An Improved Apparatus for Grinding the Centres of Lathes and other Machine Tools or Machines.
Year: 1892

page_text: Date of Application, 20th Oct., 1892
Complete Specification Left, 20th July, 1893-Accepted. 26th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Grinding the Centres of Lathes and
other Machine Tools or Machines.
We, WILLIAM HENRY VAUGHAN and THOMAS FOSTER, both of the Royal
Iron Works, West Gorton, Manchester, in the County of Lancaster, Engineers,
do hereby declare the nature of this invention to be as follows:-
Our invention consists in a convenient arrangement of apparatus for grinding
lathe and similar centres whilst held in the headstock spindle.
The improved apparatus consists of a light frame cast preferably with a square
shank which when in use is clamped in the slide rest; the frame carries on
adjustable centres a small spindle to which is secured an emery wheel, and at the
other end is secured or cast a small pinion, in gear with a spur wheel mounted on
a stud carried by the frame; to the boss of this spur wheel is cast a small bevel
pinion in gear with a bevel wheel which is keyed on a spindle that passes through
the square shank of the frame, and projects beyond it where a handle is fixed.
To grind a lathe centre the shank of the apparatus is clamped in the lathe
rest, the lathe is then set in motion and the rest moved to bring the emery wheel
up to the centre; the handle of the apparatus is then turned by hand and the emery
wheel rotated to grind the centre, the angle of the grinding being controlled by the
adjustment of the slide rest.
We have described a convenient train of gearing for rotating the emery wheel;
but we wish it to be understood that this may be varied or modified" without
departing from the nature of our invention.
Dated this 19th day of October 1892
H. B. BARLOW & GILLETT,
Agents for Applicants.
COMPLETE SPECIFICATION.
An Improved Apparatus for Grinding the Centres of Lathes and
other Machine Tools or Machines.
We, WILLIAM HENRY VAUGHAN, and THOMAS FOSTER, both of the Royal
Iron Works, West Gorton, Manchester, in the County of Lancaster, Engineers, 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:-
Our invention consists in a convenient arrangement of apparatus for grinding
lathe and similar centres whilst held in the headstock spindle.
The improved apparatus consists of a light frame cast preferably with a square
shank which when in use is clamped in the slide rest; the frame carries on
adjustable centres, a spindle to which is secured an emery wheel, and at the other
end is secured or cast a small pinion, in gear with a spur wheel mounted on a stud
carried by the frame; to the boss of this wheel is cast a small bevel pinion, in gear
with a bevel wheel which is keyed on a spindle that passes through the square
shank of the frame, and projects beyond it where a handle is fixed.
And in order that our invention may be fully understood and readily carried into
effect we will describe the same with reference to the accompanying drawing which
is a front elevation of our improved apparatus for grinding lathe centres and other
articles.

page_text: In this view a designates a frame or bracket with a square shank a¹; b is a
spindle supported on adjusting screws c or other suitable bearings which screws
pass through the arms of the frame or bracket a and are secured by lock nuts d;
on the spindle is fixed an emery wheel e and a pinion the latter gearing into a
spur wheel g
fixed on a stud supported by the frame a, and cast with or fixed to
the wheel ? is a bevel pinion i which gears into a bevel wheel j fixed on a spindle k
which passes through a hole bored in the square shank a'; on the lower end of the
spindle which projects below the square shank a' is fixed a handle 1.
To grind a lathe centre or other article the shank al of the apparatus is clamped
in the lathe rest, not shown, the lathe is set in motion, and the rest is then moved
to bring the emery wheel e up to the centre; the handle is then turned by hand
and the emery wheel e rotated by the train of gears shown and described to grind
the centre or other article, the angle of the grinding being controlled by the
adjustment of the slide rest.
We have described a convenient train of gearing for rotating the emery wheel e;
but we wish it to be understood that this may be varied or modified without
departing from the nature of our invention.
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
The general combination and arrangement of parts constituting our improved
apparatus for grinding the centres of lathes and other machine tools or machines
substantially as herein described and as illustrated by the accompanying drawing.
Dated this 19th day of July 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicants.