Improvements in or relating to Velocipede Brakes.
Year: 1899

page_text: Date of Application, işt døpt., 1088
Complete Specification Left, 1st June, 1900-Accepted, 14th July, 1900
Date of Application, rąɩ dupt., road
Complete Specification Left, 1st June, 1900-Accepted, 14th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Velocipede Brakes.
We, WILLIAM STEVENSON LOUDON, Gentleman, of Spencer Park, Coventry,
Warwickshire and ARTHUR WALTER ADAMS, General Manager, of Stoke, Coventry
aforesaid, do hereby declare the nature of this invention to be as follows:-
-
Our invention relates to velocipede biakes and has for its principal object to
provide a biake action that can be applied to existing hand levers and plunger
jods of ordinary construction and operation and that will preferably be adjustable
so as to act on both the tyre and rim of the wheel or on either of them, as may be
desired Further objects are to provide a rim biake that will act on the sides of
the rim and that will adapt itself to an untiue rim, and cheapness of manufacture
In constructing a brake according to our invention, we press from sheet metal
or otherwise provide four flat strips of approximately S form, the upper ends of
the stips being less curved than the lower ends thereof The stips are used in
pans the upper end of each pair is provided with an oblique slot; and the
lower parts of each pair are set away from each other and then bent parallel so as
to form a fork or bracket The said parallel parts are perforated to carry a bolt
on which is mounted a brake block The said block may consist of leather, rubber
or other suitable material and 18 preferably provided with several sides, so that
when one is worn another may be readily turned into place.
The pans of strips are pivotted on forwardly projecting studs canned on clips
or othei wise attached to the fiont-fork sides The pivot holes for the studs aie
made through the paus of strips a suitable distance above the bifurcations.
We employ a plunger tube or stem of suitable dimensions and to the foot
thereof secure two parallel, vertical, transverse plates, preferably of somewhat
arched elevation The upper ends of the paus of strips pass between the re-
spective ends of the pan of plates A bolt passes though each end of the pair
of plates and at the same time through the oblique alots in the upper ends of the
strips The members of each pan of strips are held together at the top by the
said plates, further down by the nuts screwed on to the pivot studs, and at the
bottom by the bolts carrying the brake blocks The pairs of strips are arranged
with the upper ends directed outwardly and their lower ends directed inwardly
At the foot of the plunger 1od we fit a brake shoe adapted to act on the tyre,
the above mentioned blocks being adapted to act on the sides of the rim The
said shoe may be fixed under the arch, but we prefer to make it adjustable up
and down by mounting it on a separate stem adapted to telescope into the lower
part of the plunger tube and to be fixed therein by a milled nut confined in slots
in the vertical plates, or by a set screw or otherwise
The parts are mounted in position as above indicated, and to apply the brake,
the hand lever is operated in the usual way As the plunger descends the pair
of plates travel with it and the bolts at the ends thereof act on the inclined alots
pushing out the upper ends of the strips and forcing the blocks laterally against or
towards the im At the same time the shoe descends to or towards the tvie, and
the revolution of the wheel is checked by the function set up by the blocks on the

page_text: rim or the shoe on the tyre or by both, according to the relative adjustment of the
parts
If the rim be out of truth sideways, the plunger, vertical plates, and strips will
move laterally to compensate for the irregularity, but we prefer to adjust the parts
so that the bolts do not quite reach the lower ends of the lots when the rim brake
is hard on.
In some cases we dispense with the trie brake shoe
TIT
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DOUGLAS LEECHMAN, M Cy E I.,
Fellow of the Chartered Institute of Patent Agents,
9, Exchange Chambers, New Street, Birmingham,
18, Hertford Street, Coventry, and 75, Chancery Lane, London EC.
Patent Agent for the Applicants,
We, WILLIAM STEVENSON LOUDON, Gentleman, of Spencer Park, Coventry,
Warwickshire and ARTHUR WALTER ADAMS, General Manager, of Stoke. Coventry
aforesaid, 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
-
Our invention relates to velocipede brakes and has for its principal object to
provide a biake action that can be applied to existing hand levels and plunger
iods of ordinary construction and operation and that will preferably be adjustable
so as to act on both the tyie and iim of the wheel or on either of them, as may
be desired Further objects are to provide a um biake that will act on the sides
of the rim, and that will adapt itself to an untrue iim and cheapness of manu-
facture
And in order that our invention may be properly understood we will describe
the same with the aid of the accompanying drawings, wherein
Figure I is a front elevation showing our improved construction of brake in
position
Figure II is a side elevation of the same.
Figure III shows a detail modification.
The same numerals indicate the same or similar parts throughout the drawings
To attain our objects, as shown in Figures I and II, we press from sheet metal
or otherwise provide four flat strips 2 The strips are used in pairs; the upper
end of each pair 18 provided with an oblique slot 3, and the lower parts of each
pair are set away from each other and then bent parallel so as to form a fork or
bracket 4 The said parallel parts are perforated to carry a bolt 5 on which 18
mounted a brake block 6 The said block may consist of leather, rubber or other
suitable material and is preferably provided with several sides as shown, so that
when one is worn another may be readily turned into place
The pairs of strips 2 are pivotted on forwardly projecting studs 7 carried on
clips 8 or otherwise attached to the front forksides 9 The pivot holes 10 for
the studs 7 are made through the pans of strips at a suitable distance above the
bifurcations 4.
We employ a plunger tube or stem 11 of suitable dimensions and to the foot
thereof secure two parallel, vertical, transverse plates 12, preferably of somewhat
arched elevation.

page_text: The upper ends of the pairs of strips 2 pass between the respective ends of the
pair of plates 12. A bolt 13 passes through each end of the pair of plates 12 and
at the same time through the oblique slots 3 in the upper ends of the strips 2.
The members of each pair of strips are held together at the top by the said
plates 12, further down by the nuts 14 screwed on the pivot studs 7, and at the
bottom by the bolts carving the brake blocks 6 The pairs of strips are
arranged with the upper ends directed outwardly and their lower ends directed
inwardly, as shown
At the foot of the plunger rod 11 we fit a brake shoe 15 adapted to act on the
tyre 16, the above mentioned blocks 6 being adapted to act on the sides of the
rim 17 The shoe 15 may be fixed to the plunger 11 below the transverse plates
12, but we prefer to make it detachable, and adjustable up and down, by mounting
it on a separate stem 18 adapted to telescope into the lower part of the plunger
tube and to be fixed therein by a set screw 19 or otherwise
Instead of using pans of strips 2, we may use single strips 2 provided with
sockets 4 or the like to hold the brake blocks 6 as shown in Figure III.
The parts are mounted in position as above indicated, and to apply the brake,
the hand lever is operated in the usual way As the plunger 11 descends, the
plates 12 travel with it and the bolts 13 at the end thereof act on the inclined
slots pushing out the upper ends of the strips 2 and forcing the blocks 6
laterally against or towards the rim 17 At the same time the shoe 15 descends
to or towards the ivre 16, and the revolution of the wheel is checked by the
friction set un by the blocks on the rim or the shoe on the tyre or by both, accord-
ing to the relative adjustment of the parts
If the rim be out of truth sideways the plunger 11. plates 12, and strips 2 will
more laterally to compensate for the irregularity We prefer to adjust the parts
so that the bolts 13 do not quite reach the lower ends of the slots 3 when the rim
brake is hard on
In some cases we dispense with the tyre brake shoe altogether.
Having now particularly descubed and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is-
1 A velocipede brake constructed, arranged and adapted to operate substan-
tially as herein set forth.
2 A velocipede brake which may be adjusted so as to act on both the tyre and
the sides of the rim of the wheel or on either of them and that will adapt itself
to an untrue rim, the same being constructed substantially as herein described
and illustrated
3 In a velocipede brake the combination with the hand lever of, curved strips
having oblique slots in their upper ends, varving um blocks at their lower ends,
and being pivotted on forwardly projecting studs mounted on the front forksides:
a plunger rod transverse plates secured to the plunger rod and carrving bolts
at their outer ends, such bolts engaging in the oblique slots in the curved strips:
with or without a fixed or adjustable tvre brake shoe, substantially as and for the
purpose set forth.
Dated thin lat
DOUGLAS LEECHMAN, M Cv.E I.,
Fellow of the Chartered Institute of Patent Agents,
18, Hertford Street, Coventry,
9, Exchange Chambers, New Street, Birmingham, and
75, Chancery Lane, London, WC
Patent Agent for the Applicants