Year: 1886

page_text: Date of Application, 5th June, 1886
Complete Left, 4th Mar., 1887.
Complete Accepted, 4th June, 1887
JAMES HOOKHAM 5 Gildredge Road Eastbourn Sussex Builder do hereby declare
the nature of this invention to be as follows:
That the Drawing fig. I showing lock with top Plate off, Letter A showing Catch
or Bolt made of one Piece of Metal from Letter B to B. Letter C showing tumbler
which is worked by a knob or handle which thrown forward, by the turning of the
handle and drawn Backward, by a spring made of metal or india-rubber at lotter D.
Letter E showing two tumbler which is worked by a key, and when locked outside
cannot be unlocked from the inside and when locked from the inside cannot be unlocked
from the outside. Drawing Fig. II showing lock with top Plate off, simalar to Fig. I.
Letter F showing Catch or Bolt made reversable for Left or right Hand Locks Fig. III
showing section of Lock and shape of Bolt.
n
11 1
T
1000

page_text: I JAMES HOOKHAм of 5 Gildredge Road Eastbourne, Sussex Builder do hereby
declare the nature of my Invention for IMPROVEMENTS IN LOCKS AND LATCHES and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This Invention has for its object improvements in locks and latches and consists in
a novel method of locking whereby locks constructed according to my invention
cannot be unlocked from the inside when such locks have previously been locked from
the outside or vice versa.
It is effected by independent key-holes and tumblers or their equivalents which may
be worked by Keys that are alike or different as the case may be. The key-holes are
at different levels and are not continued through the lock by which means it is
impossible for anyone seeing into a compartment where locks of this construction are
used.
I will now proceed to describe my Invention with reference to the accompanying
drawings in which Fig. 1. is an clevation of the lock with the one cover removed and
Fig. 2. is a front elovation. The novel features of my invention will be clearly seen
with reference to Fig. 1. in which a is the framing of the lock containing the .catch b
and with it its frame 6 enclosing the tumblers c and d respectively of the inner and
the outer locking devices. This locking arrangement when turned back for example
with c to the position shown in the dotted lines and in the position shown by d the
framing 6 and its catch b can be brought back in the ordinary manner to the indicated
position by the ordinary handle and double tappet arrangement shown at e Figure 1.
The lock frame b¹ is kept in its normal position by means of the spring / but this
method may be varied to meet requirements.
The key-hole for the tumbler C is from the one side as shown at A Fig. 2, and
that for the tumbler d is from the keyhole, the centre line of which is shown at B
Fig. 2. It will thus be seen that by locking on the inner side the unlocking cannot
be effected from the outside neither is there any possibility of picking the lock.
I do not confine myself to the exact details shown in the drawings as they may be
considerably modified or arranged to suit particular requirements and the Koys and
Tumblers may be provided with wards or other safety arrangements.
At g Fig. 1 I have shown a reversible bolt which by being pulled out and turned
round in the manner shown at Fig. 1ª causes these locks to be adapted to either right
or left hand doors or in any manner required or the latch may be pressed inwards and
similarly reversed.

page_text: Although I have shown in the drawings what is known as a mortice lock I would
have it understood that my improvements are applicable to all kinds of locks and
latches.
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 :-
:-
First. In locks and latches the employment of two tumblers worked independently
of each other substantially in the manner and for the purposes herein set forth.
Second. In locks and latches providing the key-holes in such manner that thoir
openings are not opposite each other as herein set forth.
Third. The general arrangement and method of working locks of the type herein
referred to or for reversible bolts or latches and described with reference to the
accompanying drawings.