Year: 1897

page_text: Date of Application, 26th Apr., 1897-Accepted, 12th June, 1897
1, ERNST FRANZKE, of 4b Warstrasse, Hanover, in the Empire of Germany,
Locksmith, do hereby declare the nature of this invention and in what manner the
ame is to be performed, to be particularly described and ascertained in and by the
ollowing statement :-
The present invention relates to a cycle lock adapted to be conveniently operated
nd effective in its action, the said lock being designed to secure the cycle to which
t is applied against theft.
For this purpose an arm passes between the spokes of the front wheel or of the
rear wheel according to the arrangement, so as to prevent the turning movement
of the said wheel, such arm being so arranged that it can only be liberated by the
key which is in the possession of the cyclist.
The improved lock is represented in the accompanying drawing in which
Figure 1 shows the lock in side elevation, the arm being out of action.
Figure 2 shows the corresponding front elevation.
"
Figure 3 is a similar front elevation, the arm being in the locking position.
Figure 4 is a plan of Figure 3, and
Figure 5 represents a hook which takes up the arm in the locking position.
According as the locking arm is to engage with the spokes of the front or rear
wheel the lock is fastened to the front or rear fork.
In the former case I secure to the right-hand arm of the front fork a collar a
the eyes a' and a² of which serve as a guide to a spindle c. Upon this spindle c
I provide and connect in a suitable manner, an arm 7 which by being turned can
be caused to engage by means of its wedge shaped projection with the recesses k
and arranged at right angles to each other. The recess k' is formed in a lug a³
arranged laterally on the eye a', whilst the recess k is turned to the front and is
likewise provided with a wedge surface. A spiral spring o, which is fixed with its
upper end in that part of the arm 7 which is secured to the spindle c and with its
lower end in the bracket a², continually tends to force the projection i upwards and
into the recess k or k¹ according to its position, whilst it causes the spindle c, in the
turning movement of the latter, to move back to its position of rest. This turning
movement of the spindle c through an angle of 90 degrees is effected by a handle &
arranged at the upper end of the same and has for its object to bring the arm / to
the position of the recess k or k¹.
In the latter the arm / extends between the spokes of the front wheel, Figure 3,
whilst in the direction of the recess k it permits of the free turning movement of
the wheel.
The mode of operation would therefore be as follows:
On turning the handle d through an angle of 90 degrees the two wedge
faces of the recess k and of the projection cause this projection to leave the
recess k, and after the turning movement to snap into the recess k with the
co-operation of the spring o, the arm occupying, a place between the spokes
of the front wheel, and preventing the turning movement of the said front wheel.
In this movement of the spindle c with the arm the spring o is put in tension.
When the handle d is now pressed down, the projection will leave the recess k¹
and the spring o will automatically move the arm to the position corresponding
to the recess k (Figure 1), so that the movement of the front wheel is not interfered
with
:

page_text: In order that the spindle c may not be pressed down by an unauthorized person
for the purpose of liberating the wheel, a lock fis arranged on the spindle c, in
which lock is provided a bar e¹ adapted to be operated by the handle e.
This bar,
as soon as the arm occupies the locking position, is pressed down. so that it
strikes against the eye a¹ and is held in this position by any desired locking
mechanism which can be released only by the key in the possession of the cyclist.
In order to obviate the breakage of the arm in the locking position it is
advantageous to fix to the left hand prong of the fork a hook m adapted to receive
the arm, as shown in Figure 5. In like manner the fixing, instead of being effected
by collars may take place by soldering and the lock may be provided with a guard
plate for protecting it against dust.
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:-
First. A cycle lock in which, for protection against theft, an arm / passes
between the spokes of the cycle wheel, characterized by the feature that the said
arm on turning the spindle c by which it is carried, (owing to the wedge shaped
faces of the recess k and projection of the arm which slide upon each other)
will leave the recess k and by the pressure of a spring o put in tension in
the said turning movement of the spindle through an angle of 90 degrees, will
engage with the recess k¹ and act as a locking device between the wheel spokes,
whilst by pressing down the spindle c by means of the arm & the arm is liberated
from the. recess k' and is moved back by the spring o to the position of rest
permitting the movement of the wheel.
Second.. In the cycle wheel lock characterized in the first claim the arrangement
of a lock securing the locking position of the arm which, by means of a bar e¹
pressed down by hand, prevents the downward movement of the spindle, the said
bar being held in its position by the locking mechanism and being only released
by a key in the possession of the cyclist.
Dated this 26th day of April 1897
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.