Improvements in Padlocks.
Year: 1891

page_text: Date of Application, 26th Aug., 1891-Accepted, 26th Sept., 1891
COMPLETE SPECIFICATION..
Improvements in Padlocks.
We, THOMAS BAILEY, of Laburnum Cottage, Willenhall, Staffordshire, Retired
Grocer, JOHN LOWE and THOMAS FLETCHER, both of County Bridge, Willenhall,
aforesaid, Padlock Makers, 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 of improvements in padlocks consists chiefly in a novel combination
and arrangement of the bolt or bolts with a certain guard plate or guard plates as
hereinafter described, whereby the security of tho lock is considerably increased,
and the said invention further consists in an improved construction and arrange-
ment of the shackle and case of the padlock.
We will describe the said invention by referring to the accompanying sheets of
drawings on which
Figs. 1 and 2 are sectional front elevations of a padlock embodying this
invention represented as locked in Fig. and unlocked in Fig. 2 ;
Fig. 3 is a cross sectional elevation of the same locked;
Fig. 4 represents the shackle of the same separately in front and side elevations,
Fig. 5 shews one of the bolts of the padlock separately;
י.
:
Fig. 6 represents one of the guard plates which are placed between the bolts as
and for the purpose hereinafter described ;. and
Fig. 7 shews a bow shackle padlock constructed according to our invention...
The same letters of reference indicate the same or corresponding parts in all the
figures.
'
Referring firstly more particularly to Figs. 1 to 6 both inclusive A' is the padlock
casing and A' is the usual cover plate of the same. The casing A is open at one
end marked a and through this opening the shackle B projects and when' unlocked
is free to be moved to and fro in the casing. The shackle B has an inwardly
projecting arm & with which, when the shackle is pushed into the case as far as the
stops will allow, the bolts C1, C2, C, Cengage as hereinafter described and
thus lock the shackle in that position. The outward movement of the shackle is
limited by the pin d engaging in the slot in the shackle as shewn in Fig. 2. The
bolts, of which the padlock illustrated in our drawing has four, marked respec-
tively CC CC (but we do not limit ourselves to any particular number), are
arranged side by side between the checks of the padlock to slide at about right
angles to the direction of movement of the shackle B. The said bolts are kept in
position by being slotted at cc and these slots engaging with the pins el c² fixed to
one of the padlock checks. Each of the bolts C C C C is shaped at c³ so as to
be moved back from the arm b' of the shackle when the key is inserted in the key
hole and turned in the right direction, and the front c of each bolt is shaped to
engage in a recess in the arm when the bolts are shot forward by their
springs as shown in Fig. 1. G' G' are two guard plates, one of which marked G¹
(shown soparately by Fig. 6) fits on the pins ele between the bolts C and C³, and
the other guard plate G³ also fits on the pins ele between the bolt C₁ and the
cover plate A. The edges of these guard plates come very near to the barrel of
the key when the key is inserted in the lock so that the bit of the key must have
notches corresponding with the guard plates or the key cannot be turned. The bit
of the key must also have projections corresponding with the bolts and of
such lengths as to withdraw all the bolts from the recess in the arm & together.
The use of the said guard plates or a single guard plate in combination with
the bolts or with a single bolt in the manner above described forms
important feature of this invention as the guard plate adds, or the guard
an

page_text: plates add, very considerably to the security of the lock. We do not limit
ourselves to the particular number of these guard plates and bolts which we
use in a single padlock nor to the positions which the guard plate occupies or guard
plates occupy relatively to the bolt or bolts, as it will be seen that by varying
either the thickness or the position or the thickness and position of the guard plate
or plates relatively to the bolt or bolts, or by using more or fewer of the guard
plates, either with the same or a different number of bolts, or with a single bolt, a
large number of the padlocks can very readily be made to differ from each other so as
not to be opened by the same key. We prefer not to use a tumbler with the bolt
or bolts, thereby making the lock more difficult to pick, because, when no tumbler
is used, it is very difficult (without using the proper key) to hold all the bolts back
simultaneously whilst the shackle is being withdrawn. The extreine end 66 of the
shackle B is by preference bevelled off as shewn so as to act upon the rounded off
ends of the bolts C, C³, C³, C' and force the bolts back by the act of pushing
the shackle into the padlock case, thereby making the padlock self locking. Or
.the bevelled off end of the shackle B may be dispensed with and the ends c¹ of
the bolts made square so that the padlock can then only be locked by first with-
drawing the bolts by inserting and turning the key.
In a modification of this invention one or more bolts such as C¹ C' C'C' is or
are used in combination with the shackle B and lock case A, A' without the
guard plate or guard plates.
The said improved arrangement of bolt or bolts and guard plate or guard plates
can be applied to other padlocks similarly as above described and with reference.to
the padlock shewn by Figs. 1 to 6 both inclusive. For instance as shewn by Fig. 7
which illustrates this part of our invention applied to a padlock furnished with an
ordinary bow shackle,
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In a padlock and in combination with the bolt or bolts thereof, the use of one
or more guard plates such as G' G' in the manner and for the purpose substantially
as hereinbefore set forth and illustrated in the accompanying drawings.
2. In a padlock and in combination, the open erded case A' A', the sliding
shackle B partly contained therein furnished with an arm b', and a spring bolt or
spring bolts such as C C C C adapted to engage with said arm 6 when in its
locked position, all substantially as hereinbefore described and illustrated by
Figs. 1, 2, 3, 4, 5 and 6 of the accompanying drawings whether the guard plate or
guard plates is or are used with the bolt or bolts or not.
3. The combination and arrangement of parts constituting the improved padlock
hereinbefore described and illustrated by Figs. 1, 2, 3, 4, 5 and 6 of the accom-
panying drawings.
4. The combination and arrangement of parts constituting the improved padlock
herein before described and illustrated by Fig. 7 of the accompanying drawings.
Dated this 21st day of August 1891.
CHARLES BOSWORTH KETLEY.
Agent for the Applicants.