Year: 1888

page_text: Πριονο
I, FRIEDRICH EWERS, of the firm of Ewers & Co., of Waisenhofstr, 12 bis 14,
Lubeck, in the Empire of Germany, Manufacturer, 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 :-
The object of my invention is to provide for seaming sheet metal ware of circular,
oblong, or other shape.
For this purpose
use a peculiar device hereinafter described, which causes the
entire circumference of the metal box or other article to pass the seaming tool so that
the seam will be properly closed thereby.
My said invention comprises various improvements hereinafter set forth.
In the accompanying drawing I have shown how my said invention can be
conveniently and advantageously carried into practice.
Figure 1 is a side elevation showing one forin of my improved apparatus.
Figure 2 is a plan.
Figure 3 is a front elevation.
Figure 4 is a side elevation partly in section showing a portion of the apparatus
drawn to an enlarged scale.
Figure 5 is a plan, also drawn to an enlarged scale, a portion of the frame and
other parts being removed.
Figure 5ª is a vertical longitudinal section, and
Figure 5 is a plan showing a modification of my said invention.
Figure 6 is a vertical longitudinal section, and
Figure 7 a plan showing a further slight modification hereinafter described.
Like letters indicate similar parts throughout the drawing.
A is the frame of the machine, B is the table, C is the article intended to be
closed or seamed.
The seaming-rolls or tools are fastened on a slide which is preferably constructed
in the form of radially movable discs a, upon the circumference of which several

page_text: 7
tools can be fixed that can be brought into action one after another. The said discs a
are attached to the slide rest a¹ by means of a stud a² and a nut a³. The said dises a
are free to revolve upon the said stud a² and may be retained in any required position
by means of a pin upon a lever c pivoted at c to lugs c2 upon the uppermost of the
said disc a.
The pin passes through one or other of suitable holes provided in
the discs a and is adapted to fit in a hole 62 provided in the slide rest a¹. The said
lever c is moreover, provided with a spring e, to retain the pin b in position.
The slide-rest a¹ is fixed on a shaft e provided on one side with a rack f with
which gears a pinion g fixed upon a spindle g¹ carried in suitable bearings in the
frame A. The pinion g can be operated by means of a suitable hand-wheel h fixed
upon the spindle g³, the said hand-wheel is, moreover, provided with teeth 7¹ with
which engages a pawl 2 pivoted at h³ to the frame A. By operating the hand-wheel h,
the slide rest a¹ and the slide a may be moved up or down. A rack i is, moreover,
provided for effecting the adjustment of the slide a to or from its work. The said
rack i is operated by means of a pinion j fixed upon a spindle ¹ carried in suitable
bearings in the frame A and provided with a hand-wheel 2, for the purpose of
traversing the slide a and the seaming rolls or tools to or from the article to be
closed.
Dies and are provided which fit into the recess in the bottom of the article to
be closed. The said dies are, by an arrangement hereinafter described, pressed from
both sides against the article to be seamed so that they form as it were one single
piece which has a turning or lateral motion imparted to by the driving mechanism
that is to say,
The article to be seamed is held between the said dies k, k¹ and has motion imparted
to it from the lower die k which is provided on its lower part, with teeth 7. The said
dies k, are hollow and are of a similar form in cross-section to the shape of the
article to be closed. The outside of the lower die moves in contact with a double-
bent edge-guide m which is screwed upon the table B, the inner sides of both the said
dies k, move in contact with the rollers n and n² respectively. Instead of the
double bent edge-guide m I sometimes employ a guide consisting of an iron bar or
slide m (Figure 5, 5b) fixed to the table B under the pinion u by means of screws
or bolts m² or otherwise a portion of the teeth upon the die k are cut away so as
to permit the said die to bear against the said iron bar or slide m¹. The roller n is
attached to the table B by means of a screw or stud o upon which the said roller n is
free to revolve. The roller n' is attached by a screw or stud o¹ to a disc P hereinafter
described; the rollers n n' touching the inner side of the dies k k¹ respectively afford
a firm resistance against the pressure of the seaming rolls or tools. q is the main
shaft which can be rotated by means of a crank-wheel r, and whereby rotary motion
is imparted by means of bevel or mitre wheels s, s¹ to a vertical shaft or spindle t
carried in suitable bearings t¹. The upper part of the said shaft or spindle t is pro-
vided with a pinion which gears with the teeth upon the lower die k. It will be
seen that the rolls n and n¹ serve as guides on the inner side of the dies k, k¹ and the
pinion u and the double-bent edge-guide m as a guide on the outer side of the said
dies. It is obvious that, as soon as the machine is put into action by operating the
crank-wheel r, the margin of the article fixed in the apparatus in the manner herein-
before described will pass throughout its entire length or circumference a pre-
determined point, viz:-the point where the action of the seaming roll or tool takes
effect upon the said margin.
The dies k, k¹ are rendered true to each other by the table B which is truly planed
and by the disc p the surface of which is turned parallel to it; the latter is fixed to a
vertical shaft or spindle which is provided with teeth v. A pinion w fixed on a
spindle w gears with the said teeth v¹. The spindle w is carried in suitable
bearings w² in a bracket attached to the frame A. The said spindle is, moreover,
provided with a hand-wheel y having teeth y with which engages a pawl y2 pivoted
at y³ to a boss or lug y upon the said bracket a. By means of this device, the
vertical shaft or spindle v and the disc p can be moved up or down and adjusted in
relation to the table B. The vertical spindle or shaft is normally pressed downward
ย

page_text: 2
by a forked lever which carries an adjustable weight 21 kept in the required position
by means of a set-screw z² or other suitable means. The lever z is pivoted at ³ to a
lug upon the bracket and at 2 to a collar v³ upon the vertical shaft or spindle v.
The lever z is raised by means of a rod 26 passing through the hollow pillar and
connected by means of a pin z' with a treadle z pivoted at 2 to the frame A. The
rod is carried in bearings 210, and the pin 2' engages in a slot z" in the treadle z³,
so that, on pressing upon the said treadle, the rod will be moved upward and its
upper extremity will bear against the lever z and raise the latter. The pressure of
the weighted lever is necessary in order to cause the dies k, k¹, to press firmly against
the article to be closed so that the three pieces are kept tightly together, and, more-
over, to guide the said dies and article between the two planes so that the dies are
forced to move steadily in the direction imparted by the circular or sideways pushing
motion.
and 7)
To close the seams of round articles a suitable toothed wheel 212 (Figures
is placed between the pinion u and the teeth 1 formed around the lower die k. The
toothed wheel 12 is secured to the table B by means of a bolt or stud 213 which
upon
the said toothed wheel is free to revolve. In this instance the lower die k is secured
to the table B by means of a bolt or stud 2 upon which the said die k is free to
revolve, or the said die k may be provided with a projection adapted to fit in a
corresponding hole in the table B.
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 1
claim is
First A machine for seaming sheet-metal ware, wherein a toothed die corre-
sponding in shape to the article to be seamed is guided by a spur-wheel, a roller and
an edge-guide, or, in the case of circular articles, by a bolt or stud passing through
the centre of the said die, and wherein the seaming tools are carried by a horizontally
and vertically movable support, substantially as, and for the purposes, set forth.
Second-The improved machine consisting of the parts constructed and combined
substantially as described with reference to Figures 1 to 5 or modified as shown in
Figures 6 and 7 of the accompanying drawing and operating as, and for the purposes,
above specified.
1000