Improvements in Connection with Wood Turning Machines.
Year: 1886

page_text: Date of Application, 22nd June, 1886.
Complete Left, 21st Mar., 1887.
Complete Accepted, 24th. May, 1837.
Improvements in Connection with Wood Turning Machines.
JOHN WILSON DULSTON of 243 Drake Street, Rochdale, in the County of Lancaster,
Engineer do hereby declare the nature of this invention to be as follows:-
My invention has for its object improvements in the mechanism or details of Wood
Turning Machines, such details being confined to the Reversing Motion, Polisher,
and the Revolving Cutters Holder, Driving and Traversing Gear.
My invention consists essentially of the Reversing Motion, which is so arranged as
to allow of the carriage being stopped and reversed automatically, at any position of
the traverse. This is accomplished by having a long rod supported horizontally along
the bed, and free to slide longitudinally in its supports or bearings. In connection
with this rod, is a vertical tumbler or lever, swivelling upon a fixed centre in the
front of the bed. The upper extremity of this lever, is in contact with a hand
reversing lever, used especially to throw in and out of gear, a set of toothed wheels.
The shape of the tumbler or lever, is such, as to transmit, any motion received by
the rod, which is caused through the carriage coming in contact with stops fixed at
convenient positions along the rod, and thus convey any such motion automatically
to the tumbler and thence to the wheels, thereby changing the direction of the
traverse of the carriage.
A spiral spring and catch, or an equivalent piece of mechanism, will be used for
bringing the rod back quickly, and retaining it in certain positions, to suit the gear
wheels.
The Polisher, consists essentially of a pair of arms, which carry a revolving emery
disc or polisher arranged to swivel freely upon a stud attached to or fixed in
connection with the tool holder.
The polisher is pressed lightly upon the surface of the object or substance, requiring
to be polished, by the action of an adjustable spiral spring. A rapid motion is com-
municated to the polisher from the overhead gear, and I may use toothed gearing
or other suitable mechanisin, for communicating motion from the polisher spindle
to the revolving cutters spindle or vise versa. The driving and Traversing gear
consists essentially of a long shaft provided with a key way-upon which is mounted

page_text: a flanged pulley, or drum, having attached within its boss a key, for the purpose of
allowing the drum freedom to slide throughout, its length and yet simultaneously
to revolve with the shaft.
An endless band is arranged to pass over guide pulleys, and upon one portion
is secured a fork, which fits. nicely outside one point of the circumference of the
pulley, whilst another portion of the rope or band is secured to the carriage.
Consequently any motion of the carriage must produce a corresponding motion of
the flanged or driving pulley and thereby always tend to keep the belt, rope, or
strap, in a line, with the small pulley on, the revolving cutters spindle, which moves
bodily along with the carriage.
Dated this 21st day of June 1886
COMPLETE SPECIFICATION.
Improvements in Connection with Wood Turning Machines.
JOHN WILSON DULSTON of Drake Street Rochdale in the County of Lancaster
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:-
My invention has for its objects improvements in the mechanism or details of Wood
Turning Machines such details being confined to the Reversing Motion, Polisher, and
the Revolving Cutters Holder, Driving and Traversing Gear.
My invention consists essentially of the reversing motion, which is arranged so as to
allow of the carriage being stopped and reversed automatically at any required
position of the traverse. This is accomplished by having a long rod supported
horizontally along the bed and free to slide longitudinally in or upon its bearing
supports. In connection with this rod there is a vertical tumbler or lever whose
lowest extremity swings or swivels upon a fixed stud or centre which is secured into
the front of the lathe bed. The upper extremity of this lever is in contact with the
hand reversing lever which is used especially to throw in and out of gear or engage
and disengage a set of toothed wheels.
The shape of the lever or tumbler is such as to transmit any motion received by the
rod consequent upon the carriage coming in contact with stops fixed at convenient
positions along the rod, and thus convey all such motion automatically to the tumbler
or lever, and thence to the wheels: thereby changing the direction of the traverse of
the carriage.

page_text: A spiral spring and catch or equivalent piece of mechanism is used for bringing the
rod quickly back and retaining it in certain positions to suit the gear wheels.
The Polisher consists essentially of a pair of swing arms carrying a revolving emery
wheel or grinder disc, and is arranged to swivel freely upon the stud or cutter holder
centre in connection with the tool holder.
The Polisher is pressed lightly upon the surface of the object or substance to be
polished by an adjustable spiral spring or weights.
A rapid motion of revolution is communicated to the polisher from the overhead
gear.
I may use toothed gearing or other suitable mechanism for communicating motion
from the polisher spindle to the revolving cutters spindle or vice versa.
The driving or traversing gear consists essentially of a long shaft provided with a
key way upon which there is mounted a flanged pulley or drum. Within or attached
to the boss of the pulley is a key which is used for the purpose of allowing the drum
sufficient freedom to slide along the shaft but simultaneously to ensure its revolving
with it.
An endless band is arranged to pass over guide pulleys which are supported or fixed
upon studs secured into the bed, and overhead hangers respectively. Affixed to one
part of this band or rope there is a fork which fits nicely around or encircles a part of
the circumferance of the pulley whilst another part of the rope or band or chain is
secured to the carriage by adjustable screws or hooks: consequently any motion of
the carriage must produce a corresponding motion of the flanged driving pulley, and
thereby always tend to keep the strap or belt in a line with the small pulley upon the
revolving cutter spindle which moves bodily along with the carriage.
the
In order to describe the nature of my said invention and the manner of performing
same, I have caused to be annexed to this specification; the accompanying sheet
of Drawings illustrative of the application of my improvements in Wood Turning
Machines.
With respect to the before referred to sheet of drawings and the figures and letters
of reference thercon indicated
Fig. 1, represents an elevation of the traversing and driving gear.
Fig. 2, clo. end elevation of
Fig. 3,
do.
do.
do.
an end elevation of the Machine, with Grooved, Rope Guide
Pulleys.
Fig. 4, represents a front elevation of
do.
do.
Fig. 5, & 6, do.. plan and elevation of Polishing Motion or Polisher.
The various parts of mechanism in each of the figures are denoted by the same
letters of reference.
"
In fig. 4, "g" represents the sliding or traversing carriage "e" is the tumbler
lever, which is fixed upon a centre m. The horizontal rod "s" is connected to
this lever at "" and any motion produced by the carriage coming against the
adjustable stop" will be multiplied at the point "n" of the lever, and thus raise
the gear wheels, so as to ensure the reversal of the carriage.
The lever catch "h" is used to prevent the gear wheels becoming disengaged until
the return stroke of the carriage is completed, when contact of the latter will cause
the catch to be liberated from the teeth in the rod "." The spring "o" will then
exert itself in order to bring the gear wheels into their first position, preparatory to
the forward traverse of the carriage. The rod "" slides upon the rollers"."
Instead of the carriage coming into contact with the stop ""I may in some cases
provide an eccentric & rod, to actuate the same, and being geared up by wheels
from the carriage its action or throw, would be much quicker than the travel of the
carriage.
Upon the tool holder spindle "," there is mounted a couple of swing arms 26 24
which carry the revolving polisher or grinder disc "s."
A rapid motion of revolution is communicated from the pulley "" through the
gearing wheels, to the polisher. At the same time any swinging or forming motion
communicated from the templet or spoke or other object, which is being operated

page_text: upon by the polisher, would not tend to disengage the gearing wheels".
"y" in
consequence of the wheels being capable of revolving round each other, owing to the
rigidity of the swivelling arms u u. The polisher may be kept in contact with the
object being polished by the action of weights or springs, which may be attached in
any convenient position.
แ
This arrangement of polishing maintains the same strap tension throughout. The
driving and traversing gear shaft "d" is mounted in hangers "b, b." The pulley C
is keyed upon the shaft so as to allow of its traversing longitudinally along, but yet be
compelled to revolve with the shaft. The rope guide pulleys a, a, a, a, are fixed
into the hangers and bed respectively and the rope "" is attached to the carriage by
adjustable hooks, 2. To another portion of the rope there is attached a fork "f"
which encircles the flange of the pulley-and thus keeps it always vertically over the
revolving cutters driving pulley " "because the pulley must travel along with the
fork and consequently the rope, which latter is actuated from the carriage.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is
1st. The combination of mechanism for automatically elevating or depressing the
gear wheels, thereby reversing the direction of the carriage traverse, substantially as
illustrated and described.
2nd. The arrangement of mechanism, or swing arms, and polisher, driving gear,
whereby the driving strap tension is prevented from being influenced by the swing
of the arms, substantially as herein before described & illustrated.
3rd. The combination of driving pulley, with the rope band, or equivalent substance
for compelling the pulley to move in conformity with the Cutters, driving pulley as
and for the purposes hereinbefore described and illustrated.
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