Improvements in Firewood-making Machinery.
Year: 1893

page_text: Date of Application, 8th Feb., 1893
Complete Specification Left, 7th Oct., 1893-Accepted, 30th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Firewood-making Machinery.
ROBERT JAMIESON Venetian Blind Maker WALTER JAMIESON Student
7 Orangefield, Greenock Scotland do hereby declare the nature of this invention
to be as follows:-
Our invention consists in the combination in a firewood-making machine operated
by a crank and connecting rod, and having a mechanism for feeding the blocks to
be cut gradually in to the cutting knives, of a block of iron fixed to the end of
said connecting rod, and moving in slots in an upright frame. This block of iron
is free to move a short distance from side to side, said movement being accomplished
by two sets of wedges, also working in said slots, one set on either side of the
block of iron. Each set of wedges consists of two wedges, one fixed to upright
frame, the other moving upwards and downwards, said motion being effected by a
cam. Said cam is operated by pinion wheels driven by main shaft, and so arranged
that the wedges make but one motion; in the case of the one wedge upwards, in
that of the other on the opposite side of the block, of iron, downwards, in every
second revolution of the crank spoken of above. The motions of the wedges are
such, that while one moves up, the other moves down, thus producing the lateral
motion of the block of iron. To the block of iron are fixed long " gouges," so
form the cutters, by
arranged as to be a short distance apart. These "gouges
which the firewood is cut said firewood being of crescent shape.
The novelty of our invention consists in the using of said gouge shaped knives,
or "long gouges," and in the lateral motion given by the wedges to them, in order
to cut out the pieces of the block (which is being cut) which are left owing to the
gouge-shaped knives or "long gouges being, as was said above, a short distance
apart.
"
L 1 1802
"
ROBERT JAMIESON.
WALTER JAMIESON.
COMPLETE SPECIFICATION.
Improvements in Firewood-making Machinery.
ROBERT JAMIESON Venetian Blind Manufacturer WALTER JAMIESON Pupil
Teacher 7 Orangefield Greenock N.B. do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:
1
Our invention consists in the combination in a firewood-making machine operated
by a crank and connecting rod, and having a mechanism for feeding the blocks of
wood to be cut gradually in to the cutting knives, of a block of iron fixed to the
end of the said connecting rod and moving in slots in an upright frame. This
block of iron is free to move a short distance from side to side, said movement
being accomplished by two sets of wedges also working in said slot, one set on
either side of the block of iron. Each set of wedges consists of two wedges, one
fixed to the upright frame, the other free to move upwards and downwards in the
slot, said motion being effected by a cani. The cam is operated by pinion wheels
driven by the main shaft and so arranged that the wedges make but one motion, in
the case of the one wedge upwards, in that of the other, downwards, in each revolution
of the crank spoken of above. The motions of the wedges are such that while one
moves up the other moves down, thus producing the lateral motion of the block of

page_text: iron. To the block of iron are fixed long gouges so arranged as to be a short
distance apart. These gouges form the cutters by which the firewood is cut.
DESCRIPTION OF DRAWINGS.
·
Fig. 1 is a sectional front elevation, Fig. 2 is an end sectional elevation. A is
the block of iron to which the gouges K. K. are securely fixed by means of the
plate L. M is the.space through which the block A can move laterally. C and
D.are the wedges fixed to the side of the frame B (as shown in Fig. 2). Fand
G are the wedges which are free to move vertically, upwards and downwards.
They are connected by means of the lever arrangement T. The wedge F is con-
nected to the cam by the rods R. In Fig. 2 the front elevation of the cam O,
and the pinion wheels which actuate it is shown. The cam O moves up and down
in a framework, not shown for sake of clearness in the drawing. The-cam-O-is
driven, up and down by the small wheel S, which is attached to a rod projecting
from the larger pinion wheel and bolted to it in the manner shown in the drawing.
When the pinion wheel (which revolves at half the speed of the crank) is revolving,
it carries the wheel S with it. The wheel S engages with the cam O and lifts it
up a short distance. But the curves of the cam Ŏ are arcs of the circle which the
wheel S is describing, so that while the wheel S is traversing the upper curve of
the cam, the cam moves neither up nor down. When the wheel S arrives at the
end of the upper curve of the cam O it forces the cam down a short distance, but,
as the lower curve is an arc of the circle which the wheel S is describing, there is
no motion of the cam while the wheel S traverses the lower curve. Now the lengths
of the upper and lower curves are so arranged that the cam is at rest while the
crank describes half a revolution; it is moved up a short distance during the
remaining half of the revolution of the crank; it again remains at rest for half a
revolution, and is moved down during the next half revolution. The purpose' of
the above cycle of motions, which are communicated to the wedges by means of
the rods R, is as follows.. It is important that the knives or cutters K. K. should
not move laterally while actually cutting the wood; the cam therefore and the
wedges are at rest during the half revolution of the crank in which the knives are
cutting the wood. When the knives or cutters come out of the wood, the cam is
raised, as before stated, and the motion being communicated to the wedges, the
block carrying the knives is moved laterally through the distance M. In the next
half-revolution the block A descends, and the knives K K cut out the part left
(from the last stroke) owing to the knives being necessarily a short distance apart.
The block of wood being cut is now fed forward a short distance during the
remaining half-revolution, the block A with the knives again descends and the
same action as before described is repeated.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
(1.) The use of gouges or gouge-shaped knives for cutting the firewood.
(2.) The use of combinations of wedges to give a lateral motion to the said
gouges, for the purpose herein before described.
Dated this 5th day of October 1893
ROBERT JAMIESON.
WALTER JAMIESON.