IMPROVEMENTS IN MACHINERY FOR GRINDING, CUTTING, POLISHING, AND FINISHING SURFACES BY MEANS OF EMERY WHEELS, ROTARY CUTTERS, OR GRINDERS, DOLLIES, OR BUFFS, PARTS WHEREOF ARE SPECIALLY ADAPTED FOR GULLETING SAWS AND SHARPENING TOOLS." PROAL
Year: 1881

page_text: LETTERS PATENT to Francis McDonald Robertson, of Minard, Chichester
Road, Croydon, in the County of Surrey, and Richard Russell Gubbins, of
17, Park Road, New Cross, in the County of Kent, Gentlemen, for an
Invention of "IMPROVEMENTS IN MACHINERY FOR GRINDING, CUTTING,
POLISHING, AND FINISHING SURFACES BY MEANS OF EMERY WHEELS,
ROTARY CUTTERS, OR GRINDERS, DOLLIES, OR BUFFS, PARTS WHEREOF ARE
SPECIALLY ADAPTED FOR GULLETING SAWS AND SHARPENING TOOLS."
PROVISIONAL SPECIFICATION left by the said Francis McDonald
Robertson and Richard Russell Gubbins at the Office of the Commissioners
of Patents on the 31st May 1881.
FRANCIS MCDONALD ROBERTSON, of Minard, Chichester Road, Croydon, in the
County of Surrey, and RICHARD RUSSELL GUBBINS, of 17, Park Road, New
Cross, in the County of Kent, Gentlemen. IMPROVEMENTS IN MACHINERY
FOR GRINDING, CUTTING, POLISHING, AND FINISHING SURFACES BY MEANS OF
EMERY WHEELS, ROTARY CUTTERS, OR GRINDERS, DOLLIES, OR BUFFS, PARTS
WHEREOF ARE SPECIALLY ADAPTED FOR GULLETING SAWS AND SHARPENING
TOOLS."
This Invention relates to certain improvements in machinery or apparatus for
grinding, cutting, polishing, and finishing surfaces by means of emery wheels,
rotary cutters, grinders, dollies, or buffs, parts whereof are specially adapted for
gulleting saws and sharpening tools.
The parts of the apparatus employed in carrying this Invention into practice
are adjustable to different heights and angles of inclination to and of the emery
grinders and the work to be done, so as to bring otherwise inaccessible parts of
the work directly to the grinding surface in due relation the one to the other, and
also to provide facilities for the employment of emery wheels, as bench tools for
cutting, polishing, finishing, and tool sharpening purposes.

page_text: As a bench device there is mounted in suitable bearings a transmission shaft
giving by gearing motion to a shaft, to the end whereof is attached a universal
joint, the opposite side of which joint is attached so as to give motion from the
shaft to a shaft, rod, or spindle carrying the emery wheel for working purposes.
A slide block, which shall be capable of sliding upon the plain surface of a race or
slide-way and the extremity of the shaft carries a handle by which the operator
directs the action of the emery or of a buffing wheel. In connection with the race
or slide is a bench vice for holding the material or article to be placed under the
grinding, finishing, or polishing operation. The race is adjustable in height, and
capable of being fixed at required height in relation to the diameter of the working
wheel for the surface of work to be done. Instead of the universal joint (of
Hooke's form) a swinging overhead arm may depend over the bench, and carry
transmission pulleys from which will be driven the working wheel (emery bufting
or otherwise), and from the axle of said wheel arms carrying small rollers, one of
which rollers will be provided for assisting in guiding and operating the cutting or
surfaceing wheel over work of uneven surface, in addition to the sliding race block.
The vice for holding the work under the wheel will be adjustable in height when
desired instead of the guiding race.
For the saw gulleting and sharpening tool a special vice, consisting of two
hinged wooden faces or janises for holding the saw blade, are carried between sets
of feeding rollers, one of which rollers has holes around same at regular intervals
to take in a stud, whereby the moving forward of the saw under the emery wheel
cutter will be effected regularly at required intervals. The teeth edge of the saw
is to be presented to the emery wheel edge at proper angle thereto for gulleting or
sharpening the saw teeth, so the saw vice or holder and feeder is mounted so as to
swing upon a bracket of a standard, which standard carries a vertically swinging
arm carrying at one end the emery wheel intermediately at the swinging pivot,
the driving pulley, and at the outer end a balance weight.
The drop of the emery wheel end of the swinging arm is regulated by means of
an adjustable stop or guide carried on the bracket of the standard supporting the
aforesaid swinging bracket, so that the depth of cut of the teeth, the requisite
angle of an the space between the teeth are capable of accurate determination,
whether for gulleting or sharpening the saw.
In gulleting or sharpening hand saws a rotary cutter is employed, which works
on the periphery of a revolving drum, from the axis of which it is driven. The
drum is provided with sufficient threads of a screw made to engage with the teeth
of the saws, and agreeing in pitch and section with the cutting edge of the rotating
cutter. In operation the saw is mounted upon two end saws in the usual manner,
and a suitable support is provided, against which the saw bears whilst being cut.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Francis McDonald Robertson and Richard Russell Gubbins in the
Great Seal Patent Office on the 30th November 1881.
FRANCIS MCDONALD ROBERTSON, of Minard, Chichester Road, Croydon, in the
County of Surrey, and RICHARD RUSSELL GUBBINS, of 17, Park Road, New Cross,
in the County of Kent, Gentlemen. "IMPROVEMENTS IN MACHINERY FOR
GRINDING, CUTTING, POLISHING, AND FINISHING SURFACES BY MEANS OF
EMERY WHEELS, ROTARY CUTTERS, OR GRINDERS, DOLLIES, OR BUFFS, PARTS
ARE SPECIALLY ADAPTED FOR GULLETING SAWS AND SHARPENING
WHEREOF
TOOLS."
This Invention relates to certain improvements in machinery or apparatus for
grinding, cutting, polishing, and finishing surfaces by means of emery wheels,
rotary cutters, grinders, dollies, or buffs, parts whereof are specially adapted for
gulleting saws and sharpening tools.
The parts of the apparatus employed in carrying this Invention into practice are
adjustable to different heights and angles of inclination to and of the emery
grinders and the work to be done, so as to bring otherwise inaccessible parts of the
work directly to the grinding surface in due relation the one to the other, and also
to provide facilities for the employinent of emery wheels.as bench tools for cutting,
polishing, finishing, and tool sharpening purposes.
As bench device there is mounted in suitable bearings a balanced countershaft
transmitting motion to a spindle, on which is mounted the grinding wheel cutter
or polishing disc. A slide block or roller, which shall be controlled in its move-
ments by and bear upon the plain surface of a race or slide-way or stop, is mounted
upon a frame carrying the spindle of the emery wheel, and the extremity or
extremities of the frame is or are provided with a handle or handles by which the
operator directs the action of the emery wheel or cutter. In connection with the
race or slide is a bench vice for holding the material or article to be placed under
the grinding, finishing, or polishing operation. The race or races is or are
adjustable in height and capable of being fixed at required height in relation to
the diameter of the grinding or cutting wheel and to the surface of work to be
done.
A swinging overhead arm depends over the bench, and carries transmission
pulleys, from which will be driven the grinding wheel.
For the saw gulleting and sharpening tool a special vice, consisting of two
hinged faces or jaws for holding the saw blade, are carried between sets of feeding
rollers, one of which rollers has holes around same at regular intervals to take in a
spanner or "tommy," whereby the moving forward of the saw under the emery
wheel cutter will be effected regularly at required intervals. The teethed edge of
the saw is to be presented to the emery wheel edge at proper angle thereto for
gulleting or sharpening the saw teeth, so the saw vice or holder and feeder is
mounted so as to swing upon a bracket of a standard. This standard carries a
vertically swinging arm, carrying at one end the emery wheel, intermediately at
the swing pivot, the driving pulley, and at the outer end a balance weight.
The drop of the emery wheel end of the swinging arm is regulated by means of
an adjustable stop or guide carried on the bracket of the standard supporting the
aforesaid swinging bracket, so that the depth of cut of the teeth, the requisite angle
of, and the space between the teeth are capable of accurate determination, whether
for gulleting or sharpening the saw.
In Fig. 1 is represented in perspective view construction of the "saw sharpner"
tool arranged for circular saws. A is the standard supporting in bearings A¹ the
counterbalanced swinging shaft or arm B; C is the emery wheel or cutter mounted

page_text: as shown, and driven by band off pulley E, and E¹ is fast and loose pulley for
transmission; F is a bracket on standard A, which carries the swinging and
adjustable vice or saw-holder G. The slotted arm G¹ of the saw holder carries the
bolt or stud on which the saw to be operated upon is mounted. The saw holder G
has an inner circular portion G2 mounted within the outer band and supporting
piece G, which said inner portion G is adjustable around the circle of the piece G,
according to the sidewise angle of the cut to be given to the saw teeth, and is fixed
at the required angle of the saw in relation to the wheel or cutter by the bolts and
Blots g.
The inner piece G₁ carries upon cords or webs (not shown) stretching
across it the aforesaid slotted arms G¹ of the saw holder, and also carries cheeks, as
of a vice, for holding the saw firmly from undue vibration during working. The
shape of the teeth is given and controlled by means of the swing of the frame G,
and the depth of cut is regulated by the stop H controlling the dip of the counter-
balanced shaft carrying the grinder C; L are handles for the workman to hold
the emery wheel or cutter down to its work.
Fig. 2 represents in like view the said device arranged for band or hand saw,
and in this case the jaws or hinged faces I serve to hold the saw blade, these
jaws I being carried upon the support K, and said support K terminates in the
stock or stud G³, which is capable of being turned in the extremity of the swinging
arm G. The quadrant piece G₁ serves, together with the stock G³, to set by bolt
and nut the edge of the saw to the required angle at which the emery wheel or
cutter is to operate upon the teeth, the rest of the parts corresponded to and
being designated by. like letters as in Fig. 1. The feeding rollers for moving
forward the saw are upon the other side of the jaws I, and not shown.
In Fig. 3 is shown the arrangement of pullies and bands suitable for driving the
bench tool, parts whereof are common to the "saw grinder." B is the counter-
balanced arm; E, the driving pulley, and E2 a driving wheel at the end of the
arm B for receiving the band for driving the emery wheel C and its spindle,
which is mounted in the frame G, G2, which has an inner movable and setting part
(shown clearly in section, Figs. 4 and 7), similar to that of Figs. and 2, and the
handles L are secured to the outer portion G of the frame. The vice M. is of
convenient construction, but has combined therewith the adjustable race or
guides H¹, which at once guides the operation of the grinding wheel or cutter, and
acts as a stop (according to the point at which it may be set), governing the depth
to which the surfacing is to be carried. The end N of the handles may be varied
in form according to requirements, and is removable.
Fig. 4 is a plan view of the emery wheel frame and handles, and by this con-
struction straight surfacing or filing can be effected.
Figs. 5 and 6 represent a race grinder for producing a hollowed surfacing, the
race being designated by the sign H¹, and in this case the one end of the handles
of the emery wheel frame may be secured turnably on a stud or by an universal
joint, and the handle will be used to operate the wheel across the work, which
will be surfaced, according to the configuration of the race upon which the guide
block or roller will travel.
Fig. 7 is detail of the emery wheel frame.
emery
Fig. 8 represents a modification of the race grinder for surfacing the curved
periphery of pullies. The holding device is in this case substantially as the head
of a lathe, upon which the pulley being operated upon is mounted below the
wheel or cutter C. O is a bearing piece bolted on to the lathe end or bed, and
carrying a set screw for raising or lowering the slotted slide piece P. This slot of
slide P receives a stud passing through the extremities of the fork N of the handle
and emery wheel frame. His the race, upon which the guide roller of the handle
bears as it is traversed backward and forward over the periphery of the
pulley.
Fig. 9 is a diagram representing a modification of this last construction, and in
this case the object is to grind the semipherical periphery of a band or cord pulley,
and the periphery of the emery wheel is grooved. The emnery wheel frame G" is

page_text: pivoted at N to the bench, and the race H' is semicircular and bolted down in
position, and is traversed by the guide roller of the handle L. The dotted lines
represent the line of the pulley projected in plan and perspectively in relation to
the emery wheel or cutter.
The race grinder is also by the application of sliding clamps on and between
races adapted for grinding twist drills, the race in all cases governing the cutting,
and being formed accordingly.
The transmission of motion from the balanced counter shaft by elastic bands,
long since used for running light machinery, such as hair dressers' brushes, and so
forth, is not applicable for this Invention, because positive transmission of power
must be employed for the grinding process; furthermore, it is necessary to
absolutely guide or govern the path described by the cutting part of the grinding
wheel or cutter, and this guidance or governance is acquired by the addition of the
suitably formed template or race to the appliance which holds the work which
is being operated upon by the aforesaid grinding wheel or cutter.
**
Having now described the nature and particulars of the said Invention, we
claim,―
[t
"
race or
"
"
"
In a grinding, cutting, or surfacing device, driven off the counter shaft, the
races or stop, in combination with the vice or holder for the work,
said " race or " races
or stop serving as a guide and stop to the free running
emery wheel
or cutter," constructed and operating as and for the purposes herein
set forth and described in reference to and shown by the respective Figures of the
accompanying Sheet of Drawings.
In witness whereof, we, the said Francis McDonald Robertson and Richard
Russell Gubbins, have hereunto set our hands and seals, this Twenty eighth
day of November, in the year of our Lord One thousand eight hundred and
eighty-one
In the presence of
WALTER A. BARLOW,
Patent Agent & Engineer,
6, St. Paul's Churchyard,
London, E.C.
F. M. ROBERTSON. (L.S.)
R. R. GUBBINS. (L.S.)