Improvements in the Manufacture of Metallic Fences and similar, Structures.
Year: 1890

page_text: Date of Application, 27th May, 1890-Accepted, 30th Aug.,
1890
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Metallic Fences and similar,
Structures.
We, WILLIAM LIVINGSTONE, of Flushing, Queen's County Long Island, State of
New York, U.S.A. Mechanical Engineer, and JOHN COOPER, of, 57 Convent Avenue
n. the City, County and State of New York, U.S.A. Manufacturer, do hereby declare
the nature of this. invention and in what manner, the same is to be performed, to he
particularly described, and ascertained in and by the following statement:-.
Our invention relates to improvements in the manufacture, of, metallic, fences, and
similar, structures, and has for its object to produce a fence, made in, sections, of
single pieces of sheet metal, stamped, drawn and formed to produce the desired
configuration.
With this end in view our invention consists in certain steps in the process of
producing a fence from sheet metal and in the product produced by such method.
In the accompanying drawings,
Figure 1 is a view of a sheet metal blank of which a section. of the fence is to
be made.
Figure 2 is a view of the same after it has been cut and slotted.
Figure 3 is a view of a complete section of fence.
:
Figure 4 represents a section of fence formed, from a blank cut and slotted the same
as shown in Figure 2, but with different forming dies.
Figures 5, 6, 7 and 8 are views illustrating modifications.
3
In carrying my invention into effect, a suitable machine will be provided, with
cutting and slotting dies and the sheet metal blank, figure 1, subjected thereto."
It is obvious that the cutting dies, by means of which the picket heads are produced,
may be of a form to produce any desired design, and that the dies which produce the
slots that are afterwards opened to produce ornamentations in the body of the fence,
may be differently arranged as may suit the fancy of the manufacturer to effect
different designs, but for convenience of illustration reference will be first bad to the
form or design illustrated in figures 2 and 3.
The sheet metal blank A is inserted into the machine and the cutting dies operate
upon it to produce, the picket beads B.
Simultaneously with this operation, or by a separate operation of the machine, the
slotting dies are brought down upon the blank and slots 1, 2, 3; produced. The slots 1
are located centrally between the picket heads and starting from' the base of said heads
terminates at points just above the centre of the blank. The slots 2 beginning at points
just below the horizontal centre of the blank, and in the same vertical plane with the
slots 1, extend to the lower edge of the blank.
The slots 3 (Figure 2) begin at points near the base of the heads of the pickets and
extend to points somewhat above the lower edge of the blank.
The blank thus cut and slotted is next drawn out, the slots 1, 2 and 3 being opened
to produce openings 4, 5, and 6. When the blank is thus drawn out the structure
will have assumed irregular form at certain places as the metal is apt to pucker more
or less at the ends of the opening 6 and to correct this and make the structure perfectly
flat and regular, it is subjected to a series of forming dies, which, entering the
spaces 4, 5, 6, force the metal into symmetrical forms, and all irregularities in the
metal pressed out by the forming dies.
The forms of the invention shown in figures 5 and 6 are similar to that above
described, except that slots 1 and 2 are made shorter, and forming or finishing dies
of different form are used for completing the structure.
Still another form is shown in figures 7 and 8, this variation being produced by
varying the lengths and positions of the slots-thus it will be seen that numerous
0

page_text: designs may be produced by simply varying the lengths and positions of the slots and
employing forming or finishing dies of varying forms.
In such forms of fence as illustrated in figures 6 and 8 and in many other forms
which might be devised where comparatively wide spaces of metal, as 7, figures 6
and 8, are left, such spaces are provided with depressions 8 by means of suitable dies,
such depressions serving to strengthen the structure as well as to add to its ornamental
appearance.
These depressions 8 may be made semi-circular in cross section, or of any other
desired form, and where it is desired to produce a structure of more than usual
stability two sections of fence such as shown in figure 8, may be secured together, in
which case the concave or semi-circular depressions of one section of the fence will
register with those of the other section and produce, in effect, a round hollow bar.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The herein described process of making sheet metal fencing, consisting in first
cutting the blank to produce picket heads, and slotting the body of the blank next
drawing out the blank thus cut and slotted and then subjecting the structure to
forming or. finishing dies, substantially as set forth.
2. The herein described process of making sheet metal fencing, consisting in first
cutting the blank to produce picket heads, second producing slots in the body of the
blank, third drawing out the blank thus cut and slotted and fourth subjecting the
structure to forming or finishing dies, substantially as set forth.
3. The herein described process of making sheet metal fencing, consisting in first
cutting the blank to produce picket heads, and producing slots in the body of the
blank, then producing depressions in the material of the structure, drawing out the
blank thus cut and slotted, and finally subjecting the structure to forming and finishing
.dies, substantially as set forth.
4. A sheet metal blank from which a section of fence is to be made, said blank
being cut at its top to produce picket heads, and having in its body a series of slots
adapted to produce open spaces when the blank shall have been drawn out, substantially
as set forth.
Dated thi. 0741
1000
F. W. BARKER,
Applicants' Agent.