IMPROVEMENTS IN MACHINERY FOR SHAPING WOOD
Year: 1881

page_text: LETTERS PATENT to Horbert John Haddan, of Kensington, Middlesex, for an
Invention of "IMPROVEMENTS IN MACHINERY FOR SHAPING WOOD." A com-
munication from abroad by Alexander Wenzel, of Berlin, Germany.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 19th November 1881.
HERBERT JOHN HADDAN, of Kensington, Middlesex. "IMPROVEMENTS IN
MACHINERY FOR SHAPING WOOD." A communication from abroad by Alexander
Wenzel, of Berlin, Germany.
This Invention relates to machinery for shaping wood, and has the object to
admit of such machinery working more accurately than before.
In the machines commonly used for cutting wood into special shapes, the axis of
the revolving cutter is fixed, whereas the machinery which constitutes this Invention
has a cutter adapted to be moved up and down, and work two rows of wood
simultaneously. In the improved apparatus a pair of bevel wheels serves to turn
a nut secured to the base of the machine frame, said aut imparting up and down.
motion to a screw spindle; on this screw spindle the cutting tool is mounted, which
consists of several adjustable shaping knives secured to a revolving cutter head.
The cutter head is guided by two vertical standards and kept revolving by a pulley
mounted on the cutter shaft.
Rails and tongues (or screws and other known fastening devices) are provided at
both sides for adjusting and holding the wood while being worked, the material
being piled up in two continuous rows, thus causing accurate working of the tool.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
16th May 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex. "IMPROVEMENTS IN
MACHINERY FOR SHAPING WOOD." A communication from abroad by Alexander
Wenzel, of Berlin, Germany.
The object of the present arrangement of mechanism for dressing beams or blocks
of prismatic section is to pro luce more accurate work than that obtained by the
mechanisms hitherto used. While in ordinary machines a rapidly revolving cutter
head with fixed axis acts on a series of blocks with blanks between then and
clamped fast at their ends only, which blocks are moved against the cutter head, in
this machine the cutter head is moved against two rows of blocks which are
clamped fast at their ends and prevented from lateral dislocation by their
arrangement in continuous vertical rows.
The machine is illustrated by the accompanying Drawings, of which Fig. 1 is a
vertical section; Fig. 2 a side elevation, and Fig. 3 a horizontal section.
The machine comprises an underframe A to which are bolted four vertical guide-
rails connected at the top by a bracket b. This bracket holds a screw nut d which.
can be turned by a pair of bevel wheels c, c, thereby raising or lowering a screw
spindle e, together with a cross head f mounted on the same. This cross liend
supports by means of two bearings a rapidly revolving cutter head 9 having
adjustable knives.
The blocks to be dressed are piled up on both sides of this cutter head along the
guides a. They are held fast by movable plates h, which can be tightened by
means of movable hand-levers . As the blocks are piled in continuous rows they
cannot be bent or twisted by the up and down motion of the cutter head. The
latter attacks simultaneously the inner sides of two rows of blocks, and dresses
them in a manner depending on the shape and position of the knives. By changing
the position of the blocks all four sides may be dressed in succession.
As the up and down motion of the cutter head varies its distance from the
driving shaft, it is necessary to adopt some means for keeping the tension of the
strap constant.
To the bracket b is fixed a horizontal shaft on which is mounted a cone-pulley 1
set in motion by the over-head driving shaft. This motion is transmitted upon a
flying cone-pulley m, and from this upon the pulley n of the cutter head. The
three pulleys are connected with each other by movable rods o, so that the angle
between these rods increases during the down motion and decreases during the
up-motion of the cutter head, while the distance of the pulley & from the pulley m,
and from the latter to the pulley n remains constant.
CLAIMS.
1. The described method of dressing many-sided blocks of wood, consisting
sauli...
and down between niles of
CLAIMS.
1. The described method of dressing many-sided blocks of wood, consisting
cosentially in moving a revolving tter hond y up and down hetween piles of
blocks held fast by plates h and hand-levers i.;
2. The general arrangement of the apparatus, substantially as described and
illustrated.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Sixteenth day of May, A.D. 1882.
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