Improvements in the Method of and Machinery for Manufacturing Drying Machine and similar Cylinders
Year: 1891

page_text: Date of Application, 28th Aug, 1891.
Complete Specification Left, 25th June, 1832-Accepted, 18th Aug. 1898
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Machinery for Manufacturing
Drying Machine and similar Cylinders.
I, THOMAS LORD of 28 York Street, Todmorden, in the County of York,
Drying Cylinder Maker do hereby declare the nature of this invention to be as
followe
My invention relates to cylinders for cloth and yarn drying machines and similar
sheet metal oylinders and consists in an improved method of manufacturing said
gylinders and improved machinery for this purpose. In the method of manufacture
hitherto used, the sheets for forming the cylinder are first bent on bending rolls,
then rivetted together and the cylinder thus formed is platished in a machine by
means of a weighted roller passed longitudinally backward and forward over the
oylinder while the latter f turned for a certain distance after each traverse of the
roller. In consequetice of this method of planishing the pylindrical form is altered,
the cylinder receiving a series of flat surfaces where the roller has passed over it
and becoming polygonal, while in consequence of the seams which cannot be
planished in this way the whole eylinder becomes three-cornered and has to be
brought back to a circular form by means of the end rings being forced in and by
being hammered along the seams, whereby a great amount of highly skilled hand
labour is entailed us all the stretching and buckling has to be worked out at the
ends, and the seams are sometimes strained in consequence of this stretching. The
object of my invention is to save this skilled hand labour and remedy. the other
disadvantages to a great extent, and I effect this by manufacturing the cylinder as
follows: I first planish the sheets for the cylinders by passing them cornerwise
through a special planishing machine with a reciprocating roller which passes over
the sheets diagonally or at any angle to their edges, the traverse of the roller
being preferably increased after each traverse aa the sheet passes into the machine
and decreases as it emerges from the same
This plantahing may be repeated at right angle manner hereinafter described.
the first planishing. After the
sheet has been straightened in this way I bend it by means of bending rolls and
put the sheets forming the oylinder together, after which I punch and rivet them
on a special punching and rivetting machine constrasted as hereinafter described,
By planishing the sheats while in their flat state and in a diagonal direction and
then bending them, the flat surfaces resulting from the old method of planishing
them after they have been bent and rivetted are entirely obviated and a perfectly
cylindrical surface is obtained which does not require subsequent hammering and
dreaming, while by rivetting the sheets after they have been thus planished and
bent the straining of the faints accurring with the old method by the subsequent
working out of buckles and flat placee is obviated,
The special machine for planishing the sheets diagonally or at an angle to their
edgas consists of uprights connected by a crossbeam or dide on which a carriage
with a vertical slide carrying a prossbowl is traversed by a sorow or equivalent
means backwards and forwards, the narew or other traversing mechanism being
driven by pulleys with reversing mechanisin in the ustial manner. The roller slide
is weighted by a loaded lever having a runner that mountsian teline at seah and
of the traverse and lifts the prossbowl off the sheet while the latter is moved
forward over a table by a pair of foed rolls and the straps are shifted for reversing,
these arrangemenſte being similar to those of the planishing machines at present in
abe.. My improvements for making the machine applicable for planishing the
sheets at an angle to their edges consist in making said inclines moveable and in so
arranging them that either of them can be shifted self-actingly, independently of the

page_text: other or kept stationary as may be required for adjusting the traverse to the
varying width and poaltion of the sheet under the crossrail, and in arranging the
strap shifting motion so that it is actuated at the end of each traverse by means of
mechanism attached to the inclines and moved along with them. This may be
done in the following manner; The strap shifting bar is notched on its upper side
and passes through a bush that can slide in a boss or brasket connected to the
incline against the pressure of a spring. The carriage is provided with a suitable
pallet or its equivalent which when the rannar on the weighted press lever begins
to mount the fooline strikes against a pawl mounted on sald bush and held off the
strap bar by a spring and forces it into one of the notches on the strap bar which
is then pushed along with the bush to one side till the tumbler lever of the
reversing motion passes the centre and by shifting the strap reverses the machine
or traverse. The pawl will then he lifted out of the notch of the strap þar and
the bush pushed out by the respective springs. A similar arrangement is of course
fitted to each of the inolines.
* The inclines are arranged to slide on the grassrull and each has a nut fixed to it
through which the guide sorew passes. The strap bar actuates a lover with two
pawls acting on two spur wheels, or two levers each with a pawl, sach spur wheel
being contented by gearing to one of the guide saraws. The pawls are made so
that they can be turned over to move the respective-wheel in either direction or be
put out of gear and in this way the inclines may be shifted in either direction at
each reversal or kept stationary and the length of traverse altered thereby as may
be required for adjusting it to the width and position of the sheet,
Y The arrangements for connecting the strap bar to the sliding bush may be varied
from those described as well as those for shifting the inalines. For instance a single
stationary guide screw may he used and the inclines fitted with nuts for the screw
so that they can rotate in the inclines but carry these with them and the nuts have
spur wheels attached to them which are actuated by pawls and levers worked by
the weighted press lover as its runner ascends or descends on the inclino, the pawls
being arranged to turn the nuts in either direction according to the position they
are placed in. Mechanisms are preferably arranged for lifting the pawls that shift
the Inolines out of action, when the inclines have arrived at the end of the cross-
slide or at abutments mounted thereon.
The reversing strap bar agtustes mechanism for imparting an intermittent rotary
feed moting to the feed rollers of which two pairs are used, one before. and ong
behind the prossalide and traversing pressbowl. These rollers may be placed
parallel to the oroßsslide and the sheet placed at an angle to the same and fed
forward in a direction rectangular to the arossalide, but by preferenco I place
the rollers at an angle, for instance of 45 degrees, to the orossalide and place the
skeet square to the rollers and feed it forward in an angular direction to the
crossslide,
My further improvement conéists in the arrangement of a machine for punching
and rivetting the planished sheets after they have been bent and cramped togethär
to form a cylinder, The machine frame is made similarly to that of an ordinary
punching machine with jaws deep enough to take in half the length of the cylinder
to be rivetted. The cylinder reate upon the lower jaw and is moved forward at
each revolution of the exeentric shaft for a distance equal to the pitch of the rivets
by means of a ratchet or equivalent motion whigh intermittently rotates a drum and
winds on a chain attached to the cylinder or by equivalent suitable means.. At the
front of the upper jaw a slide is moved up and down by an excentric or dam and
ogrries a punch atid a heading tool placed behind each other at a distance equal to
double the pitch, Midway between these a pusher is arranged in the lower jaw
which is moved up and down in a tubular gulde. by a cam or excentric and lever
and rod connections. The guide has an opening on one side through which the
fivets are pushed upon the top of said pusher when the latter is in its lowest i
poaltion by finger, sotuated intermittently by suitable means, the rivets being
supplied from an inclined shoot in which they are placed with their heads down-

page_text: wards. When the pusher has received a rivet, it moves up and inserts the rivet
into the hole punched by the punch at its previous descent, and when the oylinder
is shifted the rivet is carried forward by it under the heading tool which aloses it
at the next stroke, while simultaneously another hole is punched and a fresh rivet
inserted into the hole now between the punch and heading tool.
Dated this 20th day of August 1891
---
K. J. URQUHAKT,
57, Barton Arcade, Manchester...
COMPLETE SPECIFICATION.
Improvements in the Method of and Machinery for Manufacturing
Drying Machine and similar Cylinders,
I, THOMAS LORD, of 28 York Street, Todmorden in the County of York,
Drying Cylinder Maker, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described, and
5 ascertained in and by the following statement:—
.
My invention relates to cylinders for cloth and yarn drying machines and similar
sheet metal cylinders and consiste in an improved method of manufacturing said
eylinders and improved machinery for this purpose. In the method of manufacture
hitherto used, the sheets for forming the cylinders are first bent on bending rolls,
then rivetted together and the cylinder thus formed is planished in a machine by
means of a weighted roller passed longitudinally backward and forward over the
oylinder while the latter is turned for a certain distance after each traverse of the
roller. In.consequence of this method of planishing the orlindrical form is altered,
the cylinder receiving a series of flat surfaces where the roller has passed over it
5 and becoming polygonal, while in consequence of the seams, which cannot be
planished in this way, the whole of the cylinder becomes three cornered and has to
be brought back to a circular form by means of the end rings being forced in and
by being hammered along the seams, whereby a great amount of highly skilled
hand labour is entailed, as all the stretching and buokling bas to be worked out at
the ends, and the seams are sometimes strained in consequence of this stretching.
The object of my invention is to save this skilled hand labour and remedy the pther
disadvantages to a great extent, and I effect this by manufacturing the cylinder no
follows first planish the sheets for the cylinders by passing them oornerwise
through a special planishing machine with a reciprocating roller which passes over
the sheets diagonally or at an angle to their edges, the traverse of the roller being
preferably increased after each traverse au the sheet passes into the machine and
decreased as it emerges from the same as hereinafter described. This planishing
may be repeated at right angles to the first planishing. After the sheet has been
straightened in this way I bend it by means of bending rolls and put the shepts
forming the oylinder together, aftor which I punch and rivet them on a special
punching and rivetting machine constructed as hereinafter described. By planishing
the sheets while in their flat state and in a diagonal direction and then bending
them, the flat surfaces resulting from the old method of planishing them after they
have been bent and rivetted are entirely obviated and a perfectly oylindrical surface
is obtained which does not require subsequent hammering and dressing, while by
rivetting the sheets after they have been thus planished and bent the straining of
the points occurring with the old method by the subsequent working out of buckles
and flat placés is obviated.
The special machine for planishing the sheets diagonally or at an angle to their
edoes is shown on Sheets I and II of the drawings appended hereunto.

page_text: .
The machine consists of two side frames or standards A A¹ connected by a gross
beat or slide B on which carriage C with a vertical slide is traversed by a
screw b. The slide e is suitably guided in the carriage C in guides and carries at
the bottom a roller o mounted in suitable bearings. A lever pivotted to the
parriage Cat and connected by a pin to the slide and weighted by a weight c
presses the roller cupon a cross rail or bed D fixed to the uprights A. A and the
sheet to be planished.
The carriage has a nut attached to its back through which the screw b is
threaded. The sorew is rotated in alternate directions by a crossed and an open
strap being alternately shifted upon the fast pulley from the loose pulleys be by
the strap forks b which are shifted by suitable mechanism at the end of the
traverse of the roller. Towards the end of each traverse a runner o² mounted
on the lever encounters an incline e ore and by running up the same lifts the
slide o and roller off the sheet while the latter is fed forward. The arrangements
thus far described are of a similar kind as those in the machines 'hitherto used for
planishing the cylinders after they are rivetted together.
My improvements for making the machine applicable for planishing the sheets
at an angle to their edges consist in making the inolines ee moveable and in so
arranging them that either of them can be shifted self-actingly and independently
of the other or kept stationary as may be required for adjusting the traverse to
various widths and the varying position of the sheet upon the bed D and in so
arranging the strap shifting motion that it is actuated at the end of each varying
traverse by means of mechanism connected to the inclines, the rollers for feeding
the sheet to be planished forward being also operated by the strap shifting
mechanism.
,
This may be done by arranging said mechanism as follows:-Upon the top of
the cross slide B & bed F is mounted carried by feet the bed being similar to
a lathe bed. Upon this bed F two carriages E E are arranged so that they can
slide on the same and be traversed by means of a guide screw f³, or by equivalent
means. The inclines e eherein before referred to are formed on or attached to the
carriages E E'. These have parts hanging down in front of the bed F containing
recesses in which bushes or shoes GG shewn on an enlarged scale by Figs. 4 and
can alide. The shoes G G¹ embrace the strap shifting rod N on three sides so that
the latter can slide in them, said rod being surrounded by springs h h¹ bearing
against plates at one end and against the shoes G G at the other, the plates i ¹
having openings through which the rod N passes and being fixed to the carriages E El
by screws. The shoes G Gearry pawls g g pirotted to them which are formed
with counter weights to keep them out of gear with the rack formed on the top of
the strap shifting bar N. The carriage C is formed with two inclines or equivalent
striking pallets which come into contact with the counterweights of the pawls at
the same time that the runner o' begins to mount up on the inclines e ore. On
Fig. 1 the carriage C is shewn in the position when, moving to the left, the roller of
encounters the incline and the incline on carriage C encounters the pawl g.
Moving further to the left the incline lifts the counterweight of pawl g and engages
the latter with the teeth of the strap bar N. The further movement of the
carriage C pushes the shoe G and with it the strap bar N to the left against the
pressure of the spring p until the strap in the left fork 6' has passed upon the loose
pulley on the left and the reverse strap in the right fork upon the fast pulley b
whereby the motion of the screw b is reversed, a tumbler weight or its equivalent
not shewn on the drawing being arranged in the usual way when required to com-
plete this movement. Upon the reversal of the screw the earriage C begins to
move to the right, the pawl ġ becomes disengaged from the strap bar N and the
spring hpushes the shoe G out again. The carriage C continues to move to the right
until the pawl g' is encountered by the incline on the other side of the carriage C,
when this pawl is engaged with the strap bar N and pushes the same to the right
and again reverses the screw b similarly as described with reference to the left side
of the carriage. A peg on each shoe & working in a alot of the carriages E E¹

page_text: or equivalent stop limits the projection of the shoes from the carriages E. The
length of the traverse of the carriage C in either direction is thus regulated by the
position of the earriages E E¹ on the bed F,
For the purpose of feeding the sheet to be planished forward over the bed D two
pairs of feed rollers L and L are arranged preferably placed at an angle
46 degrees to the cross slide B in plan as shown by Fig. 2. Each pair is supported
at orie end in a bracket fixed to the standards A. A¹and at the other in a pedestal
mounted on a rat provided with feet and bolted to said standards. The bottom
roller of one pair of food rollers is rotated by the motion of the strap shifting har N
in the following manner: A short rack is formed on or attached to aid bar Nat
the back near to its off end and gears with a pinton on a vertical shaft ¹ carried
in suitable bearings. The shaft n' has a bovil wheel fixed upon its lower end
gearing with two other bevil wheels nn mounted lobas upon the shaft or pivot of
the bottom feed roller L, shown in detail by Figs. 6 and 7, Each of the boril
wheels n³ and nº has a pawl nº¹n pivotted to it engaging into a ratchet wheel
keyed upon the pivot of roller L. As the strap bar N is shifted at the end of the
traverse to the left or right, the pinion n, shaft a¹ and boril wheal n' is turned in
one or the other direction, rotating one of the wheels n' n forward and the other
backward. The wheel turned forward turns the ratchet wheel and therewith the
feed roller forward through the pawl attached to it, while the pawl attached to the
other hevil wheel slips back over the teeth of the ratchet wheel . The feed
roller L is thus turned for a short distance in the same direction at each reversal
af the sorew b. A. chain wheel fixed to the pivot of LA transmits through the
chain the rotary motion to a chain wheel fixed on the bottom roller of the other
pair of feed rollers Lit.
The carriages E E¹ determining the length of traverse of the planishing roller o
in either direction are self-actingly shifted or kept stationary in the following
manner i-The guide screw receives an intermittent short movement for each to
and fro movement of the slide. This is produced by a pawl o pivotted to the end
of the strap bar N, which pawl when the said bar is shifted to the left partly turns
the ratchet wheal o' fixed on a shaft o. The latter carries the bevil wheel of which
gears with the bevil wheel of fixed on the guide sorow and thus the latter is
fuined when the strap bar N is moved to the left. Each of the carriages Ei
fitted with a half nut arranged so that it can be engaged with or disengaged from
the guide sorew in any convenient manner similarly as the half nuts on the garriagos
of sorew cutting lathes are connected with or disconnected from the guide sorew.
For instance the half nuts pp may be arranged to alide vertically in roossses of
the earringen E and E and be actuated by pins working in excentric slots of disca
xed on the shafts yg These shafts carry levers bent or having rods can-
nected to them with bowls as which can rest on the sheet to be planished (see
Figs. 2 and 8). The lever and nut p are no connected that when the bowls rests
an the sheet S to be planished, the half nut pis engaged, with the guide screw ƒ³,
and when the bowl drops off the plate the half nut is lifted out of the sorew. The
other lever and nut para arranged in the reverse way so that the not in dis-
engaged from the sarew when the bawla resta on the sheet S and is brought
into engagement when the bowls' drops off the sheet. The levers may be weighted.
Handles it are arranged on the carriages for rotating small shafts with pinions at
their ends gearing into the threads of the screw for the purpose of shifting the
carriages Eby hand.
The action of these mechanisms is as follows The sheet 8 in passed through
the rollers L' at the back of the machino and pushed forward till the corner resta
on the bed plate D. The earrings E is shifted by means of the handle ♬ sa
that the bowl when placed upon sheet S rests on the same near to its edge
as shown on the drawing. The nut pl is thereby disengaged from the screw
The carriage E is moved by means of the handie's till the bowl is brought slso
near to the edge ♬ª♬ of the sheet and rests on the shoot, the nut p being thereby
engaged with the screw. The holiness and el are thus brought near to enali
E

page_text: at
other. The machine is then started. The carriage and planishing roller
Brat make a very short traverse, soross the corners. At each movement of the
strap bar N to the left the surowƒ³ is turned in the manner hereinbefore described.
The carriage is thereby moved to the left, the carriage E¹ remaining stationary.
The traverse of the carriage C is thus lengthened towards the left at each alternate
reversal of the screw b, the feed rollers advancing the sheet S.at the same time,
while the planishing, roller is lifted off the sheet by the incline e or. When
the sheet has been advanced so far that the part sa has come under the planishing
roller of the bowl drops off the sheet, the lever is turned downwards and the nut p
disengaged from the screws f' The carriage E as well as the carriage I then
remain stationary in the positions shown on the drawings and the traverse of
carriage C the same till the sheet has passed so for forward that the corner`s
comes upon the bed D. The bowl then drops off the sheet, the layer is turned
downwards, and the nut pl engaged with the screw, At each alternate reversal
whpa sorowy ³ is turned, the carriage El is now shifted to the left, and the traverso
shortened correspondingly with the diminishing width of the corner of the sheat
until the corner opmes under the planishing roller.
The machine is then stapped and the carriages E E¹ moved back into the required
positions for starting the next sliegt. The planishing roller passing spross the sheet
compresses and partly stretches the sheet on the line of its passage and hardens the
sheet on this line. By planishing the sheet at an angla to its edges these hardened
lines cross the grain of the metal instead of being parallel to the same and after
the sheets are bent and formed into a cylinder the hardened lines run spirally,
round the cylinder, making the same stiffer and stronger than when plapiched in the
old method.
I do not confine myself to the special arrangements of details of the planishing
machine shown on the drawings and hereinbefore described, but these may be varied
and replaced by équivalent mechanisms. For instance, the guide sorew ƒ³ may be
fixed so as not to revolve and the carriages EE each fitted with a nut threaded
upon the screw and revolvable in bushes of said carriages, the nuts having ratchet
wheels fixed upon them operated by pawli attached to lovers which are lifted by
the lover or projections attached to the same when the lavar o is lifted by the
runner of mounting the inolluese and e', the pawls themselves being lifted out of the
said ratchet wheels or allowed to drop into them by levers arranged similarly to
levers rand and operated by the bowlsa and a resting or dropping off the
sheet S.
"
The machine for panching and rivetting the cylinders after the sheets planished
as hereinbefore described have been bent and clamped together is shown on
Sheet III., Fig. 8, shewing a side view of the machine partly in section; Fig. 9 a
section of the front end of the machine on an enlarged scale and Fig. 10 a section
of the rivet shoot hereafter, referred to. The machine frame U is made similar to
those of ordinary punching machines, with a jaw deep enough to take in half the
length of the cylinders to be rivetted, In the top jaw an excentric shaft 4 is
carried in suitable bearings with an excentric or its equivalent at the front end
which imparts a reciprocating motion to the slide w. The exompris shaft uf is
rotated from the pulleys through apur wheels u . The cylinder V to be
rivetted rests upon the lower jaw and is advanced at each revolution of the
oncentric shaft by means of rope or chains having hooks at ens end hooked
upon the oylinder V and passing over guide rollers to a drum which is rotated
intermittently by a pawl pirotted on the lever o, to which a reciprocating motion
is imparted through the rod from an excentrio fixed upon the end of the
excentric shaft, u. Preferably two ropes or chains are used so as to steady the
gylinder V, and for its further guidance a long groove may be made in the sap of
the lower jaw in which the heads of the bolts used for temporarily cramping the
sheets composing the eylluder together can slide. The slide so carried a punch wi
and a heading tool w the distance of which from centre to pentre is equal to twice
the manh of the riveti.. Mida hetween theed a rivet the fixed in the lewer

page_text: jaw, which tube may be formed in one with the punching die and backing plate as
shewn or otherwise attached to them. In the tube w' a lifter w can move up and
down. This lifter, is raised and lowered as required for the working of the machine
By a bell drank lever, mounted on a shaft or stud in the lower jaw, the vertical
arm of the lever being connected to a rod which passes through a boss on the
machine frame and has a bridle, ², at its outer end surrounding a cam which in
fixed upon a vertical shaft rotated through a pair of mitre wheels from the
excentric shaft u² and so set and shaped that it moves the lifter up and down in
the manner hereinafter set forth. A spring a placed between a collar on the rod
and the frame holds the bridle against the cam The tube is slotted at its
lower end for the bell crank to work in the slot and has an opening at the front
side through which the rivets y are pushed upon the top of the lifter when the latter
is in its lowest position. The rivets are placed with their heads downwards into
shoot y', shewn in section by Fig. 10; which is fixed in the lower jaw uf in any
convenient manner. A bar y slides in the shoot and is pulled inwards by a spring y
or a weight attached to a cord connected to the bar y' and passed over a guidé
pulley.
The action of the machine is as follows: As the slide w descends, the heading
tool to heads the rivet under it and the punch to punches a hole through the two
overlapping sheets.. At the same time the lifter to is pushed up and inserts a rivet
into the hole punched at the previous descent of the slide w and holds the rivet up
while the slide to ascends. The cylinder V is then pulled forward. for a distance
equal to the pitch of the rivete, whereby the rivet inserted by the lifter is brought
forward under the header w and the hole last punched over the tube w*. The
lifter is theu quickly brought back to its lowest position shown on Fig. §, and
the bar y pushes the rivete y forward so that another rivet is placed upon the top
of the lifter w. The play of the parts is then repeated till the half length of the
cylinder has been rivetted, when it is turned round and the other half is rivetted in
the same manner. The mechanisms for producing the motions of the various parts
may be replaced by their equivalents producing the same results.
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:
1. Planishing sheets for drying machine and similar cylinders by a weighted roller
traversed across the same at an angle to the edges of said sheets, substantially as
héreinbefore described,
2. The method of making drying machine and similar sheet metal cylinders by
first planishing the sheets for them by a weighted roller traversed across the same
at an angle to the edges of said sheets, then bending them and cramping them atid
rivetting them together, substantially as hereinbefore described.
3. The general arrangement of a machine for planishing sheets for sheet metal
cylinders substantially as bereinbefore described with reference to Figs. 1 to 7, of
the drawings appended hereunto.
4. In a machine for planishing sheets the arrangement of two pairs of feed
rollers (LL) at an angle in plan view to the direction of the traverse of the
planishing roller (c) and actuated intermittently by means of the strap shifting
bar (N) substantially as hereinbefore described and illustrated.
5. In a machine for planishing sheets by a roller traversed across the same at an
angle to their edges the arrangement of two adjustable carriages (E E¹) with inclines
for lifting the pressing roller and recesses containing springs and sliding shoes (G G¹)
fitted with pawls, a strap shifting bar (N) formed with rack teeth, and inclines on
the planishing roller carriage (C) for engaging the pawls with said rack teeth, or
the equivalents of said parts, for the purpose of regulating and varying the traverse
of the pressing roller by the position of the said adjustable carriages (E E¹)
substantially as herein before described and illustrated on and by the drawings.
6. In a machine for planishing sheets by a roller traversed across the same at an

page_text: angle to their edges fitted with mechanism, for regulating the traverse of the
planishing roller by the position of two adjustable carriages (E E¹) the arrange
ment of mechanisms for self-actingly moving and arresting said carriages controlled
as regards each carriage by a lever carrying a bowl, whose resting on or dropping
off the sheet engages or disengages the said mechanism for moving the carriage,
substantially as hereinbefore described and illustrated on and by the drawings.
7. The general arrangement of a combined self-acting punching and rivetting
machine for drying machine and similar sheet metal cylinders substantially as
hereinhefore described with reference to Figs. 8 to 10, of the drawings appended
hereunto.
8. In a machine for punching and rivetting drying machine and similar sheet
metal cylinders the arrangement of a slide (w) with a punch (w) and heading
tool (w) planed at a distance from centre to centre equal to twice the pitch of the
rivets and a rivet lifter (w) arranged midway between them in the lower jaw,
Baid elide and lifter being actuated so as to work in the manner hereinbefore
described.
R. J. URQUHART,
57, Barton Arcade, Manchester, 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.