TH ДСС отаке тот отсустев али ще
Year: 1897

page_text: Date of Application, 15th Mar., 1897-Accepted, 17th Aor., 1897
TH ДСС отаке тот отсустев али ще пко.
1, WILLIAM HUMPHREY WHEATLEY, of the Firm of Wheatley and Mackenzie,
of 40 Chancery Lane, in the County of London Engineers and Patent Agents,
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:-
The object of my invention is to supply a wheel brake adapted for use in
bicycles and the like, and by which great power and speed of action are obtainable
without injury to the bicycle or the like, or disadvantage to a rider, on said bicycle
or the like.
On referring to the drawings attached, illustrations of my invention will
be seen.
Figure 1 is a diagram showing a side elevation of part of a bicycle containing
the said brake with the brake in closed position or
on ";
Figure 2 is a side elevation of parts of Figure 1 but upon a larger scale and with
the brake in open position or "off";
Figure 3 shows an end elevation of the parts in Figure 2 in section on the
line X Y.
A shows the rear wheel of a bicycle, B its axle, C its frame, Da stud or pin on
the frame, said stud forming a horizontal bearing or fulcrum, on which is pivoted a
brake lever E near one end of said lever. F is a wheel or hub attached rigidly to
the axle B, and having preferably a V shaped groove G at its circumference. In
practice the wheel F is carried on the axle of a bicycle on the opposite side to that
occupied by the chain sprocket wheel. H is a steel or other spring strap having a
lining J of leather or other suitable material united to it, the tendency of the spring
being such that when the brake is "off" the strap will take a circular position
around and at a slight distance from the hub. One end K of the strap is attached
to the end I of lever E, and the other end M of the strap is attached by pivoting
to the end N of a link O, having its other end P pivoted to the lever E at a point
on the other side of the fulcrum D from the side on which K is pivoted.
Any means of connecting the lever end Q with a handle for operating the same
may be employed but what I prefer is a wire R running (over a pulley S on the
frame to keep the wire out of harm's way) to the end of a hand lever T pivoted to
the upper backbone of the bicycle and having a ratchet arrangement of ordinary
construction to retain the hand lever and consequently the brake in any position to
which it is moved.
When the hand lever T is as in Figure 1 the brake is hard "on," that is the
part J of the strap is pressing tightly into the groove G, and the ends K and M
are close together. When the handle of T is moved in the direction shown by
arrow U it allows the lever E to assume the position in Figure 2 so that the
ends K and M recede from one another, both ends moving at the same time, so that
the taking off of the brake proceeds from a movement at both the said ends,
ensuring rapidity. By this invention (in which the essential is the placing of
fulcrum D between pivoted ends K and P in lever E), unequal action on the hub
as the brake is applied or removed is largely avoided.

page_text: 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. In a wheel brake for bicycles and the like, a lever E fulcrummed as at D to
the frame, and a spring strap H, J having one end connected pivotally to said lever
at one side of said fulcrum, and the other end connected pivotally to a link O
which is pivoted to said lever on the other side of said fulcrum substantially as set
forth.
2. The general combination aud arrangement of parts of a brake substantially as
described with reference to Figure 2.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.