Improvements in Locks.
Year: 1896

page_text: Date of Application, 9th May, 1896-Accepted, 13th June, 1896
COMPLETE SPECIFICATION.
Improvements in Locks.
We, WILLIAM FERDINAND and EDWARD LYON both of 37, Arcadia Street,
Poplar, London, Gentlemen, 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 :-
Our invention relates to improvements in locks the object being to provide a
lock of fairly simple constraction which is more particularly intended to replace
the padlock now in general use, although it is equally suitable for other purposes,
such as for securing drawers, lids of desks and the like, when made in a smaller
size.
By means of our improved lock which is of the "mortice" kind, it can be let
into a door or the like and is not nearly so unsightly as the ordinary padlock,
and while it is almost impossible for the lock to be picked or opened, this can be
quickly and easily effected by any one possessing the necessary key.
In order that our invention may be fully understood we will now proceed to
describe same with reference to the accompanying drawings in which
Fig. 1 is a plan of the lock and frame with the top plate and the mechanism
carried by it removed.
Fig. 2 is a plan of the top plate showing the mechanism carried by it.
Fig. 3 is a sectional plan of the lock, the section being taken just below the top
plate so as to show the tumblers, springs etc. in their relative positions as regards
the locking bolt.
Fig. 4 is a plan of the locking bolt detached and Fig. 5 an end view of
same.
Fig. 6 is a side elevation of the locking bolt showing the rack.
Fig. 7 is a detached view of the locking bolt showing the tumblers in their
locking position the open position being shown in dotted lines.
Fig. 8 is a side elevation of the actuating wheel or pinion and barrel.
Fig. 9 is a plan and side elevation respectively of the locking pin or stud used
in connection with this improved lock, Fig. 10 showing the key for operating or
actuating the said lock.
Fig. 11 is a plan of a slightly modified form of lock more particularly suitable
for use in connection with drawers, desk flaps and the like.
Fig. 12 being an underside view of the top or cover.
Fig. 13 is an underside view of the pinion used in connection with the lock
shown in Fig. 11.
Our improved lock consists essentially of the frame a carrying within it the
bolt b, one end of which is furnished with three arms c, c', c², said bolt being
capable of sliding backwards and forwards by reason of the slot d and screw d²,
the forward portion of the bolt passing under the guiding strap e, while the
ends c. c', e², when in the locked position, pass into corresponding recesses in an
end plate or block f, the spring's being provided for forcing the bolt forward.
In order to operate the bolt by means of a suitable key (Fig. 10), it is furnished
at the under part of one side with a rack r as shown in Fig. 6 and as indicated by
the dotted lines in Figs. 1 and 4, a pinion p (Fig. 8) being also provided furnished
with a barrel designed to receive the end or stem of the key, said pinion
engaging with the rack r. The locking tumblers t, t', are carried by the top
plate a' and when in the closed position the ends 2, t drop behind the end g of

page_text: the locking bolt b, in such a manner that it is impossible for the said bolt to be
drawn back until they are raised, springs a', being provided for keeping them
in the closed position."
Upon the end of the key being inserted in the barrel p', the said barrel, which is
capable of revolving freely without carrying the pinion with it is caused to turn by
reason of the portion of the key engaging with the projecting pin or atud
As the key is turned the part k of same comes into contact with the curved end k¹
of the tumbler & foreing back the end t, the second tumbler t being simultaneously
forced back by reason of the inwardly projecting portion bearing against a
correspondingly curved part k³ of the tumbler t. By this means the ends t' and t
are forced back and the end of the bolt & freed, upon this stage being reached
the barrel which has made nearly a complete revolution brings the projection A¹
carried by it into contact with the pin or stud 2 carried by the pinion p so that
upon further turning the key the latter is caused to revolve and while gearing with
the rack draws back the bolt b.
In order to employ our improved lock for the purpose of securing a door, the
latter is preferably furnished with a cross-bar of suitable shape and strength let
into sockets or the like in the sides of the door. This cross-bar is formed or
provided with a square hole or perforation which, when the locking bar is in
position exactly coincides with the opening o in the top plate. A locking stud or
pin such as m (Fig. 9) is then passed through the bar and also passes through the
opening o of the top plate and a corresponding opening o' in the cross strap e and
enters the body of the lock, so that upon the bolt b, which has been previously
drawn back by means of the key, being released, the said bolt is forced forward
by springs, the central limb or arm c¹ passing through the opening or
perforation o of the locking pin m effectually securing it in position and
preventing it from being withdrawn until the lock has been opened by means of
the key.
Figs. 11, 12 and 13 illustrate a slightly modified form of lock which is made
in a much smaller size and particularly suitable for use in connection with
desks, drawers or the like. This lock is essentially the same as the larger
one hereinbefore described, there being merely slight modifications in the
construction.
In this case it will be seen that the rack r is formed upon the top of the bolt
while the tumblers t, are arranged below the bolt as shown instead of being
carried by the top plate and resting upon the top of the bolt b as in the former
case, a spiral spring being also used to replace the spring a of the larger lock,
while the barrel of the actuating pinion p' is furnished with a covering plate p
designed to pass over and close the lower part of the key hole after the key has
been inserted and turned a short distance so as to prevent a wire or the like being
inserted.
In either case a flat spring a may be provided which bears under the end ¹
of the locking pin ma so that after the latter has been released by drawing back
the bolt b the said spring raises it or forces it up a sufficient distance so as to allow
of it being readily removed.
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. The new or improved lock consisting essentially of the bolt & furnished with
rack in combination with the actuating pinion p and its parts p, k³, k²,
tumblers t, and springs a, a, s, the whole combined arranged, and operating
substantially as herein described and shown and for the purposes specified.
2. In combination with a lock such as above claimed the special form and
arrangement of the tumblers t, t' substantially as herein described and shown and
for the purpose specified.
3. In a lock such as above claimed the bolt b with rack r, pinion p with loose

page_text: barrel pl and pins or projections h¹, h³, substantially as herein described and shown
and for the purposes specified.
4. In combination with a lock such as above claimed the locking pin m having
opening or perforations of substantially as herein described and shown and for the
purpose specified.
5. The new or improved lock and the modified form of same substantially as
herein described and shown and for the purposes specified.
Dated this 20th dose of Ammil 1906
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.