Improvements in or connected with Pneumatic Cycle Brakes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Cycle Brakes.
I, JOHN ERNEST LEATHERBARROW, of 33, Worthington Street, Old Trafford,
Manchester, in the County of Lancaster, Engineer, do hereby declare the nature
of this invention to be as follows:-
My said invention relates to improvements in or connected with pneumatic
cycle brakes, and refers to an improved method of mounting, securing and
adjusting such brakes.
In carrying my invention into effect I provide one of the back stays of a
bicycle, preferably at a point near the bottom bracket and in advance of the
rear wheel, with a pendent clip bracket. The brake shoe is formed or provided
with a snug or angle plate into which slots of suitable length are cut, and the.
brake shoe is bolted to the pendent bracket by bolts passing through the slots
formed in the snug. By means of the slots formed in the snug the brake shoe
may be conveniently adjusted so as to bring the brake surface into its proper
relative position with regard to the tyre of the rear wheel of the bicycle. By
thus mounting the brake below the centre of the wheel instead of above I am
enabled to readily overcome the difficulties presented by the mudguards when
using brakes of this type on the back wheel of a bicycle.
Improvements in or connected with Pneumatic Cycle Brakes.
I, JOHN ERNEST LEATHERBARROW, of 33, Worthington Street, Old Trafford,
Manchester, in the County of Lancaster, Engineer, do hereby declare the nature
of this invention and in what manner the same is to be performed to be particu-
larly described and ascertained in and by the following statement and accompany-
ing drawings:-
My said invention relates to improvements in or connected with pneumatic
cycle brakes and refers to an improved method of mounting, securing and
adjusting such brakes.
In carrying my invention into effect I form the back of the brake shoe with an
angle plate provided with slots, and a pendent clip bracket secured to one of the
back stays of the bicycle near the bottom bracket carries. suitable bolts engaging
with the slots in the angle plate by means of which the brake shoe is secured to

page_text: °
the bracket. By means of the slots in the angle plate of the brake shoe, the
brake shoe may be conveniently adjusted so as to bring the brake surface to its
proper relative position with regard to the tyre of the rear wheel of the bicycle.
The accompanying sheet of drawings more clearly illustrates my invention.
Fig. 1 is a side view of my improved attachment.
Fig. 2 is also a side view looking from the back of Fig. 1.
Fig 3 is an end elevation, these figs. being drawn to a scale of about full
size.
Fig. 4 is a view on a smaller scale showing my improved attachment applied
to a bicycle.
The attachment consists of a pendent bracket a curved outwards at the top in
a half circle or other suitable curve. A separate clip piece a¹ also suitably curved
out is provided and one of the back stays of the bicycle is embraced and gripped
between the bracket a and auxiliary piece a¹. Suitable bolts c and nuts d are
provided for the ready attachment and removal of the bracket a. The brake
shoe e is provided at one side with an angle plate f which is formed with slots g g.
Bolts and nuts h¹ h¹ secure the brake shoe to the bracket a.
In applying my improved attachment, which is devised to bring the brake sur-
face to bear upon the back wheel, the bracket a is secured to one of the back
stays b of the bicycle near the bottom bracket i as shown in Fig. 4.
This is readily effected by removing the auxiliary piece a¹ and then bolting the
whole to the tubing as will be understood. To obtain final adjustment of the
braking surface the nuts h¹¹ are slackened when the slots g permit the brake
shoe to be adjusted as required.
It will be noted from an inspection of Fig. 3 that the angle plate f being dis-
posed on one side of the brake shoe e when the attachment is secured to the back
stay the brake shoe is carried between the back stays so as to be in perfect
alignment with the tyre j of the back wheel.
The attachment is preferably made of aluminium for the sake of lightness and
its untarnishable properties. The auxiliary clip piece a¹ instead of being loose
as shown may be hinged at its upper portion to the bracket a. Further if desired
the bracket may be formed of tempered steel suitably curved to embrace the
stay and instead of being bolted to the stay may be sprung upon it. The air
tube is secured to the brake shoe e in the usual manner.
'
By means of my improved attachment the brake is applied to the wheel at the
most suitable point, and as will be noted from an inspection of Fig. 4 can be-
applied without interfering in any way with the mud guard I.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
The improved attachment for pneumatic brakes consisting of the pendent
bracket secured to one of the back stays near the bottom bracket, and the slotted
angle plate formed on the brake shoe, whereby the brake can be readily secured
and adjusted in the manner and substantially as described and illustrated in the
drawings.