IMPROVEMENTS IN GRINDERS, AND MACHINERY FOR MOUNTING AND DRIVING THE SAME."
Year: 1881

page_text: LETTERS PATENT to Richard Russell Gubbins, of 17, Park Road, New Cross,
in the County of Kent, Gentleman, for an Invention of "IMPROVEMENTS IN
GRINDERS, AND MACHINERY FOR MOUNTING AND DRIVING THE SAME."
PROVISIONAL SPECIFICATION left by the said Richard Russell Gubbins at
the Office of the Commissioners of Patents on the 9th July 1881.
RICHARD RUSSELL GUBBINS, of 17, Park Road, New Cross, in the County of
Kent, Gentleman. "IMPROVEMENTS IN GRINDERS, AND MACHINERY FOR MOUNTING
AND DRIVING THE SAME.'
"
This Invention relates to certain improvements in grinders, and in machinery for
mounting and driving the same, the object being to provide means for so mounting
and driving annular grinders or rings of any material suitable for use in grinding,
filing, shaping, polishing, or finishing articles of plain or complex contour or outline
of surface, such as, for instance, cocks, taps, valves, horse-shoes, or other articles of
irregular contour, upon or by the inside edge or surface of such rings.
In order to carry out this Invention the grinding or polishing material is made in
the form of a ring of suitable diameter, thickness, and section, contained within a
suitable armature.
In order to impart rotary motion to the said ring, three or more frictional wheels
are arranged around its circumference, and bearing upon or against its periphery,
said frictional wheels being mounted in bearings of the machine. Even surface
speed is imparted to the frictional wheels, and from the transmitted to the
armature or periphery of the annular grinder.
The grinder being thus driven from its circumference, and being annular, presents
by its inner working edge or face facilities for grinding forms of irregular contour
unattainable by the ordinary disc grinder.
Upon the framing in which the ring grinder or polisher is so mounted and runs,
at suitable height, is provided a hand or work rest for facilitating the application of
the work to the ring.
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page_text: The mounting of roller C¹ is in the front of the framing D in bosses at the ends
of D, and the roller_C is mounted upon a movable arm or frame D³ hinged
at D' to the framing D.
The mounting of the rollers C¹, CO2, is shown in detail, Fig. 5, wherein & are the
bosses of the arms D2 or frame D³. e is a tubular lining for said bosses extending
from one to the other, and the pulley itself has a sleeve f keyed in the boring
thereof, which sleeve ƒ runs on the tubular piece or shaft e, and a bolt or spindle g,
with the central part turned down to less diameter than the opening of tube e, is
passed through from end to end. Said tube e has radial holes or borings, and
Jubricant is introduced into tube e between the turned portion of the spindle g and
said tube c. Oil holes are provided, as indicated, through bosses d.
Thus the broad bearing of the sleeve f.of the roller C₁ or C³ upon the lubricating
shaft or tube e will ensure the correct relation between the flanges of rollers C¹, C³,
and the armature A' of the ring grinder or polisher A
The flanges of the rollers C, C1, C2, are ring pieces applied, as indicated, to the
sides of the disc or edge of the roller bodies.
The dotted line h indicates a belt which passes over and imparts equal surface
speed to the three rollers which carry and drive the annular grinder A.
B is the hand or work rest or table mounted upon the framing for holding or
supporting the work being operated upon; although not shown by the Drawings,
the said plate may be mounted so as to be capable of vertical or oblique
adjustment.
The movable arm or frame D³ is hinged at D' to allow the roller C² to adjust
itself under the pressure of the band h to the driving of the annular grinder. It
also provides for the roller C² being swung back clear from the annular grinder A
to provide for the removal or introduction thereof or of an interchangeable ring.
Referring to Fig. 6, the ring is shown mounted and driven from its inside surface,
which is equally applicable for carrying out some kinds of work, and where it is
inconvenient to impart rotary motion to the annular grinder, file, or polisher from
the outside. The letters marking the relative parts shown in Fig. 6 are similar to
those used to indicate the corresponding parts in the other Figures, except that the
swing frame D³ is provided with a counterpoise K, and the band h may be dispensed
with and only one roller be driven, whilst the others will support ring A, or the
band h will be carried over pulleys or prolonged shafts or rollers C, C¹, C².
Having now described the nature and particulars of the said Invention in such
wise that the same may be readily carried into practical effect, I claim,-
First. The annular grinder mounted upon and carried by friction rollers C, C', C³,
constructed and operating as and for the purpose herein set forth and shown by the
respective Figures of the accompanying Drawings.
Secondly. In an annular grinder machine, as set forth, the movable swinging
arm D³ carrying the friction roller C without or with the counterpoise K, as and
for the purpose specified.
In witness whereof, I, the said Richard Russell Gubbins, have hereunto set
my hand and seal, this Sixth day of January, in the year of our Lord One
thousand sight hundred and sights tin
In presence of
WALTER A. BARLOW,
Patent Agent & Engineer,
G, St. Paul's Churchyard,
London, E.C.
R. R. GUBBINS. (L.S.)