Improved Device for Locking the Driving Gear of Bicycles and similar Vehicles.
Year: 1899

page_text: Date of Application, 7th Sept., 1899-Accepted, 7th Oct., 1899
COMTEELE
Improved Device for Locking the Driving Gear of Bicycles and
similar Vehicles.
I, WILHELM MORRIS, of 183, Hereford Street, Christchurch, in the Provincial
District of Canterbury, in the Colony of New Zealand, Medical Practitioner, 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 this invention is the locking of the driving gear of cycles and
according thereto a lock having a bolt operatable by a key in the ordinary
manner is fixed upon the frame of the cycle the bolt when projected engaging
between two teeth or over one tooth of the sprocket wheel in a chain driven
machine or taking between the teeth of a pinion in a tooth wheel driven cycle.
In the accompanying drawings:
Figures 1, 2 and 3 are several side elevations of portion of the sprocket driving
gear of a bicycle illustrating the employment of my invention.
Figure 4 is a side elevation illustrating the use of my invention in connection
with tooth wheel driving mechanism.
Figure 5 is an elevation of a lock with the front casing removed to show the
interior mechanism.
Similar letters refer to corresponding parts in all the figures.
Referring to Figures 1 to 4:
The lock (a) is secured to the chain stay (b) of the bicycle by rivetting, brazing
or other well known means. The bolt (c) of the lock is shown in its normal
position in Figure 1. It is operatable by a key passed into the key hole (d)
and the end of the bolt is formed to fit between two of the sprocket teeth (e) of
the chain wheel (f) as illustrated in Figure 2.
To enable the bolt to engage the wheel in another position a notch (g) is formed
in the bolt of the shape of, and designed to receive, one of the sprocket teeth (e)
as illustrated in Figure 3.
In Figure 4 bolt (c) is shaped at its end to take between two teeth (e) of the
pinion wheel (f) used in a tooth wheel driven cycle.
Almost any form of lock mechanism may be used but as an illustration
Figure 5 shows the bolt (e) provided with two notches (/) one or other of which
receives a pin (2) according to the position of the bolt.
A spring (k) presses the bolt downwardly towards pin (2) and a recess in the bolt
receives the key which lift the bolt against pressure of spring (k) and projects or
withdraws it as required.
The end of bolt (c) may be formed to pass between two of the teeth (e) only, or
it may only have the notch (9) to receive one of said teeth but it is preferable to
form the end of the bolt as described.

page_text: 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:
-
1. A lock upon the frame of a cycle the bolt of which is adapted when in its
projected position to engage between teeth upon a wheel of the driving gear of
the machine substantially as specified.
2. A lock upon the frame of a cycle the bolt of said lock having a notch in its
outer end adapted to receive a tooth upon a wheel of the driving mechanism of
the machine substantially as specified.
3. A lock upon the frame of a cycle the bolt of said lock being formed to
engage between the teeth upon a wheel of the driving gear of the machine, said
bolt also having a notch adapted to receive one of said teeth substantially as
and for the purposes herein described and illustrated.
BOULT, WADE & KILBURN,
Agents for the Applicant.