Year: 1886

page_text: I, WILLIAM LLOYD WISE, of N° 46 Lincoln's Inn Fields, in the County of
Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature
of this invention (a communication to me from abroad by John R. Cummings,
of Chicago, Illinois, United States of America, Printer) and in what manner the
same is to be performed, to be particularly described and ascertained in aud by
the following statement:—
My invention relates to an edging and clamping tool, and consists of a tool for
bending the edges of a thin sheet of metal over a suitable base or block and at the
same time. turning and clamping the edges of the metal so bent into suitable
grooves or recesses formed in the base or block.
"
It is especially designed for fastening an electro-shell plate upon a base grooved
or slotted to receive the edges of such a plate and in this connection the invention
will be described and illustrated.
In the accompanying drawings, Figure 1, is a front perspective view of my
invention; Figure 2, a side view in elevation, Figure 3 a central vertical section
on line X X of Figure 2, and Figure 4, an end view of a base and shell showing
the manner in which the edges of the shell are bent and forced into the grooves of
a base or block. Figure 5, is a view of an electro-type shell having flanges to the
bending and clamping of which my improvement is particularly adapted; Figure 6,
is a sectional detail view of a portion of the tool, and Figure 7 a detail.
In the drawings A, is the base of the tool, B an upright central post, Ca
telescopic handle and plunger sliding on said post, and D a coiled spring placed
within the handle C resting upon the post B and confined in place by the top c, of
handle C.
Hinged to the handle on its opposite sides are arms d, d, which carry the bending
and clamping plates E, E.
Connected to these arms by a knee or other joint f, are plates, g. E E, are the
bending or clamping plates rivetted to the plates g¹¹.
The base A has a smooth under face and on its sides is provided with flanges G
slotted to receive the bending plates E, the flanges having their outer corners and
surfaces rounded, and inner faces inclined towards the base. Each slot is divided
by a partition h, rounded to correspond to the corners of flanges G, as shown.
Through these slots pass the bending plates E, each plate being provided with a

page_text: central slot i, to enclose the partition h. The rounded upper surfaces of partitions h
and the corners of the flanges G, form bearings upon which the central portion gl
and the shoulders g¹¹, of the plates g ride when the clamping plates are pressed
down, as hereinafter described.
The bending plates extend below the base and are provided with bevelled
edges l.
In applying this tool to an electro-type shell provided with plain flanges (as
shown in Fig. 5), the shell is placed upon a block having grooves m, running
adjacent to and running parallel with the upper face of the block. The plain even
face of base A is placed over the lettered part of the shell and when force is
applied to the plunger O, the base is pressed upon the lettered face of the shell,
levelling the under surface of the shell with the base block, and at the same time
the lower edges 1, of the bending plates E, are forced towards the block and into
its respective grooves drawing the flanges of the shell tightly against the beads of
the block, setting its flanges into the grooves against the lower sides of the beads,
and thus fastening the shell securely thereto.
The flanges are thus not only turned smoothly and securely within the grooves
but the shell is stretched tightly across the base block, and any buckling or bowing
up of the shell is prevented, and all irregularities of the shell smoothed out.
The pressure upon the plunger C being relieved the force of the spring auto-
matically lifts the bending plates, the tool is moved along the block without lifting
it off, and the operation of bending is repeated.
N
Thus by a rapid succession of strokes upon the plunger by the hand as the tool
is moved along a column of any length of shell is securely clamped upon the base
in a few seconds.
:
When the matter electrotyped on the shell is in the form for printing, arranged
in columns, the tool can be placed over the column for clamping on the shell with
only a slight separation of the columns of the form, thus obviating the annoyance
of taking the furniture out of the form and spreading the columns apart, or of
taking the base block from the form, as would be required were the bending of
the flanges done from the side.
+
This tool will be found useful in connection with a grooved base, whenever it is
desired for any purpose to turn the edges of a sheet of metal inwardly.
Having thus described my invention, what I claim is:
1. A tool for bending the edges of a metal plate consisting in the combination
with the slotted base plate and central post of the handle or plunger, sliding on
said post, a spring, and the bending plates and connecting arms hinged to the
plunger, substantially as, and for the purpose described.
2. In a tool for bending the edges of a metal plate, the plunger, in combination
with bending plates, their supporting plates, and connecting arms hinged thereto,
substantially as and for the purpose set forth.
3. The combination of the base plate provided with the slotted, rounded,, and
inclined flanges G, bevelled projections, and central partition, the bending plates
slotted to fit over said partitions, the hinged connecting arms, the sliding automatic
plunger, to which said plates and arms are secured, the coiled spring and the central
post, substantially as described.