Year: 1895

page_text: Date of Application, 1st Apr., 1895
Complete Specification Left. 20th June, 1395-Accepted, 29th June, 1895
A communication from JOSEPH HARCOURT PARKINSON, of Roxborough Street,
City of Toronto, Province of Ontario, Dominion of Canada, Gentleman.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be
as follows:-
This invention relates to certain new and useful improvements in brake shoes,
and the object of the invention is to provide a brake shoe with sufficient soft metál
to properly grip the running face of the wheel when the brakes are applied, and
also to provide a brake shoe with sufficient chilled metal to prevent tlie rapid
cutting away or wearing of the shoe by the running face of the wheel, and to 'so
arrange the shoe that it will true up the running face of the wheel, and that that
portion of the shoe near the flange of the wheel will be entirely soft metal, in order
that the shoe will not wear the tread or running surface of the wheel and will not
cut into the flange; and the invention consists of arranging in the shoe a series of
chills of a substantially triangular form, the bases of which are located along what
will normally be the outer edge of the shoe with the apex of each triangle"
extending a little beyond the middle of the shoe, leaving a body of soft metal
along the inner edge of each shoe.
The shoe is of the usual size and shape and consists of a series of chilled and
soft metal parts preferably formed integrally with each other. Each of the chilled
parts is of substantially a triangular shape with its base along what will normally
be the outer edge of the shoe, and its apex extending slightly across the middle of
the shoe. The chilled metal parts are preferably four in number, arranged equi-,
distant from each other with their bases located along the outer edge of the shoe.
Between each of the chilled metal parts along the outer edge of the shoe is a
narrow strip of chilled metal. Between the chilled metal parts and the chilled
metal strip and the opposite or inner edge of the shoe are the soft metal parts. By
constructing the shoe with the chilled metal parts arranged substantially in
triangular form with soft metal between them, the edges of the chills will be at an'
angle to the rotation of the wheel, offering substantially no cutting surface to the
rim of the wheel. By arranging the shoe in this manner, the chilled metal parts
can, under no circumstances come in contact with the Hange of the wheel, thus
avoiding the possibility of, the shoe cutting into the flange. Also by arranging the
shoe in this manner; there will be little or no chilled metal on the tread of the
wheel, as the chilled metal parts come in contact with the outer edge of the rim
of the wheel and have a tendency to true up the rim of the wheel between' the
outer edge and tread.
1
The apex of the triangles may be slightly rounded, instead of coming to a sharp
point. A shoe constructed on this principle will give the best results both for wear
and for frictional grip on the rim of the wheel.
Dated this 25th day of April 1895.
BOULT & WADE,
Agents for the Applicant.
A

page_text: A communication from JOSEPH HARCOURT PARKINSON, of, Roxborough Street,
Toronte, Province of Ontario, Canada, Gentleman.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, 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 certain new and useful improvements in brake shoes
and the object of the invention is to provide a brake shoe with sufficient soft metal
to properly grip the running face of the wheel when the brakes are applied, and
also to provide a brake shoe with sufficient chilled metal to prevent the rapid
cutting away or wearing of the shoe by the running face of the wheel and to so
arrange the shoe that it will true up the running face of the wheel, and that that
portion of the shoe near the flange of the wheel will be entirely soft metal, in
order that the shoe will not wear the tread or running surface of the wheel and
will not cut into the flange; and the invention consists of arranging in the shoe a
series of chills of a substantially triangular form, the bases of which are located
along what will normally be the outer edge of the shoe with the apex of each
triangle extending a little beyond the middle of the shoe leaving: a body of soft
metal along the inner edge of each shoe the whole device being constructed as
hereinafter more fully set forth and more particularly pointed out in the claims.
In the drawings..
Figure 1 is a perspective view of one of the brake shoes showing the arrangement
of the soft metal parts and the chilled metal parts.
Figure 2 is a perspective view of a similar shoe showing a modified shape of the
chilled metal parts.
Like letters of reference refer to like parts throughout the Specification and
drawings.
The shoe A is of the usual size and shape and consists of a series of chilled
parts a and soft metal parts a' respectively preferably formed integrally with each
other. Each of the chilled parts a is of substantially a triangular shape with its.
base B along what will normally be the outer edge of the shoe and its apex b
extending slightly across the middle of the shoe. The chilled metal parts a are
preferably four in number arranged equidistant from each other with their bases B
located along the outer edge of the shoe A. Between each of the chilled metal
parts a along the outer edge of the shoe is a narrow strip C of chilled metal.
Between the chilled metal parts a and the chilled metal strip C and the opposite or
inner edge of the shoe A are the soft metal parts a'. By constructing the shoe
with the chilled metal parts a arranged substantially in a triangular form with soft
metal between them the edges of the chills will be at an angle to the rotation of
the wheel, offering substantially no cutting surface to the rim of the wheel. By
arranging the shoe in this manner the chilled metal parts can under no circum-
stances come in contact with the flange of the wheel thus avoiding the possibility
of the shoe cutting into the flange. Also by arranging the shoe in this manner
there will be little or no chilled metal on the tread of the wheel as the chilled
metal parts come in contact with the outer edge of the rim of the wheel and have a
tendency to true up the rim of the wheel between the outer edge and tread.
In Figure 2 the apex of the triangle is shown to be slightly rounded, instead of
coming to a sharp point as shown in Figure 1. With the exception of the rounding
of the apex there is no difference whatever in the construction of the shoes shown

page_text: in Figures 1 and 2. A shoe constructed on this principle will give the best results
both for wear and for frictional grip on the rim of the wheel.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed I declare that what I claim is ;-
1. A brake shoe consisting of a series of chilled metal parts of substantially a
triangular form having their bases located along one edge of the shoe with the
apex of the triangle extending across the middle of the shoe and soft metal
between the chilled metal parts and the sides and ends of the shoe substantially as
specified.
2. A brake shoe consisting of a series of chilled metal parts of substantially a
triangular form having their bases located along one edge of the shoe with the
apex of the triangle rounded and extending across the middle of the shoe and soft
metal between the chilled metal parts and the sides and ends of the shoe
substantially as specified.
3. A brake shoe consisting of a series of chilled metal parts of substantially a
triangular form having their bases located along one edge of the shoe with the
apex of the triangle extending across the middle of the shoe a chilled metal strip
connecting together the bases of the chilled metal parts along the same edge of
the shoe as the bases and soft metal between the chilled metal parts and the side
and ends of the shoe substantially as specified.
4. A brake shoe substantially as and for the purpose described and illustrated in
the accompanying drawings.
Dated this 20th do- of Lun 1805
BOULT & WADE,
Agents for the Applicant.

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