Year: 1885

page_text: I, FRANZ CARL GUILLEAUME, of the firm of Felten & Guilleaume, of Mülheim
on the Rhine, in the empire of Germany, wire manufacturers, 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 :-
Foot mats constructed according to this invention are composed for the most
part of coils of spiral wire arranged parallel to one another; the coils being locked
together laterally either by means of a rod passed through loops formed by over-
lapping portions of the adjoining coils, or by intertwining the several convolutions
of each coil with those of its laterally contiguous coils. The extremities of the
coils referred to, and which I will term "body-coils," are secured to coils arranged
at right angles to the former and which I will term "side-coils." One or both of
these side-coils may be furnished with a bar whereby the mat may be secured in
any position; and in order to afford stiffness to the structure, the side-coils as also
the body-coils or some of them may be threaded with strips of wood or other rods
possessing the requisite regidity,
In the accompanying drawings, Fig. 1 represents in plan a corner portion of a
mat constructed according to this invention and in which overlapping loops of
laterally contiguous body-coils are locked together by means of a rod passing
through the said loops. Fig. 2 is an edge view, and Fig. 3 a transverse section on
the line Y Y (Fig. 1).
Fig. 4 represents in plan a corner portion of a mat constructed according to a
modification in which the several convolutions of each body-coil are intertwined
with those of its laterally contiguous coils, the locking rods employed in the con-
struction previously described being dispensed with. Fig. 5 is an edge view, and
Fig. 6 a transverse section on the line Z Z (Fig. 4).
In Figs. 1, 2 and 3, a are body-coils arranged parallel to one another, the con-
volutions of each overlapping those of its laterally contiguous coil or coils; the
loops formed by such overlapping portions being traversed by rods b which thus
serve to lock each coil to its next neighbour. Inasmuch as the left-hand side of
one coil is engaged with the right-hand side of its neighbouring coil, I prefer to
employ right- and left-hand spirals alternatively for the body-coils; as such a
method of construction enables the several coils to be connected together with
facility and secures a more perfect result. The extremities of the body-coils a are
071

page_text: secured to side-coils, such as c; the ends of the wires. forming the body-coils being
engaged within the convolutions of the side-coils c. One or both of the side-coils o
may be traversed by a bar & adapted for securing the mat in its intended position.
The mat, if fastened by means of only one bar such as d, may be pivotted about
that bar when access for the purpose of sweeping beneath the mat is desired.
Some of the body-coils a are threaded with strips of wood e for the purpose of
affording stiffness to the structure. The side-coils c may with a like object be
furnished with rods e¹.
According to the modified method of construction represented in Figs. 4, 5 and 6,
the convolutions of each body coil a are intertwined with those of its laterally
contiguous coil or coils. In this instance I prefer to employ right-hand spirals or
left-hand spirals throughout for the body coils, instead of employing alternately
right- and left-hand spirals as described with reference to Fig. 1. I also prefer to
employ two spiral wires for each body-coil which thus resembles a double threaded
screw; an increased pitch being preferable where the wires are laterally engaged
by crossing one another as in the present modification. This feature of construction
is not however essential. d is a bar for securing the mat or for serving as a pivot
whereon it may be turned and e, e¹ are stiffening rods as previously described.
It will be perceived that the rod e serves not only to secure the structure against
lateral flexure, but to resist, collapse in the longitudinal direction of the body-coils;
whilst the rods e¹ resist collapse in the longitudinal direction of the side-coils, and
at the same time assist in retaining the rods e in position.
Having thus particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim
1. The improved manufacture of wire-mats composed of spiral coils arranged
parallel to one another, the sides of each coil overlapping the sides of its laterally
contiguous coils and being locked thereto by means of a rod threading the loops
formed by the overlapping portions, substantially as described with reference to
Figs. 1, 2 and 3.
2. The modified method of constructing wire-mats substantially as described
with reference to Figs. 4, 5 and 6 and wherein each coil is locked to its neighbour
by severally entertwining their.convolutions.
3. In a wire-mat composed of spiral coils, the improved means for imparting
rigidity to the structure by lining the coils or some of them with wooden strips or
equivalent stiffening rods, substantially as herein described.
1
T
1100K
G. G. M. HARDINGHAM,
Agent for the Applicant;
191, Fleet Street, London, B.C..