IMPROVEMENTS IN MACHINERY FOR CUTTING WOOD
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by the Baron Thornton de
Mouncie at the Office of the Commissioners of Patents, with
his Petition, on the 25th March 1873.
I, The Baron THORNTON DE MOUNCIE, of Paris, France, now of
Denmark Hill, in the County of Surrey, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MACHINERY FOR CUTTING WOOD,"
to be as follows:-
My Invention relates to a machine for cutting wood into boards, slabs,
or veneers of any required thickness.
The distinguishing feature of the said Invention is the employment of
a blade which has a straight sharp edge, that is to say, it is not toothed
or serrated; the said blade has a rectilinear movement perpendicular to
the rectilinear movement of a carriage carrying the wood to be cut.
My said machine is constructed with a strong frame of cast iron or
other suitable material which has vertical guides for the aforesaid blade
to work in, the said table is arranged to move to and fro horizontally on
suitable ways, and is connected by a nut to a screw shaft, whereby it is
operated; this shaft is geared at its ends by bevil pinions with two

page_text: vertical screw shafts which raise and lower the aforesaid blade, these
parts are so arranged and combined that the descent of the said blade
takes place when the travelling table moves forward. The said table is
provided with a projecting arm which is arranged to come in contact
with a stop on a connecting rod attached to a counterpoised lever; the
latter is fixed on a shaft whose extremity operates another lever arranged
to act on a sliding sleeve on the screw shaft that operates the table.
The said sleeve has fixed on it two conical driving pulleys arranged to
fit within the conical rims of two other pulleys, and controlling the same
by friction alone; these pulleys are driven in opposite directions by
straight and cross belts. This arrangement is very advantageous and
permits me to avoid the employment of two fixed and two loose pulleys
which would require great attention in changing the motion.
My improved machine is also provided with a brake, whereby the
said machine may be instantaneously stopped, this brake consists of a
screw shaft furnished with a handle at one end and a flat lance shaped
piece at the other; this piece is fitted into a box through which passes the
shaft that is connected with the aforesaid sleeve lever, the latter is thereby
operated to set the aforesaid sliding pulleys midway between the belt
pulleys which will then both run loose on their shaft. The said table or
carriage is furnished with mechanism for moving the wood to be cut the
proper distance to give the required thickness of the boards, slabs; or
veneers; this mechanism has a roller arranged to run upon an inclined
planc; the said pulley in mounting causes the rising of a rod furnished
with a spring for returning it to its first position, to this spring rod is
secured a connecting rod fixed at one end to a two armed lever which
carries pawls taking into ratchet wheels; the latter are keyed on a shaft
upon which is also keyed a toothed wheel which gears into a pinion fixed
on a shaft that carries a chain wheel; from this chain wheel a chain
extends to another wheel of the same diameter at the other end of the
țable or carriage so that the wood will be caused to advance uniformly.
The boards, slabs, or veneers cut by my improved machine will be
made smoother thereby and will not require subsequent planing or
smoothing.