Improvements in Cycle Brake-work.
Year: 1898

page_text: Date of Application, 12th May, 1898
20th Cont 1002
Accepted 5th Nov
1898
Improvements in Cycle Brake-work.
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company Limited, of Bournbrook, near the City of Birmingham,
do hereby declare the nature of this invention to be as follows:
-
This invention relates to the brake mechanism of cycles, and has for its object,
to conceal the spring provided for effecting the return movement of the brake
shoe and plunger after the brake has been put on and the lever then released.
The return movement is effected by a spring concealed within a hollow rod or
plunger terminated at the lower end by a fixed shoe whilst the upper end is adjust-
ably and jointedly connected to the brake-operating lever.
In carrying out the invention, I take a hollow brake plunger or rod, arranged in
front of the steering head of a bicycle and passing at its lower end through a fixed
eye directed from or near the crown of the forks, whilst the said lower end, below
the bracket eye, is fitted with a brake shoe of any approved construction. The
other and upper end may be screwed and split downwards at points and takes
over the stalk or rod depending from and box or otherwise jointed to the inner
end of the brake-operating lever, which is hung and fulcrumed to the bracket
or to the handle bar. The said telescoping parts are adjustably affixed together by
a nut or cap taking onto and closing the screwed split end around the stalk or rod.
The hollow or tubular brake rod is longitudinally slotted near its lower part,
through which the shank of a pin or equivalent stop resting or bearing on the
before mentioned guide eye and engaging with a loose block, located within the
said tube, which is capable of sliding thereon, and forming the lower abutment of
a concealed coiled spring, whose upper end impinges against a fixed block disposed
within the interior of and moving with the brake tube. Now as the pin or equiva-
lent stop bears or impinges upon the top side of the bracket or fixed guide eye
where-through the brake rod passes, and when the tube is caused to descend for
putting on the brake, it slides over the block and pin, which remain relatively
stationary, the spring is compressed in consequence of the shortening of the distance
between the two abutments of it.
1000

page_text: •
I, CHARLES THOMAS BROCK SANGSTER, Works Manager to the Cycle Components
Manufacturing Company Limited, of Bournbrook, near the City of Birmingham,
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 the brake mechanism of cycles, and has for its object,
to conceal the spring provided for effecting the return movement of the brake shoe
and plunger when the lever is released after the brake has been applied.
According to this invention, the return movement of the said parts is effected by
a spring concealed within a hollow rod or plunger, terminated at the lower end
by a fixed shoe whilst the upper end is adjustably and jointedly connected to the
brake-operating lever.
..
Figure 1 of the accompanying drawings represents in front elevation, the head
of a bicycle frame fitted with brake mechanism having a concealed spring arranged
in accordance with my invention, and Figure 2 is a side elevation thereof.
Figure 3 is a complete vertical section of Figure 1, showing more clearly the
arrangement of the spring and its abutments.
Figure 4 is another side elevation partly in section of the brake but showing
the brake rod or plunger lowered and the spring compressed.
Figure 5 represents detail parts of the brake, separated.
Figure 6 is an elevation of the back of the plunger with the shank of the guide
eye in section upon the dotted liner, Figure 4.
Figure 7 represents an edge view and a plan of the combined detachable bracket
and guide eye for the brake rod.
The same letters of reference indicate corresponding parts in the several figures
of the drawings.
The improved brake work comprises a hollow plunger a, arranged in front of
the steering head b₁, of a bicycle frame, with its lower end passing through a fixed
guide eye c', directed from the front of a detachable and sectional bracket or
clip c, surrounding the steering column 62, between the front fork crown plates 63,
whilst below the said bracket eye, the said plunger is fitted with a brake shoe <,
which may either be of the form represented in the drawings or of any other
approved construction. The upper end of the said plunger is preferably screwed
at a', and split downwards at points and receives the stalk or rode, depending from
and box or otherwise jointed at e¹, to the inner end f¹, of the brake-operating
lever f, which is hung and fulcrumed to the bracket g¹, on to the handle bar g, or
it may be fulcrumed direct to the said bar. The said telescoping parts a and e, are
adjustably affixed together by a nut or cap 2, taking onto the screwed split end of
the plunger and closing the same around the stalk or rod.
This hollow or tubular plunger rod is longitudinally slotted at a³, near its lower
part, and has passing through it the shank of a pin h, or equivalent stop resting or
bearing on the before mentioned guide eye c¹, and engaging with a loose block 2,
located within the said tube, (which is capable of sliding thereon) and forming the
lower abutment of a concealed coiled spring j, whose upper end impinges against a
fixed cross pink, or other stop, disposed within the interior of, and moving with,
the hollow brake plunger. Now as the stop pin h, bears or impinges upon the top
side of the bracket or fixed guide eye e', wherethrough the brake rod passes, when the
tube is caused to descend for putting on the brake, it slides over the block i, and
pin h, which remain relatively stationary, the spring is compressed in consequence
of the shortening of the distance between its upper and sliding abutment k, and its

page_text: lower and relatively stationary abutment, and is thereby rendered active, so that
when hand pressure upon the brake lever is released, the said spring again expands
and exerts an upward pressure upon the abutment k, and thus restores the parts to
their normal positions.
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 Cycle brake mechanism consisting of a hollow, lever-operated and
suitably-guided plunger, terminated at the lower end in a brake shoe and having
within it, a relatively stationary abutment connected with the framing of the
steering head and a second abutment made fast to and moving with the said
plunger, between which abutments a concealed return-spring is located, sub-
stantially as described and set forth.
Secondly-Cycle brake work consisting of a hollow plunger having within it
a concealed return spring located between relatively fixed and moving abutments,
and with the lower end, which terminates in a brake shoe, sliding through a guide
eye, whilst the upper end is telescoped by an adjustably connected rod jointedly
connected to a brake-operating lever, substantially as described and set forth.
: -
Thirdly In cycle brake work, adjustably connecting the telescoping brake
rod to the hollow plunger, by means of a cap which screws upon the wormed and
split part of the said plunger and contracts the same around the rod, substantially
as herein described and set forth.
.. በነ 1
.
1000
CHARLES THOMAS BROCK SANGSTER,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.