Year: 1892

page_text: Date of Application, 7th Apr., 1892-Accepted, 28th May, 1892

page_text: These two results are obtained in the following manner :-
The pistons, forced outside by the key, move against the curved surfaces of a
plate I oscillating on an axis f and having as a continuation a part J hinged
thereon.
When
The oscillating movement of the plate compresses the counter spring K which
brings it back against a catch g. The piece J has, on its lower face, a kind of
cap which engages with a projection forming a part of the large bolt.
the lock is closed, one of the branches of the cap is lowered behind the pro-
jection and forms a stop or catch preventing the lock being opened.
When opening the lock by means of the key from the outside, one of the pistons
causes the plate to oscillate, and the projection i comes beside the hollow of the cap
and may slip freely past during the return of the bolt.
In order to open it from the inside by turning the knob B, the hinged part.J must
first be raised. For this purpose, this part is pushed by means of a knob L fitted
with a counter spring j, which brings the whole into its position with the opening
of the lock.
The small bolt is operated by the action of one of the pistons, which, in its
rotation, engages the three-branch cam m. When the key is withdrawn, the piston
returns on itself and no longer touches the cam, and then the bolt pushed by the
spring K resumes its former position.
A spring strip N serves to retain the cam in such a position as it may always be
operated by the piston.
It will be seen that, with this arrangement of lock, the two bolts, although
independent one of the other when the key is withdrawn, are opened simultaneously
with a third turn of the key only.
Further, this latter is introduced or withdrawn into any of its positions without it
being necessary to turn it in order to find the entrance or the exit, which makes its
use eminently practicable.
Figures 9 and 10 show clearly the construction of the key which is made
mechanically.
It may be further noted that the grooves with which it is furnished present a
certain inclination which may be varied ad infinitum in such a way as to obtain all
possible combinations.
It is needless to state that, in order to allow of a lost key being easily replaced,
each one bears a number which is reproduced on the bottom of the corresponding
lock.
The catch or staple, which is shown in Figures 3 and 4, has two drilled holes OP,
to allow the passage of a strong screw which firmly connects it with the door post.
When the lock is intended to connect simultaneously several bolts, the cylinder a
is connected with the pinion Q, Figure 5, which actuates a rack bar R.
This rack transmits the movement to the various bolts.
If it be desired to open the lock from inside with a key, in place of using the
knob B, its construction may be slightly modified. As shown in Figures 6 and 7,
the opening for the key has a pinion S, which actuates directly the large bolt, a
part of which has teeth in the form of a rack T. Further, the plate J has a peg 1,
against which the key, when introduced, strikes in order to raise the said plate and
release the bolt.
Figure 8 shows an example of the application of this system to locks for furniture,
and in general to those which have only one bolt.
In this case, only one cylinder c is requisite, which, on the insertion of the key,
is pressed outward, thus forcing up the plate J, thereby allowing the pin or
projection on the bolt E to traverse the slot in the plate J. To keep the plate J
depressed, a spring K is provided.
The bolt E being released, the lock may be closed by the rack and pinion
arrangement.
This system may be also applied to padlocks, and, in a general manner, to all
kinds of fastenings.

page_text: 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 a safety lock, a cylinder a having two pistons, capable of being actuated by
a conical key, in combination with a hinged plate in two parts I J, a rod F for
actuating the large bolt, a cam m for actuating the small bolt, the entrance hole G
with its casing of hardened steel, a spring pusher L and the counter springs K K,
all arranged substantially as hereinbefore described and shown.
2. In a safety lock such as described in Claim 1, the employment, in connection
with the cylinder a, of a toothed pinion Q for actuating a rack R in order that the
lock may simultaneously operate several bolts substantially as described as regards
Figure 5 of the accompanying drawings.
3. In a safety lock such as described in Claim 1, the replacement of the knob B,
Figure 2, by a key hole having a toothed pinion S in combination with a rack T of
the main lock and a peg 1 fixed on the plate J in order to allow of the lock being
opened or closed from the interior by means of a key substantially as described with
reference to Figures 6 and 7 of the accompanying drawings.
4. The application of the hereinbefore described improvements to locks for
furniture, padlocks, etcetera, where there is only a single bolt, substantially as shown
on Figure 8 of the accompanying drawing.
Dated this 6th day of April 1892.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.