Year: 1888

page_text: Date of Application, 27th Jan., 1888
Complete Specification Left, 27th July, 1888
Complete Specification Accepted, 31st Aug., 1888
I, WILLIAM JOB HOWCROFT, of 24 Alpine Road, Rotherhithe, London, S.E.,
Iron Plate Worker do hereby declare the nature of this invention to be as follows:-
:-
My invention consists of improvements in riveted buckets made of sheet metal and
in the apparatus and machinery employed in the manufacture of such improved riveted
buckets.
I stamp out the body of the bucket in two piecos from a sheet of the desired
material, the width of each half being a little greater than is necessary in the methods
of making metal buckets now employed. The cutting edges of this stamping die aro
movable and adjustable so as to suit any desired shape or size of bucket. Also the
body die can be removed and a circular cutting die attached to this part of the machine
for stamping out the bottom at one blow. The two halves of the body of the bucket
are fitted into each other by folding over the vertical edges of each and ongaging one
within the other on a machine which is no part of my invention. In the bucket the
two vertical seams have therefore three layers of metal and are stronger and less
liable to leakage than those now made. The body of the bucket is then transferred
to a cone or cylinder fixed on and revolving with à mandril. Another cone inverted
relatively to the other is brought up to the first cone by the action of a treadle or
other appliance. The body of the bucket is shaped between the two cones or cylinders.
The top and bottom edges of the bucket are treated in the manner described in my
invention for which application was made for a patent on the 14th day of December
A.D. 1887, and numbered 17219. The bottom is also secured to the body of the
bucket in the way there described. The bucket is then removed and placed on another
cone or suitable support where a row of rivet holes is punched through each scam,
cach row of holes being made by one action of the puncher. The bucket is then
placed on another support over a row of rivets suitably arranged in a slide. A stop

page_text: on the support allows the bucket to be easily placed so that the rivets at once enter all
the prepared holes in one seam. This stop is so made as to be easily moved to allow
the bucket to be pushed against another stop, which movement of the bucket
takes the row of rivets from the slide and brings them directly under the action of a
stamper which at one blow forms all the rivet beads and secures the scam.
All the parts of the machine here described, except that employed in engaging the
two halves of the body of the bucket, can be driven from one shaft with suitable
gearing, the stamping and punching machinery and other parts for which constant
action is not required being thrown in and out of gear by any suitable method.
A single pair of shaping cones or cylinders may be employed or any number of
pairs of the same or of different sizes in one machine.
121 az
1
J
1000

page_text: the Manufacture of the same.
1, WILLIAM JOB HOWOROFT, of 24 Alpine Road, Rotherhithe, London, S.E., Iron
plate worker 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 consists of improvements in riveted buckets made of sheet metal and
in the apparatus employed for the purpose, which apparatus is also in part suitable to
be employed in the manufacture of other articles.
The body of the bucket is stamped out from a sheet of the desired material the
width of the stamped-out piece being a little greater than is necessary in the methods
of making riveted buckets now employed.
Fig. 1. is a front view of the stainping or cutting apparatus.
Fig. 2 is a plan of the lower dic and framo.
Fig. 3 is a side view of part of the apparatus employed in moving the
upper
die.
The apparatus is here shown with the lower curved piece S out of reach of the action
of the revolving pin Z.
Fig. 4 is a front view of same with treadle Q down.
A is frame of machine. B is the support of the lower die and bolted on to A.
D, D are side pieces carrying two opposite cutting edges of the lower die. The
distance between D D can be adjusted by screws F, and they are fixed in any desired
position to B by nuts and bolts E. The transverse edges G of the lower die are moved
by screws E which act on runners G₁ to which G, G, are attached. They are fixed
to B in any desired position by nuts and bolts J. The lateral edges G of the lower
die can be taken out and others of suitable size put in, but the edges suffice for any
desired shape and size. The top cutting dio K is composed of segments which can
be replaced by others so as to correspond with the lower die; or the die K. may be in
one piece and removable. The die K is secured to a shaft I the upper part of which
moves in a box M. The top of the shaft L carries a curved piece N concave as
seen from below. Below this is an axle O passing through the hollow shaft L and
working up and down in slot P. This axle is capable of partial revolution which is
effected by treadle Q and lever action as shown. The axle O also carries a curved
piece S within the hollow shaft L. This curved piece S when the axle O is turned is
brought under N and is concave as seen from above. A wheel T which receivos
motion by strap U from wheel V on main driving axle W carries an axle ending in
a plate or arm Y carrying a pin Z placed eccentrically within the box M. When the
treadle is pressed down the pin Z revolving alternately presses down the die K by
acting on the curved piece S and elevates it by acting on N. When the treadle is up
a spring K attached to lever R aids in causing the axle O to turn and bring forward
the curved piece S out of the range of action of Z. One side of the box M tapers so
that the piece N and hollow shaft L are held fast when clevated until the action of

page_text: pin Z on piece S forcos it down. Any other suitable contrivance may however be
employed for holding up the die K, as for instance friction bolts adjusted from the
outside and acting on the surface of the hollow shaft L, or the shaft L' may work in a
groove or grooves narrowing upwards.
When it is desired to stamp out the bottoms of vessels the said dies and supports B
and D are removed.
Fig. 5 shows a general front view of stamping apparatus with dies in position for
stamping out the bottoms of vessels.
Fig. 6 is a section of the lower and the upper parts of such dies.
The support A is inserted in the frame into the cavity of which it fits resting upon
screws B by means of which the clevation of lower die F¹ is adjusted. Upon A¹ is
placed a plate C carrying in lugs D¹ three or more screws E for holding in position
the lower die F. The dies may be of any desired shape or size, those shown in Fig. 6
stamp out bottoms folded at the edges. The upper die G₁ is attached to shaft L by
clamps, screws, bolts, or other suitable contrivance.
Fig. 7 shows a form of lower die H' suitable for cutting flat bottoms. The slot J¹
allows the bottom when cut to be easily removed.
The vertical edges of the body of the vessel are engaged with each other by folding
over so that the seam has four layers of metal as shown at Fig. 11.
On the frame AI may place one or more machines for shaping the vessels, closing
the joints and fixing on the bottom. These are substantially the same as that
described in my Specification No. 6964 dated the 24th May 1886 and entitled
Improved machine for manufacturing sheet metal buckets and similar sheet metal
receptacles." I will therefore only describe my improvements on the apparatus
therein shown.
Fig. 8 is a front view of one shaping apparatus showing rollers in pairs and an
additional mandril for turning over the lower edge of bucket body.
This form of apparatus is adapted for buckets of stout metal. The upper mandril K¹
is brought by hand against the bottom edge of the bucket body on mandril I. A
spring Οι or other contrivance draws back the mandril K' when not in use. As the
bucket body revolves the pressure of the mandril K' causes the bottom edge to turn
over outwards. The pairs of rollers serve to give a better finish to the joints. The
roller M is first used as shown in Specification No. 6964 of the year 1886 already
referred to and then the roller N', which is furnished with a finer groove or has an
ungrooved surface finishes the joint.
Figs. 9 and 10 show improved forms of rear or counter mandrils adapted for
different classes of buckets.
Figs 9 and 10 show the class of vessels made by the respective mandrils.
Fig. 12 is a front view showing an additional rest for rollers.
This is employed when the mandril is of a very tapering form so that the rollers
may get near their work. The rollers are taken off the upright frame A and the
rest is fixed therein. The rollers are then secured in the slot R¹ of rest Q'.
Fig. 13 shows an improved form of rest. In this case the piece with the slot R' is
pivoted at S and is fixed at the desired angle by nut and bolt T.
Fig. 14 is a general side view showing the riveting part of the apparatus. This is
placed at the end of the machine remote from the cutting out part.
Fig. 15 is an enlarged view of the apparatus employed in punching rivet holes
in vessel.
Fig. 16 is an enlarged view of apparatus employed in fixing rivets.
Fig. 17 is a plan of slide or plate for holding rivets.
Fig. 18 is section of plate showing beviled edges of rivet holding holes.
Fig. 18 is an enlarged section of part of plate.
The vessel is taken from the shaping apparatus and placed with its seam upon the
projecting lip U which is furnished with orifices VI. The desired position of the
vessel is obtained by pushing it against a stop W. The movement of the puncher X
is produced in the way described for moving the cutting die K. A slide or
plate Y¹
containing rivets is pushed into the grooved projecting lip Z. The holes Aч in plate

page_text: have beriled edges. The plate Y¹ is pushed home with the pin E" against the ond of
lip Zand the vessel is placed on Z so that the rivets in plate Y enter the punched
holes. A stop B is provided to indicate the proper position for the vessel. By
means of a lever C worked by hand a slide D beneath lip Z is pushed against
the pin E. By this movement the rivets are withdrawn from the beviled holes A"
and rest on the flat surface of Y¹. The stamp F" is then brought down in the way
already described and the rivets are thus fixed in the vessel.
All the parts of the apparatus hore described except those expressly mentioned as
moved by hand can be driven from tho one main driving shaft W by suitable gearing.
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 use and manufacture of a machine for making sheet metal buckets and
similar articles consisting of stamping and riveting apparatus as described in the
foregoing specification in combination with a machine for shaping the body and
securing the joints and bottom.
2nd. In a machine for making sheet metal buckets and similar articles tho use and
manufacture of the stamping process and dies described in the foregoing specification
and shown in Figs. 1.-7.
3rd. In a machine for making sheet metal buckets and similar articles the use and
manufacture of an upper mandril for folding over the edge of vessels as described and
shown in Fig. S.
4th. In a machine for making sheet metal buckets and similar articles the use and
manufacture of rests for rollers as described and shown in Figs. 12 and 13.
5th. In a machine for making sheet metal buckets and similar articles the use and
manufacture of pairs of rollers for finishing the top and bottom joints as described and
shown in Fig. 8 with one of the rollers ungrooved.
6th. In a machine for shaping sheet metal buckets and similar articles the use and
manufacture of tho mandrils shown in Figs. 9 and 10 for the purposes specified.
7th. In a machine for riveting sheet metal buckets and similar articles the use and
manufacture of the punching apparatus described and partly shown in Fig. 15.
8th. In a machine for riveting sheet metal buckets and similar articles the use and
manufacture of the stamping apparatus described and shown in Figs. 16-18.
9th. the use and manufacture of the plate Y¹ for holding rivets for the purpose
specified.
10th. The riveted bucket or similar sheet metal article with the scam composed
of three or four layers as made by the apparatus described in the foregoing
specification.