AN IMPROVED CONSTRUCTION OF SHEET METAL CASH BOX
Year: 1885

page_text: I, ALFRED BRATT, of the firm of J. and A. Bratt, of Clarence Street, Wolver-
hampton in the County of Stafford, hardware merchants, do hereby declare the
nature of my invention for, AN IMPROVED CONSTRUCTION OF SHEET METAL CASH
BOX, to be as follows:-
This invention consists in forming the body of a cash box of one piece of sheet
metal in such a manner as to be seamless.
In effecting the purpose of this invention I employ a stamp or press carrying a
die or force suitable for partially forming the inside of the body, and a corre-
sponding exterior die. The sheet metal blank from which to form the body of the
box is laid cold upon the face of the bottom or exterior die, and is then held by
means of a pressure plate so as to prevent the sheet buckling as it is raised by the
pressure or successive blows of the upper die or force.
The partially formed body is next heated, and is then operated upon by finishing
dies carried in the same or a corresponding stamp or press as aforesaid. The
finishing dies are of course shaped to completely finish the interior and exterior of
the previously partially formed body.
The corners and bottom edges of the body of the box are rounded both for
convenience in stamping or pressing out such body and for the sake of appearance.
STEPHEN WATKINS,
Agent for the Applicant.

page_text: COMILELE SLUITIVATION,
An Improved Construction of Sheet Metal Cash Box.
1, ALFRED BRATT, of the firm of J. and A. Bratt, of Clarence Street, Wolver-
hampton in the County of Stafford, hardware merchants, 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, reference
being had to the accompanying drawings and the letters of reference marked
thereon (that is to say) :-
Cash boxes are usually made of thin sheet metal and are, in consequence, built
up in parts.
The object of this invention is to form the body of a cash box of one piece of
sheet metal in such a manner as to be seamless.
In effecting the purpose of this invention I employ a drawing press of the usual
character for raising holloware and having a pressure-plate as is usual with such
description of press. Two pairs of tools or dies are employed, either interchange-
ably in the same press or independently in two distinct presses. One pair of dies
is of such shape as to only partially form the shape of the body between them, and
the other pair of dies is shaped to completely finish the interior and exterior of the
body previously partially formed in the first pair of dies.
The body of a sheet metal cash box constructed according to this invention is
illustrated in longitudinal section by figure 1, in transverse section by figure 2, and
in plan by figure 3, of the drawings herewith. The broken lines, figures 1 and 2,
shew the shape of the partially formed body as it leaves the first pair of dies; and,
according to these broken lines, it will be seen that the sides of the body are drawn
considerably inclined by the first pair of dies and that the bottom is not drawn
down by these dies to quite the depth at which it leaves the finishing dies.
The blank from which the body of a cash box is to be formed is of a greater
thickness than the metal usually employed for cash boxes (preferably not thinner
than N° 18 B. W. G.) and is laid cold upon the bottom die of the first pair of dies,
and is then held by the pressure plate, as will be readily understood, so as to
prevent the sheet buckling as it is raised by the pressure of, or successive blows
from, the upper die or force. The partially formed body is next heated (say to a
bright red heat), and is then placed within the lower die of the second pair of dies,
and held by a pressure plate bearing upon the remaining unraised portion of the
blank. The shape of the body is then completed by the pressure of, or successive
blows from, the upper die or force, and the after removal of the "fin' or surplus
metal by shears, or by turning in a lathe, or by other convenient means.
"
The corners and bottom edges of the body of the box are rounded, both for
convenience in pressing or stamping out such body and for the sake of appearance.
A body constructed in one piece as described is very strong and durable.

page_text: 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
1. The body of a cash box formed of one piece of sheet metal in such a manner
as to be seamless, substantially as herein before described.
2. The body of a cash box formed of one piece of sheet metal by first stamping
or pressing a sheet metal blank in suitable dies operated in combination with a
pressure-plate so as to partially form such body, and afterwards heating such par-
tially formed body and completing the raising thereof in finishing dies operating
in combination with a pressure-plate, substantially as hereinbefore described.
3. A body for a cash box formed in one piece of sheet metal and with rounded
corners and bottom edges, substantially as hereinbefore described and shewn by
the drawing.