Improvements in Wood Planing or Cutting Machines.
Year: 1888

page_text: Date of Application, 21st Nov., 1883
Complete Specification Left, 20th Aug., 1889-Accepted, 21st Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Wood Planing or Cutting Machines.
I, DAVID THOMSON, of Laigh Cartside Engineering Works, Johnstone, in the
County of Renfrew, North Britain, Engineer, do hereby declare the nature of this
Invention to be as follows, that is to say :-
.
My said Invention has for its object, by means of improved machinery to effect in
a rapid and satisfactory manner the planing or cutting of comparatively thin boards
suitable for making boxes and various other articles.
In a machine made according to one modification of my Invention the planing
iron or cutter or set of cutters is adjusted in a stationary holder in a manner to
operate on the under sides of the boards which are successively moved over it by a
sliding frame made to travel to and fro by a rotating crank or other convenient
nechanism. Close to the inner side of the cutter there is a feed box in which the
boards to be planed are put, and in which they are, by a weighted lever or other
appliance, made to rise as they are successively removed. The sliding frame is made
with a recess at its underside which recess is directly over the pile of boards when
the frame is at one end of its traverse. The depth of the recess corresponds to the
thickness of one board which rises up into it and is carried over the cutter by the
traverse of the frame being dropped when carried beyond the cutter.
The sliding frame has fitted in its recess a plate which can be adjusted for different
thicknesses of board. This plate may have a sheet of rubber upon its under side, and
the adjusting screws may be fitted with springs, to allow the board to yield when
any inequality or obstruction occurs. The top edge of the feed box over which
edge each board passes on to the cutters is bevilled to prevent the bottom edge of the
board catching against it.
The modification hereinbefore described is constructed for planing previously sawn
boards, but when the boards are to be thin, say about inch thick, the machine may
be modified so as to cut them directly off a block without previous sawing. In the
modified machine a flat cutting blade is substituted for the inclined plane iron, its edge
being by preference inclined in plan, and the block to be cut from is carried by
the reciprocating sliding frame, being set step by step downwards after each thickness
is cut off.
Dated this Twentieth day of November 1888.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Wood Planing or Cutting Machines.
I, DAVID THOMSON, of Laigh Cartside Engineering Works, Johnstone, in the
County of Renfrew, North Britain, 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, that is to say :-
My said Invention has for its object, by means of improved machinery, to effect
in a rapid and satisfactory manner the planing or cutting of comparatively thin boards
suitable for making boxes and other articles.
A machine made according to my Invention is shown upon an accompanying
sheet of explanatory drawings, figure, 1, being a plan, figure, 2, a side elevation, and
figure, 3, a longitudinal vertical section. In these drawings the same reference letters
are used to mark the same or like parts wherever they are repeated.

page_text: The framing of the machine consists of two side frames, A, B, suitably connected
together, one being made with an extension, C, which with a separate frame, D, carries
a first motion shaft, E, provided with fast and loose pulleys, F, for a driving belt. A
pinion on the shaft, E, gears with a spurwheel, G, on a second-motion shaft, H.
The planing iron or cutter, or set of cutters, J, is adjusted in a stationary holder, K,
in a manner to operate on the undersides of the boards, which are successively moved
over it by a sliding frame, L, made to travel to and fro horizontally, in guides formed
on the side frames, A, B, by a connecting rod, M, jointed to it and to a crank pin
on the spur wheel, G. Close to the inner side of the cutter, J, there is a feed box, N,
in which the boards, P, to be planed are put, and in which they are made to rise as
they are successively removed from the top of the box. The box is fitted with a
movable bottom, Q, which is suspended by chains, R, passing over guide pulleys, S,
to barrels, T, on a shaft, U, having on it another barrel on which is wound a chain
connected to a weight, V. This weight, V, raises the feed-box bottom, Q, and when
a fresh quantity of boards is to be put in the box the shaft, U, is turned by means
of a winch handle on it so as to lower the bottom, Q.
The sliding frame, L, is made with an opening in which there is fitted a movable
frame or plate, W, having a recess formed on its under side. This recess of the
plate, W, is directly over the pile of boards, P, when the frame, L, is at one end of
its traverse; and the depth of the recess corresponds to the thickness of one board
which rises up into it and is carried over the cutter, J, by the traverse of the frame, L;
the board being dropped when carried beyond the cutter.
The plate, W, in the sliding frame, L, can be adjusted for different thicknesses of
board by means of screws, X. A sheet of rubber may be fixed in the recess in the
plate, W, and the adjusting screws, X, may be fitted with springs as shown to allow
the board to yield when any inequality or obstruction occurs. The top edge of the
feed box, N, over which edge each board passes on to the cutter is bevilled or recessed
to prevent the bottom edge of the board from catching against it.
The modification of my improved machine which has been described is constructed
for previously sawn boards, but when the boards are to be thin, say about inch
thick, the machine may be modified so as to cut them directly off a block without
previous sawing. In the modified machine a flat cutting blade is substituted for the
inclined plane iron, J, its edge being by preference inclined in plan, and the block to be
cut from is carried by the reciprocating sliding frame, being set step by step downwards
after each thickness is cut off.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
The combination of parts constituting my improved wood planing or cutting
machine substantially as hereinbefore described and shown on the accompanying
drawings.
Dated this Seventeenth day of August 1889.
EDMUND HUNT,
Applicant's Agent.