An Improved Padlock.
Year: 1889

page_text: Date of Application, 31st Jan., 1889
Complete Specification Left, 10th Oct., 1889-Accepted, 23rd Nov., 1889
ROVISIONAL DI VITTUATIO
An Improved Padlock.
I, LAWRENCE EDMUND GREEN, of St. Ann's Road, Willenhall, Staffordshire, Lock
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention consists of the improved padlock herein described and which is con-
structed as follows :-
The shackle is by preference of n-form one leg being longer than the other. The
long leg is secured in the top of the padlock casing so that the shackle can be
turned round this leg as an axis. When the padlock is locked the free end of the
shackle closes against an upwardly projecting part of the casing the end of the
shackle and the top of this projecting part being by preference halved together.
That part of the axis of the shackle which is within the padlock is by preference
made square and the end of the bolt has a gap or is otherwise formed so as to
engage with the said square part of the axis when the padlock is locked and thus
prevent the shackle being turned round upon its longer leg to open the lock; or
instead of the said part of the axis being square it may for the same purpose be made
with flats or to be provided with a hole or otherwise formed for the end of the bolt
to engage with.
Within the lock casing I sometimes provide a spring which acts upon the axis of
the shackle and causes it to turn and fly open immediately the bolt of the lock is
withdrawn; and I sometimes provide a spring to act upon the bolt to shoot it towards
the axis of the shackle to engage therewith immediately the shackle has been turned
into its locked position thus making the lock so that it can be locked without the use
of a key.
The padlock casing is by preference made from cast metal with a loose front plate as
usual, a circular hole (half in the casing and half in the plate) being provided for part
of the longer leg of the shackle to turn in, this part of the leg being made round for
that purpose.
Instead of the shackle being -shaped it may be like an inverted letter L or of
other shape which constitutes an axis and a projecting arm.
Dated this 29th day of January 1889.
COMPLETE
SPECIFICATION.
An Improved Padlock.
I, LAWRENCE EDMUND GREEN, of Saint Ann's Road, Willenhall, Staffordshire,
Lock Manufacturer, 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 consists of the improved padlock herein described and which is con-
structed as follows:-
The shackle is by preference of n-form one leg being longer than the other. The
long leg is secured in the top of the padlock casing so that the shackle can be turned
round this leg as an axis. When the padlock is locked the free end of the shackle
closes against an upwardly projecting part of the casing the end of the shackle and the
top of this projecting part being by preference halved together.
That part of the axis of the shackle which is within the padlock is by preference
made square and the end of the bolt has a gap or is otherwise formed so as to engage
with the said square part of the axis when the padlock is locked and thus prevent the

page_text: shackle being turned round upon its longer leg to open the lock; or instead of the said
part of the axis being square it may for the same purpose be made with flats or be
provided with a hole or otherwise formed for the end of the bolt to engage with.
I sometimes provide a spring to act upon the bolt to shoot it towards the axis of the
shackle to engage therewith immediately the shackle has been turned into its locked
position thus making the lock so that it can be locked without the use of a key.
The padlock casing is by preference made from cast metal with a loose front plate
as usual; a circular hole (half in the casing and half in the plate) being provided for
part of the longer leg of the shackle to turn in, this part of the leg being made round
for that purpose.
Instead of the shackle being n-shaped it may be like an inverted letter ☐ or of
other shape which constitutes an axis and a projecting arm.
On the accompanying drawing Fig. 1 represents in front elevation, and Fig. 2 in
side elevation, a padlock constructed according to this invention, and Fig. 3 is a front
view and Fig. 4 is a plan of the same unlocked; Fig. 5 represents in front and side
elevations, and in plan, the shackle part of the same separately; Fig. 6 represents in
front and side elevations, and in plan, the bolt of the same separately; Fig. 7
represents in front elevation and in plan one of the levers of the same separately;
Fig. 8 is a front view and Fig. 9 is a sectional plan of the same padlock with the
front plate removed so as to shew the internal mechanism in the positions which the
parts occupy when the padlock is locked; Fig. 10 is a front view and Fig. 11 a
sectional plan with the front plate removed of the same padlock shewing the parts in
the positions which they occupy when the padlock is unlocked; Figs. 12 and 13
represent in front elevation and Fig. 14 in plan a modification of my invention the
same being represented as locked in Figs. 12 and 14, and as unlocked in Fig. 13.
The same letters of reference indicate the same or corresponding parts in all the
Figures of the drawings.
a is the padlock casing and b is the front plate of the same. c is the shackle and c¹
is that part of the longer leg of the same which is made round and forms the axis on
which the shackle turns this part c¹ fitting in the circular hole a¹ (half in the
casing a and half in the front plate b) the internal collar being provided on the
shackle c to prevent the shackle being withdrawn. a² is the upwardly projecting part
of the casing against which the free end c of the shackle closes when the padlock
is locked; this upwardly projecting part a² may have a recess a³ as shewn into
which the reduced end of the shackle fits. d is the bolt of the padlock which is
continually pressed towards the longer leg of the shackle by the spring e acting upon
its end d¹, the bolt being guided by the pins f and g. d² is the gap formed in the
end of the bolt d to engage with the rectangular shank e of the shackle when the
padlock is locked. The example illustrated is a lever padlock, ¹² being the levers
turning on the pin and lifted by the key i in locking the padlock.
Each lever is
provided with a spring ; which takes against the pin and continually forces the
outer ends of the lever downwards, so that when the padlock is locked as shewn in
Fig. 8 the outer ends of the levers will engage with a projection d³ on the bolt and
thus maintain the bolt in its locked position until the levers are lifted in unlocking
the padlock.
To unlock the padlock the key i is inserted in the keyhole and turned through a
certain distance so as to first come into contact with the levers ¹³ as shewn by
Fig. 8 and lift them as shewn by Fig. 10, the key then comes into contact with a
lower projecting part on the bolt d and forces the bolt sideways until the slotted
end d has been withdrawn from the lower part c of the shackle, as shewn by
Fig. 10, the projecting part d³ of the bolt meanwhile entering slots in the levers.
The shackle is now turned outwardly on its axis towards the front of the padlock as
shewn by Figs. 3, 4 and 10 and by the dotted lines in Figs. 2 and 11. The key
can now be removed as the bolt will be maintained in the position shewn by Figs. 10
and 11 by its end coming into contact with the wider side of the shackle e To
lock the padlock it is only necessary to turn the shackle round to a position
parallel with the padlock casing as shewn by Figs. 1, 2 and 8 when the spring e will

page_text: force the bolt sideways and cause its slotted end d² to engage with the lower part o
of the shackle c and thus maintain the shackle in its locked position. The padlock is
thus self-locking the key only being required to unlock the same.
In the example illustrated by Figs. 12, 13 and 14 the shackle c instead of being
made-shaped, is made like an inverted letter L so as to take against the upwardly
projecting part a formed with the lock casing a.
The accompanying drawings illustrate what I have found to be the best way for
carrying my invention inte effect but it is to be understood that my said invention is
not limited to the precise details illustrated as the same may be varied without
departing from the nature of this invention, as for instance, the form of the bolt d and
the internal mechanism for maintaining the bolt in its locked and unlocked positions
may be arranged in other ways as commonly used with other kinds of padlocks as will
be readily understood.
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. In a padlock and in combination with a padlock case, a shackle of U or shape,
or approximately of U or L shape, one leg of the said shackle being secured in the
said case to form an axis about which the shackle can be turned to stand either out-
wardly from the case or in a plane about parallel therewith, and means for locking that
leg in the enclosing case, substantially as described.
2. In a padlock and in combination with a padlock case, a shackle of U or L shape,
or approximately of U or ☐ shape, one leg of the said shackle being secured in
the said case so as to form an axis about which the shackle can be turned to stand
either outwardly from the case or in a plane about parallel therewith, and means for
automatically locking that leg in the enclosing case substantially as described.
3. In combination with the case 6 the shackle e secured thereto so as to be capable
of turning axially on one leg and means for locking that leg in the enclosing case
substantially as described.
4. The combination of parts constituting the improved padlock arranged and
operating substantially as herein before described and illustrated by the accompanying
drawings.
Dated this 9th day of October 1889.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.