Improvements in Machines for Cutting Tooth Wheels.
Year: 1891

page_text: Date of Application, 26th Nov., 1891
Complete Specification Left, 26th Aug.. 1892-Accepted, 8th Oct.,. 1892
PROVISIONAL SPECIFICATION.
Improvements in Machines for Cutting Tooth Wheels.
I, ROBERT JOHN ALPE of 128 Fentham Road, Birchfield Warwickshire,
Engineer, do hereby declare the nature of my said invention to be as follows:-
My invention has for its object, improvements in machines for cutting tooth
wheels being particularly applicable for cutting chain wheels such as those now in
use upon cycles and by means of which such wheels are automatically cut without any
attention further than the placing of the blank upon the machine and the removal
of the finished wheel.
worm.
In carrying my invention into effect the chuck in which the blank is fixed is
mounted under the cutting tool upon one end of a shaft working in bearings in a
suitable head formed upon a carriage formed to have a reciprocating movement
The
upon the main bed a divided disc being fixed to the other end of the shaft.
sliding carriage is operated in its backward and forward travel by an eccentric
which is mounted upon the head & which is in turn revolved by a worm wheel and
Upon the shaft of this worm wheel and eccentric an elliptical tooth wheel
is mounted and gears into a similar elliptical tooth wheel from which a second shaft
is revolved by bevil wheels. This second shaft runs parallel with the shaft upon
which a divided disc is mounted and the disc being divided by slots into a similar
number of divisions to the number of teeth required in the wheel a spring lever
engages with the slot and locks the divided wheel stationary while the tooth is
being cut in the wheel on the chuck. Upon the secondary shaft a cam is mounted
so that when the time arrives for the divided wheel to turn for the next tooth to be.
cut the cam withdraws the locking lever and a pawl upon the same shaft engages
with a ratchet which is mounted upon the shaft of the divided wheel and thereby
turns the divided disc and the wheel being cut into position for the next tooth to be
formed at which time the cam is again out of operation and the divided disc is
locked. By the action of the two elliptical cogs the cam and ratchet arrangement
is quicker in its action while unlocking turning and re-locking the disc as the wheel
being cut is then clear of the tool.
The carriage is caused to make its return journey after the cutting of the tooth
has been effected by means of a large and small tooth bevil or worm wheels inter-
mediate clutch for throwing either one or the other into operation the small tooth
bevil or worm wheel operating the carriage worm on the forward journey and the
large tooth or bevil operating it on its return journey the one or the other being
thrown in or out of operation by a dog tooth or other suitable clutch arrangement
this being effected automatically by two studs upon the travelling carriage which at
the required limit of its travel operate a lever connected with the clutch which
disengages the clutch from the one wheel at which point an inclined spring stud
actuates the lever sufficiently for the clutch to engage with the other and this spring
stud is capable of being depressed by a handle and cam so that the clutch may be
made to remain out of gear with both wheels in which case the carriage would
remain stationary.
For automatically stopping the machine when all the teeth are cut a stud is
provided upon the division disc which stud operates a lever and thereby throws the
band from the fast to loose pulley after the last tooth has been cut.
By means of a lever connected with the eccentric for actuating the carriage and
several holes in the connection between that and the bed I may make the carriage
of the travel adjustable and also increase the power of the eccentric.
In connection with the working of the tool I provide an oil pump which continually

page_text: pumps oil in connection with the tube which then runs back to the oil well to be
used again and again.
The position of the blank with regard to the tool is adjusted preferably by incans
of a screw and divided disc which raises or lowers the whole carriage bearing the
blank and the carriage may thus be raised until the worm wheel in the head is clear
of the operating worm and thus allowing the carriage to be worked by haud.
Dated this 25th day of November 1891.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent.
COMPLETE SPECIFICATION.
Improvements in Machines for Cutting Tooth Wheels.
I, ROBERT JOHN ALPE of 123 Fentham Road Birchfields, Warwickshire,
Engineer, do hereby declare the nature of my said 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 object improvements in machines for cutting tooth
wheels being particularly applicable for cutting chain wheels such as those now in
use upon cycles and by means of which such wheels are automatically cut without
any attention further than the placing of the blank upon the machine and the removal
of the finished wheel.
In carrying my invention into effect the chuck in which the blank is fixed is
mounted under the cutting tool upon one end of a shaft working in bearings in a
suitable head formed upon a carriage formed to have a reciprocating movement,
upon the main bed a divided dise being fixed to the other end of the shaft. The
sliding carriage is operated in its backward and forward travel by an eccentric
which is mounted upon the head and which is in turn revolved by a worm wheel and
worm. Upon the shaft of this worm wheel and eccentric an elliptical tooth wheel
is mounted and gears into a similar elliptical tooth wheel from which a second shaft
is revolved by bevil wheels. This second shaft runs parallel with the shaft upon
which a divided dise is mounted and the disc being divided by slots into a similar
number of divisions to the number of teeth required in the wheel a spring lever
engages with the slot and locks the divided wheel stationary while the tooth is being
cut in the wheel on the chuck. Upon the secondary shaft a cam is mounted so that
when the time arrives for the divided wheel to turn for the next tooth to be cut the
cam withdraws the locking lever and a pawl upon the same shaft engages with a
ratchet which is mounted upon the shaft of the divided wheel and thereby turns
the divided disc and the wheel being cut into position for the next tooth to be
formed at which time the cam is again out of operation and the divided disc is
locked. By the action of the two elliptical cogs the cam and ratchet arrangement.
is quicker in its action while unlocking, turning and relocking the disc as the wheel
being cut is then clear of the tool.
The carriage is caused to make its return journey after the cutting of the tooth
has been effected by means of a large and small tooth bevil or worm wheels inter-
mediate clutch for throwing either one or the other into operation the small tooth
bevil or worm wheel operating the carriage worm on the forward journey and the
large tooth or bevil operating it on its return journey the one or the other being
thrown in or out of operation by a dog tooth or other suitable clutch arrangement
this being effected automatically by two studs upon the travelling carriage which
at the required limit of its travel operates a lever connected with the clutch which
disengages the clutch from the one wheel at which point au inclined spring stud
actuates the lever sufficiently for the clutch to engage with the other and this
spring stud is capable of being depressed by a handle and cam so that the clutch
may be made to remain out of gear with both wheels in which case the carriage
would remain stationary.

page_text: For automatically stopping the machine when all the teeth are cut a stud is
provided upon the division disc which stud operates a lever and thereby throws
the band from the fast to loose pulley after the last tooth has been cut.
By means of a lever connected with the eccentric for actuating the carriage and
several holes in the connection between that and the bed I may make the travel
of the carriage adjustable and also increase the power of the eccentric.
In connection with the working of the tool provide an oil pump which con-
tinually pumps oil in connection with the tube which then runs back to the oil well
to be used again and again.
The position of the blank with regard to the tool is adjusted preferably by means
of a screw and divided disc which raises or lowers the whole carriage bearing the
blank and the carriage may thus be raised until the worm wheel in the head is clear
of the operating worm and thus allowing the carriage to be worked by hand.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto two double sized sheets of drawings upon
which I have fully illustrated the nature of my said improvements.
Figure 1, is a broken off side elevation of the one end or head of my machine.
Figure 2, is an end elevation of Figure 1.
Figure 3, is a broken off elevation of the reverse side of the machine to Figure 1.
Figure 4, is a side elevation of the other end or foot of the machine.
Figure 5, is a plan of Figure 4.
is
The chuck A in which the blank B is fixed is mounted under the cutting tool
upon one end of the shaft working in the bearings in the head D formed upon
the sliding carriage D' formed to have a reciprocating movement upon the main
bed E a divided dise being fixed to the other end of the shaft. The sliding
carriage D is operated in its backward and forward travel by the eccentric F
which is mounted upon the head D and which is in turn revolved by the shaft .J
through the worm wheel 2 and worm d³ mounted within the head. Upon the
shaft of this worm wheel and eccentric F an elliptical tooth wheel
mounted and gears into the similar elliptical tooth wheel from which a second
shaft His revolved by the bevil wheels and ². This second shaft H runs
parallel with the shaft K upon which the divided disc M is mounted and the disc
being divided by slots m¹ into a similar number of divisions to the number of teeth
required in the wheel B the spring lever m engages with a slot m' and locks the
divided wheel M stationary while the tooth is being cut in the wheel B on the
chuck A. Upon the secondary shaft H a cam is mounted so that when the time
arrives for the divided wheel N to turn for the next tooth to be cut the run 4³
withdraws the locking lever m' and a pawl upon the same shaft engages with
the ratchet wheel N which is mounted upon the shaft K of the divided wheel M
and thereby turns the divided disc M and the wheel B and the wheel B which is
being worked into position for the next tooth to be formed by which time the
cam is again out of operation and the divided disc M is locked by the lever m³.
By the action of the two elliptical cogs gland g the cam ³ and ratchet / arrangement
is quicker in its action while unlocking turning and relocking the disc M as the
wheel being cut is then clear of the tool.
The carriage is caused to make its return journey quicker after the cutting of
the tooth has been done this being effected by means of the bevil and worm wheels
with intermediate clutch for throwing either one or the other into operation as
shown at Figures 4 and 5 the worm wheel P operating the carriage worm through
the shaft J on the forward journey and the tooth or bevil R operating it on its
return journey the one or the other being thrown in or out of operation by the dog
tooth clutch S which has a feather working in a groove in the shaft J the operation
of the clutch S being effected automatically by two studs upon the traveling
carriage D' which at the required limit of its travel operates the rod T which is
connected with the clutch $ by the lever S' sufficiently for the spring stud U to
finish the movement by actuating the lever S sufficiently to cause the clutch to
engage with either one side or the other the forward movement being effected

page_text: slowly by the worm wheel P from driving shaft P' and the return movement
quickly by the bevil R through the shaft. This spring stud U is capable of
being dropped by a handle and cam u so that the clutch may be made to
remain out of gear with both wheels in which case the carriage would remain
stationary.
The position of the blank with regard to the tool is adjusted preferably by
means of a screw and divided disc which raises or lowers the whole carriage D
bearing the blank, and the carriage may thus be raised until the worm wheel and
bevil are clear of the operating shafts thus allowing the carriage to be worked
by hand.
In place of one blank I may place two blanks side by side to be worked at the
same time.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :―
The improvements in machines for cutting toothed wheels whereby the carriage
is automatically reciprocated and the division plate M operated substantially as
and for the purpose herein set forth and shown upon the accompanying drawings.
Dated this 25th day of August 1892.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent.