Method of and Apparatus for Producing Perforated Accumulator- Plates.
Year: 1897

page_text: Date of Application, 13th Dec., 1897-Accepted, 28th Jan., 1898
COMPLETE SPECIFICATION.
Method of and Apparatus for Producing Perforated Accumulator-
Plates.
I, MORICZ ENGL, of Vienna, Austria, I, Belariastrasse, 4, Electrician, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
-
Accumulator-plates are generally produced from an active mass spread on or
pressed in frames or grids of lead. The frames or grids serve as supports and
conductors of the mass and are made in different forms.
On the accompanying drawings are illustrated two forms of grids.
Figures 1 and 4 are elevations Figures 2 and 5 are cross sections and Figures 3
and 6 are longitudinal sections of the same; for securing the mass the one con-
struction is provided with grooved ribs (Figures 4 to 6); whereas the other one
(Figures 1 to 3) has ribs provided with prongs.
I will mainly describe the second form, as here the alternating prongs on both
sides of the plate hold the mass like thumbs and prevent the falling off; at the
same time they secure the conducting-contact. To augment the capacity and
efficiency of the plate it is necessary to provide the same with a surface as great
as possible, which is obtained by perforating the mass.
The perforation was very difficult, as there were no suitable devices for it.
The present invention has for its object to provide a process of and a device
for pressing and perforating the plates at the same time, whereas hitherto the
plates were first pressed and then perforated.
The improved process consists in placing the frames or grids to be filled with
active mass between two matrices or dies which are formed according to the
configuration of the side of the frame on which they are to act, whereupon the mass
to be pressed in is introduced into the free spaces and is exposed to a pressure
between two pressure-plates (constructed according to the configuration of the spaces)
of which the lower one is provided with perforating-pins, and the upper one with
corresponding openings or recesses, so that the material is pressed into the frames
around the perforating-pins, the pressing being thus effected at the same time as
the perforation. The pins are then removed from the plate so that, after the
removal of the upper die or matrix the finished pressed and perforated plate can
be removed.
For effecting the above described process I employ a suitable pressing-device,
llustrated in Figure 7 in longitudinal section, in Figure 8 in plan view, and in
Figure 9 in cross-section, and which may be employed in combination with an
ordinary press, a hydraulic press, or an elbow lever press the matrix being formed
ccording to the special pronged grid-form required, but it may be constructed
ccording to any other form of grid.
As will be seen in the drawing, the pressing-device consists of two main parts,
amely a lower part and an upper part.
The lower part consists of an external casing a of cast-iron, the inner surfaces
of which are formed as guiding-surfaces. This casing is secured upon a base--

page_text: plate b, which is provided on the underside with a prismatic guide 61, adapted to
fit into a support-bath 2 in the pressing-plate 63. This prism is provided with
a stop device to enable the apparatus always to be adjusted in the pressing-axis.
Fitted in the guide casing a is a guiding-frame c, which is tooled both inside
and outside. Upon the upper edges of this frame is secured a level plate d, upon
which are fixed pieces e e e .. formed according to the inner spaces of the
lead-frame in such manner that the remaining intervals between the plates
correspond exactly to the ribs and prongs of the lower side of the grid.
In the pieces e, e
are provided openings e¹ el …, similar in arrange
ment and form to the intended perforations. Corresponding with these openings
are provided openings in the bottom-plate d, but somewhat larger in every
direction.
еее...
The guiding-frame c has besides four openings c² (Figure 9) two on each longi-
tudinal side, by which it is supported upon four cams f, of which each two opposite
ones are mounted upon a common shaft g I- These shafts g extend on one side
through a vertical slot a¹ of the frame a and carry 'worm-wheels g¹, actuated by
two worms, mounted upon a common shaft g³; one of the worms is provided
with a right hand thread; the other one with a left hand thread; the worm wheel
shaft g³ may be actuated simply by a hand wheel.
By actuating these worms the two cams are rotated simultaneously, either
in an upward or a downward direction. Into the guiding-frame c is also fitted
a strong supporting-plate strong enough to prevent a bending through of the
plate during the pressing operation effected upon the filling-mass.
h
Below, this plate is provided with extensions h¹h on the longitudinal sides,
which contain bearings, by means of which the plate is mounted upon the cam-
shafts 9.
Upon this plate is removably mounted a second plate i, in which are secured
the perforating pins facing the openings in the pieces e, e, e,
in such a
manner that they cannot be shifted by the opposing forces.
By turning the cams the pins with supporting plate h are raised so high, that
the ends are level with the surface of the loose filling-mass, or, on the other hand,
they are depressed so that the ends do not project beyond the plate-pieces e, e, e,..
these movements being effected on turning the cam shaft, by the cams sliding
upon the slide surface e¹ and thus effecting a raising or depressing of the shaft g
together with plate h.
These parts concern the underside of the accumulator-frames.
For the upper side only one upper part is necessary formed according to the
upper outlines of the plate-openings. This is a complete set of plate-pieces
el el e¹ as for the lower side, also fixed upon a stronger plate d¹, and both
together secured to the press head p.
These pieces e', el, el, are also provided with openings e e e corresponding with
the ends of the perforating-pins 1, but not extending into the plate d. The latter
is provided behind the pin-openings with longitudinal channels k, in which the
particles of the mass carried along by the pins may be collected and whence they
can be pushed away by means of a wire.
In this manner the pins can be made to enter into the plate pieces, without
obstructing the openings whereby further work might be hindered.
A main feature of the device is the matrices or dies, which have the object
not only to, determine the extent of pressing and to effect an equal filling, but also
to simplify and facilitate the work.
e, e, e, .
These matrices or dies, which are shewn at Figures 10, 11 and 12, are grid-like
frames of iron or metal, fitting with their openings exactly upon the plate-pieces
and with their ribs exactly into the interstices between the plate-pieces.
The lower die or matrix lies upon two flat-springs o (Figures and 15) which
are secured upon the plate d; by these springs the lower die is raised about the
half thickness of the plate over the surface of the plate pieces, around which the
mass is pressed.

page_text: A reinforcement or ring m³ serves for strengthening the die m and for the exact
adjustment of the lead-frames.
The device is used as follows:-
r
At first the cams f. are turned in such a manner that the fixing pinsa may
he put in and the guiding-frame c can be adjusted (position, Figure 13). Then
the cams are turned about 180° until the plate h. with perforating pins 7 has
attained its highest position (Figure 14). The lower die m is now put in, and
then the lead frame which is to be filled with mass, and hereupon the upper die
or matrix m! is fitted on. Hereupon the bolts s, sliding in grooves s¹ on the upper
casing-edge, are moved forward by a suitable mechanism, (described further on),
the matrices being somewhat depressed to facilitate the forward motion of the
sliding-bolt. The matrices are thus secured in their position (Figure 14). The
mass is now filled in, and is then levelled off to the ends of the pins, and the
device is then pushed into the press by means of the prismatic guide until it is
arrested by a stopping device of any known construction, so that the apparatus is
situated in the middle. The press-head p, which is fixed in the press platen exactly in
the middle and corresponding with the plate-pieces el el el
with the upper
matrix or die and with the lead frame. In order to obtain an exact coincidence
of the perforating-pins with the openings e² in the press-head, the latter is pro-
vided with conical guiding-pins & Figures 7 and 9 corresponding with openings q
Figure 8 at the corners of the casing a, and having a length corresponding exactly
to the distance to which the pins are to penetrate. The press is now actuated
(Figure 15) and after a short time the press is disengaged, by turning back the
cams the pins are moved back, also the sliding-bolts ss, are withdrawn, and the
finished plate is taken away, whereupon the device is drawn back from the press
and may be charged again."
The device for actuating the sliding bolts is as follows:-
The sliding bolts & Figure 8 sliding in grooves s¹ on the two longitudinal sides
of the frame a, have each an oblique slot with which slot engages a pint of a
bart sliding along the frame.
The two bars which are guided straight are connected on the left hand side of
the frame by a traverse or cross-bar, provided with a handle ¹ and carrying at
the same time.the sliding-bolts appertaining to this side.
The opposite end of one of these bars or rods t is hinged to a double ended lever
w the second end of which we acts upon the sliding bolts s of that side. By this
means I am enabled to actuate by a single pull or pressure on the handle r' all
the sliding-bolts at the same time, so that by one pull all sliding-bolts are moved
back and the plates and matrices are released, while by a pressure upon the handle
the forward or closing motion of all sliding-bolts s is ejected.
Instead of constructing the press only for frames with four openings for the
filling-mass as shewn, the same may vary in size and number of openings without
departing from the nature of my invention.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. A method of simultaneously pressing and perforating accumulator-plates
consisting in putting the frames or grids to be filled with mass between two
matrices or dies, which are formed to correspond with the adjoining side of the
frame, whereupon the the mass is filled in the free spaces and is subjected to pressure
between two corresponding pressing plates through which pass perforating pins
whereby the material is pressed into the frame around the perforating pins, so that
the plates are simultaneously pressed and perforated, whereupon the pins are drawn
back, and the finished perforated plate is taken out after removal of the upper
die or matrix substantially as described.
2. For carrying out the method of operating described in Claim 1, an apparatus
characterized by two pressing-plates & aud d' provided with plate-pieces e e e .

page_text: corresponding with the form of the frame openings, two matrices or dies m and m¹
to be placed between the pressing-plates, which dies hold the lead-frames and
are formed corresponding to the configuration thereof, and plate hi moving up
and down independently of the pressing-motion with perforating-pins which
pass through the lower pressing-plate d and enter into the upper one d', and thus
produce perforations in the mass during the pressing-operation, substantially as
described.
3. In the pressing and perforating apparatus for accumulator-plates, described
in the first and second claims, a device for drawing back the perforating-pins from
the pressed plates, characterized by a plate hi carrying the pins 77 and supported
by a shaft g with cams f f and guided in vertical slots, so that by turning the
shaft by means of worms g² g² and worm wheels g g or by any other suitable
gearing a simultaneous raising or depressing of plate hi and perforating pins
is effected, so that the pins are brought into their normal position without
injuring the mass, substantially as described.
4. In the pressing and perforating device, described in the second claim, a
device for fixing the matrices m and m¹ with the interposed frame or grid, r,
consisting of sliding-bolts ss, which are journalled upon the frame a enclosing
the said parts, and which bolts are guided in slots for moving them to or from the
matrices, substantially as described.
5. A device for moving simultaneously the sliding-bolts described in the fourth
claim characterized by two bars tt, connected by means of oblique slots 2 2 and
pins to the sliding-bolts, which bars by their longitudinal displacement effect
the motion of the corresponding sliding-bolts by means of the oblique slots, a
cross-barv, connecting the two bars & t and acting directly upon the sliding-bolts s
of the adjoining side, and a double-armed lever w, arranged along the fourth side
and actuated from one of the two longitudinal bars t, which said lever w is con-
nected to and actuates the sliding-bolts on the same side, substantially as
described.
Dated this 18th day of Dacomba 1807