Improvements in Milling Machines for Cutting Metals.
Year: 1889

page_text: Date of Application, 1st May, 1889
Complete Specification Left, 1st Feb., 1890-Accepted, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Milling Machines for Cutting Metals.
We, GEORGE COLLETT, of the firm of William Heap and Co., of Ashton under
Lyne, Lancashire, Engineers Tool Makers, and JAMES HOLLINGWORTH, of the firm of
Hutchinson Hollingworth and Co Limited, of Dobcross, Yorkshire, Power Loom
Makers, do hereby declare the nature of this invention to be as follows:-
In
Our invention has reference to milling machines employed for cutting metals
this class of machine the cutter spindle is carried at one end by a headstock, and at
the other end by a fixed radial arm cast to the headstock, but such fixed radial arm
is an impediment when cutting certain forms and shapes of ironwork. To obviate
this, and to make the machine adaptable to act upon different shapes and sizes of
metal, we propose to make the radial arm so that it can revolve or oscillate in order
to alter its position; and to carry out our invention, the radial arm and headstock
are now cast separately, and we make the headstock with a flange having an annular
groove formed in it; we also make a corresponding flange on the end of the radial
arm, and by means of T headed bolts the radial arm is fastened to the headstock, the
annula groove and T bolts permitting the radial arm to be moved and set to any
angle, according to the shape of metal being cut.
By the employment of an adjustable radial arm, these machines are adapted to do
a class of work which hitherto they could not do, in addition to which, the thrust
upon the cutter spindle will be borne by the radial arm and not by the spindle alone,
as is now the case.
The 20t
A 1000
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements in Milling. Machines for Cutting Metals.
We, GEORGE COLLETT, of the firm of William Heap and Co., of Ashton under
Lyne, Lancashire Engineers Tool Makers, and JAMES HOLLINGWORTH, of the firm
of Hutchinson Hollingworth and Co. Limited, of Dobcross, Yorkshire, Power Loom
Makers, 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
In
Our invention has reference to milling machines employed for cutting metals
this class of machine the cutter spindle is carried at one end by a bracket, and at
the other end by a fixed radial arm cast to the headstock of the machine, but such
fixed radial arm is an impediment when cutting certain forms and shapes of ironwork.
To obviate this, and to make the machine adaptable to act upon different shapes and
sizes of metal, we propose to make the radial arm so that it can revolve or oscillate
in order to alter its position; and to carry out our invention, the radial arm and
headstock are now cast separately, and beld together by bolts. To do this we form a
flange either on the headstock or radial arm, such flange having an annular groove
formed in it. We also make a corresponding flange on the end of the other part and
by means of T headed bolts the radial arm and headstock are fastened together, the
annular groove and T headed bars permitting the radial arm to be moved
and set as if upon a pivot, to any required angle according to the shape of metal
being operated upon.
Such being the nature and object of our invention, we will now make reference to
the accompanying sheet of Drawings illustrative thereof, wherein Fig. 1 is side view

page_text: of such parts of a milling machine as are necessary to shew our invention, and
Fig 219 end view thereof. A represents the headstock of the machine supporting
the cutter spindle B, driven by gear wheel C. The radial arm is shown at D,
having a flange E in which is formed an annular groove F, shewn in dotted lines.
Within the annular groove are the heads of three bolts G which pass through
holes formed in the flange H of the headstock A, the two parts, that is to say, the
headstock and the radial arm, being held together by the bolts G and nuts 1. It will
therefore be understood by those conversant with mechanics that on the bolts G
being slackened, the radial arm D can be twisted or made to oscillate upon its
fulcrum to any angle required to suit the class of work under operation. The
front end of the cutter spindle B is supported in the ordinary manner by the
bracket J. so that when the radial arm is twisted the bracket J is carried with it, as
will be well understood.
By the employment of the adjustable radial arm in milling machines, such
machines can be adapted to do a class of work which hitherto they could not do,
in addition to which, the thrust upon the cutter spindle will be partially borne by
the radial arm and not by the spindle alone, as is now the case.
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 :-
In milling machines for cutting metals, the use of an adjustable radial arm such
as that herein described and shewn and for purposes set forth.
Dated th: 2011 1
TASKER & CROSSLEY,
Huddersfield, Agents.