Improvements in Apparatus for Grinding, Enlarging, and Trueing Round Holes, and for Grinding and Trueing Circular, Straight, and Plane Surfaces.
Year: 1889

page_text: Date of Application, 13th Nov, 1889
Complete Specification Left, 9th Apr., 1890-Accepted. 10th May. 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Grinding, Enlarging, and Trueing
Round Holes, and for Grinding and Trueing Circular, Straight,
and Plane Surfaces.
I RALPH PEACOCK of Gorton Foundry Manchester in the County of Lancaster
Engineer do hereby declare the nature of this Invention to be as follows:-
This Invention relates to improvements in the apparatus for which I obtained
Letters Patent dated 15th January 1887 No. 696 and my present Invention consists
in the application to that machine of a table or tables capable of sliding transversely
or both transversely and longitudinally upon the fixed table of the machine to which
sliding table or tables one end of a radius rod is attached the said radius rod being
variable in length which may be effected by means of a moveable centre on the fixed
table of the machine in which the radius rod slides so that the revolving or grinding
spindle can operate upon surfaces having various radii.
The radius rod can be disconnected from the sliding table or tables when the
grinding spindle is operating upon plane or straight surface or such surfaces as do
not require it.
The slides can be guided in V pieces and be actuated by mechanism derived from
the shaft which drives the revolving or grinding spindle or by hand by means of
suitable screws.
The pieces are removable .from the fixed table when necessary and when
removed the slides can be actuated by mechanism deriving motion from the shaft
which drives the revolving or grinding spindle or by hand by means of suitable
screws.
A sleeve can be used to stiffen the grinding spindle when grinding such kinds of
work as may require it.
Dated him 19th
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Grinding, Enlarging, and Trueing
Round Holes, and for Grinding and Trueing Circular, Straight,
and Plane Surfaces.
I, RALPH PEACOCK of Gorton Foundry Manchester in the County of Lancaster
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 :-
This Invention relates to improvements in the apparatus for which I obtained
Letters Patent dated 15th Januiry 1887 No. 696 and my present Invention consists
in the application to that machine of a table capable of sliding transversely or with
a combined transverse and longitudinal motion (that is in a curved path) upon the
fixed table of the machine to which sliding table one end of a radius rod is attached
the said radius rod being variable in length which may be effected by means of a
moveable centre on the fixed table of the machine in which the radius rod slides so
that the revolving or grinding spindle can operate upon surfaces having various
radii.
The movement of the table can be obtained by mechanism deriving motion from
the shaft which drives the revolving or grinding spindle or by hand by means of
suitable screws.

page_text: The radius rod can be disconnected from the sliding table when the grinding spindle
is to operate upon plane or straight surfaces or such surfaces as do not require the
radius rod in which case the sliding table can be guiled in V pieces corresponding to
the shape of the surfaces which are to be operated upon and be actuated as before
mentioned.
A sleeve can be used to stiffen the grinding spindle when grinding such kinds of
work as may require it. It will of course be understood that if the machine should
have more than one grinding spindle and operating mechanism as represented in the
drawing forming part of the Specification of my before mentioned Patent No. 696 of
1887 there may be a sliding table and adjuncts in corresponding number one for
each spindle.
In order that my Invention may be well understood I will describe with reference
to the accompanying drawings the manner in which the same may be performed.
Figure 1 is a front elevation.' Figure 2 an end elevation and Figure 3 a plan of
a machine provided with an arrangement according to my present Invention.
Figure 4 is a cross section of the sliding table shewing the V-shaped pieces or
guides in position. Figure 5 shews the end of the grinding spindle without the
sleeve.
A is the bed on which slides the headstock J carrying the grinding spindle D or
holder for the operating tool-A³ are the machine standards. B³ is the sliding table
on which the work to be operated on is secured it being carried on the fixed table A³
-B is the radius rod connected at one end to the table B³ and at the other end to the
centre piece B for adjusting the length of the radius rod by moving and fixing the
said centre piece on the table A nearer to or further from the table B-B are
the links and lever and B' the elliptical wheels and disc crank for transmitting
motion from the driving shaft B and the shaft B' and worm and worn wheel shewn
to the sliding table B-C is the screw by which the sliding table B³ can be moved
by hand when the radius rod B' is disconnected. C' shews the work being operated
on by the disc grinder D¹ carried by the spindle D. C³ are the V pieces which may
be either straight or curved but which are not required when the radius rod B is in
use. When these guides are used the sliding table can be operated either by the
screw Cor by the links levers and gear shewn-C is the sleeve for stiffening the
grinding spindle D it being secured thereto by screwing or otherwise.
I bave illustrated a machine with one grinding spindle and operating mechanism
and a sliding table for it but it will be understood that there may be another grinding
spindle and a sliding table in which case the radius rods will be reversed in position
and centred outside the machine and their centre pins may be carried by the
brackets C projecting from the frame of the machine as shewn in Figure 3.
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
claim is :-
First. In combination with machines of the kind referred to a sliding table fo
carrying the work and so guided or controlled that it moves under the operating to
in a path corresponding to the shape of the work operated on substantially as hereir
before described.
Second. In combination with machines of the kind referred to a sliding tab
for carrying the work and guided or controlled by a radius rod substantially as herei
before described.