Improvements in Metallic Mats.
Year: 1890

page_text: Date of Application, 21st Oct., 1890-Accepted, 22nd Nov., 1890
COMPLETE SPECIFICATION.
Improvements in Metallic Mats.
1, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this invention (a communication to me from
abroad by William Chauncey Spelman, of No. 59, East 59th Street, in the City
County and State of New York, United States of America, Manufacturer of Metal
Goods,) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to a new mat made of a continuous corrugated strip of sheet
metal within a continuous outer border, said border being made of hollow U-shaped
metal, meaning U-shaped in cross-section.
The invention consists, first, of a mat having a filling formed of one continuous
strip of corrugated sheet metal, secondly, in combining such filling with a continuous
outer frame, thirdly, in constructing said outer frame of U-shaped cross-section, and,
fourthly, in combining, with said filling and with said outer frame, series of stays or
braces whose ends are reduced where they pierce the outer frame, all as hereinafter
more fully described.
Reference is to be had to the accompanying drawing, forming part of this Speci-
fication, in which Figure 1 represents a top view of the improved mat, and Figure 2
is an enlarged cross-section of part of the same, on line c c Figure 1.
In the accompanying drawing, the letter A represents the filling of the improved
mat, the letter B the outer frame, and the letter C the braces or stays of the mat.
The filling A is a continuous strip of sheet metal beginning at the point a and
terminating at the point b, said strip being corrugated so that the convex parts of the
corrugations in the different rows come in contact with one another, as shewn. By
making this strip of a continuous piece, I am enabled to greatly reduce the expense of
producing the filling for a metallic mat because I can produce the corrugated strip in a
machine by continuous operation and am not obliged to piece several parts together
or to the frame, as was heretofore necessary.
The frame B, it will be perceived from Figure 1, is a continuous frame and embraces
the entire filling which abuts against it, the cross-section of the frame being U-shaped,
as in Figure 2, with the hollow side facing the filling. By this means, I provide a
frame having proper external appearance, furnishing no sharp edge by which external
objects may be injured, having all necessary strength, and furnishing a convenient
abutting edge for contact with the inner filling. The braces or stays C C are rods
which traverse the entire mat, piercing the filling and the frame, said rods being
riveted on the outer side of the frame, as indicated in Figure 2. The ends of the
rods C, where they pierce the frame B, are reduced in thickness, so that shoulders are
thereby formed by which longitudinal displacement of the rods is prevented and the
frame itself securely tied in the desired form.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. A mat, having a filling formed of one continuous strip of corrugated sheet
metal.
2. The combination of the continuous outer frame B with the continuous corrugated
sheet metal filling A, substantially as described.
3. The frame B, made U-shaped in cross section and arranged so that the convex
side of the U shall face outwardly and the concave side inwardly, as specified.

page_text: 4. The combination of the continuous outer frame B with the continuous corrugated
sheet metal filling A and with the stays or braces CC whose ends are reduced in
thickness where they pierce said frame B, as set forth.
Dated this 21st day of October 1890.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.