IMPROVEMENTS IN MOUNTING CONSOLIDATED EMERY AND OTHER GRINDING COMPOUNDS AND MATERIALS IN THE FORM OF WHEELS FOR GRINDING, GLAZING, Buffing, AND THE LIKE"
Year: 1880

page_text: LETTERS PATENT to Robert Luke, of Lime Bank Works, Lime Bank Street,
Ardwick, in the County of Lancaster, for an Invention of "IMPROVEMENTS IN
MOUNTING CONSOLIDATED EMERY AND OTHER GRINDING COMPOUNDS AND
MATERIALS IN THE FORM OF WHEELS FOR GRINDING, GLAZING, Buffing,
AND THE LIKE"
PROVISIONAL SPECIFICATION left by the said Robert Luke at the Office
of the Commissioners of Patents on the 19th October 1880.
ROBERT LUKE, of Lime Bank Works, Lime Bank Street, Ardwick, in the County
of Lancaster. "IMPROVEMENTS IN MOUNTING CONSOLIDATED EMERY AND OTHER
GRINDING COMPOUNDS AND MATERIALS IN THE FORM OF WHEELS FOR GRINDING,
GLAZING, BUFFING, AND THE LIKE."
My improvements in mounting consolidated emery and other grinding compounds
and materials in the form of wheels for grinding, glazing, buffing, and the like are
intended to obviate as far as possible the difficulty which has hitherto been
experienced in securing the grinding compound or material (when used in
wheels operating at the periphery), from bursting and flying off under the action
of the centrifugal force to which they are subjected when the wheels are rotating at
the high speeds commonly used.
To this end I use rings made of any suitable material or materials, and of any
suitable section, in conjunction with grooves in the grinding or other wheels (which
may be either in one annular piece or built up in segments), and in the driving
plates which are commonly employed in mounting the grinding or other wheels.
One arrangement according to my Invention is as follows:-
Rings of circular section and inade of round iron, enveloped in hemp cord
prepared with tar, are secured (concentrically with the axis of the wheel), between
the driving plates and the griuding or other wheel, which are both grooved so as to
allow each ring (of which there may be one or more to one or both driving plates)
to lie partly within its corresponding driving plate and partly within the grinding
or other wheel. By this arrangement a bond or union is obtained, which
communicates great support from the driving plates to the grinding or other wheel
against the action of the centrifugal force to which the grinding or other wheel is
subjected when rotated through the intervention of the driving plates at the high
speeds commonly used.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Luke in the Great Seal Patent Office on the 14th April
1881.
ROBERT LUKE, of Lime Bank Works, Lime Bank Street, Ardwick, in the County
of Lancaster. "IMPROVEMENTS IN MOUNTING CONSOLIDATED EMERY AND OTHER
GRINDING COMPOUNDS AND MATERIALS IN THE FORM OF WHEELS FOR GRINDING,
GLAZING, BUFFING, AND THE LIKE."
My Invention has for its object the improvement of the methods for mounting
emery wheels or discs, with a view to preventing them from bursting under the
action of centrifugal force when revolving rapidly.
For this purpose I use metal rings, which by preference are coated with some
material or materials which will yield slightly under pressare, in conjunction with
grooves in the emery wheels or discs, and in their driving washers or plates. The
emery wheels or discs may either be in one piece or be built up in sections.
The accompanying Drawings serve to illustrate my Invention. Fig. 1 is a side
view partly in section; Fig. 2, a section; and Fig. 3, an enlarged section of the
grooves and rings.
-
A is an emery wheel or disc mounted upon and between two driving washers or
plates B, B, which are secured upon an axle. Two rings of metal C, C¹, of
annular form and circular section, coated with a material which will yield slightly
under pressure, such as hemp cord prepared with tar, are held in corresponding pairs
of grooves formed as shown in the emery wheel or disc, and in the driving washers
or plates upon and between which it is mounted, the object of the coating material
being to allow of a perfect adaptation of the coated rings to the form of the
grooves. The driving washers or plates are forced towards the emery wheel or disc
by bolts, and the rings with their covering are thereby caused to perfectly fill and
be firmly embedded in their corresponding grooves, and to establish a grip between
the emery wheel or disc and the driving washers or plates, which enables the
latter to impart the requisite rotary motion (conveyed to them through the axle)
to the emery wheel or disc while at the same time the rings afford support to the
emery wheel or disc, in resisting the tendency of the centrifugal force to burst it
when revolving rapidly.
Having thus described the nature of my Invention, I wish it to be understood
that I do not limit myself to the form, section, or number of the rings and of their
corresponding grooves as herein described and illustrated, but what I claim as my
Invention is,
-
The use in connection with the mounting of emery wheels or discs of metal
rings held in grooves or recesses formed in the emery wheels or discs, and in the
driving washers or plates on which they are mounted, substantially as described.
In witness whereof, I, the said Robert Luke, have hereunto set my hand
and seal, this Thirteenth day of April, in the year of our Lord One thousand
eight hundred and eighty one.