Improvements in Bicycle Locks.
Year: 1897

page_text: Date of Application, 13th Feb., 1897-Accepted, 3rd Apr., 1897
Improvements in Bicycle Locks.
I, FREDERICK ADOLPHUS CLARRY, residing at 77 Grange Avenue, in the
City of Toronto, in the County of York, in the Province of Ontario, Merchant,
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 to provide a bicycle with a lock, which when set
will positively prevent the revolution of the wheel to which it is directly or
indirectly connected, and to so arrange the bolt of the lock that it can be shot
into its keeper without the employment of a key; and the invention consists
essentially of providing the axle of one of the wheels, or in providing the crank
axle with a socket or plurality of sockets (or with one tooth or a plurality of teeth
in lieu of sockets) each socket (or tooth) capable of acting as a keeper for the
bolt, and providing the lock with a bolt adapted to engage one of the said sockets
(or teeth) and positively prevent the revolution or partial revolution of the axle,
and, consequently, the wheel; the whole device being hereinafter more fully set
forth and more particularly pointed out in the claims.
In the drawings:
Fig. 1 represents a perspective view of the crank axle bracket, partially broken
away to show the crank axle provided with a plurality of sockets, and the bolt of
the lock engaging one of the sockets.
Fig. 2 is a similar view showing the bolt of the lock disengaged from the socket
in the axle.
Fig. 3 is a view of the outside of the lock.
Fig. 4 is an enlarged sectional view of the lock.
Fig. 5 is a view of the bolt.
Fig. 6 is a view of one of the tumblers.
Fig. 7 is a view of the frame for holding together the lockworks, partiall
broken away to show the lock mechanism.
Fig. 8 is a cross sectional view of the cap for the lock-case.
Fig. 9 is a view of the trip dog for supporting the bolt.
Fig. 10.is a view of the top of the lockcase.
Like letters of reference refer to like parts throughout the specification and
drawings.
A represents the crank axle bracket; B the crank axle journaled in suitable
bearings C within the bracket A; D represents a collar mounted on the
axle A. In the collar D are formed a plurality of peripheral sockets E. As
shown in the drawings four sockets are employed, but I may use one or any
number. Instead of providing the axle B with a collar D I may form the
sockets E in the axle, or I may provide the axle with a plurality of teeth
instead of using the sockets. F represents a lock case connected to the
bracket A, the lower end of the case being opposed to the collar D. Within the
case F is a frame G for the works of the lock. The frame G consists of a
back g, and front and sides g', g" respectively. The inner side of the back g is
provided with an inwardly projecting pin H. I represents the bolt, having a
longitudinal slot J through which extends the pin H. The movement of the
bolt I is limited by the ends of the slot J coming into contact with the pin H.
: Prime nd 1

page_text: .
Formed in the top of the back 9 is a recess K, and rigidly connected to the back
of the bolt I is a pin L, which extends through the recess K beyond the back g.
Connected to the bottom of the back 9 is a pin L', and attached to the pins L, L'
is a spring M. The tendency of the spring M is to draw downwards the bolt I.
N represents a stop connected to the front of the bolt, and O, O, represent two
tumblers, one end of each of which is mounted on the pin H, and the opposite ends
of which are adapted to engage the stop N. Each of the tumblers O, O, is fitted
with a slot o, adapted to be moved into a position opposite the stop N, to allow of
the tumblers being provided with a spring o' to move the tumblers into position
to allow of their ends engaging the stop N of the bolt, when shot, to prevent its
withdrawal until the insertion of the proper key P. Q represents a tooth formed
in the side of the bolt I, and R represents a trip dog, one end of which is adapted
to engage the tooth Q to hold the bolt in its withdrawn position, and the opposite
end of which projects through the top of the case F. S represents a spring
connected to the trip dog R, and adapted to bear against the adjacent side of
the frame G, to hold the end of the trip dog R in engagement with the tooth Q.
S represents a washer of elastic or other material, connected to the under side of
the top of the case F, and bearing against the adjacent end of the trip dog R,
to press outwards the adjacent end of the dog R, and more securely holl the
opposite end of the said trip dog in engagement with the tooth Q. T represents
a cap for the case F, and t represents a cam connected to the under side of the
top of the cap, and adapted to engage the adjacent end of the trip dog R, in order
that the opposite end of the trip dog may be released from engagement with the
tooth during the movement of the cap. U represents a key-hole formed
through the cap T and case F for the insertion of the operating key.
The use of the lock is as follows: The cap T is turned to bring the cam t into
engagement with the adjacent end of the trip dog R. The engagement of the
cam t with the adjacent end of the trip dog Ŕ throws the said end inwards, and
the opposite end of the trip dog out of engagement with the tooth Q. The
disengagement of the trip dog and tooth permits the spring M to shoot downwards
the bolt I towards the collar D, and if the bolt I during its downward movement
is opposed to one of the sockets E, it will immediately enter the socket, or if a
socket is not opposed to the bolt when the bolt is shot, the bolt will enter the first
socket opposed to it during the revolution of the wheel, the socket then acting as
a keeper for the bolt. The entry of the bolt. I into one of the sockets E positively
prevents the revolution of the axle. I do not confine myself to the use of a collar,
as the sockets can be formed in the axle B.
I have shown the lock applied to the crank axle bracket and crank axle of a
bicycle, but I may apply it to the hub and axle of either the driving wheel or the
steering wheel, if I so desire, in those bicycles where the axle remains stationary
and the hub revolves about the axle; and in those cases where the axle revolves
with the bub, I can attach the lock to the bearings. A lock of this kind forms an
integral part of the bicycle, and, consequently, is constantly carried with it. By
the arrangement of the lockworks the bolt can be shot into its keeper without the
employment of a key, and when shot into its keeper will completely arrest the
revolution of the crank axle.
When the bolt of the lock is shot into its keeper it is impossible to unscrew the
lock and remove it from the bicycle. I do not confine myself to the use of
any specific number of tumblers, as I
number that I find
advisable.
may use
any
By using a lock of this description it is utterly impossible after the bolt has
been shot to revolve or partially revolve the wheel, to which the lock is directly
or indirectly connected, without first withdrawing the bolt from its keeper,
and thus the theft of the bicycle, to which the lock is attached, is practically
prevented.
The cam is placed in such a position in relation to the key-hole U in the
cap T as to disengage the trip dog R when the cap is being turned to bring

page_text: the key-holes opposite each other, and to permit of the trip dog engaging the
bolt, when the key-holes are opposed. When the key-holes are not opposed the
cap T prevents the entry of dust or other foreign particles to the lock.
Having now particularly described and ascertained the nature of my said inven-
tion, I hereby declare that what I claim is :
1. In a bicycle, a lock having a bolt adapted to engage the axle, and prevent
the revolution of the wheel, substantially as specified.
2. In a bicycle, the combination of an axle having a keeper, and a lock
provided with a bolt adapted to engage the keeper, and prevent the revolution of
the wheel, substantially as specified.
3. In a bicycle, a lock having a bolt arranged to engage the axle, and arrest
the revolution of the wheel, substantially as specified.
4. In a bicycle, the combination of an axle provided with a socket, a lock
having a bolt adapted to engage the socket and prevent the revolution of the
wheel, substantially as specified.
5. In a bicycle, the combination of an axle having a socket, or a plurality of
sockets, a lock provided with a bolt adapted to enter the socket and arrest the
revolution of the wheel, and a trip dog to engage the bolt and hold it in its
withdrawn position, substantially as specified.
6. In a bicycle, the combination of an axle having a socket, or a plurality of
sockets, a lock provided with a bolt adapted to enter the socket and arrest the
revolution of the wheel, a trip dog to engage the bolt, and hold it in its withdrawn
position, and a series of tumblers to prevent the withdrawal of the bolt except by
the operating key, substantially as specified.
7. In a bicycle the combination of an axle having a socket, or a plurality of
sockets, a lock provided with a bolt adapted to enter the socket and arrest the
revolution of the wheel, a trip dog to engage the bolt and hold it in its withdrawn
position, a series of tumblers to prevent the withdrawal of the bolt except by the
operating key, and an elastic washer to hold the trip dog in engagement with the
bolt, substantially as specified.
8. A bicycle lock consisting of a case, a moveable bolt within the case, a trip
dog to hold the bolt in its withdrawn position, a spring to shoot the bolt when
released from the trip dog, a cap for the casing, a cam carried by the cap,
adapted to engage the trip dog and release it from the bolt, substantially as
specified.
9. A bicycle lock consisting of a case, a moveable bolt within the case, a trip
dog to hold the bolt in its withdrawn position, a spring to shoot the bolt when
released from the trip dog, a cap for the casing, a cam carried by the cap
adapted to engage the trip dog and release it from the holt, an elastic washer to
hold the trip dog in engagement with the bolt, and tumblers to prevent the
withdrawal of the bolt except on the insertion of the operating key, substantially
as specified.
10. The bicycle lock hereinbefore described and illustrated in the accompanying
drawings.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.