Improvements in Pemberton's Spiral Moulding Machine ( for Increasing the Scope of the Machine and Rendering the Machine Capable of Automatically Turning Articles.
Year: 1893

page_text: Date of Appl cation, 23rd June, 1893
Complete Specification Left, 14th Mar., 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Pemberton's Spiral Moulding Machine (Patent
No. 6163/91) for Increasing the Scope of the Machine and
Rendering the Machine Capable of Automatically Turning
Articles.
I ALGERNON CHARLES PEMBERTON of Ravenscar, Pinner in the County of
Middlesex Colonial Broker do hereby declare the nature of my invention for
IMPROVEMENTS IN PEMBERTON'S SPIRAL MOULDING MACHINE (PATENT
No. 6163) FOR INCREASING THE SCOPE OF THE MACHINE, AND RENDERING
THE MACHINE CAPABLE OF AUTOMATICALLY TURNING ARTICLES to be as
follows:-
My invention consists in the following alterations and additions to the above
machine whereby its scope is much enlarged and it is rendered capable of auto-
matically turning articles direct from a rod-with or without screwed portions as
may be desired-such as stoppers for screw stoppered bottles, cotton spools,
balls etc.
To achieve this result I firstly make an alteration in the feeding mechanism by
substituting for the fixed rack or internal wheel from which the feeding rollers
originally obtain their forward motion, a complete internal wheel, with an over-
banging toothed flange (in which the pinion can run round as bither-to-fore) but
with its centre arranged so that it can revolve on the mandrel or remain stationary
when desired. I then fix in a convenient position a shaft, which is connected with
the mandrel by spur or other gearing, and on this shatt I place a series of cams or
eccentrics, so arranged that one is connected with a friction clutch or catch
engaging the internal wheel, in such a manner that it can be held rigid at
certain times during which the mandrel is revolving and then released for another
period.
The other cams are connected by levers or rods with carriages carrying the
cutters which may be either revolving ones, or fixed of gouge V or chisel shape.
These carriages are made to slide on their ways so that the cutters can be run in
and out of cut as desired by the preconcerted motion of the cams. The action of
these improvements is that the blank, to be worked up, is propelled forward for a
certain distance with a regular screw like motion during which time the cutter
designed to cut the thread is at work, then this cutter is withdrawn and as the
catch holding the internal wheel is released it runs round with the mandrel and at
once stops the forward motion of the blank which then only revolves, during which
time the other cutter or cutters come into action and finish shaping up the work,
and if needs be cut off the finished article. The cutter shafts are made adjustable
so that they can be swung to any angle desired with the line of the work and are
when of the revolving type driven by belts from an overhead motion as in the
original machine.
Dated this 22nd day of June 1893.
A. C. PEMBERTON

page_text: COMPLETE SPECIFICATION.
Improvements in Pemberton's Spiral Moulding Machine (Patent
No. 6163/91) for Increasing the Scope of the Machine and
Rendering the Machine Capable of Automatically Turning
Articles.
I ALGERNON CHARLES PEMBERTON of "Ravenscar" Pinner in the County of
Middlesex Colonial Broker do hereby declare the nature of this invention and in
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
what
My invention consists of the following alterations and additions to the above
machine whereby its scope is much enlarged and it is rendered capable of auto-
matically turning articles direct from a rod-with or without screwed portions,
as may be desired-such as stoppers for screw necked bottles cotton spools
trenails etc.
To achieve this result I make the following alterations and additions to the
machine to more easily describe the same I attach three sheets of drawings, of
which number 1 is a plan of the bed of the machine, number two is a side elevation,
and number three consists of three figures of which number one is a front elevation
half in section, number two a detail sketch of the ratchet wheel and cam for
causing the intermittent feed, number three a sketch of the quadrant plate and
change wheels for revolving the under shaft.
Instead of the fixed annular or internal wheel in the original machine I substitute
either an internal wheel with an overhanging flange or a spur wheel M³ with a boss
which can revolve on the mandril Q, attached to this wheel is a ratchet wheel or
disc N which is engaged by the upper end of the bell crank lever O, this lever
which moves on a pin O¹ has at its other end a roller which runs over a cam
placed on a shaft AG which is attached to the bed of the machine in any con-
venient position. This shaft is revolved in connection with the mandrel Q by
means of the gear wheels S-S-S, which for facility of changing the ratio of
speed with which the shaft revolves in connection with the mandrel, are placed on a
quadrant plate as is usual in a screw cutting lathe.
On this same shaft A G are attached one or more cams which serve to bring the
cutters in or out of cut, the cutter shafts being mounted on sliding or swivelling
carriages in the drawings Cc and C a are the sliding carriages and C and C¹ the
cutter shafts. The cutter carriages are connected up by means of connecting
rods R and R' to the ends of two bell crank levers, which have at their other end
rollers running over the cams AB and A C. To bring the cutters back any
convenient means may be used such as a spiral spring or as shown the ends of the
levers may be counterbalanced with weights AJ and A I.
It is not necessary that the wheel N which is shown with ratchet teeth be of
this form a plain disk will do providing that the end of the lever O is made to
press hard enough against so as to grip it by friction on y. For some purposes this
is the best method.
The action of the machine is then as follows-The blank to be worked up is fed
through the mandrel as usual, but instead of being propelled forward with a regular
spiral motion it can be arranged so that the spiral motion is only continued so far
as it is desired to either cut a thread on the work or bring up enough of the blank
to be turned. When this has been accomplished the cam Z is so arranged that it
allows the lever O to drop and then the upper end disengages itself from the
ratchet wheel or disk N, which being no longer held fast at once commences to
revolve and as the wheel M' is connected to the same boss it also runs round with
the mandril which causes the pinion engaging with it M, through the train of
wheels M', to cease its revolutions as it has no longer any resistance.
As this

page_text: pinion M is the first motion from which the feed rollers E-E derive their motion
through the spur gearing Y-Y-Y and the worm gears G-G in connection with
the worm H on the same shaft as the pinion M, they at once cease to feed the
blank forward and it is then only revolved during which time the cutter or cutters
requisite to turn up the work come into action through the motion of the cams in
connection with them and if need be cut off the finished article.
In the drawings the cutter shafts are made to swivel through a line drawn through
their centre for facility of adjusting them to the correct angle necessary for the
work and are of the usual revolving type; but I do not limit myself to this form
of cutter for it is advantageous for some work to employ fixed cutters of V or
gouge shape. I also do not limit myself to the particular form and design of
machine described, which can be varied to suit different styles of work.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed I declare that I claim
1. The addition of the shaft attached to spiral mould-machines geared in
connection with the mandril by means of spur or other gearing, carrying a cam
or series of cams for actuating the cutters and regulating the feed of the
machine.
2. The use of sliding carriages for the cutters, which can be brought into cut by
means of levers and connecting rods.
3. The substitution of the loose internal wheel or spur wheel, which can revolve
on the mandril, in place of the fixed circular rack or internal wheel.
4. The use of the ratchet wheel in connection with the above loose internal or
spur wheel actuated by a cam and lever and the mechanical equivalent for this a
friction disc and clutch.
Dated this 21st day of December 1893.
A. C. PEMBERTON.