Improvements in Polishing Wheels.
Year: 1891

page_text: Date of Application, 10th Nov., 1891-Accepted, 12th Dec., 1891
COMPLETE SPECIFICATION.
[Communicated from abroad by GEORGE ARROWSMITH DRYSDALE, of
No. 9, Hancock Street, Everett, Massachusetts, United States of America,
Merchant.]
Improvements in Polishing Wheels.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 invention relates more particularly to polishing wheels of that type in which
the periphery of the wheel is composed of a series of pieces of leather set radially
and secured in place by means of a metallic ring or band which passes through
each piece. Wheels of this description which have been previously made, so far as
known to me, have been constructed with a continuous metallic ring or band, in
which case the pieces of leather require to be slit to permit of their being placed
upon the ring or band, or the ring or band has been soldered after the pieces of
leather were placed upon it, which rendered it difficult or impossible to open or
sever the ring and again unite it when it became necessary to replace any portion
of the leather. As the leather pieces require to compactly fill the entire ring, it is
necessary if the ring be soldered, to slit one or more pieces of the leather and
place them on the ring after it is soldered at the point where the solder is applied
and these pieces thus placed on the ring are when the wheel is run at a high rate
of speed, liable to be displaced and the wheel rendered valueless. To avoid these
objections is the object of my present invention, which consists in a polishing
wheel, the periphery of which is composed of pieces of leather set radially and
secured by a ring passing through each piece, the ends of the pieces of metal
forming the ring being joined by means of a connection in such manner that the
ring may be closed or opened as desired; all as more particularly set forth and
as is pointed out in the claims which are appended hereto and made a part hereof.
I have shown my invention in the accompanying drawings to which reference is
made in the following description and in which
Figure 1 is a side view of a polishing wheel embodying my invention.
Fig. 2 is a section on line 2-2 Fig. 1.
Fig. 3 is a section of a portion of the periphery of the wheel showing the pieces
of leather which form the periphery, as also the retaining ring and the device for
closing the same.
Fig. 4 is a detail showing the central portion of the connection which closes the
ring as square to receive a piece of leather with a square hole therein.
Fig. 5 is a detail view of the connection for the open ring.
Fig. 6 is a sectional detail view to be referred to.
The hub of the wheel is shown at a and is of metal or other suitable material.
It is provided at one end with a flange and at the other with a washer or ring b
and a nut c, the latter being screwed on to the hub as shown Fig. 2 and serving to
clamp the central portions d, f, of the wheel firmly together. The inner edge of
the central portions d, f, is cut bevelling as shown at y so that when these portions
are together a V-shaped groove is formed in their peripheries, as shown Fig. 2 for
the reception of the correspondingly-shaped inner ends of the pieces of leather h,
which are set radially thereon. To further strengthen the wheel and to secure the
pieces d,f together, bolts k, are inserted through the pieces d, f, the bolts being
preferably provided at one end with nuts so that they may be taken out and the

page_text: wheel taken to pieces to remove the leather periphery, when that is desired for the
purpose of renewing or repairing it. The pieces of leather are skived slightly at
their inner edges toward the hub of the wheel in order that they may be set
radially, the inner edges requiring to be slightly thinner as they are on a shorter
circle than the outer edges. A hole is punched in each piece of leather of a size
sufficient to permit the insertion therein of a retaining ring or band m which is
preferably of metal, and a sufficient number of pieces of leather are strung on the
ring m to fill the ring when it is open. The ends of the open ring arc each
provided with a threaded socket j to receive a right and left-hand screw con-
nection p which operates when inserted to complete the ring and draw the ends
together. This permits of the adjustment of the ring to increase or diminish its
size slightly and thus crowd the pieces of leather closely together when the ring
is closed. The connection p is preferably made square in cross section as shown
atr Fig. 4, and a piece or pieces of hard leather of a size sufficient to fill the con-
nection P. that is of a thickness equal to the length of the squared portion of the
connection, are placed thereon and when the ring is closed this piece of leather may
be used as a wrench to turn the connection and close the ring. In this way, when
the ring is completed it is covered completely with the pieces of leather which are
compactly placed thereon and a periphery for the wheel is produced having a
continuous surface of leather and in which none of the pieces of leather are
slitted so that their liability to fly off or become displaced as the roll is
speeded is reduced to a minimum. It will be obvious that instead of squaring
the, connection p and placing thereon a piece of leather having a square hole
which may be used as a wrench with which to turn the connection p, the con-
nection may be turned with an ordinary wrench or other suitable instrument
and the piece or pieces of leather necessary to cover it slitted and placed on
the connection. In this way, some of the advantages of my invention may be
obtained. I prefer, however, the method first described in which the connection p
is squared and the piece or pieces of leather placed thereon are used to turn the
connection and close the ring.
In cases where wheels are to be driven at a very high rate of speed it may
be desirable to connect the ring m at two or more points by means of spokes or
connections with the hub. This may be done in any suitable manner as by
forming lugs on the hub and providing spokes q extending from said lugs to the
ring m each of said spokes having at its outer end an eye 7 encircling said ring.
In such case the pieces of leather as also the central portions d, f, of the wheel
which adjoin the spokes require to be slightly cut away to accommodate the spokes
or connections q as will be obvious. The central portions d, f, of the wheel are
preferably made of indurated fibre, that is wood fibre or paper pulp moulded to
shape and indurated. They may however, be made of wood or other suitable
material.
I have spoken of the connection p as being squared, that is, the central portion
thereof which receives the piece or pieces of leather being square in cross section,
but it will be obvious that the central portion of the connection may be of any
shape in cross section which will permit of the piece or pieces of leather being
used to turn the connection, that is the central portion of the connection may be
of any shape in cross section other than circular. The wheel may be built up by
placing the part on the hub then placing the leather periphery which has been
previously formed in position against the bevelled edge of the part then placing
the part d on the hub and securing the whole together by the nut and washer on
the hub and the screw bolts k.
While I prefer to use pieces of leather for the periphery of my wheel which are
only perforated and not slitted, yet I do not desire to limit my invention to the use
of pieces of leather which are not slitted as my retaining ring may be used advan-
tageously especially for wheels which are not to be run at high speed, when the
leather pieces are slitted from the perforation to the edge. Neither do I desire

page_text: to limit myself to the use of leather only; any polishing material as, for example,
felt, may obviously be employed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. A polishing wheel, the periphery of which is composed of a number of pieces
of leather set radially thereon and perforated and a ring passing through said
perforations and closed by means of a screw connection, substantially as and for
the purposes described.
2. A polishing wheel having its periphery composed of pieces of leather set
radially thereon and a ring passing through said pieces and closed by means of a
screw connection, the central portion of the connection being squared and provided
with a piece or pieces of leather having a square hole therein, substantially as and
for the purposes set forth.
Len wear SLO
1031.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.