Improved Apparatus for Arresting the Motion of Tramway Cars and other Vehicles.
Year: 1889

page_text: Date of Application, 27th July, 1889
Complete Specification Left, 28th Apr., 1890-Accepted, 31st May, 1890
PROVISIONAL SPECIFICATION.
Improved Apparatus for Arresting the Motion of Tramway Cars and
other Vehicles.
We, CECIL HENRY MAXWELL-LYTE, of 60, Finborough Road, London, S.W.
Esquire, GEORGE MILES, Engineer, Metropolitan Fire Brigade Station, Clapham-
Common, and FREDERICK FRANCIS OMMANNEY, Engineer, of 16, Oberstein Road,
New Wandsworth, S.W. do hereby declare the nature of this invention to be as
follows:-
This Invention has for its object to enable the energy of motion of a vehicle to be
directly applied to actuate the brakes for the purpose of arresting the motion of the
vehicle.
The Invention consists in the combination of an air pump or compressor operated
by the wheel or axle of the vehicle and of an air cylinder or equivalent chamber in
which the air compressed by the pump or compressor is allowed to expand and
applied to actuate the brakes through a piston or equivalent device connected, directly
or indirectly, thereto.
The air compressor may either be working idle during the running of the vehicle,
or means may be provided for throwing it into operative gear only when the brakes
are required to be actuated.
Dated wins 27th day of July 1009.
C. H. MAXWELL-LYTE.
G. MILES.
F. F. OMMANNEY.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improved Apparatus for Arresting the Motion of Tramway Cars and
other Vehicles.
We, CECIL HENRY MAXWELL-LYTE, of 60, Finborough Road, London, S.W.,
Esquire, GEORGE MILES, Engineer, Metropolitan Fire Brigade Station, Clapham
Common, and FREDERICK FRANCIS OMMANNEY, Engineer, of 16, Oberstein Road,
New Wandsworth, S.W. 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 has for its object to enable the energy of motion of a vehicle to be
directly applied to actuate the brakes for the purpose of arresting the motion of the
vehicle.
The Invention consists in the combination of an air pump or compressor operated
by the wheel axle of the vehicle and of cylinders or equivalent chambers into which
the air is directly pumped by the compressor when required and wherein the com-
pressed air is applied to act on pistons or equivalent devices connected directly, or
indirectly, to the brakes for the purpose of actuating the same.
car
Reference is to be had to the accompanying drawings, forming part of this speci
fication, wherein we have illustrated a plan view of the running gear of a
provided only with those parts to which the present invention relates.
It should, however, be understood that it may be used in connection with the
starting gear described in the specification of former Letters Patent granted to us
dated the 7th day of August 1888, No. 11416; in which case the arrangement would
be the same as is described and illustrated in the aforesaid specification, the only
ID 1

page_text: alteration needed being the introduction of a back pressure valve between the air-
compressor A and the distributing valve E.
It
In the present example,,A is the air-compressor or pump of the ordinary kind
is supported by horizontal side bars, bearing on the wheel axle D, and by suspension
rods on each side of the air compressor cylinder pendent from the car frame. The
piston of the air-compressor is worked by an eccentric C on the axle D with which
it is coupled or uncoupled, as required, by means of a clutch F worked by suitable
levers and connections from the car platform, as described in the specification of our
previous Patent.
In this case, the air-compressor is thrown into operative gear with the axle only
when the brakes are required to be applied. The discharge pipe a of the compressor
is connected with a pipe g leading to the two brake cylinders G into which the air is
forced by the compressor when in operation and wherein it acts on two oppositely
moving pistons in each cylinder G to the rods of which the brake blocks are respec-
tively coupled, as shewn, the compressed air acting against a spring or springs
suitably arranged by which the brake blocks are withdrawn from the wheels when the
pressure is released.
The connection of the discharge pipe a of the compressor with the brake cylinder
pipo g is through a valve E which is such that the compressed air may either be
admitted to tho brake cylinders or discharged into the atmosphere. The latter is the
case when it is desired to release the brakes or when the compressor works idle during
the running of the car, as would be the case if the clutch F were left in gear or if
the compressor bo operated by a crank instead of an eccentric no clutch being
used. The valve E is worked by similar connections to those described in our previous
specification.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim 1s;-
The herein-described pneumatic brake, consisting in the combination of an air-
compressing pump, worked by the wheel axle, with cylinders or expansible chambers
wherein the compressed air is applied to act on pistons, or their equivalent, connected
to the brake blocks, substantially as specified.
Dated this 20th day of April 1990.
5330
C. H. MAXWELL-LYTE.
G. MILES.
F. F. OMMANNEY.
By A. M. & Wui. Clark,
53, Chancery Lane, London, Patent Agents.