Year: 1897

page_text: Date of Application, 11th Sept., 1897-Accepted, 30th Oct., 1897
I, EDWARD NEWELL CASE of 2345 Wabash Avenue, Chicago, Illinois, U.S.A., Doctor
of Medicine, 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 :-
This invention relates to an explosive aların in conjunction with a padlock in which
the mechanism is arranged to operate upon a firing pin which comes in contact with
an explosive cap or cartridge.
The object of the invention is to provide a locking apparatus by which, if
tampered with, or an attempt is made to pull from its attachment, to pick or open
it with a false key while attached to a door, trunk, bicycle, or other object, an aların
is produced without unlocking the padlock or apparatus.
In the accompanying drawing
Fig. 1 is a sectional elevation of the complete lock, locked.
Fig. 2
locked.
a plan view of the shackle swung to one side ready to be attached and
Figs. 3, 4, 5, are respectively a plan, a sectional elevation, and a bottom view of
the firing device.
Figs. 6 to 9 are views of details.
Fig. 10 shews the application of the lock to a sprocket wheel.
In the lock casing S is the key hole a² (Fig. 10) in which turns the shaft a
(Figs. 1, 7, 9) having a slot in one side into which the key is inserted, said slot
allowing the key to turn against the cam w (Figs. 7, 9) which is rigidly attached to
said shaft a.
From the upper part of casing S projects the shackle A which is attached by
swivel I to connecting rod C this latter having attached to it a pawl i and spring c.
In the cylinder & is a spring pressed plunger having a tendency to eject
shackle A through the action of the spring t.
The plunger coming in contact with dog g (Figs. 1, 6) forces the latter through
slot o into slot 3 (Fig. 4) while locking, thereby locking the firing device (Fig. 4) to
padlock, as shewn in Fig. 1. The dog g being attached to spring 2 which has a
tendency to force dog g out of slot o³ while unlocked, allows the removal of the said
firing device from padlock.
b, b, bs are tumblers of different forms, containing the slots v,
former on turning the key coincide allowing the pin 82 on the cam w
slot and thence allowing cam w to turn against pawl i releasing said
double lever n while unlocking.
3, and i³ the
to pass into
pawl ¿ from
To insert a cartridge, the firing device (Fig. 4) must be detached from barrel F
with a knob L on key (Fig. 8) said knob L being inserted into slot 2 and turning
the firing device, which has projection (Figs. 3, 4), from slot p to slot O and

page_text: withdrawing the same, leaving the barrel clear for its insertion into the chamber 621
(Fig. 6).
To insert the firing device the projection z (Figs. 3, 4) must be placed so as to
pass through the slot O (Fig. 6) when it is free to turn into the position shewn in
Fig. 1.
During the insertion of the firing device the trigger m will catch upon the barrel F
provided with the edge n² drawing in the firing pin and compressing the spring ; as
in Fig. 1.
It will be seen that if force is applied to eject the shackle A from its position in
Fig. 1, its action will be transmitted to the trigger m through the medium of the
pawl and double levers n and o causing the trigger m to slip off the edge n²
leaving the compressed spring free to act upon the firing pin x thence upon the
cartridge causing concussion. It will also be observed that a false key moving any
or all of the tumblers b, 62, 63 a fraction of an inch too far, will force trigger m from
its position and produce the same result as in the preceding paragraph.
l
C2 is a spring which, being made strong or weak regulates the tension required to
fire the lock. e (Fig. 1) is a stop to prevent plunger v from jumping from cylinder d.
f (Figs. 1, 4) is the shell of the firing device. is a cartridge in position to the
fired. ka stop that limits the longitudinal travel of shackle A. (Figs. 1, 2) a pin
which acts as a stop to prevent shackle A turning further than is shewn in Fig. 2.
m2 is a spring which gives an outward movement to trigger m. 03 (Fig. 4) a socket
for dog to prevent the firing device from turning when locked. q (Fig. 2) a
passage into which the end of shackle A passes when locking. (Fig. 1) is a
bearing through which connecting rod Cinoves. 72, 73, 74, are projections and
depressious on the key, which while unlocking, cause the tumblers to coincide
without their touching the trigger m. 8 is a stop which limits the motion of
pawl and double lever n to prevent unlocking by simply pulling the shackle.
(Fig. 2.) is the muzzle of the barrel f. w² is a projection on the key which turns
against cam w turning this cam against pawl i while the slots v2 of the tumblers
coincide and allow the passage of pin 82 (Fig. 1).
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 :-
1. In an explosive aların padlock, the shackle A attached by swivel I to connecting
rod C to which is attached pawl i and spring c in combination with double levers n
and o all arranged and operating to force trigger m from edge of barrel F,
provided with the edge m², thereby releasing spring operating when tension is
brought upon said shackle A, substantially as described and shewn.
2. In an explosive alarm padlock, the firing device (Fig. 4) having projection
and socket o in combination with barrel f having dog g and slots 0 and p and
plunger all arranged to hold and automatically lock said firing device (Fig. 4) to
padlock, substantially as described and shewn.
cam w in
3. In an explosive alarm padlock, the shaft a rigidly attached to
combination with tumblers b, 2, 3 and trigger m all arranged so that the proper
key will open the lock without forcing trigger m from its position on edge n² of
barrel F, substantially as described and shewn.
4. In an explosive alarm padlock, the spring c² in combination with the lever n, for
the purpose specified, substantially as described and shewn.
5. In an explosive alarm padlock, the slot 12 in the firing device (Figs. 1, 4, 5)
in combination with the knob L on key (Fig. 8) for the purpose specified substan-
tially as described and shewn.
6. In an explosive alarm padlock, the combination of the shackle A plunger v
dog g, and slots o² and o³, for the purpose specified, substantially as described and
shewn.

page_text: 7. The combination of an explosive aların in conjunction with a padlock fired by
tension on the shackle and then leaving the padlock locked, substantially as described
and shewn.
Dated this 11th day of September 1897.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicant.