Improvements in the Manufacture of Stair Treads, Flooring, and other similar Wearing Surfaces.
Year: 1887

page_text: Date of Application, 6th June, 1887
Complete Left, 6th Mar., 1888
Complete Accepted, 20th Apr., 1888
Improvements in the Manufacture of Stair Treads, Flooring, and
other similar Wearing Surfaces.
1, WILLIAM DUNSMORE BOHM, of 23 Old Jewry, in the city of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the manufacture of stair treads, flooring
for entrance halls, and like purposes, the improvements being also applicable to the
manufacture of foot brake levers and other articles requiring a hard wearing surface
and the invention mainly consists. in providing the wearing surfaces of stair treads
and other wearing surfaces with emery as hereinafter more particularly described.
In carrying out my invention I find it advantageous to manufacture the stair
treads &c. from paper pulp and I introduce into the paper pulp in the course of
manufacture when compressing it into blocks or slabs a suitable number of small
pieces of broken emery whereby they shall be embedded or partly embedded in the
outside or wearing surface of each block or slab when pressed and toughened by the
ordinary process of manufacture thereby forming what I term mineralized blocks or
slabs.
The blocks or slabs may be made with a hollow core into which a screw may be
inserted for the purposes of fixing either to existing wooden stair treads or otherwise
or they may be adapted to fit into a frame of suitable patterns by means of bars so
arranged that the base of each block shall be made slightly larger than and tapering
up to its wearing surface, and passed through the orifices or receptacles in the frame
so that the frame; being, smaller shall press against the blocks on being fixed or
screwed to the stairway.
In place of paper pulp I sometimes employ blocks of wood, leather, or other
suitable fibrous material:-
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: I, WILLIAM DUNSMORE BOHM, of 23, Old Jewry, in the City of London,
Engineer, 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 :-
This invention relates to improvements in the manufacture of stair treads, horse-
shoes, flooring for entrance halls, and other articles or surfaces subjected to great
friction or wear, and the said invention mainly consists in providing such articles or
surfaces with emery as hereinafter more particularly described.
In applying my invention to stair treads or the like I employ paper-pulp into
which introduce in the course of manufacture, when compressing into blocks or
slabs, a suitable number of small pieces of broken emery in such a manner that they
shall be embedded or partly embedded in the outside or wearing surface of each
block or slab when pressed and toughened by the ordinary process of manufacture
thereby forming what I term mineralized blocks or slabs.
Instead of compressing the pieces of emery into the wearing surfaces, the same
may be introduced into and secured in holes previously formed in such surfaces.
The blocks or slabs may be made with a hollow core into which a screw may be
inserted for enabling them to be fixed either to existing wooden stair treads or in any
other position, or they may be adapted to fit into a frame divided into receptacles of
various shapes by means of bars the blocks or slabs being so arranged that the base
of each block shall be made slightly larger than and tapering up to its wearing
surface, in order to pass through the orifices or receptacles in the frame so that the
divisions of the frame, being smaller than the bases of the blocks, will press against
the blocks on the frame being fixed or screwed to the stairway.
It will be obvious that the improvements are especially applicable for the wearing
surfaces of horseshoes for which the improved blocks or slabs are admirably adapted
as they are practically unwearable.
In place of paper pulp I sometimes employ blocks of wood, leather, or other
suitable fibrous material.
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 improvement in the manufacture of stair treads, horseshoes, flooring, and

page_text: other articles or surfaces liable to wear consisting in the compression or insertion
into such articles or surfaces of pieces of emery, substantially as and for the purpose
specified.
2. Stair treads, horeshoes, flooring or other articles or surfaces liable to wear
composed of paper-pulp, wood, leather or other fibrous material, having pieces of
emery embedded therein, substantially as and for the purpose specified.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
Dated the 6th day of March 1888.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.