proved Means for Locking Cycles and like Vehicles.
Year: 1896

page_text: Date of Application, 27th Apr., 1898-Accepted, 8th June, 1896
COMPETE DIPITATION
Improved Means for Locking Cycles and like Vehicles.
We, ARTHUR HENRY DICKINSON, Ironmonger, of 216, Malpas Road, Brockley,
and HENRY JAMES FISHER, Engineer, of 102, Shooter's Hill Road, Blackheath,
both in the County of Kent, 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 our invention is to provide simple and efficient means specially
applicable to rear-driven bicycles and tricycles and other vehicles of like kind for
locking and securing same when not in use in such manner as to render them
temporarily inoperative aud incapable of being ridden.
According to our invention we directly lock and prevent rotation of the sprocket
driving wheel by an appliance which comprises a spring lock and bolt contained in
a simple, light, and neat casing specially constructed for fixing to any machine
adjacent to its bottom bracket and sprocket wheel. The bolt can be instantly shot
when required by manually operating a knob on the outside of said casing, and
then it engages firmly the web, spoke, or interval between the spokes of the
sprocket wheel and so prevents rotation of that wheel and the driving wheel or
wheels to which it is geared. The spring bolt cannot be retracted without the use
of a special key, so that no unauthorised person can free the wheels and ride the
machine. The lock mechanism may however in some cases be constructed to be
operated in both directions by means of the special key, but we prefer the former
action.
Referring to the accompanying drawings in further explanation,
Fig. 1 is a plan of the driving gear of a bicycle;
Fig. 2 an enlarged section on line 1-2 thereof;
Fig. 3 an elevation of sprocket wheel, showing our locking appliance in position
and the bolt shot;
Fig. 4 is a general view of the appliance; and
Figs. 5 and 6 are internal elevations showing the bolt respectively retracted
and shot.
A represents the casing of the locking appliance which is made as small, light,
and compact as possible, and B is the locking bolt, the head B' of which is of
appropriate shape, case hardened and passing through the casing. The bolt is
recessed or slotted at b and has a square back end, any forward inotion of bolt B
being constantly opposed by spring b. C is a knob fixed to a shank laterally
projecting from bolt B and working externally on the casing through a slot c which
also forms a guide for the bolt.
The lock may be of any suitable kind; that illustrated comprises a strong stop
catch L with key breast forced up by spring and carrying a fixed stop piece.
NN are two tumblers or levers pressed forward by springs n and having side
shelves n' and a deep central uotch ' adapted to receive the stop when depressed.
Any number of such levers, may be used to render the lock as secure as desired.
K is the keyhole for the reception of a key to move over the levers N N and draw
down catch L when required. R represents a socket or hole for the reception of
a fixing bolt r, Fig. 2.
Such is one construction of an effective lock, but the mechanism may be varied
without departing from the nature of our invention.
The appliance is fixed by a metal band or spring clip such as M permanently
secured by brazing or the bolt r to the stay tubes TT of the frame of the cycle

page_text: close to the bottom bracket in such position that the bolt B when shot must
engage or pass through the sprocket wheel S as shown in Figs. 1, 2, and 3.
Normally when the bolt has been retracted by the key, its recessed part b
overlies and holds down the spring catch L, the stop then entering the notch n
of the levers N as in Fig. 5. When however it is desired to leave the machine
with security against removal, by moving the bolt forward by knob C its recessed
part b clears spring catch L which is at once shot up by its spring and engages
the square rear end of the bolt as in Fig. 6, the levers N being returned by the
springs n, and the bolt remains shot and compressing its spring b. In this position
its outer end B₁ engages and securely locks the sprocket wheel S by passing
between the spokes as at s, or through holes in same or web as at s', Figs. 2 and 3.
To release the parts the levers N N are thrown forwards and the catch L
simultaneously drawn down by the key, stop again entering notch n³ until the
bolt is free to fly back by the force of its already compressed spring b¹, and all
parts return to initial positions.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved means for locking and securing cycles and like vehicles, which
comprise a spring lock and bolt contained in a casing fixed to the machine adjacent
to the sprocket wheel, the bolt being adapted when shot to directly engage and
prevent revolution of same, and to be retracted only by the use of a special key,
substantially as herein set forth.
2. The improved locking appliance for cycles and like vehicles disposed and
arranged or adapted to operate as herein described and illustrated.
Dated this 27th day of April 1896.