Improved Machiue for Working Bends or Angles in Sheet Metal.
Year: 1896

page_text: Date of Application, 26th Oct., 1896
Complete Specification Left, 26th July, 1897-Accepted, 28th Aug., 1897
Improved Machiue for Working Bends or Angles in Sheet Metal.
I, WILHELM PFROMMER, of Karlsruhe, in the Grand Duchy of Baden, Germany,
Master Locksınith, do hereby declare the nature of this invention to be as
follows:-
This improved machine, shown in seven figures in the accompanying drawing, has
for its object the setting of the clamp-cheek or jaw (b), which is requisite for the firm
holding of the sheet of metal being worked, at any time at such a height against the
stationary hinder bearing (c) relative to the pressing surface of the pressing body or
press-cheek (d), that provision is made for all cases of the different thicknesses. of
sheet-metal, and thereupon a right-angled bend of metal sheets can be produced without
further handling.
The method by which this is accomplished is that the clamp-cheek (b) is not
pressed vertically against the firmly held sheets of metal but inclined to the same at
an angle of forty-five degrees.
For this purpose the clamp-cheek (b) possesses on both sides guiding blocks or
guiders (b) and (b)--one only of which is seen in the drawing-which run in slit-
shaped niches (A, and A) of both the side frames (A, and A,), and can be shifted as
may be desired by means of screw spindles (h, and h₁) whose nuts (₁₁ and ) are
inserted in the frames (A, and A,) at (A) Figure 2 and there fixed.
This shifting of the clamp-cheek (6) can also be easily effected if both the
spindles ( and h₂) are rotated together by a common driving shaft by means of bevel
wheels in the usual way.
DL: CAL
1100e
COMPLETE SPECIFICATION.
Improved Machine for Working Bends or Angles in Sheet Metal.
I, WILHELM PFROMMER of Karlsruhe in the Grand Duchy of Baden, Germany,
Master Locksmith 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 :-
This improved machine, shown in seven figures in the drawing filed with my
Provisional Specification, has for its object the setting of the clamp-cheek (b) or jaw,
which is requisite for the firm holding of the sheet of metal being treated, through a
simple screw movement or pressure contrivance on both sides, at any time at such a
height against the stationary hinder bearing (c) relative to the pressing surface of the
pressing body or press-cheek (d), that provision is made for all cases of the different

page_text: thicknesses of sheet-metal, and thereupon a right-angled bend of metal sheets can be
produced without further handling, provided the spindles (h, and h₂) to be found in
the frames on both sides are duly operated. The method by which the sheet of metal
to be treated is simultaneously held or stretched tight and set in place according to
its thickness is that the clamp-cheek (b) is not pressed vertically against the firmly
held sheets of metal but inclined to the same at an angle of forty-five (45) degrees,
the grooved edge of (b) in an equal degree approaching to or receding from the pivot
centre (f) of (d.) For this purpose the clamp-cheek (b) possesses on both sides
guiding blocks or guiders (b) and (b)-one only of which is seen in the drawing-
which run in slit-shaped niches (A, and A) of both the side frames (A, and A.), and
can be shifted as may be desired by means of screw spindles (h, and h₂), whose
nuts (, and i) are inserted in the frames (A₁) and (A) at (As) Figure 2 and there
fixed.
This shifting of the clamp-cheek (b) can also be easily effected if both the
spindles (h, and h₂) are rotated together by a common driving shaft by means of
bevel wheels in the usual way.
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:
An Improved Machine for working bends or angles in sheet-metal, its specially
distinguishing features being that the movable clamp-cheek (b) is set at an angle of
forty-five (45) degrees against the fixed clamp-cheek (c) and the sheet of metal to be
-treated, with the object of making possible a sharp right-angled bending of sheet-
metal of various thicknesses.
2007