IMPROVE- MENTS IN CUTTER BLOCKS FOR MOULDING MACHINES
Year: 1876

page_text: LETTERS PATENT to Francis Rowland Clarke, of No. 24, Belmont Street,
"
Heaton Norris, in the County of Lancaster, for the Invention of "IMPROVE-
MENTS IN CUTTER BLOCKS FOR MOULDING MACHINES."
PROVISIONAL SPECIFICATION left by the said Francis Rowland Clarke at
the Office of the Commissioners of Patents on the 11th September 1876.
FRANCIS ROWLAND CLARKE, of No. 24, Belmont Street, Heaton Norris, in the
County of Lancaster. "IMPROVEMENTS IN CUTTER BLOCKS FOR MOULDING
MACHINES
"
My Invention relates to an improved construction of cutter blocks for moulding
machines, more particularly applicable to the class known as vertical moulding
machines, whereby I am enabled to reverse the motion of the cutter block, so as to
bring a second cutter into action to suit the grain of the wood. For this purpose
the cutter spindle has an excentric formed or fixed upon it which fits a circular hole.
in the cutter block, the excentric being free to turn in either direction in the block
a certain distance, which is limited by a stop The cutter block carries cutters
whose cutting edges are set to cut in opposite directions, the cutting edges of cach
set being equidistant from the centre of the hole in the block.
The spindle with its excentric is so arranged in relation to the cutters that on
being turned in one direction it causes the set of cutting edges, which are then
brought into action, to project farther from the centre of the spindle than the other
set of cutting edges, thus keeping the latter clear of the wood On reversing the
spindle, to bring the second set of cutting edges into action, these are in their turn
made to project more than the first set.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Francis Rowland Clarke in the Great Seal-Patent Office on the 20th
November 1876.
FRANCIS ROWLAND CLARKE, of No. 24, Belmont Street, Heaton Norris, in the
County of Lancaster.
MACHINEQ"
IMPROVEMENTS IN CUTTER BLOCKS FOR MOULDING

page_text: My Invention relates to an improved construction of cutter blocks for moulding
machines, more particularly applicable to the class known as vertical moulding
machines, whereby I am enabled to reverse the motion of the cutter block, so as to
bring a second cutter into action to suit the grain of the wood. For this purpose
the cutter spindle has an eccentric formed or fixed upon it which fits a circular hole
in the cutter block, the eccentric being fiee to tuin in either direction in the block
a certain distance, which is limited by a stop. The cutter block carries cutters
whose cutting edges are set to cut in opposite directions, the cutting edges of each
set being equidistant from the centre of the hole in the block.
The spindle with its eccentric is so arranged in relation to the cutters that on
being turned in one direction it causes the set of cutting edges, which are then
brought into action, to project farther from the centic of the spindle than the other
set of cutting edges, thus keeping the latter clear of the wood. On reversing the
spindle to bring the second set of cutting edges into action these are in their turn
made to project more than the first set.
On the accompanying Sheet of Drawings is shewn one arrangement of my before-
described improved construction of cutter blocks.
Fig 1 shews a vertical section and Fig. 2 shews a plan. The cutter spindle A
carries an eccentric B fixed or formed thereon, fitting loosely in the hole of the
cutter block C, and having a feather B¹ situated in a recess C¹ in the back side of
the block, so that the spindle and eccentric can be turned in the block in either
direction to an extent limited by the width of the recess C¹
The block is held
upon the eccentric between two collars D, D¹, and carries two cutters E, E¹,
the cutting edges of which are equidistant from the centre of the hole of the
block.
The greatest eccentricity of the eccentric being at the back of the cutter block, in
line with the feather B¹, it will be seen that when the spindle and eccentric are
turned so as to cause the cutters to revolve in the direction of the arrow, Fig. 2, in
which case the cutter E is brought into action, the cutting edge of the latter will
be made to project farther from the centre of the spindle A than the cutting edge
of E¹, as indicated by the dotted circle F' representing the path of the cutter E, and
thus the cutter E¹ will revolve clear of the surface of the wood acted upon by E.
When the motion of the spindle and eccentric is reversed, in order to bring cutter E¹
into action, the feather will move round in the groove until it comes in contact with
its other edge, whereupon the block will be diven round in the direction contrary
to that of the arrow, and the changed position of the eccentric will cause the cutting
edge of E¹ in its turn to project farther from the centre of the spindle than that
of E.
Having thus described the nature of my Invention and in what manner the same
is to be performed, I claim, the use of cutter blocks fitted upon an eccentric on
the cutter spindle in such manner that when the spindle is rotated in one direction
the cutter or set of cutters that is then brought into action are made to project
more than another cutter or set of cutters that is brought into action when the
motion of the cutter block is reversed, substantially as and for the purposes herein
described.
In witness whereof, I, the said Francis Rowland Clarke, have hereunto set my
hand and seal this Fourteenth day of November in the year of our Lord
Witness,
A. MACDONALD BLAIR,
Solicitor,
9, St. James's Square,
Manchester.
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F. R. CLARKE. (L.S.)