Year: 1887

page_text: I, ALDIS HENRY MARDEN, of Waltham, County of Middlesex, State of
Massachusetts, one of the United States of America, Mechanic, do hereby declare the
nature of this invention and in what manner the same is to be performed, to he
particularly described and ascertained in and by the following statement :-
My invention relates more especially to the beam of the brake and its immediately
connected parts, and it consists in a novel construction and arrangement of parts,
as hereinafter more fully set forth and described, the object being to produce
a stronger, more durable and effective device of this character than is now in
ordinary use.
In the accompanying drawing
Figure 1 is an enlarged side elevation, one brake-head and a portion only of the
beam being shown.
Figure 2 an enlarged end elevation, the beam and link being shown in vertical
section.
Figure 3 an enlarged side elevation of the clamp represented as attached to the
beam, the latter being shown in vertical section.
Figure 4 an enlarged side elevation of the members of the clamp detached.
Figure 5 an enlarged end view of the members of the clamp detached.
Figure 6 a top plan view of the beam, brake-heads and clamp connected: and,
Figure 7 a perspective view showing one of the notches in the end of the beam.
Like letters and figures of reference indicate corresponding parts in the drawings.
A represents the beam, B, B the brake-heads, and C the lever-clamp.
The heads are designed to be respectively suspended to the truck by links D, and
are provided with shoes and otherwise constructed in the ordinary manner, excepting
as hereinafter set forth.
The bean A, is composed of iron or steel, rolled or pressed into shape, and consists
of a flat web or body m, having a double flange or T-shaped edge fat one side and a
riba at the opposite side, and is so arranged when in position for use that the web, m,
will be in a horizontal or nearly horizontal position, or so that its flange f, will stand
nearly at right angles to the line of strain, as best seen in Figure 2.
7

page_text: The brake-heads B B, are mortised or provided with openings to receive the ends
of the beam, the mortises being so formed and arranged as to leave a portion of the
web m and the rib r projecting from the heads, as shown in figures 1 and 2.
The beam is secured in the following manner.
A notch, corresponding in width with the thickness of the brake-head at that
point where the beam is inserted, is cut in the lower edge of the flange fand the
vertical part of the mortise which receives the flange f, of the beam is made slightly
longer or higher than the height of said flango, so that when the beam is inserted a
portion of the brake-head will enter the noteb, », as the beam drops into position in
the head. A kev 2: is then driven into the mortise in the head above the flange fand
its point bent down, as shown at t, thereby securely locking the beam and head
together in a manner which will be readily obvious without a more explicit
description.
It will, of course, be understood that each end of the beam is provided with a
notch, and that each of the heads is secured to the beam substantially as
described.
The notches may be formed in the upper edge of the flange f, if preferred, in
which case the keys v, will, of course, be inserted below the flange, instead of above it.
The beam A, is curved outward, in the line or direction of the strain, as shown in
Figure 6, the curve, preferably terminating at near each end of the beam in order
that the heads, when attached to the beam, may stand in proper position with respect.
to the wheels of the truck.
The beam may be constructed straight instead of curved, if desired, but I deem a
curved one preferable as it is much stronger, and less liable to bend or spring under a
heavy strain.
The lever-clamp C, is secured to the centre of the beam by the bolts and nuts / h,
as best seen in Figures 1, 3 and 6.
The clamp is composed of two members or halves gk, each of which is provided at
its rear end with a flange i, and at its front end with an arm , said flanges being
provided with holes for receiving the bolt 7, and said arms with holes w for receiving
the bolt h.
The arms, respectively project horizontally from the bodies of the members g k,
and are arranged diagonally thereon and in parallelism with each other, to properly
receive the brake-lever (not shown) which is inserted between them and pivotted
therein by a bolt (not shown) which passes through the holes y, near their outer ends.
The member k, of the clamp is provided with a shoulder or rabbet 14, against which
the lower corner 15 of the body of the member g, rests when the members are joined
and in position on the heam; and the member g, is provided with a shoulder or
rabbet 16, against which the upper corner 17, of the body of the member k rests
when the members are joined and in position on the beam, these shoulders being very
essential to prevent said members from swinging independently on the bolt 1, and
becoming loose.
The member is provided with a deep transverse groove, j, for receiving the lower
edge of the flange and the member 9 with a corresponding groovej for receiving the
upper edge of said flange.
The member k is also provided with a short outwardly projecting lip or flange 24,
on which the lower portion of the inner end of the arm , on the member g rests when
the members are joined, the member g being provided with a corresponding out-
wardly projecting lip or flange 25, which rests on the upper portion of the inner end
of the arm on the member k when the members are joined and in position on
the beam, said lips or flanges acting as braces to strengthen the arms, and keep them
steady.
m, for
In attaching the clamp to the beam a hole is drilled centrally in the web
the reception of the bolt 1, and the members gk, placed on the T-shaped portion of the
beam with their front edges 20 and 21, in contact, and secured by the bolts and
nuts, as hest seen in figure 3.
The object in making the clamp C, in two parts, as described, is to enable it to he

page_text: readily attached to or detached from the beam A, without the necessity of removing
either of the heads, B B, as would have to be done if all the members of the clamp
were integral, and the clamp provided with a mortise or opening for receiving the
T-shaped portion of the beam.
The object of the rib r, is to strengthen the beam and keep the web or body m,
from twisting or warping under a heavy strain. It is preferably made round in cross-
section, but may be made of any other suitable shape.
I do not confine myself to securing the beam in the head by means of the notch r,
and key v, as it may be secured in any other suitable manner. Neither do I confine
myself to the use of the sockets 14 and 16, as one or both may be omitted; nor the
lips or flanges, 24 and 25, in the members kg, as the same may be dispensed with if
desired, although I deem it preferable to employ them; nor to attaching the clamp C,
to the beam by means of the bolts and nuts 1 h, as it may be attached in any other
suitable manner.
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 :-
First. In a car-brake, of the character described and having a metallic beam
connected with a brake-head at each end, a clamp for the brake-lever, said clamp
comprising two separable members and being adapted to be attached to or removed
from the beam without removing either of said heads, substantially as described.
Second. In a car-brake of the character described, the combination of the following
viz. a curved metallic beam; two brake-heads connected with said beam; a clamp for
the brake-lever; and means for securing the clamp on the beam, said clamp com-
prising two separable members and being adapted to be attached to or removed from
the beam without removing either of said heads, substantially as set forth.
Third. The clamp C, composed of the members gk, each of said members being
provided with a flange i, groovej, and diagonally arranged arm, each of said flanges
being provided with a bolt-hole, and each of said arms with holes wy, substantially
as described.
Fourth. In the clamp C, the sockets 14 and 16 substantially as and for the purpose
set forth.
Fifth. In the clamp C, the lips 24 and 25, substantially as and for the purpose
described.
Sixth. In a car-brake of the character described, the clamp C, composed of two
members or halves, beam A, bolts and nuts ih, and heads B B, combined and arranged
substantially as described.
Seventh. In a car-brake substantially such as described, the combination of a
curved metallic beam consisting of a T-shaped bar provided with a strengthening-rib
on the edge opposite the double flange or cross; the brake-heads in which the beam
is secured; a clamp for the brake lever; and bolts and nuts for securing the clamp
to the beam, said clamp comprising two separable members, and being adapted to be
attached to and removed from the beam without removing either of the brake heads,
substantially as set forth.
Datal 201
T
1007
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.