Improvements in Face Grinding Wheels and Face Polishing Wheels.
Year: 1897

page_text: Date of Application, 9th Dec., 1897
Complete Socifnation Left 9th Sent 1898 Accented 8th Oct.
1898
Date of Application, 9th Dec., 1897
Complete Socifnation Left 9th Sept 1898-Accepted 8th Oct.
1898
PROVISIONAL SPECIFICATION.
Improvements in Face Grinding Wheels and Face Polishing Wheels.
We, BARTHOLOMEW RICHMOND ROWLAND and ROBERT LUKE, of the Firm of
Luke and Spencer, Limited, of Broadheath, near Manchester, in the County of
Chester, Engineers, do hereby declare the nature of this invention to be as
follows:
This invention consists in improvements in face grinding wheels and face
polishing wheels and has for its principal objects to render face grinding wheels
and face polishing wheels of emery or other grinding or polishing materials more
efficient in operation and more economical, more convenient and safer in use
than they have hitherto been.
According to this invention instead of forming face grinding or face polishing
wheels of emery or other grinding or polishing materials moulded along with
suitable cementing or binding materials into annular bodies capable of being
secured upon spindles by means of which they may be made to revolve we form
grinding or polishing wheels of emery or other suitable grinding or polishing
material moulded along with any suitable binding or cementing material or
otherwise formed into prisms or rods which may conveniently be made of shapes
approximately those of the segments of rings or may be of square or rectangular
or other shapes which may be considered suitable and secure in constructing
each grinding wheel or polishing wheel a suitable number of such prisms or rods
in cavities or notches formed in or around a disc or holder which is capable
of being mounted upon or is provided with a spindle or shaft. The prisms or
rods employed in a face grinding wheel or face polishing wheel constructed
according to this invention are made capable of being adjusted in position
longitudinally in the cavities or notches of the disc or holder employed in con-
junction with them, and are thus made capable of being moved to project from
such disc or holder in the manner requisite from time to time as they becom
worn until almost entirely worn away.
In one mode of securing rods or prisms of grinding material or polishing
material in a grinding wheel or polishing wheel according to this invention we
surround the rods or prisms and dise or holder with a flange or ring formed with
slits or otherwise made sufficiently elastic or flexible in part and provided with
screw-threads and made slightly taper on its exterior and provide a nut or collar
which may be screwed upon it so as to cause it to hold the said rods or prisms in
position.
In another mode of securing rods or prisms of grinding material or polishing
material in a grinding wheel or polishing wheel according to this invention we
provide within the ring or group of rods or prisms formed by the rods or prisms
applied to a disc or holder, a flange or ring formed with slits or otherwise made
sufficiently elastic or flexible in parts and made with a slightly taper opening
and provided with screw-threads in its interior and provide in conjunction
therewith a plug or collar which may be screwed into the suid flange or ring
and cause the rods or prisms to be secured in position.

page_text: In any cases in which it may be desirable to do so we employ bolts or set-screws
or other suitable means to hold the prisms or rods of grinding material or polish-
ing material in position in holders or discs according to this invention.
Dated this Eighth day of December 1897.
HOWARD
CHEETHAM,
Manchester, Agent to the Applicants.
Improvements in Face-grinding Wheels and Face-polishing Wheels.
We, BARTHOLOMEW RICHMOND ROWLAND and ROBERT LUKE, of the Firm of
Luke and Spencer, Limited, of Broadheath, neur Manchester, in the County of
Chester, Engineers, do hereby declare the nature of this invention and in what
runner the same is to be performed, to be particularly described and ascertained
in and by the following statement:—
This invention consists in improvements in face-grinding wheels and face-
polishing wheels and has for its principal objects to render face-grinding wheels
and face-polishing wheels of emery or other grinding or polishing materials more
efficient in operation and more economical, more convenient and safer in use
than they have hitherto been.
or
According to this invention instead of forming face-grinding wheels or face-
polishing wheels of emery or other grinding or polishing materials moulded with
suitable cementing or binding materials into annular bodies capable of being
secured upon spindles by means of which they may be made to revolve, we form
grinding or polishing wheels of emery or other suitable grinding or polishing
material moulded with any suitable binding or cementing material
otherwise formed into prisms or rods which may conveniently be made of shapes
approximately those of the segments of rings or may be of square or rectangular
or other shapes which may be considered suitable, and secure in constructing
ench grinding wheel or polishing wheel, a suitable number of auch prisms or rode
in cavities or notches formed in or around a metal disc or holder which is capable
of being mounted upon or is provided with a spindle or shaft. The prismis or
roda employed in a fuce-grinding wheel or face-polishing wheel constructed
according to this invention are made capable of being adjusted in position
longitudinally in the cavities or notches of the disc or holder employed in con-
junction with them, and are thus made capable of being moved to project from
such disc or holder in the manner requisite from time to time as they become
worn, until almost entirely worn away.
In one mode of securing rods or prisms of grinding material or polishing
material in a grinding wheel or polishing wheel according to this invention we
surround the rods or prisms and dise or holder with a flange or ring formed with
plits so as to be sufficiently elastic or flexible in part and provided with screw-
threads and made slightly taper on its exterior and provide a nut or collar which
may be screwed upon
it so as to cause it to hold the said rods or prisms in position.
In another mode of securing rods or prisms of grinding material or polishing
material in a grinding wheel or polishing wheel according to this invention wo
provide within the ring or group of rods or prisms formed by the rods or prismis
applied to a disc or holder, a flange or ring formed with slits so as to be made
sufficiently elastic or flexible in parts and made with a slightly taper opening
and provided with screw-threads in its interior and provide in conjunction
therewith a plug or collar which may be screwed into the said flange or ring
and cause the rods or prisms to be secured in position.

page_text: A grinding wheel or polishing wheel constructed according to one form of
this invention is illustrated in the accompanying drawings in all the figures of
which the same letters of reference are employed to indicate corresponding parts.
Fig. 1 is a side elevation of the said grinding wheel or polishing wheel, and Fig. 2
is a view illustrating the grinding or polishing face of such grinding wheel or
polishing wheel and Fig. 3 is a section through such grinding wheel or polishing
wheel taken upon the plane indicated by the line (A. A) of Fig. 2.
In the grinding wheel or polishing wheel illustrated in the accompanying
drawings (a) (a) are the rods or prisms of emery and any suitable binding or
comenting material moulded into form or otherwise formed, (b) is the disc or
holder in which such rods or prisms are secured, (c) is a flange or ring provided
upon the disc or holder (b) and arranged to surround the rods or prisms (a) and
disc or holder (b) and formed with slits (c) and provided with screw-threads and
made slightly taper on its exterior and () is a nut or collar which is screwed
upon the flange or ring (c) so as to cause it to hold the said rods or prisms (a)
in position. The prisms or rods (a) illustrated in the accompanying drawings
are made approximately of the shape of segments of rings and the cavities or
notches formed in the disc or holder (b) to receive such prisms or rods (a) are
made of corresponding form and as is clearly indicated in Fig. 2 the said
cavities or notches and prisms or rods are made of such relative sizes that each
prism or rod shall bear against the two opposite sides of the cavity or notch in
which it is placed while there is some little space between such prism or rod and
the third side of the said cavity or notch and part of the prism or rod shall pro-
ject from the open side of the cavity or notch, so that the flange or ring (c) may
be made to bear upon it and causing it to bear against the said two sides of the
cavity or notch in which it is placed cause it to be held firmly in position. The
flange or ring (c) is preferably formed of brass but may be formed of any other
material which is sufficiently elastic or flexible and is secured to the dise or
holder (b) by means of screws () and is formed with slits (r') so that the parts
between the slits may yield to the pressure exerted upon the flange or ring (c)
when the nut or collar (d) is screwed upon the screw-thread formed upon such
Hange or ring (e) and again expand when pressure is removed therefrom. On
the exterior of the disc or holder (b) a projecting collar (b) is formed so that
there is some space between the elastic or flexible parts of the ring or collar (c)
and the edges of the projecting ribs which separate the cavities or notches of the
disc or holder (b). At the parts at which the screws (e) are inserted into it, the
disc or holder (b) is provided with ribs (2) somewhat thicker than the other
ribs (6) formed upon such disc or holder (b). The uut or collar (d) is provided
with holes () in any of which a key may be inserted when it may be requisite
to turn the nut or collar (d) upon the flange or ring (c). The disc or holder (b)
is provided with a boss (b) to receive the mandrel or spindle of the machine in
which the grinding wheel or polishing wheel is to be mounted for use. In
Figs. 1, 2 and 3 the boss (3) is, as we prefer formed in the interior of the disc
or holder (b) but it is obvious that it may be formed upon the exterior of such disc
or holder (b). The prisms or rods (a) may be made of any length which may be
considered desirable or convenient.
In the method of carrying this invention into effect in which there is placed
within the ring or group of rods or prisms formed by the rods or prisms applied
to a disc or holder a flange or ring formed with slits so as to be sufficiently flexible
in parts and made with a slightly taper opening and provided with screw-threads
in its interior and a plug or collar is made capable of being screwed into the said
flange or ring and so causing the rods or prisms to be secured in position, the
notches or recesses in which the rods or prisms are placed are directed towards
the axis or centre-line of the disc or holder in which they are formed but except
in so far as has been herein before mentioned and in so far as it is necessary to
form holes through the disc or holder if it be desired to allow the rods or prisms
of grinding or polishing material when new to project at both ends from the

page_text: grinding or polishing wheel in which they are to be employed, the construction
of grinding or polishing wheels according to this form of this invention can
obviously be easily accomplished without further illustration than is furnished
in Figs. 1, 2, and 3 of the accompanying drawings.
In comparison with the face-grinding wheels and face-polishing wheels con-
structed of annular blocks of grinding material in the manner hitherto usual,
face-grinding and face-polishing wheels constructed according to this invention
are capable of operating more rapidly upon articles or objects and with less heat-
ing of such articles or objects because the spaces between the prisms or rods
employed in grinding wheels and polishing wheels made according to this inven-
tion enable the particles removed from the articles operated upon and from the
grinding and polishing wheels to readily escape: more economical because the
prisms or rods of grinding material or polishing material being capable of adjust-
ment in position need not when first mounted in the discs or holders in which
they are to be used be made to project so far at the ends which are to be made
to operate upon articles, as to be liable to breakage and because there is in the
prisms or rods little grinding or polishing material which serving only as means
of holding other parts of the grinding material can not be used for grinding or
polishing more convenient in use for the reasons aforesaid; and safer because
it is practically impossible for any large pieces to break and be thrown off while
the grinding wheels or polishing wheels are in use.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
In a face-grinding wheel or face-polishing wheel the combination of a suitable
number of prisms or rods formed of emery or other suitable grinding or polishing
material moulded with any suitable binding or cementing material or otherwise
formed into prisms or rods, a disc or holder formed with cavities or notches to
receive the said rods or prisms of emery or other suitable grinding or polishing
material and means by which the said rods or prisms of emery or other suitable
grinding or polishing material may be secured in position and released and again
secured in position in the said disc or holder, all constructed arranged and
employed for the purposes and substantially in the manner herein before described
nnd illustrated in the accompanying drawings.
Dated this Eighth day of September 1898.
HOWARD
CHEETHAM,
Manchester, Agent to the Applicants.