Improvements in Screens and Gratings.
Year: 1888

page_text: Date of Application, 3rd Mar., 1888
Specification Accepted, 6th Apr., 1888
Improvements in Screens and Gratings.
We, JOHN BURKHARDT, Machinist, and WILLIAM HENRY JACKSON, Manufacturer,
both of 31 East Seventeenth Street in the City and State of New York, United
States of America, 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 :—
In the drawings forming part of this specification Figure 1 represents a transverse
central section of a sphereoidal body or globe through which four holes are shown
around its center at equal distances apart.
Figure 2 represents the same with a piece of wire or rod inserted through it at two
of the holes therein.
Figure 3 represents a sunken bed or die plate the concavity of which corresponds
in size and shape with one half of the dimensions of the globe and wire represented
in Figure 2 taken longitudinally thereof.
Figure 4 represents a central longitudinal vertical section of the die-plate shown
in Figure 3 with its counterpart with the globe and wire shown in Figure 2 placed
between them in position to be acted upon by the operation of the dies and a tool to
be used with them.
Figure 5 represents the wire or rod shown in Figure 2 in the form conferred to it
by the action of the tool referred to, after it is inserted through the globe and has
been removed from the dies; it also shows a transverse section of a transverse wire
or rod within the globe occupying the position as in a finished screen.
This invention consists in a method of forming wire screens and similar articles
and in the production of a screen composed of a series of straight wires or rods a
series of transverse bent wires or rods and hollow perforated bodies or covers each of
which includes a single joint or intersection of a straight and a bent wire at the bend
thereof as herein more fully described.
In the drawings A denotes the hollow sphereoidal joint cover. B denotes one of
the wires or rods which for the purpose of definiteness of description may be termed
one of the longitudinal series or kind. C, a transverse sectional view of one of the
wires which may be denominated as of the vertical kind or series.
The rods B and C, cross each other within the globular or other shaped cover A
and to allow them to pass across each other within the small dimensions of the joint
ID 1

page_text: covers A, in the openings of which they closely fit and to occupy the same plane in
the screen when finished one of the series of parallel rods or wires is bent laterally
as shown in Figure 5.
The bending is done while they are within their respective joint covers A and
held between the die plates D, E, a hole a, being formed through the upper plate D
through which a suitable blunt tool can be inserted and pass through one of the
holes 2", of cover A to receive a stroke of a hammer or the action of a press. And
when the rods or wire B and its joint cover A. are removed from the die plates the
cover A is turned on its axis the one fourth of a revolution whereby the bent portion
of the wire is removed from the direct line of passage of the transverse wires or
rods C that they may pass through the covers A as shown in Figure 5.
An equivalent method of forming the joints or intersections of the wires or rods
within the joint covers would be attained by making slots or chisel cuts longitudinally
of the wires B, through them, before inserting them through the joint covers A and
the slots could be opened by a tapering tool inserted at right angles to said wire
through one of the holes in the cover A and the transverse wire would then be
inserted through the joint cover and the opening in the wire B. The slots would be
made in the wire B at such regular distances apart as would be necessary to form a
screen of any particular mesh. This modification of our invention may be carried
out without the use of the bed or die-plate above described.
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;
-
First. The above described method of forming wire screens and similar articles,
which consists in inserting the longitudinal wires through a hollow perforated body
or joint cover, then producing a bend or opening of said wire within the interior of
said joint cover, and then passing the transverse wire through other perforations
of the joint cover and through the bend or opening of the longitudinal wire therein,
as set forth.
Second. The wire screen consisting of a series of straight wires or rods and a
transverse series of bent or perforated wires or rods in combination with the joint
covers A each of which covers includes a single joint or intersection of the longitudinal
and the transverse wires substantially as and for the purpose set forth.
Dated the 3rd day of March 1888.
HERBERT J. ALLISON,
Agent for the Applicants.