Year: 1897

page_text: Date of Application, Foth June, 1897
Complete Specification Left, 15th Mar., 1898-Accepted, 15th June, 1898
Date of Application, roth June, 1097
Complete Specification Left, 15th Mar., 1898-Accepted, 15th June, 1898
GEORGE WALTER Mallet, 246, Portland Road, South Norwood, London, S.E.,
Ship Broker, do hereby declare the nature of this invention to be as follows:-
A straight, or concave roller made of wood, metal or other material having an
axle passing through its centre and rotating in attached frame on ball or other
bearings.
At either end of roller are grooves encircling same so as to admit of rings made
of rubber or other material and when pressed will rotate on and with wheel and
gradually apply its brake power over a maximum of circumferential area without
injury or strain to tyre or wheel.
GEO. W. MALLET,
GEORGE WALTER MALLET, 246, Portland Road, South Norwood, London, S.E.,
Ship Broker, 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:
A straight or concave roller made of wood metal or other material having an
axle passing through its centre and rotating in attached frame on ball or other
bearings, at either end of roller are grooves encircling same so as to admit of rings
made of rubber or other material, or roller may be moulded or turned with such
rings so that when pressed it will rotate on and with wheel and gradually apply
its brake power over a maximum of the circumferential area without injury or
strain to tyre or wheel. In the drawing of the brake Fig. and on such scale the
diameter of the rings B is 12 inches whilst that of the roller at the point C is
only 3/4 inch and the distance between the rings at the point marked D is 1 inch.
Now supposing that the brake is fitted to the front wheel of a machine whose
diameter is 30 inches on the first application of the brake the rings would come
into contact with the tyre on its edges and the roller which is mounted on a spindle
would commence to roll at a speed due to the velocity of the tyre, at the point of
contact, thus it would touch at say 29½ inches diameter, the circumference of
which is 922 inches whilst the circumference of the roller rings would be 43/4 inches.
It will thus be seen that whilst the tyre is making one revolution the roller would
be revolving at a speed 19 times faster, on the further application of the brake

page_text: the full diameter of the tyre would come into contact with the roller at the point C,
the circumference of these respective diameters would be 94% and 2½ inches
and the relative speeds 1 to 40, it will be seen that on the same roller there will
be two speeds one of 19% on the rings and one of 40 at the point C, but as these
cannot take place at the same time a skid or braking action is produced and a
retarding effect brought on the tyre. To produce or assist in a further braking
power or friction washers of leather or other material may be placed at ends of
axle inside spindle and the same tightened by screw nuts at axle ends as may be
desired. The brake is easily mounted, on the front wheel it takes the place of
the ordinary spoon brake whilst on the back wheel it is placed below the back hori-
zontal stays, and connected by rods to the front brake gear, Fig. 2.
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:-
The new or improved brake for cycles and the like as and for the purpose herein
set forth.
Dated the Fifteenth day of U.
1000