Improvements in Velocipedes.
Year: 1893

page_text: Date of Application, 24th May, 1893-Accepted, 5th Aug.,
1893
COMPLETE SPECIFICATION.
Improvements in Velocipedes.
I FREDERICK WILLIAM GOLBY of 36 Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention as com-
municated to me by Alfred Reisinger of Walheim, Wurtemburg, Germany,
Merchant, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention which relates to improvements in velocipedes as hereinafter
described has for its object, to aid the treading power of the rider and to produce
a uniform movement of the vehicle with means for automatically applying the brake
when the speed exceeds the normal.
In the accompanying drawings
Figure I shews a side elevation of a velocipede constructed in accordance with
this invention.
Figures 2 and 3 are respectively front and side elevations of the rear part of the
velocipede on an enlarged scale; and
Figures 4, 5, and 6 shew details of construction.
The driving mechanism is composed of three toothed wheels a, a', a³, placed one
beneath the other and engaging in one another. The upper wheel a bears on
its shaft two cranks bbwhich are connected with the two pedal cranks c c by
rods d d so as to form a parallelogram of articulation. Consequently, when the
pedal cranks are rotated the toothed wheels will also be rotated.
On the shaft of the lower toothed wheel a' a chain wheel e is placed, over which
a link chain fruns to the chain wheel e¹ placed on the axle of the driven wheel of
the velocipede. Between the two drive wheels of the velocipede there may also be
applied two smaller wheels g g for supporting the bearing frame which carries the
toothed wheels a, a', a*. Between the two chain wheels e e¹ and within the chain f,
is a third chain wheel e bearing on its shaft a bevel wheel having very broad
and very high teeth gearing with a similarly toothed bevel wheel, the shaft of
which latter forms a movable rod i having its bearings in the frame of the
velocipede. This rod i carries two regulator balls k which in consequence of the
centrifugal force developed by the rotating rod i will during the revolutions of
the said rod separate more or less far from one another and from the rod.
The action of the two regulator balls is a double one. Firstly, the rotating balls
by the vis inertia will act like a fly wheel and will keep uniform the movement of the
chain wheels. Secondly, the balls are connected to the brake in such manner, that
they will cause the same to be automatically applied when their speed of rotation
is so great as to cause them to deviate considerably from the normal plane of
revolution. The socket fixed on the rod i is connected by the arms to the ball
arms k which are jointed to a socket (see Figure 5) secured on a tubular extension
of the lower part m' of a fastener bolted to the frame tube n. To the upper part
of the fastener is secured a bent lever o¹ o³, one arm o¹ of which, is slotted, and in
which engages the pin p of a ring p'. This ring is situated between two collars q q
on the rod i which latter is loosely encircled by the tubular extension of the frame
fastener. The other arm o³ of the bent lever is connected by suitable link work to
the brake rod r (see Figures 3 and 4).
The more the balls k separate from one another, the more the socket and
therewith also the rod i will be lifted. In a certain position the bent lever o¹ o²
will be so far displaced, as to force down the brake rod r so as to bring the brake
into action, thereby diminishing the speed. With the lowering of the balls the
brake will thereupon again be put out of working,

page_text: By the lifting of the rod i the bevel wheel ¹ will also be lifted, but as the teeth
of the wheels and h are very large and high, both wheels at the lifting of rod i
will at the first still remain in gear and the rod i will remain turning. After the
rod i has exceeded the normal speed of revolution, it will be lifted so high that the
wheels and are out of gear with one another.
Although at the lifting of the rod i the wheels 'h do not fully engage with one
another, this will not prejudice the security of working of the contrivance, as there
is no great amount of weight in the rod i and its accessories.
If the brake be worked by hand in the usual way and is very strongly put on,
the rod i will be lifted so far that the bevel wheel will be wholly disengaged
from the cone wheel and the momentum of the swinging balls k will thus be
removed from the driving chain f, enabling the rider to bring the velocipede quickly
to a standstill.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A velocipede characterized by a couple of swinging balls k k that are placed on
a rod i rotated by the driving chain f and which balls by their gyration will act on
the driving chain, and in consequence of an excessive speed of drive will by their
displacement from the rod cause the application of the brake to the velocipede
substantially as and for the purpose hereinbefore set forth and illustrated.
2. A velocipede constructed and operating substantially as described and
illustrated and for the purpose stated.
Dated this 24th day of May 1893.
F. W. GOLBY,
36, Chancery Lane, London, W.C.