provements in Machines for Moulding or Impressing Wood and other Materials, and in the Manufacture of Sheet Metal Mouldings and the like.
Year: 1889

page_text: COMPLETE SPECIFICATION
Improvements in Machines for Moulding or Impressing Wood and
other Materials, and in the Manufacture of Sheet Metal Mouldings
and the like.
I, ABRAHAM MARTIN, of 177 Aston Lane, Birmingham in the County of Warwick,
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 :-
My invention relates to improvements in machines of the kind forming the subject
of a previous application for Letters Patent dated the 14th day of March 1889
No. 4476, for moulding or impressing designs upon wood and metal; the impression
being produced upon wood by the combined action of heat and pressure.
The Invention relates first to the combination of cam and clutch mechanism whereby
an alternately advancing and receding, but progressive, motion is given to the
traversing bed upon which the work is supported, the effect produced being equivalent
to a forward and backward rolling motion of the impressing cylinder on the wood,
thus causing a repeated application of the moulding or impressing surface upon the
still heated work without liability of inaccurate registor of the pattern which would
result from repeating the operation of passing the whole length of the wood at once
through the machine.
The Invention has secondly for its object to adapt the said machines to produce
mouldings of circular, oval, wavy, or other than straight, forms; and it consists in
the combination with the traversing bed of a disc bed turning about a centre and in
adapting the moulding or impressing cylinder to be shifted by a cain motion laterally
or in the radial direction of the said disc.
Reference is to be had to the accompanying drawings forming part of this specifi-
cation wherein figure 1 is a plan of part of the machine, and figure 2 is an end
elevation thereof. Figures 3 and 4 show details. The same letters of reference
indicate the same parts in all the figures.
A is the framing, and B a traversing bed supported on guides. The bed is
constructed of a grid-like frame with a top of thin metal plate and is heated by gas
jets beneath it, all as described in my previous application aforesaid. It is traversed
on its guides by means of a leading screw D actuated by automatic reversing gear
whereby an alternately advancing and receding, but progressive, motion is given
to the bed B, as above described. Motion is communicated to the screw D by a
cross-shaft E through a pair of opposite mitre wheels F F gearing with the mitre
wheel on the screw, and alternately coupled with the shaft E by a friction clutch G
operated by a T-shaped sway-bar H pivoted at hand. engaged by one or other of its
ends with one or other of two grooved cams I l'on shaft E, the said engagement
being effected by a bar J mounted to slide on H and adjusted in position to engage
with one or other cam by means of a hand lever K. The cams correspond to each
other in form and position, their form being such (see figure 4) that the clutch, is held
in gear with the mitre wheels F F alternately, but for a longer time with the one
than with the other so as to give the desired to and fro, yet advancing, motion to the
bed B. As the cams act on opposite ends of the lever H, the direction of advance
of the bed will be opposite according as lever H is in gear with the one or other
cam. The bed B is preferably constructed and heated as described in my aforesaid
previous patent, and upon it rests a circular flat plate L pivoted at its centre to a
fixed bracket arm 7, the pivot being removable to admit of circular mouldings being
placed upon the disc.
The moulding or impressing cylinder U may be constructed of juxtaposed rings
nd (when operating on wood) being heated internally as described in my other

page_text: specification or it may be otherwise constructed. It has a figured, engraved, or
moulded, periphery produced upon it in the way described in my aforesaid previous
specification or in any other suitable manner. Its shaft O is mounted to slide
longitudinally in its bearings and receives to and fro motion when required by
means of a cam P (figure 3) of suitable form, fixed on the shaft and engaging with
a lug p attached to the bearing block. When longitudinal motion of the shaft O is
not required, the cam P is replaced iby a plain collar Q, as in figure 2, by which the
- position of the cylinder C is rendered constant. The bearings of the cylinder shaft
are vertically adjustable by pressure screws N geared together by.a cross shaft and
bevel wheels for operating the pressure screws simultaneously and equally.
The disc Lis only used when operating on circular mouldings or frames and in
this case the-cam P is not required,.and the operation-is-as-follows;-A-suitably
constructed ring of wood is fixed concentrically upon the disc L and the moulding
cylinder brought down upon it with sufficient pressure to impress upon the
wood, the peripheral pattern of the cylinder, the wood being softened by the 'heat
transmitted from the cylinder and the heated bed. As the pressure of the cylinder
is virtually resisted only by that part of the bed B which is directly beneath the
cylinder, the disc L is free to rotate about its central pivot as the bed B moves
along, and in this manner the whole of the circular frame is gradually brought under
the operation of the impressing cylinder.
In order to mould or impress an oval frame, a cam such as P may be used to
impart a lateral traverse to the cylinder C conjointly with the circular motion of the
disc L. In that case, the cylinder C should be equal in circumference to half the
circumference of the oval frame under operation. For the production of mouldings
of sinuous form, the disc L would not be employed the 'board being placed directly
upon the bed B which receives an alternate advancing and receding, but progressive,
motion as above described at same time that the cylinder C receives a to and fro
lateral motion from cam P.
My Invention comprises the manufacture of wood mouldings sheathed or faced
with thin sheet, brass, or copper, both the wood and the metal "being embossed or
impressed simultaneously, by passing them together through the above described
.machine, the embossed metal being at same time caused by the pressure and heat to
adhere to the wood which has been previously coated with a suitable cement. In this
way the wood forms a perfect backing as it corresponds exactly to the embossing of
the metal.
My Invention also comprises the embossing of thin sheet metal for application
without à backing. In this case, the thin sheet metal is embossed upon a temporary
backing or support of lead the operation, being the same, as above described, except
that heat is not required. The advantage of this mode of embossing thin sheet metal
is that as the length of the metal under operation at any given moment.is very small;
the drawing of the metal into the figured design is not restricted by pressure on
adjacent portions as when the whole of the surface is impressed at once.
Having now particularly described and ascertained the nature of the said Invention
and in what manner the same is to be performed, 1.declare that what I claim is ;——
1. In a machine of the kind described, the combination with the leading screw of
the traversing bed, of cam and clutch mechanism substantially as specified, whereby
alternate advancing and receding, but progressively, traversing motion is imparted to
the bed, as and for the purpose specified.
2. In a machine of the kind described the combination with the horizontally
traversing bed and with the impression cylinder, of a disc bed rotating about n
fixed centre and resting on and receiving motion from the longitudinally traversing
bed,,as and for the purpose specified.
3. In a machine of the kind described the combination with the impression cylinder
of a cam for imparting to and fro lateral motion to the cylinder in combination
with a longitudinal to and fro traversing motion to the bed, substantially as and
for the purpose specified.

page_text: 4. The manufacture of metal sheathed mouldings and the like by impressing thin
sheet metal along with a wood backing and causing them to adhere, as specified.
5. The herein described method of embossing thin sheet metal between an embossing
cylinder and a backing of soft metal, substantially as specified.
Dated this 27th day of July 1889.
A. MARTIN,
By A. M. & Wm. Clark,
Patent Agents.