Dressing the Teeth of Wheels, and the like.
Year: 1888

page_text: Date of Application, 11th Feb., 1888
Complete Specification Left, 10th Nov., 1888
Complete Specification Accepted, 22nd Jan.,
1889
Dressing the Teeth of Wheels, and the like.
JOSEPH HILL Engineer, George Street Engineering Works, Derby, in the County
of Derbyshire, & ISAAC HILL Engineer, George Street Engineering Works, Derby,
in the County of Derbyshire, do hereby declare the nature of this invention to be as
follows:-
The object of our present invention is to produce a new, simple, and effective self
acting, or Automatic Saw sharpening apparatus, or machine, suitable for Sharpening,
and Setting circular or other kind of Saws, used for Sawing metals, wood, or any
other substance.
The machine consists of a standard, or pillar, upon which is attached all the various
brackets, and parts of the machine; down one side of this Standard, or pillar, is
formed a tee slot recess, in which are fitted bolts & nuts, or we may use the ordinary
bevilled slides, we also form a bracket, or carriage, having a large washered spindle
fitted in it, which is intended to receive the saw; the saw being placed between the
washers; at the other end of the said spindle, we fix a worm wheel, which is revolved
by a worm on a spindle, carried in bearings on the said bracket; on this worm
spindle, we attach, and secure, a proper pitched ratchet wheel, and close to which, is a
lever and catches, to operate the ratchet wheel, when the machine is set in motion.
This bracket is also provided with a rack, and pinion, for raising, and lowering
purposes, as occasion requires.
Upon this bracket is formed a projection, which fits in the Tee slots in the Standard,
or pillar, and secured to the Standard, or pillar, by the before mentioned bolts & nuts;
above this said bracket, which carries the saw spindle, we place a U shaped bracket,
bolted to the top of the standard, or pillar, and in either side of the bosses on the
U shaped bracket, we fit two centre pointed pins, and between these pointed pins
we place a Tee shaped lever, or carriage, which oscillates between the two pointed
pins. To one side of this said carriage, is fitted a spindle, upon which are fitted two
washers, between which is placed an Emery, or cutter wheel, or milling tool, of any
desired shape and at the other end of the spindle is fitted a pulley.

page_text: This Emery, or cutter wheel, or milling tool, when fixed is at right angles to the
Saw to be sharpened, or parallel to the spindle, which carries the Saw; at the contrary
end of the Tee shaped carriage, is attached a volute spring, with a joint affixed thereto,
and in this joint is fitted a connecting rod, or lever. The motions are obtained by
using a pinion, driving a wheel of suitable size; in this wheel is fixed a stud, at any
suitable distance from the centre, to give the desired amount of movement ; upon this
stud is fixed the connecting rod or lever before mentioned.
We also make a lever with a slot at one end, of the proper size, length, inclination,
& angle, as required to enable a certain movement to be made, at a given time, and
at the other end is formed a straight slot, having a movable stud fitted in it; this
movable stud, is moved by a screw, so as to give an accurate adjustment, and
movement when required; between these two slots is formed a boss, with a hole
bored in the centre; this said slotted lever is fixed on a stud in a suitable bracket, on
the side of the standard, or pillar, in its proper position.
The inclined slot in lover is fixed, or placed, so that the stud, fitted in the wheel
will move to & fro in the slot, which gives an upward and downward motion, to the
other end of this slotted lever. The driving pinion is fitted on a counter shaft,
supported by two brackets bolted on to the standard, or pillar, and on this shaft is
fitted the driving pulley, for driving the Emery, or cutter wheel, or milling cutter,
which is driven by belt; and there are also fitted fast, & loose pulleys, for driving the
machine, from any main shaft. About midway down one of these brackets, which
carries the counter shaft, is a stud, fitted, which carries the wheel from which the
principal notions are obtained. For obtaining the motions we may use an excentric,
and a slotted disc, running concentric with the centre, and so fixed in a proper
position to give, at a given and proper time, the motions required to raise or lower
the Emery wheel, or cutter wheel, or milling cutter, on to the saw being sharpened,
and also to move the saw round which is fixed on the worm wheel spindle.
As each revolution of the driving wheel is made, the Emery, or cutter wheel, or
Milling Cutter, is caused to move down into a tooth of the Saw, which is fixed on the
machine, and immediately, at the proper moment, when the Emery, or cutter wheel,
or milling cutter, is raised out of the tooth of the saw, by the driving wheel revolving,
then the slotted lever is operated upon by the stud in the driving wheel, and so
causes the catches on the ratchet wheel to be moved, which also revolves the worm,
and therefore the worm wheel upon the saw carrying spindle, the saw being attached
to this said spindle is thereby caused to revolve one or more teeth, as may be desired;
the amount of cut required is regulated by an arrangement of adjusting screws.
The pressure of the Emery, or cutter wheel, or Milling Cutter, is maintained,
and regulated, by the before mentioned volute spring, and adjusting screws. The
advantages are, saving of time, greater durability of the saw owing to more accuracy
in sharpening; a Saw may be put on the machine, and sharpened with only the
occasional attention of an attendant, without the slightest danger of injury resulting
to the saw; the Saw is sharpened truer, better, and superior, to any other method of
sharpening saws, and more especially, the temper of the saw is not varied.
The machine is also applicable for sharpening other cutters, or milling tools, and
dressing teeth of wheels etc.
Dated this Touth d..
L
1000

page_text: An Automatic Machine for Sharpening Saws, Milling Outters,
Dressing the Teeth of Wheels, and the like.
JOSEPH HILL, George Street Engineering Works, Derby, in the County of Derby
Engineer, ISAAC HILL, George Street Engineering Works, Derby, in the county of
Derby, Engineer, 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 :-
The object of our present invention is to produce a new, simple, and effective
selfacting or Automatic Saw sharpening apparatus, or machine, suitable for sharpening,
and setting circular or other kind of saws, used for sawing Hot, or Cold Iron or
Steel, Metal, Wood, or any other substance.
The machine consists of a standard or pillar (D) sheets 1. 2 & 3. upon which is
attached all the various brackets, and parts of the machine.
Down one side of this standard or pillar is formed a V slot recess (d), sheets 1 & 3
in which we place a corresponding V strip, secured by bolts and nuts to bracket (E)
sheets 1 & 3. We also form a bracket (E¹) or carriage cast in part with bracket E
sheet 1 having a large washered spindle fitted in it, which is intended to receive the
the saw being placed between the washers.
saw,
At the other end of the said spindle we fix a worm wheel (F), sheets 1. 2 & 3.
which is revolved by a worm on spindle carried in bearings on the said bracket. On
this worm spindle we attach and secure a proper pitched ratchet wheel (G),
sheets 12 & 3 and close to which is a lever (S), sheets 1. 2 & 3 and catch (Si)
sheets 1. 2 & 3 to operate the ratchet wheel (G), sheet 12 & 3 when the machine is
set in motion; this bracket (E) sheet 1. & 3 is also provided with a rack and pinion
for raising purposes as occasion requires. Above this said bracket E' sheet 1.2
which carries the saw spindle, we place a horse shoe shaped bracket or frame (H),
sheet 1 & 2 with projecting pieces on the upper part (H), sheet 1. 2. & 3 arranged
to receive adjusting screws (✗ and X'); sheet 1'2. & 3 this bracket is bolted to the
top of the standard or pillar (D) sheet 1. 2. 3. In either side of the bosses on the
horse shoe shaped bracket or frame (H), sheets 1 & 2 we fit two centre pointed pins,
and between these pointed pins we place a tee (T) shaped lever, or carriage (I), sheets 12
& 3 which rocks or oscilates between the 2 pointed pins. Passing thro' the contre of
the head of this said tee (T) shaped carriage (1), sheets 1. 2. & 3, is fitted a spindle
upon which is placed two washers (J & J¹), sheets 1. 2 & 3 between which is placed
an Emery or cutter wheel, and at the other end of the spindle is a small ordinary
flanged pulley. This Emery or cutter wheel when fixed is exactly transversed to the
At the contrary
saw to be sharpened, or parallel to the spindle which carries the saw.
or shank end of the tee (T) shaped carriage (I) sheets 1. 2. 3 is attached a straight
tensional spring (K) sheets 1. 2 & 3, with joint affixed thereto, and in this joint
is fixed a connecting rod or lever (L) sheets 1. 2. & 3. The motions are obtained by
using a pinion (Y) sheets 1. 2. & 3 driving a wheel (Y¹) sheets 12 & 8 of suitable
size; in this wheel (Y¹) sheet 1. 2. 3 is fixed a stud (Z), sheets 12 & 3 at any
suitable distance to give the desired amount, or degree of movement; upon this stud
is fixed the connecting rod (L), beforementioned. We also make a lever (M)
sheet 1. 2. 3 with a slot (M³) sheet 1 & 2 at one end, of the proper size, length,
inclination, and angle as required to enable a certain movement to be made at a given
time; at the other end is formed a straight slot (M') sheet 1 & 3, having a moveable
stud (M) sheets 1. 2 & 3 fitted in it; this stud is moved by a screw (if necessary),
so as to give an accurate adjustment and movement when required.

page_text: Between these 2 slots (M & M³) sheets 1 & 3 is formed a boss with a hole bored
in centre. This said slotted lever (M) sheets 1 2. 3 is fixed on a stud (N),
sheets 1. 2 & 3 in a suitable bracket on side of standard or pillar (D), sheets 1. 2. 3
and in its proper position. The inclined slot (M²) sheets 1 & 3 in lever M is fixed or
placed, so that, the stud (Z) sheets 1 2. 3 fitted in the wheel Y¹ sheets 1. 2. & 3 will
move to & fro in the slot, which gives an upward and downward motion to the
other end of this slotted lever (M) sheets 1. 2. 3. The driving pinion is fitted on a
counter shaft supported by two brackets (0 and O¹) sheets 1 2. 3. bolted on to
the Standard or pillar (D), sheets 1. 2. & 3 and on this shaft is the driving pulley (P)
sheets 1. 2 for driving the Emery or cutter wheel, which is driven by belt. There
are also fitted fast and loose pulleys (Q) sheet 1. 2 & 3 for driving the machine,
off any main shaft. About midway down one of these brackets (01) sheet 1. 2. 3
which carries the counter shaft, is fitted a stud, which carries the wheel Y, sheets 1. 2. 3
from which the principal motions are obtained. (For obtaining these motions we could
use an ordinary eccentric or cam, and a slotted disc running concentric with the
centre, and so fixed in a proper position as to create, at a proper time the motions
required to raise or lower the Emery or cutter wheel from or on to the saw being
sharpened and also to move round in consonance therewith the saw which is fixed
onto the worm wheel spindle.)
As each revolution of the driving wheel (Y') sheets 1. 2. 3 is made, the Emery or
cutter wheel is caused to move down into a tooth of the saw, which is fixed on to the
machine, and immediately at the proper moment, when the emery or cutter wheel is
raised out of the tooth of the saw, then the slotted lever (M) sheets 12.8 is
operated upon by the stud (Z) sheets 1. 2 & 3 in the driving wheel (Y') sheets 1 2. 3,
at a given and regular period, and so causes the catch (S¹) sheets 1. 2. 3 on the
ratchet wheel (G) sheets 123 to be moved, which motion also revolves the worm and
therefore the worm wheel (F) sheets 1. 2. 3, upon the saw carrying spindle; the saw
being attached to this said spindle, is therefore caused to revolve intermittently one
or more teeth as may be desired; the amount of cut required being regulated by an
arrangement of adjusting screws (X & X'), sheets 1. 2. 3 which are fitted in the top
part of the frame (H'), sheets 1. 2. 3 which is horse shoe shaped as before referred to.
The pressure of the emery or cutter wheel upon the tooth of the saw is maintained,
and regulated by the before mentioned straight tensional spring (K) sheet 12. 3,
and adjusting screws (✗ and ✗¹) sheet 1 2. 3.
Any vibration or side strain caused to the saw is obviated by an adjusting
bracket (R) sheet I, in which is accommodated an india rubber cushion inserted next
to the face of the saw.
The worm, and worm wheel (W) elevation (B) sheet I is used for the purpose of
raising or lowering the saw spindle, and accompanying parts to the height required to
take any diameter of saw, the machine may be adapted for.
For sharpening saws & cutters where they require to be sharpened on a bevil, or
at any angle, such as circular wood saws, as will be seen in the accompanying sheet
of drawings, (Front View Fig. 1), and (Side View Fig. 2), sheet 3. We use several
modifications without departing from the principles of the invention, deviations being
made in a few parts as hereafter described, reference being made by numerals, and
letters in the aforesaid mentioned sheet of drawings.
Instead of using the horse shoe shaped bracket (H), sheet 1. 2 we use two circular
plates (a and b), sheet 3 with a hole cast in the centre of each. On either side of the
plate (6), sheet 3 we form two bosses, and fit 2 centre pointed pins, between which
we place the tee (T) shaped lever or carriage (I), sheet 1. 2. 3.
The plate (a) sheet 3 is provided with slots, whilst the plate (6) sheet 3 is provided
with bolts & nuts; this is so that it may be revolved or placed at any required angle,
and afterwards secured and tightened by the bolts & nuts. This arrangement gives
and afford adjustment of any inclination to the Emery wheel (e), sheet 3.
The driving of the Emery wheel spindle is by a grooved pulley (C) sheet 3 from
a corresponding groove pulley (C), sheet 3 but of larger diameter, using an ordinary
rubber belt or band for driving.

page_text: In connection with bracket (E) sheet 3. we form at its lowered to this slide
sheet 3 and fit into it a corresponding V slide (f) sheet 3; attached to this slide
is a pioce (9), which is so arranged, and provided to carry a hollow stud or pivot;
through this hollow stud or pivot passes a spindle, which is fitted at either end with
a bevil wheel (1 & 2) sheet 3; on this said bracket (9) sheet 3 is a piece formed and
accommodated with a bearing (g), sheet 3 and in this bearing is placed a short
spindle having fitted upon one end a bevil wheel (3), sheet 3 and at the other end
a ratchet wheel (G) sheet 3. We also form a lever (S) sheet 3 which is placed on a
boss provided upon the ratchet wheel (G) sheet 3; at one end of this lever (S), is
placed a catch ($1), sheet 3 which is allowed to work loose on a small ordinary pin
or stud; to this lever (S) sheet 3 is fitted a loose stud having a hole provided in it,
through which is passed & secured a rod (m²) sheet 12 & 3; this rod forms the
connection between the stud in the slot (M²) in lever (M), sheet 1. 2. & 3.
We also prepare a bracket or carriage (0) sheet 3 of suitable form, and strength
arranged to carry the large washered saw carrying spindle, between these washers
the saw is placed; at the other end we fix a worm-wheel (F) sheet 3; on this saw
bracket or carriage (0) sheet 3 we form a bearing provided to receive the worm
spindle, one end of which is fixed the worm to operate the worm wheel (F) sheet 3,
and at the other end of this said spindle is a bevil wheel (4), which is geared up
with wheel (2) sheet 3 on the spindle that passes through the hollow stud or pivot.
It will be observed by the aid of the accompanying sheet of drawings (front view
Fig. 1), and (side view Fig. 2) sheet 3, that any upward or downward motion given
to lever (M) would so move the connecting rod and lever (S), to which it is
connected; hence the ratchet wheel (G) is moved; thus giving a portion of a revolution
to the bevil wheels (3. 1. 2. 4); the worm being on the same spindle as bevil
wheel (4), is also partially moved round, causing the worm wheel (F) simultaneously
to be revolved, and therefore the saw on the saw carrying spindle is revolved.
The advantages obtained are saving of time, greater durability of saws owing to
increased accuracy in sharpening: A saw may be put on the machine and sharpened
without requiring more than the occasional attention of an attendant, and without the
slightest danger of any injury resulting to the saw. The saw is sharpened truer,
better and superior than by any other method of sharpening saws; and more
especially the temper of the saw is not varied or impaired.
The machine is also applicable for sharpening other cutters, or milling tools, and
for dressing the teeth of wheels.
Having now particularly described, and ascertained the nature of our said invention,
and in what manner the same is to be performed, we wish it to be clearly
understood, that we do not confine ourselves to the exact details herein shown, and
delineated in this Specification, and accompanying sheets of drawings, but that
alterations may be required or made without departing from the principles of this
said Invention, we declare that what we claim is :-
1st. The entire combination, and application of parts as substantially described
in this specification, and delineated in the sheets of drawings, accompanying
the same.
2nd: The tensional spring (K) sheets 1. 2. 3 in combination with the oscilating
(tee) T shaped carriage, or spindle bearing (I) sheets 1. 2. 3.
3rd. The combination of the lever (M), and connecting lever (L), and stud (2)