Year: 1897

page_text: :-
I, ALFRED BALDWIN, of 40, Grosvenor Park, Camberwell, in the County of London,
Commercial Clerk, do hereby declare the nature of this invention to be as follows:-
This invention relates to a device for use with cycles for the purpose of giving an
alarm should an unauthorized person attempt to remove them when left unattended.
According to the invention I provide a bell the hammer or hammers of which
is or are adapted to be operated by toothed wheels. In connection with the train of
wheels I provide a spring barrel arrangement of ordinary construction and so
arranged that the spring after it has been wound and released rotates the hammer
or hammers and thereby sounds the bell.
The hammer spindle is provided with one or more pins adapted to bear against
one end of an arm or rod so as to hold the spring in its coiled position and thereby
prevent the hammers from rotating, the other end of the said arm or rod when
in use projecting into the path of the spokes of the cycle wheel but being normally
held out of the path of the spokes by a suitable catch.
The device is advantageously attached to one branch of the wheel fork and the
rider on dismounting releases the catch which holds the arm out of the path of the
wheel spokes and turns the said wheel back until a spoke holds the arm out straight.
He then winds up the spring which is held coiled by the pin or pins upon the
hammer spindle bearing against the inner end of the said arm or rod. Should any
unauthorized person now attempt to remove the machine the arm is moved by the
spoke thereby releasing the hammer spindle and allowing the spring to rotate
the same and ring the bell so as to give warning that the cycle is being removed.
A suitable lock, for instance, a ratchet and pawl arrangement (the pawl of which
can be put in and out of engagement by a key) is provided whereby the spring can
be locked in its coiled position so as to obviate the necessity of allowing it to run
down each time after the cycle has been left unattended.
1007

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:
This invention relates to a device for use with cycles for the purpose of giving an
alarm should an unauthorized person attempt to remove them when left unattended.
According to the invention I provide a bell the hammer or hammers of which
is or are adapted to be operated by toothed wheels. In connection with the train of
wheels I provide a spring barrel arrangement of ordinary construction and so
arranged that the spring after it has been wound and released oscillates or rotates
the hammer or hammers and thereby sounds the bell.
The hammer spindle is provided with one or more pins adapted to bear indirectly
against one end of an arm or rod so as to hold the spring in its coiled position and
thereby prevent the hammers from oscillating or rotating, the other end of the
said arm or rod when in use projecting into the path of the spokes of the cycle
wheel but being normally held out of the path of the spokes by suitable means such
as a spring.
A suitable lock is provided whereby the spring can be locked in its coiled position
so as to obviate the necessity of allowing it to run down each time after the cycle
has been left unattended.
In the accompanying drawings:-
Figure 1 is an elevation of an alarm device made according to the invention
and shewn applied to the rear fork of a bicycle:
Figure 2 is an end view of the said device with the end plate removed:
Figure 3 is a longitudinal section of the device; and,
Figure 4 a section on the line 4-4 Figure 3; and,
Figure 5 is an end view, drawn to a smaller scale, of a bicycle fitted with my
alarm device which is shewn in its operative position.
a is the case of the apparatus, which said case is adapted to be secured to the
tubes b, of the rear fork of a bicycle, as shewn, by bolts a¹, a¹ or by any other
suitable means. c is the bell and d is the hammer thereof. The said hammer is,
as above mentioned, designed to be operated by means of clockwork mechanism
in any suitable manner. The arrangement shewn in the drawing, and which I will
now describe, is that which I prefer although it is to be understood that any other
suitable means for transmitting the movement of the coiled spring to the hammer
can be employed. The arrangement illustrated comprises the spring barrel e, the
spring of which can be wound up in the ordinary manner by a key, and the ratchet
and pawl and the toothed wheel g mounted upon the barrel spindle e¹, the said
toothed wheel g gearing with a pinion h mounted upon a spindle h¹ carrying a
crown wheel i which is arranged to oscillate the cranked spindle ; to which the
hammer d is secured.
kis the arm by means of which the clockwork mechanism is locked by the bicycle
wheel, the said arm & being mounted in bearings k¹ inside the case a of the alarm
device and projecting through the said case and being bent at its free end so that
it can be brought into the path of the spokes of the rear wheel of the bicycle as
shewn in Figures 1 and 5; normally, that is to say, when the device is in its
inoperative position, this arm k is held out of the path of the said wheel through
the medium of the spring k² as indicated in broken lines in Figure 4.
The arm k is provided inside the case a of the device with a pin 7 which,
when the said arm is turned into the operative position shewn in Figures 1, 2, 3
and 5, presses against a spring strip m which carries a pin m¹ so as to press and hold
the said pin m¹ in the path of a pin or arm n mounted upon the hammer spindle j
and thereby lock the said spindle against oscillation. When the arm k is turned
back to its normal position the hammer spindle is free to oscillate as hereinafter
explained.
To employ the device, the rider, on dismounting, turns the arm k against the
action of the spring into the path of the wheel spokes and rotates the said wheel
until a spoke comes in contact with and holds the arm out straight. He then winds
up the spring which is held coiled by the pin n upon the hammer spindle ; bearing

page_text: gainst the pin m³ which has been brought into its path by the manipulation
E the arm k. Should any unauthorized person now attempt to remove the machine
he arm is released by the spoke thereby releasing the hammer spindle j and
llowing the spring to oscillate the same and ring the bell c so as to give warning
hat the cycle is being removed.
o is the lock which is provided for enabling the spring to be locked in its coiled
position and obviate the necessity of allowing it to run down each time after the
cycle has been left unattended. To this end the bolt o' of the lock o bears against
one end of a lever which is pivoted upon a spindle q carrying a pawl or hooked
arm r which normally, that is to say, when the bolt o' projects from the lock-case,
is held out of the path of the oscillating arm or pin n but which when the bolt o¹
has been withdrawn into the lock-case by the key in the usual manner, is turned
into the path of the said pin n by the spring plattached to the lever p and thereby
holds the pin n against oscillation.
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 cycle alarm device comprising a bell, the hammer of which is adapted to
be operated by clockwork mechanism, and an arm which, by engaging with a
movable part of the cycle such as a spoke, locks the hammer, substantially as, and
for the purpose, hereinbefore described.
2. In a cycle alarm device, the combination of a bell, of a hammer which is
oscillated by suitable clockwork mechanism, of an arm designed to be brought
against and held by one of the cycle wheels so as to lock the hammer against
oscillation or rotation and of means for locking the hammer independently of the
arm substantially as, and for the purpose, hereinbefore described.
3. The combination and arrangement of parts forming the cycle alarm device
hereinbefore described and illustrated in the accompanying drawings.
eT... 1898
G. F. REDFERN & Co.,
4 South Street, Finsbury, London, Agents for the Applicant.