AN IMPROVED WOOD PLANING MACHINE
Year: 1884

page_text: COMPLETE SPECIFICATION.
I, JAMES PEIRCE, of 28 Park Street, Dorset Square, in the County of Middlesex,
Engineer, do hereby declare the nature of my invention for "AN IMPROVED
WOOD PLANING MACHINE," and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement:—
The object of my invention is the production of an improved wood planing
machine, and refers more particularly to the method of raising and lowering the
tables, and to the construction and lubrication of the cutter.
In order that my invention, and the means whereby the same can be put into
successful operation, may be thoroughly understood, I will now proceed to describe
them in detail, referring to the accompanying drawings which are to be taken as
part of this specification and read therewith, and in which corresponding parts are
inarked throughout the figures in which they occur with the same reference letter.
Figure 1 is a longitudinal elevation, partly in section.
Figure 2 is a plan of one slide.
Figure 3 is a sectional elevation of the cutter.
Figures 4 and 5 are, respectively, section and plan of the knife.
Figure 6 is an end elevation, partly in section, corresponding with Figure 3.
A is the frame of the machine, and B and B¹ the tables. C is the cutter; c, c,
the knives; c, the spindle; and D its bracket. Each table is fitted so as to be
capable of being raised or lowered by a slide, E, .which has formed on its upper
surface four inclined planes, F, working against corresponding planes, G, formed on
the under surface of each table. Each slide is actuated by a hand wheel, H, and
screw, I, conveniently mounted on the frame of the planer. It is immaterial for
the purpose of my invention whether the planes F and G are inclined to the right,
or left, hand. Both tables are fitted with slide and hand wheel, although only one
is shewn so in Figure 1.
The table, B¹, is adjusted to be level with the cutting edge of the knife, and the
table B, relatively to B¹, so that the difference in level decides the quantity of stuff
to be planed off.
It is clear that the use of the slide actuated by the screw gearing permits of a
very nice adjustment of cut being easily obtained.
Instead of mounting the knives c, c, upon a solid block, their bevelled ends c³, c²³,
are embraced by two collars, c³, c³, the one being an enlargement of the spindle,
and the other a loose one held up by a nut, d. Each knife is further held by a

page_text: tightening screw, c, entering a boss, e, formed on the spindle. This construction of
cutter secures great lightness, which allows of high speed without mischievous
vibration, as well as allowing of the cutter being made of a smaller diameter than
heretofore, resulting in a more efficient cutting angle being secured. The central
spaces between the knives allow the shavings to get away freely.
Each knife, c, has two edges, and is, accordingly, reversible.
The spindle, c', and pulley, K, are of the usual construction. L, L, are two
projecting oil chambers or grease cups, access to which is provided for by long
caps, M, M. Both cups and caps are unusually long, so that by screwing the caps
up, the lubricating material is always under pressure against the spindle bearings,
whereby efficient lubrication is secured, even when the planer is working at a high
speed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
First. In a wood planing machine, the combination of four inclined planes, in
the under face of each table, with four corresponding planes upon a slide, actuated
by a handwheel or equivalent device, as described with reference to the
accompanying drawings.
Second. In a wood planing machine, the combination of two double edged and
reversible knives c, c, central boss e, and two collars c³, c³, producing a light
hollow cutter, of small diameter, as described with reference to the accompanying
drawings.
Third. In a wood planing machine to be run at a high velocity the projecting
nozzles of the grease cups, L, L, filled with long screw caps, M, M, as described with
reference to the accompanying drawings.
Tied him to
1001