Improvements in or relating to the Production of Designs on Wood in Imitation of Carved Work, and Apparatus therefor.
Year: 1893

page_text: Date of Application, 17th Apr., 1893
Complete Specification Left, 15th Feb., 1894-Accepted, 17th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Production of Designs on Wood
in Imitation of Carved Work, and Apparatus therefor.
A communication by CARLO BIANCHI, of Milan, and GIULIO DE SANTEIRON DE
ST. CLÉMENT, of Turin, both in the Kingdom of Italy, Architect and
Gentleman, respectively.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object an improved mechanical process which is called
"stampintagliatura" and which allows of figures, intaglios, bas-reliefs and the like
being reproduced in wood at a very small cost.
The machinery employed for putting this process in practice is as follows-
1. A pump having two or more pistons, and which may be of any suitable kind
so long as it is capable of working at a high pressure. The frame on which it is
mounted contains a certain amount of water which is supplied from a reservoir.
2. A hydraulic accumulator which must be capable of transmitting to a hydraulic
press the necessary pressure for producing the desired effect.
3. The hydraulic press just mentioned. This pressure varies between 25 kilo-
grammes per hundred squares of surface pressed, for hard woods such as walnut,
peartree, etcetera, and 15 kilogrammes per hundred squares for soft woods such as
poplar, etcetera. The water enters at the bottom of the accumulator by means of a
pipe from the pump, and lifts a cylinder contained therein owing to the difference in
the diameter of the two pistons arranged in the same. When the cylinder has
reached the upper extremity of its course, it is stopped by means of a lever which
opens the safety valve of the pump.
The hydraulic press hereinbefore mentioned serves to rough out the carving in
the wood and is characterised by the following arrangements which are not found in
ordinary hydraulic presses, namely,
a. A lever operating simultaneously two valves, the first of which serves for
introducing the water and the second for discharging it. By means of a rapid, so
to speak jerky operation of this lever, a pressure may be given to the piston of the
press ever so little greater than the hydrostatic pressure which exists in the
accumulator; this excess of pressure prevents the shock which is produced by
the instantancous stoppage of the cylinder of the latter.
b. Below the cover of the press, a support is arranged which has jaws fitted with
double screws operated by hand wheels and intended to hold the piece of wood which
is to be treated.
c. A furnace plate of a very peculiar construction which has ridges and grooves
arranged alternately in a transverse direction. These ridges are traversed by
tubes and also support other tubes perforated with holes along their generating
line and receiving a mixture of gas and air from a transverse tube arranged at one
end of the press and fed in its turn by means of a gas pipe, and a second pipe in
which air is brought from a compressing apparatus. This arrangement of heater
produces economically in a few moments a temperature sufficiently elevated to heat
to a dull red heat the mould which is fixed on the heating plate by arranging its
longest side perpendicularly to the ridges. The heating plate is fixed in its turn by

page_text: means of bolts to an under plate, which is the actual bed plate or the hydraulic
press.
d. The bed plate is provided with grooves of about four centimetres in depth
communicating with one another by means of holes.
e. A constant circulation of air and cold water supplied from the main reservoir
is maintained in the bed plate of the piston. The object of this is to protect the
fittings of this latter from the action of the heat of the heater and plate and of the
mould resting thereon.
In case the press is working intermittently, the circulation of water may be
dispensed with by interposing several layers of asbestos board between the piston
and the bed plate of the press.
4. The finishing apparatus which resembles a planing machine for working
metals. It has a fixed frame, a movable carriage and an automatic belt shifting
fork for reversing the movement at the end of each course. The only special
arrangement consists in the use of two cylinders, pivoting on supports which latter
are capable of sliding on the two parallel sides of the frame; these cylinders are
arranged above the movable carriage, and may be raised or lowered by hand by
means of a flywheel.
If it be a question of reproducing simple designs, the hydraulic press can be
employed by itself as the finishing apparatus. In that case it is employed for
giving the piece of wood a strong pressure by means of the mould, this latter being
applied cold.
5. Water reservoirs of various capacities which are provided externally with a
graduated scale along which a counter weight travels connected by means of a cord
to a float which shows the level of the water inside the reservoir.
The first reservoir is supplied by means of a pulsometer or any other suitable
lifting apparatus and supplies water to two other reservoirs placed at a lower level.
The second reservoir is fed by means of a tube from the first reservoir and in its
turn furnishes water to the pump by means of a tube. The third reservoir is in its
turn supplied by means of another tube from the first or principal reservoir. The
water contained in the third reservoir is heated by means of a steam coil or by
means of any other suitable apparatus. A sufficient quantity of caustic soda is
dissolved therein to form a solution of 10. A short branch pipe, which receives
cold water by means of a third tube from the first reservoir, connects with a tube
at the bottom of this third reservoir through which the contents of the latter
flow away.
In this manner by means of suitably arranged taps, the temperature of the caustic
soda solution may be regulated as desired.
6. An inclined table which serves for the washing of the finished article when it
is removed from the roughing out press.
7. A series of brushes which are used for cleaning and polishing the wood.
The first of these brushes is used by hand. It is formed of very stiff vegetable
fibres (roots). The second brush is circular in form and is also formed of very
resistant vegetable fibres; it is mounted on a single shaft with another similar
brush, and this shaft receives its motion by means of a pulley. The third brush
may also be equally well employed coupled on the same shaft with another similar
brush; it only differs from the second brush in having its fibres made of very strong
pig's or other animal's bristles.
8. A mould which is employed cold, and is made of cast iron, bronze, steel or
other suitable metal. It reproduces on its upper surface the shape of the plaster
model which represents the design or pattern which it is desired to reproduce. On
its rear face it has a longitudinal groove which serves as a guide when it is fitted in
the finishing machine. The longitudinal projection along the centre of the movable
carriage of the finishing machine fits into this groove.
This mould must be made or tooled with great care in order to remove any
trace of defects in casting and to insure a perfect identity between the plaster
model and its negative, that is to say, the mould in question. It is in order to

page_text: obtain a more perfeet sharpness for the mould, that it is preferable to employ.
bronze or steel for the manufacture of the same.
9. A mould which is to be used hot. This is of similar metal to the one used for
the cold mould.
centi-
The mould which is used hot must be cast from the mould which is used cold
and which is taken as the model. The result is, that after a careful tooling, the
final dimensions of the two moulds present a difference which exactly corresponds
to the influence of the different temperatures at which they are intended to be
used. This "hot" mould has on its rear side longitudinal grooves about
metres in depth intended to concentrate the heat developed by the furnace. Two
transverse grooves arranged on the same side are intended to receive two ridges
formed on the furnace plate. In the mould which is to be used hot, corresponding
to the most recessed parts of the pattern, small circular holes of about 3 milli-
metres in diameter are arranged which are prolonged until they meet other holes
of about 8 millimetres in diameter which run transversely; these holes or channels
serve to allow the smoke and gaseous products to escape which are developed
by the contact of the compressed wood with the heated mould.
In the side faces of the two moulds, square holes are formed of about
4 centimetres side measurement and 7 centimetres in depth serving for the insertion
of iron bars by means of which the workmen may shift the moulds.
Care must be taken that a thickness of metal of at least 2 centimetres for the
mould which is used cold, and of at least 5 centimetres for the mould which is
used hot, remains intact between the lower face of the mould and the deepest
recessed point of the design. In order to avoid oxidation of the mould, care
must be taken to allow it to cool in a sand bath.
To the apparatus and machines herein before enumerated, there must be added
10. A pulsometer or other suitable lifting apparatus supplying water to the first
or main reservoir.
11. A steam air compressing apparatus for supplying air to the heating plate,
and also for providing a jet of hot air for the purpose of cleaning the mould
by removing the charcoal which may adhere thereto each time that a fresh piece
of wood is subjected to the pressure.
Having thus described all the apparatus and machinery employed with the
exception of the motor and the power transmitting apparatus, the mode of working
of these parts will now be explained, in which also the novelty of this process
exists.
After having adjusted the accumulator in the manner hereinbefore described, the
mould which is to be heated is placed on the heating plate and it is heated by
means of the flames emerging from the series of gas tubes hereinbefore described,
and fed by the current of air supplied by the compressor. These flames play
upon the lower or under side of the furnace plate as well as its sides, and raise
its temperature to a dull red. The taps and the current of air are then adjusted
in such a way as to maintain a constant temperature. The object may be attained
by placing on the heating plate a mould previously heated to a suitable temperature
in a reverberatory furnace which may contain several moulds at a time. In this
case gas need only be used for maintaining the initial temperature, or even it
can be entirely dispensed with, and the moulds replaced as they become cool by
other moulds just drawn from the furnace.
As soon as the mould placed on the heating plate has reached a dull red heat, a
piece of wood of suitable dimensions is selected and placed on the mould. By
operating the lever, the heating plate is immediately raised until it presses against
the upper support, after which the hand wheel is rapidly revolved so that the wood
is gripped between the jaws which are arranged for this object; the lever is then
again operated in order to detach the mould from the wood. The lever continues
to be operated in such a way that the piece of wood receives from the mould a
series of successive impressions at rapid intervals, jerky blows so to speak, until
the design which it is desired to reproduce has penetrated into the wood to a depth

page_text: of about 1 centimetre. After that by revolving the hand wheel in the opposite
direction to that of its previous rotation, the piece of wood is removed in order that
it may undergo a preliminary cleaning by means of the first brush, and then a
second cleaning by means of the other circular revolving brushes which are pressed
strongly against the wood.
The piece then undergoes the operations just described afresh, which are repeated
in the same way until the impression of the mould has been completely reproduced
in the wood. Before replacing one piece of wood on the mould with another, the
mould is cleaned by causing a current of hot air furnished by the compressor to
impinge upon it.
When the mould has embossed its pattern on the piece of wood to the desired
extent, the latter is again cleaned by the series of brushes, and it is then placed on
the inclined table and washed by means of water supplied by means of a hose
nozzle from the third reservoir. The first washing is done with a solution of
caustic soda dissolved in hot water, in the proportions hereinbefore stated. It then
undergoes a subsequent washing in cold water, care being taken to brush it at the
same time with the first of the series of brushes, until the soot and charcoal are
entirely removed, and the wood has resumed its natural colour.
When the piece of wood has been thoroughly washed, it is allowed to dry in the
shade in order to prevent it warping, and then conveyed to the finishing apparatus
and placed on the mould fixed to the movable carriage of the same. This carriage
having been set in motion, the pressure exercised by the cylinders on the mould is
regulated as may be required by means of the hand wheel. This operation allows
of the most minute details of the plaster model which was used for casting the
mould being reproduced. The polishing is performed by means of the bristle
brushes hereinbefore mentioned against which the wood is lightly pressed.
Dated this 15th day of Anril 1803
WM. P. THOMPSON & 'Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to the Production of Designs on Wood
in Imitation of Carved Work, and Apparatus therefor.
A communication by CARLO BIANCHI, of Milan, and GIULIO DE SANTEIRON DE
ST. CLÉMENT, of Turin, both in the Kingdom of Italy, Architect and
Gentleman, respectively.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool and 6 Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil 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 has for its object an improved mechanical process which is called
"stampintagliatura" and which allows of figures, intaglios, bas-reliefs and the like
being reproduced in wood at a very small cost.
The machinery employed for putting this process in practice is shown on the
accompanying drawing, in which:-
Figure 1 is an elevation of a pump for operating the mechanism.
Figure 2 is a plan view of the same.
Figure 3 is an elevation of the hydraulic accumulator.
Figure 4 is a plan view of the same.
Figure 5 is an elevation of the hydraulic press.
Figures 6 and 7 are plan views of the same.
Figure 8 is an end elevation of the finishing machine.

page_text: Figures 13, 14, 15 are patterns of brushes employed.
Figure 16 is a section of the mould which is employed cold and
Figure 17 is a section of the mould employed hot.
The invention comprises :-
1. A pump, Figures 1 and 2, having two or more pistons, and which may be of
any suitable kind so long as it is capable of working at a high pressure. The frame
on which it is mounted contains a certain amount of water which is supplied from a
reservoir, Figure 10.
2. A hydraulic accumulator, Figures 3 and 4, of any ordinary kind which must
be capable of transmitting to a hydraulic press, Figure 5, the necessary pressure for
producing the desired effect.
This pressure varies between 25 kilogrammes per hundred squares of surface
pressed, for hard woods, such as walnut, peartree, etcetera, and 15 kilogrammes per
hundred squares for soft woods, such as poplar, etcetera. The accumulator shown in
the drawing is of the ordinary differential type. The water enters at a at the
bottom of the accumulator by means of a pipe t from the pump, Figure 1, and lifts
a weighted cylinder C contained therein, owing to the difference in the diameter of
the two parts a a' of the fixed ram arranged in the cylinder. When the cylinder C
has reached the upper extremity of its course, it is stopped by means of a leverb
which opens the safety valve e of the pump.
The hydraulic press, Figures 5, 6 and 7, hereinbefore mentioned, serves to rough
out the carving in the wood and is characterised by the following arrangements
which are not found in ordinary hydraulic presses, namely
:―
a. A lever operating simultaneously two valves V V1, Figure 1, the first of
which serves for introducing the water and the second for discharging it. By means
of a rapid, so to speak jerky, operation of this lever 1, a pressure may be given to
the piston of the press ever so little greater than the hydrostatic pressure which
exists in the accumulator; this excess of pressure prevents the shock which is
produced by the instantaneous stoppage of the cylinder C.
b. Below the cover C¹ of the press, Figure 5, a support D is arranged, which has
jaws fitted with double screws operated by handwheels m and intended to hold the
piece of wood which is to be treated.
c. A furnace plate B, Figure 5 and Figure 6, is of a very peculiar construction,
which has ridges n and grooves i arranged alternately in a transverse direction.
These ridges are traversed by tubes g, and also support other tubes g' perforated
with holes along their generating line and receiving a mixture of gas and air from
a transverse tube e arranged at one end of the press and fed in its turn by means of
a gas pipe a², and a second pipe in which air is brought from a compressing
apparatus. This arrangement of heater produces economically in a few moments a
temperature sufficiently elevated to heat to a dull red heat the mould A, Figure 17,
which is fixed on the heating plate B by arranging its longest side perpendicularly
to the ridges n. The heating plate B is fixed in its turn by means of bolts
to an under plate B', Figure 7, which is the actual bed plate of the hydraulic
press.
d. The bed plate B' is provided with grooves i of about 4 centimetres in depth,
communicating with one another by means of holes f, (Figure 7).
e. A. constant circulation of air and cold water supplied from the main reservoir
Figure 9, is maintained in the bed plate B of the piston. The object of this is to
protect the fittings of this latter from the action of the heat of the heater and
plate B and of the mould resting thereon.
In case the press is working intermittently, the circulation of water may be
dispensed with by interposing several layers of asbestos board between the piston
and the bedplate B' of the press.
4. The finishing apparatus, Figure 8, which resembles a planing machine for

page_text: working metals. It has a fixed frame B2, a movable carriage C" and an automatic
belt shifting fork for reversing the movement at the end of each course.
The only
special arrangement consists in the use of two cylinders, D', pivoting on supports,
which latter are capable of sliding in the two parallel sides E of the frame; these
cylinders are arranged above the movable carriage C³, and may be raised or
lowered by hand by means of a flywheel F.
If it be a question of reproducing simple designs, the hydraulic press can be
employed by itself as the finishing apparatus. In that case, it is employed for
giving the piece of wood a strong pressure by means of the mould A', this latter
being applied cold.
5. Water reservoirs of various capacities, see Figures 9, 10 and 11, which are
provided externally with a graduated scale along which a counter weight P travels
connected by means of a cord to a float which shows the level of the water inside
the reservoir.
The first reservoir, Figure 9, is supplied by means of a pulsometer or any other
suitable lifting apparatus and supplies water to two other reservoirs, Figures 10
and 11, placed at a lower level. The second reservoir, Figure 10, is fed by means
of a tube S from the first reservoir, Figure 9, and, in its turn, furnishes water to the
pump, Figures 1 and 2, by means of a tube S³. The third reservoir, Figure 11, is
in its turn supplied by means of the tube S' from the first or principal reservoir.
The water contained in the third reservoir, Figure 11, is heated by means of a
steam coil or by means of any other suitable apparatus. A sufficient quantity of
caustic soda is dissolved therein to form a solution of 1000. A short branch
pipe S, which receives cold water by means of a tube S² from the first reservoir,
Figure 9, connects with a tube S at the bottom of this third reservoir, Figure 11,
through which the contents of the latter flow away.
In this manner, by means of suitably arranged taps, the temperature of the
caustic soda solution may be regulated as desired.
6. An inclined table, shown in Figure 12, which serves for the washing of the
finished article when it is removed from the roughing out press, Figure 5.
7. A series of brushes, Figures 13, 14 and 15, which are used for cleaning and
polishing the wood.
The first of these brushes is used by hand. It is formed of very stiff vegetable
fibres (roots). The second brush is circular in form and is also formed of very
resistant vegetable fibres; it is mounted on a single shaft with another similar
brush, and this shaft receives its motion by means of a pulley. The third brush
may also be equally well employed coupled on the same shaft with another similar
brush; it only differs from the second brush in having its fibres made of very strong
pig's or other animal's bristles.
8. A mould, Figure 16, which is employed cold, and is made of cast iron, bronze,
steel or other suitable metal.
It reproduces on its upper surface the shape of the plaster model which
represents the design or pattern which it is desired to reproduce. On its rear face
it has a longitudinal groove which serves as a guide when it is fitted in the finishing
machine, Figure 8. The longitudinal projection along the centre of the movable
carriage C2 of the finishing machine fits into this groove.
This mould must be made or tooled with great care in order to remove any
trace of defects in casting and to insure a perfect identity between the plaster
model and its negative, that is to say, the mould in question. It is in order to
obtain a more perfect sharpness for the mould, that it is preferable to employ bronze
or steel for the manufacture of the same.
9. A. mould A, Figure 17, which is to be used hot.
This is of similar metal to the one used for the cold mould A¹.
The mould A, Figure 17, which is used hot, must be cast from the mould A'
which is used cold and which is taken as the model. The result is, that after a
careful tooling, the final dimensions of the two moulds present a difference which
exactly corresponds to the influence of the different temperatures at which they are

page_text: intended to be used. This mould A has on its rear side longitudinal grooves about
6 centimetres in depth intended to concentrate the heat developed by the furnace
plate B, Figure 6. Two transverse grooves arranged on the same side are intended
to receive two ridges n' formed on the furnace plate B, Figure 6, in the mould A
which is to be used hot, corresponding to the most recessed parts of the pattern,.
small circular holes of about 3 millimetres in diameter are arranged which are
prolonged until they meet other holes of about 8 millimetres in diameter, which
run transversely; these holes or channels serve to allow the smoke and gaseous.
products to escape which are developed by the contact of the compressed wood.
with the heated mould.
In the side faces of the two moulds A A', square holes are formed of about
4 centimetres side measurement and 7 centimetres in depth, serving for the insertion
of iron bars by means of which the workmen may shift the moulds.
Care must be taken that a thickness of metal of at least 2 centimetres for the
mould which is used cold, and of at least 5 centimetres for the mould which is used
hot, remains intact between the lower face of the mould and the deepest recessed:
point of the design. In order to avoid oxidation of the mould A, care must be
taken to allow it to cool in a sand bath.
To the apparatus and machines hereinbefore enumerated, there must be added
10. A pulsometer or other suitable lifting apparatus, supplying water to the first.
or main reservoir, Figure 9:
11. A steam air compressing apparatus for supplying air to the heating plate,.
Figure 6, and also for providing a jet of hot air for the purpose of cleaning the
mould, Figure 17, by removing the charcoal which may adhere thereto each time
that a fresh piece of wood is subjected to the pressure.
Having thus described all the apparatus and machinery employed, with the
exception of the motor and the power transmitting apparatus, the mode of working
of these parts will now be explained, in which also the novelty of this process.
exists.
After having adjusted the accumulator in the manner herein before described, the
mould A, Figure 17, which is to be heated, is placed on the heating plate B,.
Figure 5, and it is heated by means of the flames emerging from the series of gas
tubes g g herein before described, and fed by the current of air supplied by the
compressor. These flames play upon the lower or under side of the furnace plate B.
as well as its sides, and raise its temperature to a dull red. The taps and the
current of air are then adjusted in such a way as to maintain a constant temperature..
The object may be attained by placing on the heating plate B a mould, Figure 5,
previously heated to a suitable temperature, in a reverberatory furnace, which may
contain several moulds at a time. In this case, gas need only be used for main-
taining the initial temperature, or even it can be entirely dispensed with, and the
moulds A replaced as they become cool by other moulds just drawn from the
furnace.
As soon as the mould A, Figure 17, placed on the heating plate has reached a
dull red heat, a piece of wood a of suitable dimensions is selected and placed on the
mould A. By operating the lever 1, the heating plate B is immediately raised until
it presses against the upper support D, after which the handwheel m is rapidly
revolved so that the wood is gripped between the jaws which are arranged for this
object; the lever is then again operated in order to detach the mould A from the
wood. The lever / continues to be operated in such a way that the piece of wood
receives from the mould A a series of successive impressions at rapid intervals,.
jerky blows, so to speak, until the design which it is desired to reproduce has
penetrated into the wood to a depth of about 1 centimetre. After that, by
revolving the handwheel m in the opposite direction to that of its previous rotation,
the piece of wood x is removed in order that it may undergo a preliminary cleaning
by means of the first brush, Figure 13, and then a second cleaning by means of the
other circular revolving brushes, Figure 14, which are pressed strongly against the
wood.

page_text: The piece then undergoes the operations just described afresh, which are repeated
in the same way until the impression of the mould has been completely reproduced
in the wood. Before replacing one piece of wood on the mould with another, the
mould is cleaned by causing a current of hot air furnished by the compressor to
impinge upon it.
When the mould A has embossed its pattern on the piece of wood a to the desired
extent, the latter is again cleaned by the series of brushes, Figures 13 and 14, and
it is then placed on the inclined table, Figure 12, and washed by means of water
supplied by means of a hose nozzle, g², from the third reservoir, Figure 11. The
first washing is done with a solution of caustic soda dissolved in hot water, in the
proportions herein before stated. It then undergoes a subsequent washing in cold
water, care being taken to brush it at the same time with the first of the series of
brushes, Figure 13, until the soot and charcoal are entirely removed, and the wood
has resumed its natural colour.
When the piece of wood & has been thoroughly washed, it is allowed to dry in
the shade in order to prevent it warping, and then conveyed to the finishing
apparatus, Figure 8, and placed on the mould A' fixed to the movable carriage C²
of the same.
This carriage having been set in motion, the pressure exercised by
the cylinders D' on the mould A¹ is regulated as may be required by means of the
handwheel F. This operation allows of the most minute details of the plaster
model which was used for casting the mould A¹ being reproduced. The polishing
is performed by means of the bristle brushes, Figure 15, hereinbefore mentioned,
against which the wood is lightly pressed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
1. An improved method for the mechanical reproduction, on wood, of figures,
intaglios, bas reliefs, and the like, consisting of the simultaneous application of
pressure and heat, cleaning with brushes, washing with a hot solution of caustic
soda, and again with cold water, drying, finishing by further pressure under a
second mould without heat, and finally polishing with brushes, substantially as
hereinbefore described.
2. An apparatus for the mechanical reproduction, on wood, of figures, intaglios,
bas reliefs, and the like, comprising a hydraulic press receiving power from a pump
and accumulator, gripping device D, furnace plate B and means for heating same,
mould A grooved on its rear side and having perforations, bed plate B', cleaning
and polishing brushes, reservoirs P, P, P, mould A' and a finishing machine, all
substantially as and for the purposes described and shown.
3. In a press for use in the mechanical reproduction, on wood, of figures,
intaglios, bas reliefs and the like, the furnace plate B and its heating device and
the bedplate B¹ and its cooling device, substantially as described and shown.
Dated this 14th day of February 1894.
WM. P. THOMPSON & Co.,
Agents.