Improvements in Polishing Wheels.
Year: 1898

page_text: Date of Application, 15th Dec., 1898
Complete Specification Left, 13th Sept., 1899-Accepted, 14th Oct., 1899
Improvements in Polishing Wheels.
We, JOHN THORNTON and THOMAS RICHARD CANNING, trading as The Revolu-
tion Polishing Wheel Company, of 4, Constitution Hill, Birmingham, in the
County of Warwick, Manufacturers, do hereby declare the nature of this invention
to be as follows:-
Our invention relates to the manufacture of wheels such as are used for polish-
ing electro-plated and other goods and chiefly to that class of such wheels as are
composed of a series of layers of calico or other material.
Hitherto such wheels have usually been composed of a series of discs of calico
stitched together in groups a series of which groups are united at the centre
by being nailed together. This construction, however, is objectionable in that
when the wheel is worn down to say half its diameter it becomes useless and is
discarded. The object of our invention is. to obviate waste as far as possible and
to this end it consists in mounting the calico or other polishing material upon a
centre or boss of wood or other suitable material of such diameter that by the
time that the diameter of the polishing wheel has been reduced so much that it
cannot be further used the calico or other material has been practically worn down
to the said centre. The calico or other material is held upon the centre by
suitable side plates designed to be secured to the centre in such a manner as to
grip the material between them.
Instead of using a series of discs or rings of material placed one upon the other
we sometimes, and especially where felt or other like material is used, take a long
strip of material of the desired width and coil it around the centre so as to form
a series of convolute layers.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London.
Agents for the Applicants.
We, JOHN THORNTON and THOMAS RICHARD CANNING, trading as The Revolu-
tion Polishing Wheel Company, of 4, Constitution Hill, Birmingham, in the
County of Warwick, Manufacturers, 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 relates to the manufacture of wheels such as are used for
polishing and buffing metal goods and chiefly to that class of such wheels as are
composed of a series of layers of calico or other material.

page_text: Hitherto such wheels have usually been composed of a series of discs of felt,
calico or leather stitched together in groups, a series of which groups are united
at the centre by being nailed together. This construction, however, is objection-
able in that when the wheel is worn down to say half its diameter it becomes
useless and is discarded. The object of our invention is to obviate waste as far
as possible and to this end it consists in mounting the calico or other polishing
material upon a centre or boss of wood or other suitable material of such diameter
that by the time that the diameter of the polishing wheel has been reduced so
much that it cannot be further used the calico or other material has been prac-
tically worn down to the said centre. The calico or other material is held upon
the centre by suitable side plates designed to be secured to the centre in such a
manner as to grip the material between them.
Instead of using a series of discs or rings of material placed one upon the other
we sometimes, and especially where felt or other like material is used, take a long
strip of material of the desired width and coil it around the centre so as to form a
series of convolute layers.
In the accompanying drawings,
Figure 1 is a side view of a polishing wheel made according to the invention:
Figure 2 is a section on the line 2-2 Figure 1:
Figure 3 is a view similar to Figure 1 with one of the side plates removed to
show the mode of attachment.
a is the centre or boss which is here represented as made of wood although it
may be of any other suitable material. b is a ring of felt or other suitable
material which is wound upon the centre or boss a. c, c are the side plates which
are provided for securely holding the polishing ring to the centre or boss a. As
shewn in the drawing these side plates c, c are made of metal and are provided
with inturned lips c, e¹ at their peripheries, the said lips c' being adapted, when
the side plates are placed in position, to enter annular grooves 61, 6¹ formed in the
ring of felt or other suitable material b. The side plates care secured to the boss
or centre a by wood screws 2, as shewn in the drawing, or any other suitable
fastening may be employed.
With this arrangement when the polishing layer of felt or other material b
has been worn down to nearly the level of the side plates c, the worn ring b can
be replaced by a fresh one thereby avoiding the waste hitherto caused by discard-
ing the unused central portions when the wheels have been worn down to such
an extent that they cannot be further used for polishing.
The polishing ring can be built up in various ways. In the drawing it is
shewn as made of a strip of felt or other suitable material coiled to form a ring.
We can, however, make the ring of a series of rings of calico or other material
stitched together or of a thin strip of felt or other material wound into a number
of convolute layers forming the ring.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is: -
1. In polishing wheels, the combination of a central boss, and a ring of polishing
material secured to the said boss, substantially as, and for the purpose, herein-
before described.
2. Polishing wheels constructed substantially as hereinbefore described and
illustrated in the accompanying drawings.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London.
Agents for the Applicants.