Year: 1899

page_text: Date of Application, 2nd May, 1899-Accepted, 15th July, 1899
1, ALFRED LINCOLN STREETER, of 507, Jackson Boulevard, Chicago, in the.
County of Cook and State of Illinois, United States of America, Gentleman, 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 follow-
ing statement;-
-
This invention relates to brake-shoes and relates particularly to the type of
brake-shoe comprising a grooved or channeled flange portion adapted to engage
the flange of a wheel, as in the case of drive wheels of locomotives, and a straight,
Hat portion adapted to engage the tread proper of the wheel, the flat portion of
the triction surface of said shoe being cut away or skeletoned" immediate adja-
cent to said groove or channel so as to reduce the friction surface at this point
and thus equalize the wear on the wheel, due to the action of the rails and of the
shoe, and thus maintain the tread of the wheel practically straight.
Owing to the weakening of shoes of this type, due to the cutting away or
skeletoning thereof, it is necessary in order to secure requisite strength to insure
against breaking of the shoes, when the brakes are applied, that they be made
entirely of steel, which construction is very expensive on account of the high
price of the material of which the shoe is made.
A primary object of the present invention is to provide a skeleton brake-shoe
of this type made of cast iron and reinforced so as to possess requisite strength.
To this end the invention consists in making the body of the shoe of cast iron
and in securing to the back thereof a steel or wrought iron plate, which is cut
away to correspond to the desired skeletoning of the shoe and which extends
laterally over both solid sides thereof and around the flange.
The invention also consists of the various other features, combinations of
features and details of construction hereinafter described and claimed.
In the accompanying drawings a brake-shoc embodying my invention is fully
illustrated.
Fig. 1 is a plan view of the face of the shoe.
Fig. 2 is a side view on the flange side thereof.
Fig. 3 is a plan view of the back thereof; and
Fig. 4 is a sectional view on the line 4-4 of Fig. 1.
Referring now to the drawings, A is the body portion of a brake-shoe embody-
ing my invention, the face or friction surface of which comprises a straight
portion a, which engages..the tread proper, of the wheel and a groove or
channel a¹, formed in the flange of the shoe, which engages the flange of the
wheel.
Formed in said body portion A of said brake-shoe, immediately adjacent to
the groove or channel a¹ are holes or openings a², which extend laterally over
so much of the flat portion a of the friction surface of the shoe as receives the
greatest wear from the action of the rails, thus reducing the wear on this por-

page_text: tion of the wheel tread, due to the action of the brake-shoe, all in a familiar
manner. As shown, also the holes a² extend entirely through the brake-shoe.
The body portion A of my improved brake-shoe is made of cast iron and is
reinforced by means of a strengthening plate A¹ secured to the back thereof,
which preferably forms one integral piece and extends over both the flat por-
tion and around the flange of said shoe and is provided with holes or openings
corresponding to the holes or openings a² in the body, A of said brake-shoe.
The plate A is preferably dovetailed into the back of said brake-shoe, both
around its entire outer edge and also around the edges of the holes or openings
therein. This сан
be conveniently and economically effected by making the
plate A smaller than the lack of said brake-shoe and the holes or openings in
said plate larger than the holes or openings in said shoe, bevelling the edges
of said plate, as shown at a and then casting the body portion of said shoe upon
said plate in such manner that the Back of said plate will be exposed. In order
to more securely lock the bent or curved edge of the plate A' to the flange of the
body of the shoe, I prefer, in addition to
in addition to dovetailing the edge of said plate to
said flange, to provide holes or openings in or adjacent to the outer edge of
the bent portion of said, plate, A, which covers the flange of the shoe, 'said holes
or, openings being preferably outwardly flared and being "interlocked. with
studs, secured in and preferably formed integral with the body portion -A of
the shoe, as they will be naturally, when the body portion of the shoe is-cast
upon the plate A¹. Preferably, also, the holes or openings a "cut out" at the
edge of the plate, A-being, largest back from the edge, thus, not only will the
studs a be-attached-to-the body-of.the.shoe at their ends, but also lengthwise,
on one side, and will operate to dovetail the edge of said plate securely to the
body portion of said shoe on the outside of the flange. Thus, even if the flange
were to break at the bottom of the groove or channel a', said plate A¹ would
operate to maintain it-in. position.
As shown, the brake-shoe. is designed to be attached to the brake-head by
means of a hook a on the upper end of said, brake-shoe and a bolt or stud on
the brake head which engages a hole or opening a in the lower end of said
brake-shoe, all in a familiar. manner....As shown, also the hook a is formed
integral with the strengthening plate. A
با
Among the advantages of a shoe, of my invention may be enumerated its great-
relative strength as compared with shoes made entirely of cast iron, thus render-
ing it possible to wear said. shoes much thinner, than all cast iron shoes, increas-
ing the life of the shoe..and. reducing the quantity of scrap produced when said.
shoe is discarded; the interlocking of the body of the shoe with the flexible
and practically unbreakable strengthening plate; and the great economy in the
cost effected, owing to the cheapness of the material used as compared with steel.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is
1. A brake-shoe comprising a cast iron body portion, a strengthening plate
secured to the back thereof and holes or openings in said shoe, said strengthening
plate extending laterally on both sides of said holes or openings, substantially
as described.
2. A brake-shoe comprising as cast iron body portion, a strengthening plate
and holes or openings, formed in said shoe, said plate extending laterally
on both sides of said openings and the edges. thereof being dovetailed into the
body. portion of said shoe, substantially as described.
3. A flanged brake-shoe comprising a-cast iron body portion, a strengthening
plate of steel or wrought iron secured to the back thereof and holes or openings
in said, shoe adjacent to the flange, thereof,, said, strengthening plate extending
laterally, on both sides of, said holes or openings 'and around the flange of said
shoe, substantially as described.

page_text: 4. A flanged brake-shoe comprising a cast iron body portion, a steel or wrought
iron strengthening plate, holes or openings in said shoe adjacent to the flange
thereof, said strengthening plate extending laterally on both sides of said holes
or openings and around the flange of said shoe, the edges of said plate being
dovetailed into the body of the shoe around their outer edges and also around
the edges of said holes or openings, substantially as described.
5. A flanged brake-shoe comprising a cast iron body portion, a steel or wrought
iron strengthening plate, holes or openings in said shoe adjacent to the flange
thereof, said strengthening plate extending laterally on both sides of said holes
or openings and around the flange of said shoe, holes formed in the flanged
edge of said plate and studs or projections formed integral with the body of
the shoe, which interlock with said holes or openings, substantially as described.
6. A flanged brake-shoe comprising a cast iron body portion, a steel or wrought
iron strengthening plate, holes or openings in said shoe adjacent to the flange
thereof, said plate being dovetailed into the body of the shoe around its entire
edge and also around the edges of the holes or openings in said shoe, holes in
the edge of said plate which extends around the flange of the shoe and which
cut out" at the edge of said plate and studs or projections formed integral
with the body of the shoe, which interlock with said holes or openings in the
edge of said plate, substantially as described.
"6
Dotad this 1st day of Nov 1900
BOULT & WADE,
Agents for the Applicant.