Improvements in Wood-working Machinery.
Year: 1885

page_text: Improvements in Wood-working Machinery.
We, SAMUEL INGHAM, of Wellington Street, Leeds, in the County of York,
Timber Importer; WILLIAM ILLINGWORTH, of the same address and occupation;
and JOSEPH WILLIAM HAYWOOD, of Burley Lawn, Leeds, in the County of York,
Saw-mill Manager do hereby declare the nature of our invention for IMPROVE-
MENTS IN WOOD-WORKING MACHINERY, to be as follows:-
Our invention has reference to an improved Pressure-block, used in Wood planing
and moulding machinery for the purpose of pressing the wood down on to the
table when acted upon by the cutters.
The fault of pressure-blocks as at present made and applied consists in their
being large and clumsy; they have, therefore, to be placed at a greater distance
from the cutters than would otherwise be necessary, and this distance increases the
length of the waste ends of wood.
The object of our invention is to reduce the lengths of the wasted ends to a
minimum.
We put our invention into practice as follows:-On a planing or moulding
machine, having its revolving cutter-bar above the table, we hinge our pressure-
block so that its fulcrum is concentric with the cutter-bar. We obtain this fulcrum
by continuing in the form of sleeves-the bearings, in which the cutter-bar
revolves, on each side of the machine, in such a manner that the pressure-block may
binge on them without touching the revolving bar.
This fulcrum forms the only fixing of the pressure-block, an arm of which block
is made to extend outwards in a direction somewhat horizontal so as to carry a
weight for giving the necessary pressure. The important part of the block extends
downwards in a direction more or less concentric with the cutter bar-but quite
clear of the revolving cutters-and terminates in a renewable end or toe, close up
to but not touching-the edge of the revolving cutters.
From this description it will be understood that however high the pressure block
may be lifted upwards, or however much it may be depressed the toe of the block
will always remain at the same distance from the edge of the revolving cutters-
however close the adjustment may be and no fear of actual contact need be
apprehended in raising or lowering the block.
Pressure blocks of this description may be fixed fore and aft of the cutter-bar,
the same projecting sleeves serving for a fulcrum for each.
Dated L
2 T
3000
WILLIAM SNOWDON,
Agent for the Applicants.

page_text: We, SAMUEL INGHAM, of Wellington Street, Leeds, in the County of York,
Timber Importer; WILLIAM ILLINGWORTH, of the same address and occupation;
and JOSEPH WILLIAM HAYWOOD, of Burley Lawn, Leeds, in the County of York,
Saw-mill Manager, do hereby declare the nature of our invention for IMPROVE-
MENTS IN WOOD-WORKING MACHINERY, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
'statement :-
Our invention has reference to an improved Pressure-block used in wood planing
and moulding machinery for the purpose of pressing the wood down on to the table
when acted upon by the cutters.
The fault of pressure blocks as at present made and supplied consists in their
being large and clumsy; they have, therefore, to be placed at a greater distance
from the cutters than would otherwise be necessary-& this distance increases the
length of the waste ends of wood. The nearer the pressure block can be brought
to the cutting point, the better the result, as chipping & tearing of the material is
thereby either entirely prevented, or is greatly reduced.
The object of our invention is to reduce the length of the wasted ends to a
minimum and to avoid, as far as possible, all waste from chipping and tearing,
even when an extra quick feed is arranged.
In order to fully explain ourselves we have annexed a drawing on which Fig. 1.
is a side elevation, Fig. 2. is a front elevation-partly in section-of the general
arrangment, and Fig. 3. is a plan of the pressure-block, shown detached. The same
letters refer to the same parts, or their relative positions, in all the figures.
We put our invention into practice as follows:-On a planing or moulding
machine having its revolving cutter bar A, above the table B. B. we hinge our
pressure block C. C. (or blocks-as they may be arranged fore and aft) so that their
fulcra D. D. are concentric with the cutter bar A. The fulcra of the hinder
block CC are those marked D¹ D¹.
We obtain the fulcra by continuing, say in the form of sleeves, the bearings E. E.
on each side of the machine-see Fig. 2-in such a manner that the pressure-block
may hinge on them at D. D. without touching the revolving bar A. In Fig. 2. the
arrangment is shown with the driving pulley Z. overhanging.
These fulcra form the only fixing of the pressure-block, an arm F. of which block
is made to extend outwards, somewhat horizontally, so as to carry a weight F¹ for
giving the requisite pressure.
The important part of the block extends downwards, in a direction more or less
concentric with the cutter bar-& terminates in a renewable end or toe C. C.
(preferably made of wood) as close up as desired to the edge of the revolving
cutters.
In Fig. 3. a detached pressure-block is shown in plan, complete excepting that
the arm F. is broken off."
A block may be built up in as many pieces as may be found convenient for
getting it into its place.

page_text: From this description it will be understood, speaking of a horizontal block, that
however high it may be lifted upwards, or however much it may be depressed, the
toe C. of the block will always remain at the same distance from the edge of the
revolving cutters-however close the adjustment may be-& no fear of actual
contact need be apprehended in raising or lowering the block.
Pressure-blocks of this description may, as already stated, be fixed fore and aft
of the cutter bar when required, the same projecting sleeves serving for a fulcrum
for each, as shown on the drawing.
In feeding material forward continuously under our pressure-block, the block can
rise to allow for a somewhat thicker piece to pass under, and yet this is done
without altering the distance from the cutting point, and without any possibility.
of the block rising up into contact with the cutters.
Fig. 4. shows a way of fixing sleeves on which to concentrically hinge the fulcra
where it is not practicable to do so on the bearings themselves.
In applying this arrangment of pressure-block to a cutter-head working
vertically, with no outside bearing, the best way of ensuring a steady hold of the
bearing is to make the fulcra span the bearing as shown in Fig. 6. which is an
elevation, Fig. 5. a plan, & Fig. 7. a side elevation of this same arrangment. Of
course, a spring H. or a weighted cord led over a pulley, or other device suitably
attached, has to be resorted to, to give a side thrust, instead of the weight F¹ used
in the other case.
The same way of spanning the bearing would apply to an overhung cutter-head
working horizontally.
Having now particularly described and ascertained the nature of our said
inyention and in what manner the same is to be performed, we declare that what
we claim is:-
1. The mode of hinging-concentrically with the revolving cutter bars-pressure-
blocks used in wood-working machinery, so as to enable a block to be set up as
closely as may be desired to its cutting knives, and yet permit of its position
varying without danger whilst running, with the object and for the purpose set
forth; which mode of concentric hinging is shown carried into effect in and by the
apparatus described herein, and illustrated on the accompanying drawing.
2. The mode of hinging-concentrically with their revolving cutter bars-
pressure-blocks used in wood-working machinery, with the object, & for the purpose
set forth, substantially as described herein, and as shown on the accompanying
drawing.
11000
WILLIAM SNOWDON,
Agent for the Applicants.