackets, cutters for the various operations being fitted in place of the dovetailing
cutter.

page_text: Referring to Figures 1, 2, and 3 shewing the machine fitted for dovetailing
work A is a cutter with two cutting edges carried in a tool box fitted with an
adjusting screw for regulating the position of the cutting tool. B. C. D are the
parts used in holding in position and moving the wood to be operated upon by the
tool, and called the "carrier." E is a metallic disc wheel having a number of holes
in series of circles formed in the periphery, the holes in any one circle round it
being spaced at equal distances from each other, and the number of circles of holes
determining the different lengths of "traverse" or opening the machine is con-
structed to make. F is a vertical rod having an arm formed on the upper end in
which is a slot to allow the pin G to be brought over any one of the circles of
holes. His a horizontal shaft having fixed or formed on it two striking or lifting
pins arranged to raise the vertical rod F twice during each revolution of the shaft.
I is a spring acting on the vertical rod F causing it to descend, thus bringing the
pin G into one of the holes in the disc wheel. J is a bell crank lever, also operated
by the vertical rod F holding and releasing the pinion K on its spindle by means
of a clutch or friction cone Q The extension of the spindle carries the long
pinion P gearing into the rack P¹ on the underside of part B of the carrier. Lis
an eccentric cam fixed on the shaft H which by means of the usual rod attachment
gives lateral or transverse motion to the cross frame D of carrier with its separate
parts B & C. N is a shaft operating a cam or pawl not seen on drawing which
gears into the rack O under the portion B of the carrier, and prevents the longi-
tudinal motion of the portion B. C of the carrier, during the period that the entire
carrier is being moved transversely. N₁ is a pinion, keyed on shaft N, gearing
into and driving pinion K. R is an eccentric cam for sliding the frame S carrying
the driving spindle T and cutter to and fro when producing "through-and-through'
dovetailing work The cam R is fixed on a vertical shaft driven by a counter
shaft by the bevil wheel V on shaft H such being a description of the parts of the
machine its mode of operation is as follows:-
The tool A is caused to revolve rapidly in the usual way by means of a belt from
the engine to the spindle T as also is the shaft H, by a separate belt, through
gearing properly speeded not shewn on drawing by the bevel wheel V shown on
projecting end Figures 1 and 3. The eccentric cam L on shaft H causes the whole
carrier B. C. D to move transversely, and the cutter entering the wood forms
the traverse or female part of the dovetail in the vertical piece of wood and then
euters the horizontal piece Then one of the striking or lifting pins on the shaft H
raises the vertical rod F, and releases the disc wheel E and by means of the bell
crank lever J and clutch, secures the pinion K to its spindle which revolving
revolves also the long pinion P which acting on the rack P¹ formed on the under
part B of the carrier, causes the part B of carrier to move, with the horizontal piece
of wood, in a longitudinal direction in the cross frame D and during this op-ration
the cutter forms the traverse or female part in the horizontal piece of wood.
When this traverse is being formed the part of the carrier C holding the vertical
piece of wood is held fast by the pawl in the rack O operated by the cam on the
shaft N and the eccentric cam L again acting causes a return transverse movement
of the cross frame D of the carrier and the cutter emerges through the same hole in
the vertical piece of wood by which it entered. The spring then causes the
part C of the carrier to move longitudinally a distance equal to that moved by the
part B then, the pawl being released by the revolution of the cam on shaft N the
parts B. C of the carrier by the pinion P acting on the rack P¹ move simultaneously
in the same longitudinal direction such distance as may be desired determined by
the pin G engaging with disc E and the cutter again enters the vertical piece
passing through into the horizontal. The above described operations are. repeated
until the dovetails have been completed in both pieces of wood in such a manner
that they form a perfect dovetailed joint of any required number of dovetails.
The distance apart of the holes in disc wheel determine the length of traverse or
opening and size of the narrow pin or locking piece.

page_text: When fitted for variety moulding the carrier B. C. D is removed and the table
shown by figure 4 is fitted to the machine. Mortising, tenoning, & &° will be
conveniently done on bracket table U shewn on right hand of Figure 1 but there
is no novelty in the machine as to performing such work.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I would have it
understood that I do not confine myself to the exact details of the parts specified
seeing that they are susceptable of many modifications, but I declare that what
I claim as my invention is
The construction and application of machines for dovetailing-or convertable for
mortising tenoning variety moulding and other work-capable of cutting dovetails
of varying "pitches" or distances apart comprising the various parts arranged and
operating substantially as described and illustrated or any mere modification of
such parts to effect the same essential movements of the work to be dovetailed
relatively to the cutting tool.
Dated the 26th day of June 1886.
Witness:
T. J. DANSON, F. Inst. P.A.,
Consulting Engineer & Patent Agent,
Newcastle upon Tyne.
JOHN KNOTT.