гneumatic Band Brakes for Uyoles, Oarriages, and venicies.
Year: 1896

page_text: гneumatic Band Brakes for Uyoles, Oarriages, and venicies.
I, DELEVANTE WILLIAM CROSLAND of Darnley House Royal Crescent Notting Hill
London do hereby declare the nature of this invention to be as follows:-
The Pneumatic band of brake can be constructed in two separate manners; the
first Method is performed by placing a Pneumatic band around the outside of the brake
drum, while the second Method is performed by placing a Pneumatio band inside a hollow
brake drum:-In the first Method the Pneumatic band of brake consists of a metal casing,
inside of which is fixed a hollow india rubber collar, in such a manner that it can
only be distended inwardly in the direction of the brake drum; upon inflating this
rubber collar with air, the inner circumference will be reduced, until it comes into
contact with the brake drum, which it will thereupon grip round its entire perifery ;
the points of contact being faced with leather to ensure a better grip around the
drum. The Pneumatic pressure being applied through a flexible tube (strong enough
to resist the pressure) jointed at a small hole on the outside of the metal casing, the
other end of the flexible tube being attached to a suitable inflator, furnished with
non-return inlet valve and release valve.
The second method is for use with a hollow brake drum, the pressure being inter-
nal. The Pneumatic brake consists of a metal Disc, on the rim of which is sur-
mounted a hollow rubber ring or tyre, which on being inflated with air will expand
and increase its outer circumference, until it grips the in or under side of the brake
drum internally, a strip of leather being fixed round the rubber at the line of contact
to ensure a perfect grip inside the drum. The pneumatic pressure being applied
through a small bore flexible tube, (strong enough to resist the pressure) jointed at a
small hole at a convenient point under the metal rim in direct connection with the
rubber hollow ring.
I, DELEVANTE WILLIAM CROSLAND of Darnley House, Royal Crescent, Notting Hill,
London, 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:-

page_text: This invention relates to a pneumatic band brake and it consists of certain
combination of parts hereinafter more particularly specified.
In the accompanying drawing which illustrates my invention :-
Figure 1 is a view in side elevation-one half in section-of one form my invention
may assume..
Figure 2 is a view in transverse section through the centre of Figure 1.
Figure 3 is a view in end elevation thereof.
Figures 4, 5 and 6 are similar views showing another form of my invention.
Throughout the views similar parts are marked with like letters of reference.
Referring to Figures 1, 2 and 8. An annular hoop or band A made of rubber or
other suitable elastic material aud adapted to be expanded by being inflated with air
under pressure is mounted in a hollow ring-shaped casing B open on its inner side
and adapted to be fixed to the frame of the machine or vehicle so that it surrounds &
drum such as C mounted on the hub or axle of the wheel to which the brake power
is to be applied. Interposed between the expansible hoop or band and the
periphery of the drum is a band D of leather or other suitable material to take
the wear.
The expansible hoop or band A is connected by a flexible tube such as a with any
suitable form of inflator adapted to be operated by the rider or driver, a suitable non-
return valve and also a deflating or releasing valve being fitted in any suitable
position.
As a modification the brake drum may be arranged to surround the casing B
carrying the expansible hoop or band A as shown by Figures 4, 5 and 6, in which
case the casing is open on its outer side.
Although the wearing or friction band D may consist simply of a band of leather
or other suitable inaterial made fast to the expansible hoop or band A as shown by
Figures 4 and 5, I prefer to employ a metallic band D on which are mounted at
suitable intervals blocks d of leather or other suitable material as shown by Figures
1 and 2. To prevent the band D from moving with respect to the expansible hoop
or band A in this construction the metallic band has projecting pieces adapted to fit
in slots such as b in the sides of the casing B so that while allowing for the expansion
of the band it is prevented from moving circumferentially with respect to the said
casing.
To apply the brake air is forced into the expansible hoop or band A by means of
the inflator whereon the said hoop or band expands in the direction in which it is
not restrained by the casing B and grips the brake drum C through the intervention
of the band D.
It will be seen that with this brake the power can be gathered or accumulated
with great nicety and that the said power is maintained until the air is released from
the expansible hoop or band.
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 :-
(1) A pneumatic band brake for cycles, carriages, and vehicles, substantially as
herein described and illustrated by the accompanying drawing.
(2) A brake for cycles and other road vehicles consisting essentially of a drum
mounted on the axle or wheel to be braked, of a hollow ring-shaped casing either
surrounding, or being surrounded by, the said drum, and of an expansible hoop or
band carried by the hollow ring-shaped casing and adapted to be expanded by being
inflated with air by means of a suitable inflator, as set forth,
(3) A brake for cycles and other road vehicles consisting essentially of a drum
mounted on the axle or wheel to be braked, of a hollow ring-shaped casing either
surrounding, or being surrounded by, the said drum, of an expansible hoop or band
carried by the hollow ring-shaped casing and adapted to be expanded by being

page_text: inflated with air by means of a suitable inflator, and of a hoop or band of leather or
other hard wearing material interposed between the expansible hoop or band and the
breaking drum, as set forth.
Dated this 24th day of May 1897.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer & Patent Agent, 70, Chancery Lane, London, W.C.,
Agent for the Applicant.