Improved Means for Manufacturing Metallic Ribbon, especially applicable for Battery Electrodes.
Year: 1898

page_text: Date of Application, 20th Dec., 1898-Accepted, 28th Jan., 1899
COM DIE SIECINICATION.
Improved Means for Manufacturing Metallic Ribbon, especially
applicable for Battery Electrodes.
We, THE POROUS ACCUMULATOR COMPANY LIMITED, and JOHN CHARLES HOWELL,
Electrical Engineer, both of 24, Queen Victoria Street, London, 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 :-
This invention relates more particularly to means for producing the coiled metallic
ribbon electrodes referred to in the Specification of Patent Application No. 30427
of 1897.
It is well known that when a suitably ground slide rest tool is presented to a piece
of metal revolving in a lathe that if the tool be caused to advance in a direction
parallel to the axis of the revolving metal a long curling shaving will be produced,
the section of this shaving depending on the shape of the cutting edges of the tool
and the rate of its advance. By substituting a metallic tube for the usual solid
revolving metal and placing a tool with a single cutting edge extending from the
periphery of the revolving tube to its interior edge the whole of the metallic tube can
be converted into a long curled shaving by causing the tube to revolve and the tool
to advance at a slow rate in a direction parallel to the axis of the revolving
tube.
This invention relates to apparatus for so producing and at the saine time for
gathering up this shaving as fast as it is produced, and coiling it upon a mandrel
so that it forins a spiral of as many, or fewer turns as were originally required of the
tube to produce it. The spiral coils may be so compressed that they do not occupy
a very much greater space than the original piece of metal from which they are cut,
or they may be extended so that an air space separates each individual turn from its
neighbour. By causing the spiral to have fewer turns than the number of turns of
the tube from which it has been cut the shaving may be bent in and upon itself so
as to become radially crinkled, and this crinkling tends to occupy portion of the air
space formed between each individual coil when the spiral is so made as to occupy
a longer space than the tube from which it has been produced.
In the accompanying drawings which form part of this specification―
Fig. 1 is a side elevation of apparatus made in accordance with this invention.
Fig. 2 is a plan view of same."
Fig. 3 is a plan view partly in section on a larger scale of the main portion of the
machine.
Fig. 4 is an end elevation showing part of the driving gear, and
Fig. 5 is an elevation partly in section of part of the tail stock and connected
parts.
It will be noted that much of the mechanism is simply that of an ordinary lathe
and requires little or no description.
In the drawings 1 represents a mandrel head stock mounted upon a planed bed
supporting the hollow mandrel 2 which is caused to rotate by driving the cone
grooved pulley 3 by any suitable means. On an extension of this mandrel is carried
a single pitch worm 4 which gears into a worm wheel 5 attached to a spindle 6
supported in a swivelling bracket 7 in order that gears of different sizes may be from
[Price 8d1

page_text: time to time employed. Upon this spindle 6 is fixed a loosely fitting bevel wheel 8
which can by means of the claw clutch 9-10 sliding on a feather on the spindle be
caused to drive the bevel wheel 11 which is attached to the right and left handed
leading screw 12 which extends the whole length of the machine bed. If this leading
screw is made with a thread of 10 turns to the inch on that portion which operates
the feed of the cutting tool and of 2 turns to the inch on the portion which causes
the tail stock to be withdrawn the result in practical working will be the manufacture
of a spiral coil occupying a space of 5 times the length of metal from which it
is cut.
To the first mentioned portion of the leading screw is attached by the usual form
of nut a slide rest 13 so that it can be caused to travel up and down the bed.
To the second portion of the leading screw which is threaded in the opposite
direction is attached by a nut 14 the tail stock 15 supporting the hollow mandrel 16.
This mandrel 16 is caused to rotate in a similar direction to the mandrel 2 by means
of the toothed wheels 17, 18, 19 and 20 fixed upon the respective mandrels and the
back shaft 21 a portion at least of such shaft being square so as to provide for
the rotation of the mandrel 16 independent of the position it may occupy on the
machine bed.
Upon the screw nose of the mandrel 2 is fixed a three-jaw chuck 22 the movement
of the jaws being controlled by the lever 23 and upon the nose of the mandrel 16 is
fixed a three-jaw chuck 22 controlled by the lever 25.
The right hand end of the back shaft 21 is supported by a bracket 26 and upon
its end is fixed a grooved wheel 27 gearing by means of a band into the wheel 28
loosely fitted on to the end of the leading screw 12 with which it can be connected by
the claw clutch 29 sliding on a feather on the leading screw.
Immediately in front of the machine bed is fixed a sliding rod 30 upon the opposite
ends of which by means of suitable crank levers 31 and 32 the claw clutches 9-10
and 29 can be moved so that either one cau be in gear but not the two together.
Upon this sliding rod 30 are fixed two adjustable stops 33 and 34 so attached that
the movement of the slide rest 13 takes either clutch out of
gear.
The sliding rod can also be moved by the hand lever 35.
The tail stock 15 is capable of a supplementary movement along the bed con-
trolled by a quick pitch screw 36 attached to the tail stock 15 so that by half a turn
of the handle 37 the tail stock can be moved about inch in either direction
independently of the movement caused by the rotation of the leading screw 12, this
independent movement being permitted by making the upper portion 38 of the
nut 14 which enters the tail stock 15 of less size than the opening in such tail
stock.
The gear wheels 17, 18, 19 and 20 may have such a number of teeth as to provide
for a rotation of the mandrel 16 at one-fifth the rate of rotation of the mandrel 2.
The method of producing a crinkled coil spiral in a machine such as has been
described is as follows:-
The cutting tool 39 is inserted in the tool post of the slide rest 13 and is prefer-
ably of a V section piece of tool steel with the top face ground to an angle of
approximately 60° with the left hand side, and a front face ground to an angle of
approximately 45° with the side the tool being accurately adjusted so that the
cutting edge is strictly radial to the axial line of the mandrel centres.
The slide rest 13 is then brought to the right hand extremity of its, run, this
movement bringing the tail stock with its chuck 24 approximately within in. of
the knife in the slide rest 13. The metallic tube 40 to be operated upon is now
passed through the mandrel 2 so that its right hand edge touches the knife in the
slide rest 13 and is clamped in this position by moving the lever 23 closing the
jaws of the chuck 22. A steel spindle 41 of a diameter slightly less than the bore
of the metallic tube 40 is now passed through the back inandrel 16 so that it passes
for the desired length of spiral coil up the metallic tube 40, and is clamped by a
movement of the lever 25 controlling the jaws of the chuck 24 on the tail stock
mandrel 16. If the machine be then started and lever handle 35 moved to the

page_text: right it will put the leading screw 12 into gear causing the slide rest 13 to move
towards the left and the tail stock 15 to the right. To cause the first few turns
of the metallic ribbon 42 to bind upon the spindle 41 and the chuck 24 this
movement of the tail stock to the right has to be counteracted by a quick movement
of the handle 37 which throws the chuck 24 slightly back toward the left so that
the first portion of the ribbon shaving is jammed hard against the face of the chuck
and also on the spindle. The metallic tube 40 will now continue to be cut into a
shaving which as it is very thin is crinkled as fast as it is produced owing to the
speed of rotation of the spindle being so much less than that of the tube and the
crinkled ribbon is wound upon the retreating spindle until the slide rest 13 comes
in contact with the adjustable stop 33 and moves the sliding rod 30 so that the
clutch 9-10 is put out of gear and the movement of the slide rest ceases and the
ribbon is cut off. The handle 37 is now brought back to its original position thus
increasing the retreat of the tail stock so that the spindle on moving the lever
opening the jaws of the chuck on the tail stock mandrel, can be removed.
A movement to the left of the hand lever 35 now puts the clutch 29 into gear
reversing the motion of the leading screw so as to quickly bring both slide rest and
tail stock into position for starting another cut.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is-
1. In apparatus for the manufacture of metallic ribbon the combination with
mechanism adapted to cut a metal tube of mechanism adapted to collect and spirally
wind the ribbon so produced, substantially as described.
2. In apparatus for the manufacture of metallic ribbon the combination with
mechanism a lapted to cut a metal tube of mechanism adapted to collect, crinkle
and spirally wind the ribbon so produced, substantially as described.
3. In apparatus for the manufacture of metallic ribbon the combination with the
slide rest and cutting tool of a leading screw and a tail stock operated by such leading
screw in L reverse direction to the motion of the slide rest, substantially as
described.
4. In apparatus for the manufacture of metallic ribbon the combination with the
slide rest and cutting tool of a leading screw, a tail stock operated in reverse
direction to the slide rest by such leading screw and means whereby a slight inde-
pendent movement may be imparted to the tail stock, substantially as described.
5. In apparatus for the manufacture of metallic ribbon the combination with the
chuck carrying the material to be operated upon of a slide rest, a mandrel carried
by the tail stock, gearing operating the chuck and mandrel at the same or different
speeds, and a leading screw operating the slide rest and tail stock in opposite directions
at the same or different speeds, substantially as set forth.
6. In apparatus for the manufacture of metallic ribbon the combination with the
chuck carrying the material to be operated upon and of the mandrel upon which the
ribbon is to be collected, of gearing operating said chuck and mandrel, a leading
screw, a slide rest and a tail stock operated by said screw, a rod operated by the slide
rest and adapted to throw the leading serew out of gear with the chuck and
reversing gear to enable the slide rest and tail stock to be reset in starting position,
substantially as set forth.
Dated the 20th day of December 1808
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicants.