IMPROVEMENTS IN APPARATUS FOR BENDING SHEET METAL AND FOR INSERTING WIRES THEREIN
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
BENDING SHEET METAL AND FOR INSERTING WIRES THEREIN." A communi-
cation from abroad by Brüder Scherb, of Vienna, in the Empire of Austria.
Sealed the 23rd April 1880, and dated the 31st October 1879.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 31st October 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN APPARATUS FOR BENDING SHEET METAL AND FOR INSERTING WIRES
THEREIN." A communication from abroad by Brüder Scherb, of Vienna, in the
Empire of Austria.
The Invention has for its object to roll the edges of metal sheets to any required
diameter, and to insert into metal sheets wires or rods of various diameters.
The improvements consist in holding the whole length of the wire to be inserted
as well as the end of the metal sheet between plane surfaces or jaws instead of
turning the wire, one of these surfaces being formed by a movable tongue which
advances towards the wire from the side, when the latter is clipped by the other
surfaces so that the fixed jaw forms a tangent to the circle of section of the wire
or of the rolled edge,
For commencing the operation the wire and the edge of the sheet are clipped
between a fixed jaw and a movable jaw or sledge, which is pressed against the
fixed jaw by a wedge moved by turning a screw spindle. Between the sledge and
the fixed jaw is a tongue which moves in a line perpendicular or oblique to the
motion of the sledge when pressed by the latter.
The sledge is covered by an angular plate hinged near the wire, and forming a
guide table for the sheet to be inserted, said angle plate being turned up with the
sheet as soon as the end of the latter has been clipped, so as to bend the sheet into
an approximately vertical position, after which the sledge is lowered and the
angular plate with the sheet turned down.
The wire and the end of the sheet which has already been partly rolled over
the wire are then again clipped and the sheet turned up, and this operation repeated
until the end has been rolled over the wire as far as necessary, after which the wire
or rod may be withdrawn. The fixed jaw and the angular plate are attached to a
machine frame or stand which also forms a guide for the movable jaw, and the
whole apparatus may be made of metal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
27th April 1880.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
"IMPROVE-
Patents, of 67, Strand, in the City of Westminster, Civil Engineer.
MENTS IN APPARATUS FOR BENDING SHEET METAL AND FOR INSERTING WIRES
THEREIN. A communication from abroad by Brüder Scherb, of Vienna, in the
Empire of Austria.
"
The Invention has for its object to construct a machine serving the metal worker
for rolling or bending sheet metal to any required diameter, and for inserting into
metal sheets wires or rods of various diameters.
In describing the Invention reference is to be had to the accompanying Drawings,
in which A represents an end view, B a front view, and C a cross section of a
machine embodying the Invention. a is a frame, to the upper part of which is
attached a jaw d, while the lower jaw is susceptible of a parallel motion up and
down by means of a screw spindle and wedges, as shown in the Drawing, or by
any suitable and known device, the jaw being connected with the frame a by
means of the bolts c projecting through slits of the frame. In the machine illus-
trated by the Drawings the two ends of the lower jaw b form hinges for supporting
and serving as fulcrum to an angular front plate or table e provided with a handle.
In other machines, especially such as are intended for operating on long and strong
sheets, the front plate is guided in the direction of the jaw faces and shifted
upward in a dove tailed or other suitable parallel guide. The contiguous edges of
the jaws b and d which lie on the inner face of the frame a are dovetailed, as indi-
cated by the dotted lines x and y, so that the edges can interlace or project over
each other sufficiently to let the front edges of the two jaws touch each other,
whereby the clipping of the thinnest wire is made possible. Between the jaws d
and b is a tongue f, which is always sufficiently pushed forward by the inclined
planes v and w when the lower jaw is pressed upward to provide that a round bar
or wire of any diameter clipped between the jaws touches the plane in which the
outer jaw face is situated.
The sheet to be bent round the bar or wire is placed under the latter, as indicated
by dotted lines in Fig. 1, and then clipped fast with its entire length by the up
motion of the lower jaw b. The front plate or table e is now turned up or raised
so as to place the projecting sheet in the position No. 1 of Fig. 1, the jaw loosened,
the sheet turned back into a horizontal position n, clipped fast, and again turned
up (Fig. 2). The sheet has now obtained the bend No. 2 of Fig. 2, the jaw is again
loosened, the sheet placed in the position n, clipped fast (Fig. 3), and turned up
until the roll is completed, as shown by No. 3 of Fig. 3. In this manner very thin
wires may be rolled into comparatively strong sheets, which is not the case with
the ordinary machines. To obtain a hollow bend the wire or rod may simply be
withdrawn after the bending has been thus completed. The machine can be
constructed for any length and strength of sheet metal, and bends the latter direct
over a rod or wire, which may consist of rolled or drawn metal without any special
preparation. With an oblique position of the jaw d the machine can be applied for
producing conical rolls and tubes.
CLAIMS.

page_text: 3. In machines, for the purposes described, the application of a tongue, which
when clipping fast the rod or wire moves against the latter in such a manner that
for any desired diameter of wire or rod the plane of the jaw s touches the circum-
ference of the wire or rod.
The whole, substantially as and for the purposes described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Twenty sixth day of April, A.D. 1880.
HADDAN
H
LTATYVAN (IS)