Improvements in Hub Brakes for Cycles and the like.
Year: 1896

page_text: Date of Application, 31st Dec., 1896
Complete Specification Left, 30th Sept., 1897-Accepted, 31st Dec., 1897
POLTIVATION
Improvements in Hub Brakes for Cycles and the like.
I. ARTHUR JAMES EDMONDS of 71 Leonard Road, Handsworth Birmingham,. in
the county of Stafford, Assistant Manager of the Palmer Tyre Ltd, do hereby
declare the nature of this invention to be as follows:-
This invention relates to hub brakes for cycles and the like in which the brake
is applied by back pedalling or reversing the direction of the pull upon the chain.
In carrying out the invention I provide the hub of the road wheel with pins or
projections which pass through slots in the chain wheel or ring and engage with
suitably shaped brake pieces. The chain or chain ring is provided with other studs
or projections also engaging with the brake pieces, the arrangement being such
that when the chain wheel is pulled by the chain in the ordinary direction or for
propelling the vehicle the effect of the studs upon the brake pieces is to keep them
out of contact with the brake surface, but when the direction of the pull is reversed
the effect of the studs upon the brake pieces is to bring them into contact with the
brake surface.
The brake pieces may be arranged to engage with a circular projection or boss
fixed to the frame of the machine or to the spindle of hub of the road wheel, the
pieces being pressed upon them when the brake is to be applied as above described,
and if preferred a second and internal brake-surface may be provided, the brake-
pieces engaging with the previously described external and also with the internal
surfaces. These two surfaces may be provided by means of a fixed dise having a
flange at its periphery with the inside of which the brake pieces engage and' a boss
in the centre with the outside of which the brake pieces engage.
The brake,pieces may be pivotted upon the studs of either the chain wheel or the
wheel hub, or may be merely loose pieces lying between the studs.
Although I have so far described this invention as being operated by the chain,
I wish it to be understood that I may use it in connection with driving mechanism
other than chain-gearing for example.
Dated this 31st day of December 1896.
BOULT & WADE
Agents for the Applicant.
IPLETE PIECIFICATION.
Improvements in Hub Brakes for Ovcles and the like.
I, ARTHUR JAMES EDMONDS of "Ventnor," Stanley Road, Kings Heath,
Birmingham, Engineer late of 71 Leonard Rd., Handsworth, Birmingham do here-
5 by declare the nature of this invention and in what manner the same is to be per-
[Price 8d.]
I, ARTHUR JAMES EDMONDS of "Ventnor," Stanley Road, Kings Heath,
Birmingham, Engineer late of 71 Leonard Rd., Handsworth, Birmingham do here-
5 by declare the nature of this invention and in what manner the same is to be per-
[Price 8d.]

page_text: formed, to be particularly described and ascertained in and by the following state-
ment:-
This invention relates to an improved brake for velocipedes especially to that
type which is put into operation by exerting, a retarding pressure on the driving
cranks or reversing the direction of the pull of the chain.
In the accompanying drawing which illustrates this invention:-
Figures 1, 2, 3, 4, and 5 are views showing the improved brake as applied to the
driving wheel of a cycle.
Figure 1 ista view in side elevation.
Figure 2 is a view in longitudinal section showing the brake mechanism on
line Y, Z. of figure 5.....
Figure 3 is a view in side elevation of the hub with the sprocket wheel and
brake blocks removed.
Figure 4 is a view in side elevation of 'the hub sprocket wheel.
Figure 5 is a view in transverse section on the line W, X., of figure 2.
Throughout the views similar parts are marked with like letters of reference.
The brake consists essentially of a circular projection or boss, which can be
named the external brake surface, mounted on the axle of the hub of the road
driving wheel or fixed' to the frame of the machine; and if desired in addition a
disc having an annular flange or ring, which can be named the internal brake
surface,. similarly fixed to the axle of the hub of the road driving wheel or fixed
to the frame of the machine, and of a brake block or blocks carried on the sprocket
wheel of the hub of the road driving wheel which block or blocks are actuated by
pins or projections on the hub of the road driving wheel which said pins pass
through slots in the said sprocket wheel carried by the hub before mentioned;
and the said block or blocks are adapted to act against the periphery of the external
brake surface before mentioned, and if desired also against the internal surface of
the internal brake surface before mentioned, when the annular velocity of the
said sprocket wheel is less than that of the hub of the road driving wheel the said
sprocket wheel being so mounted upon the hub of the said road driving wheel that
it has a small predetermined rotary movement apart from the said hub.
A convenient method of construction is the following;-
also
The hub A of the road driving wheel is provided with pins or projections B
which pass through slots C in the sprocket wheel D of the said hub and engage
with suitably shaped brake block or blocks E in the manner hereinafter described.
The said sprocket wheel D is: also provided with pins or projections
engaging with the brake block or blocks E, the said sprocket wheel is mounted
loosely on the hub of the road driving wheel. Motion is transmitted from the
sprocket wheel D to the hub A by the pins or projections B on the said hub
engaging with the ends of the slots C in the sprocket wheel D or with the bottom
end of the slot in the brake block or blocks E, the said slots in
both the before-mentioned sprocket wheel and brake block or blocks allowing
the said sprocket wheel to have the before mentioned small predetermined radial
movement apart from the said hub. The brake block or blocks E may be pivotted
upon the pins or projections of either the sprocket wheel D or the road driving
wheel hub A, or may be merely a loose piece or pieces lying between the said pins
or projections. The said brake block or blocks E may be arranged to engage with
the periphery of a circular projection or boss G, which can be named the external
brake surface, which is fixed to the axle of the hub A of the road driving wheel or
to the frame of the machine; and if preferred a second and internal brake surface
may be provided by means of a fixed disc H having a flange or ring at its periphery,
which can be named the internal brake surface, the brake block or blocks E
engaging with the previously described periphery of the circular projection or
boss G, called the external brake surface, and the internal surface of the before
mentioned flange or ring of the disc H. The said circular projection or boss. G
may be a piece apart from.the said disc, H or it may be made in one piece with the
Baid disc.

page_text: The action of the brake is as follows:-
When the sprocket wheel D of the road driving wheel is pulled by the chain in
the ordinary direction, that is for propelling the vehicle, causing the annular
velocity of the said sprocket wheel to be as great as that of the hub of the road
driving wheel the effect of the pins or projections B carried by the hub A of the
road driving wheel upon the brake block or blocks E is to keep it or them out of
contact with the brake surface or surfaces; but when the direction of the pull of
the chain is reversed, as is the case when back pressure is exerted on the cranks-
as in the act of back pedalling causing the annular velocity of the said sprocket
wheel to be less than that of the hub of the road driving wheel the pins or pro-
jections B carried by the said hub and passing through the slots C in the sprocket
wheel Dso act upon the brake block or blocks as to bring it or them into frictional
contact with the brake surface or surfaces provided by the boss or projection G and
the flange on the disc H.
I may vary the details of construction in any convenient manner but without
departing from the substance of my invention. In some cases I may use either
one of the brake surfaces independant of the other, and I may vary the number and
form of the brake block or blocks, and may line either or both of the brake surfaces
with any suitable material. And if desired I may, in providing the internal brake
surface, dispense with the disc H and substitute a ring attached to the frame of
the machine.
Although I have so far described this invention as being operated by the chain
I wish it to be understood that I may use it in connection with driving mechanism.
other than chain-gearing for example.
This invention may be applied to other parts or in othen positions otherwise
than the hubs of mechanically propelled vehicles, for example it is equally
applicable to the main axle of a tricycle.
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. The improved hub brake constructed and operated sulistantially as heroin-
before described and illustrated with reference to figures 1, 2, 3, 4, and 5.
2. In a hub brake, the combination of a sprocket wheel, mounted substantially
ns described, carrying pins or projections and having radial slots, with a hub carry-
ing pins or projections which pass through the said slots in the said sprocket
wheel, and with a brake block or blocks which are actuated by the said pins or
projections carried by the said hub substantially as described.
3. In a hub brake, a brake block or blocks carried by the sprocket wheel and
adapted to be operated by fixed pins or projections on the hub, simultaneously,
against an external brake surface and an internal brake surface, substantially as
described and illustrated with reference to figures 2, 3, 4 and 5 of the accompanying.
4. In a hub brake, a brake block or blocks carried by the sprocket wheel and
adapted to be operated by fixed pins or projections on the hub, against a boss or
projection, herein before called the external brake surface, substantially as described
and illustrated with reference to the accompanying drawings.
5. In a hub brake, an external brake surface and an internal brake surface sub-
stantially as hereinbefore described, used jointly or separately, and which are fixed
to the axle.of the hub of the road driving wheel or to the frame of the machine, in
the manner and for the purpose herein set forth.
Dated this 29th day of September 1897.