Year: 1887

page_text: Date of Application, 4th May, 1887..
Complete Left, 23rd Jan., 1888.
Complete Accepted, 4th May, 1888
I, THOMAS HENRY MARTIN, of Tresleigh House, Walters Road, Swansea, in the
County of Glamorgan, Wales, Engineer, do hereby declare the nature of this invention
to be as follows :—
.
My double acting Rest and Tool holder are designed to enable an ordinary hori-
zontal metal planing Machine to cut both ways instead of only one way as is now
usual, and my improvements are applicable to other Machines with travelling cutters,
which plane or cut metal horizontally or at an angle, and for similar purposes.
My improvements consists of a special flapping tool box and tool stock or holder, as
hereinafter described.
The cutting tool is fixed to the tool stock in the usual way.
It has two cutting edges one on each of two opposite sides of its cutting face, so
that it is only necessary to alter its inclination at the end of each stroke and it is then
ready to commence cutting on the return stroke. This reversal of the cutting tool is
effected by the self-acting feed to the cross slide at the over-run, at each end of the
stroke by the belt striking gear of the feed motion, moving a cord or chain running
over a pulley wheel, the said pulley wheel moving a crank rod, which by a forward
and backward motion changes the inclination of the tool stock and tool attached to it.
"cowl"
The reversal of the tool can also be effected by a travelling wheel or
running on a rod with a shunt, something on the same principle as a rifling bar.
The tool can also be reversed by means of a cross spindle, pinion and quadrant, or
by springs, and in choosing the method of effecting the reversal, much will depend
upon the construction of the planing or cutting machine on which it is to bo
employed.
The cutting tool is bolted to a special tool stock which oscillates freely to and fro
on the flapping tool box by means of slots forming segments of a circle, which slots
work on bolts or pins, projecting from the tool box; or the tool stock may be pivotted

page_text: in its centre to the tool box or caused to oscillate thereon in any other way preferred.
The amount of oscillation is carefully regulated so as to ensure the proper position of
the tool for uniform cutting in either direction, and the tool is adequately supported
by stops on either side.
The flapping tool box differs from the ordinary kind mainly in being arranged so
as to allow of the oscillation of the tool stock and tool as above described.
S. S. BROMHEAD,
97, Newgate Street, E.C.,
Patent Agent.
COMPLETE. SPECIFICATION.
A Double, Acting Tool and Tool Box for. (Metal) Planing and
Cutting Machines.
I, THOMAS HENRY MARTIN of Tresleigh House, Walters Road, Swansea in the
County of Glamorgan 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 :-
My double acting Rest and Tool holder are designed to enable an ordinary hori-
zontal planing machine for planing metal, to cut both ways
instead of only one way
as is now usual, and my improvements are applicable to other machines with travelling
cutters which plane or cut metal sideways or at an angle, and for similar purposes.
My improvements consist of a special flapping Tooi-box A, and oscillating tool
stock or holder B, to which the tools are firmly bolted, so that they oscillate freely
against the butts. D, in back and in front of Tool-box A. These Butts D take up the
strain of backward and forward cuts.
The cutting tool may either be single with a double cutting edge, that is to say a
cutting edge on either side as C, or there may be two cutting tools placed side by side
as with their lower ends so bent as to follow in the same track, or the two single
tools may be placed back to back as C, the cutting edge being set at such a convenient
angle from the stem that when cutting in either direction the hindermost tool clears
the work. This arrangement of two tools is I find preferable in most cases to the
single tool C, and especially so for finishing cuts, when, if it is desired to ensure great
accuracy, one tool only of the two so paired together can be used for the time being.
In all cases when planing, the edge of the non-cutting tool is tilted up clear of the
work while the other is performing its cut, and all rubbing of edge is thus prevented

page_text: W
X X
Y
are the slots in adjustable slotted bar M.
trunnions.
"
"
"
"
bolts for securing T to I.
15 centre pin on which stock T turns.
"
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
1. In a machine for planing or cutting metal the use of the special backward and
forward cutting action with reversing motion of the tool or tools as herein described
and set forth.
2. In a machine for planing or cutting metal the use of a tool with two cutting
faces or of two tools set back to back or side to side with cutting edges turned in
opposite directions in combination with a reversing motion as herein described and
set forth.
3. In a machine for planing or cutting metal the vertical sliding box or rest A as
adapted to receive the oscillating tool-holder B, the vertical lever F the bar E, the
two stops J J the cutting tools CCC as herein described and set forth.
S. S. BROMHEAD,
97, Newgate Street, E.C.,
Patent Agent.
2