Year: 1897

page_text: WH
I, JOHN ARCHIBALD. Cox of 11, South Street, South Helter, Sunderland,
Gentleman, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved lock for use with doors, gates and the like,
and has for its object to provide an arrangement of lock which can be unfastened
only at the side from which it has been locked.
The lock is formed with a double bolt, this double bolt being contained in the
latch, which is formed with a passage allowing the double bolt to pass through.
The central portion of the latch is cut away, and the case is provided with a
dividing plate passing between the two portions of the bolt. This dividing plate
is formed with a perforation into which the end of the key takes after it has passed
through the key hole in the case. Owing to this dividing plate one portion of the
bolt can be operated only by a key passing through the case at its under side, so that
after once having been shot the bolt cannot be withdrawn by an operation from the
other side, one section of the bolt only being employed at one time. The bolts are
operated by the usual mechanism which is in this case made double.
A cover.
plate is provided for the lock which is screwed in place and is formed with a key
bole similar to the face. This arrangement is especially applicable to room doors
so that on entering a room the door can be locked without any danger of its being:
opened from the outside.
Dated this 26th day of February 1897
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.
I, JOHN ARCHIBALD Cox of 11, South Street, South Helter, Sunderland,
Gentleman, 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 relates to an improved lock for use with doors, gates and the like,
and has for its object to provide an arrangement of lock which can be unfastened
only at the side from which it has been locked.
The lock is formed with a double bolt, this double bolt being contained in the
latch, which is formed with a passage allowing the double bolt to pass through.
The central portion of the latch is cut away, and the case is provided with a
dividing plate passing between the two portions of the bolt. This dividing plate
is formed with a perforation into which the end of the key takes after it has passed
through the key hole in the case. Owing to this dividing plate one portion of the
bolt can be operated only by a key passing through the case at its under side, so that

page_text: after once having been shot the bolt cannot be withdrawn by an operation from the
other side, one section of the bolt only being employed at one time. The bolts are
operated by the usual mechanism which is in this case made double. A cover
plate is provided for the lock which is screwed in place and is formed with a key
hole similar to the fare. This arrangement is especially applicable to room doors
so that on entering a room the door can be locked without any danger of its being
opened from the outside.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings, in which Fig. 1 is a front view of the lock
with the cover plate removed, and Fig. 2 is a cross section.
The lock is provided with the usual latch A carried in the case B and operating
in the ordinary manner with the spring a. This latch is formed with a central
passage or hole passing through it longitudinally carrying the bolts C both of
which are of the same form, but adapted to work independently. The latch is cut
away at a¹ so as to expose the double bolt or bolts and allow them to be operated.
A dividing plate D is placed between the bolts and separates them. The case is
provided with a key hole bat each side, and the dividing plate is formed with the
perforations d into which the end of the key can take after it has passed through
a key hole.
The key can thus actuate only that bolt or section of the bolt which
is at its under side, the arrangement consisting practically of two locks entirely.
independent of each other with the exception of the latch, which is common to
both parts.
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.) Improvements in locks consisting in providing a double bolt, a dividing
plate separating the two parts of the bolt, and independent mechanism for
operating each portion of the bolt, substantially as described and for the purposes
specified.
(2.) In an improved lock for doors and the like, the combination with a hollow
latch, of a double bolt placed within the said latch, a dividing plate between the
two parts of the bolt, and mechanism adapted to operate each part of the bolt
independently, substantially as and for the purposes specified.
(3.) In an improved lock for doors and the like, the combination with a latch
having a central passage and a central portion cut away, of a double bolt placed
within the latch each part adapted to slide independently in the same, a dividing
plate passing through the latch and separating the two parts of the bolt, and
mechanism at each side of the lock operating each part of the bolt independently
of the other, substantially as, and for the purposes specified.
(4.) The improved lock for doors and the like, consisting of two independently
working bolts actuated by suitable mechanism, substantially as described and shown
in the accompanying drawings and for the purposes specified.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.