Improvements in Locking Mechanism for Cycles.
Year: 1897

page_text: We, HARRY WALKER, TOM WALKER, and SAMUEL GOLDTHORPE, trading as Walker
Brothers, all of Primo Works, Meanwood Road, in the City of Leeds, Cycle
Engineers, do hereby declare the nature of this invention to be as follows:-
We
Our invention relates to a combined steering and thief lock for cycles.
employ, in the T piece of the top bar of the cycle frame close to the head, a metal
bush within which is a spindle passing through the frame.
This spindle has a square part which fits closely into one end of the bush and
the T piece of the frame, and thus prevents the spindle and bush from turning
round. The other end of the metal bush is recessed for a spiral spring. The
spindle is secured in the frame by a screw. Above the square part of the spindle
is a round part, shoulder, and threaded end, and on the threaded end is screwed a
wing nut or key.
The metal bush has projections which engage with recesses in the spindle of the
handle and lock it.
By depressing the spindle the spring is compressed and the square part of the
spindle clears the square in the T piece and so allows the spindle and bush to be
turned, so that the projections upon the bush are clear of the recesses, so unlocking
the handle bar.
By repeating this it is again locked, and by unscrewing and removing the wing
nut or key the machine is locked and thief proof.
Dated this 92nd dox of Santember 1897
Improvements in Locking Mechanism for Cycles.
We, HARRY WALKER, TOM WALKER and SAMUEL GOLDTHORPE, trading as Walker
Brothers, all of Primo Works, Meanwood Road, in the City of Leeds, Cycle
Engineers, 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 :-
Our invention relates to a combined steering lock and thief lock for cycles.

page_text: Fig. 1 is a sectional elevation of the bottom lug of a bicycle steering head,
showing the lock in position.
Fig. 2 is a plan, in section, of Fig. 1.
Fig. 3 is a front elevation of a bicycle steering tube, having applied a modification
of our invention, in which the lock is made complete in itself and detachable.
Fig. 4 is a.side elevation of Fig. 3.
Fig. 5 is a plan of Fig. 4.
Fig. 6 is a plan, in section, of Fig. 4.
Similar parts are indicated in all the figures by similar letters.
In carrying out our invention we employ a metal bush A, which is mounted on a
spindle B passing through the lug or T-piece C of the steering head (see Figs. 1
and 2). The said spindle B has a square part D, which fits closely into one end of
the bush A and the lug or T-piece C, so that the bush can only turn with the
spindle, and the spindle is locked by the square part D engaging with the lug or
T-piece.
The
The other end of the bush A is recessed for a spiral spring E, which prevents
the square part D of the spindle from disengaging with the lug or T-piece C and
thus allowing the bush to turn. The spindle is secured in the frame by means of
a screw or rivet F or other suitable means. Above the square part D of the spindle
is a round part G, a shoulder or collar H to limit the movement of the spindle, and
The metal bush A has
a threaded end J to receive a wing nut K or the like.
projections or teeth L, which engage with recesses or slots in the handle bar or
steering tube M within the cycle head, and thus lock the said steering tube.
said projections or teeth L are so arranged as to correspond with opposite faces of
the square part D of the spindle B, so that a quarter turn of the spindle disengages
the projections or teeth and unlocks the steering tube M. To effect this the
collar H is depressed by means of the wing nut or key K until the square part D
on the spindle clears the lug or T-piece C. This action compresses the spring E,
so that when the spindle has been turned it automatically returns to its locked
position. The steering mechanism of the cycle can thus be locked or unlocked at
the will of the rider. By unscrewing and removing the wing nut or key K after
locking, the machine may be rendered thief-proof.
In
When required to be fitted to existing machines, our invention may be mado in
a detachable form (see Figs. 3 to 6). It is then enclosed in a casing N which is
secured to the outside of the steering tube P preferably by means of screws R.
this modification the square part D of the spindle B locks itself by engaging a
square hole in the casing N, and slots are cut in the tube to allow the teeth or
projections L to engage with and lock the inner tube M.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. A locking arrangement for cycles, in which the steering tube of the machine
is locked by means of teeth or projections mounted on a suitable spindle passing
through either the T-piece or the bottom lug of the steering head, the lock being
set or taken off by giving the spindle a quarter turn by means of a removable key
or the like, and the spindle being automatically locked, after each operation by
means of a spring, substantially as shown and described.
2. A locking arrangement for cycles, in which the steering tube of the machine
is locked by means of teeth or projections mounted on a suitable spindle passing
through a detachable casing fixed to the outside of the steering head, the lock
being set or taken off by giving the spindle a quarter turn by means of are movable
key or the like, and the spindle being automatically locked after each operation by
means of a spring, substantially as shown and described.

page_text: 3. In a locking arrangement for cycles, the combination of the bush A, having
teeth or projections L to engage with recesses in the steering tube M, the spindle
BG having an intermediate square part D, the shoulder or collar H, the removable
key K or the like, and the spring E, all arranged so as to be either a fixed or
5 a detachable part of the machine, substantially as and for the purposes shown and
described.
1000
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicant.