Improvements in Locks or Door Fastenings.
Year: 1889

page_text: Date of Application, 28th June, 1889-Accepted, 31st Aug., 1889
VMT LEIN SPECIFICATION.
Improvements in Locks or Door Fastenings.
I, EDWARD WRIGHT, of High Street, Southend, in the County of Essex, Architect,
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 :-
In working out the invention which is the subject of my application for Letters
Patent No. 17330 dated 28th November 1888, I have found that similar results can
be secured by arrangements such as are hereinafter described in which the lock is
placed upon the door.
In my Specification 1733088 I describe various arrangements of a door fastening
having a bolt with a double incline suitably mounted for hanging on a door-frame or
casing so as to engage with a suitable catch on the door and operating in a plano at
right angles to the plane of the door when closed, in such a manner as to secure
the door but at the same time to permit the door to be opened or closed by a simple
push or pull.
Now in order that the modified arrangements which are the subject of the present
application may be clearly understood I will proceed to describe them with reference
to the annexed drawings.
Fig. 1 is a horizontal section of parts of a door-frame or casing and door with
lock applied to the door, this lock being constructed with a pivotted or articulated
bolt made to engage with a suitable catch adapted to be mounted on the door-frame
or casing. In this view the door is shewn closed and locked.
Fig. 2 shews part of the door-frame or casing in elevation and part of the door
with lock in vertical section in a plane at right angles to the plane of the door.
Fig. 3 shows a part of the door-frame or casing with the double inclined catch in
elevation.
Fig. 4 is a view corresponding to Fig. 3 but showing the door partly open.
Fig. 5 shews part of a door-frame or casing in section and part of the door in
elevation, with the lock in section, in a plane parallel to that of the door.
1. Is a lock bolt mounted on a pin or pivot 2, within a case 3 which is let in flush
with the face of the edge and that of one side of the door 4, the case being of
L section in plan. The lock bolt 1 is made with a recess 1ª to receive the end of a
locking bolt 5 that is arranged to be capable of sliding within a part of the lock
case in a direction parallel to the plane of the door. This locking bolt 5, which is
shewn clearly in Fig. 5, is constructed to be operated by a key. When it is shot it
engages with the lock bolt I and secures it in the position for fastening the door;
the catch 6 is let into the door-frame or casing 7 and is situated at such a height
that when the door is closed the cam-like edge 7 strikes against the edge 1 of the
lock bolt, lifting it so that it rises up on the edge and subsequently descends into the
position shewn in Fig. 2. This action is aided by the spring 8, or the lock bolt 1
may be so hung that its own weight serves the saine purpose as the spring 8.
It will be understood that with this arrangement of a lock attached to the door
and a catch attached to the door-frame or casing, there will be no projections beyond
the main surface of the door or of the door-frame or casing of such a character as
will bo likely to catch and tear the garments of persons passing through the
doorway.
Fig. 6 is a horizontal section of part of a door frame and door with a modification
of the construction of lock last above described, which renders the lock suitable for a
mortice lock.
Fig. 7 shews a part of a door-frame in elevation with the door and lock in vertical
section in a plane at right angles to the plane of the door.
In this modification the lock casing is of T shape in plan so that the locking bolt

page_text: is located in or about the middle of the thickness of the door through which two
key holes are provided, one at each side, in such a manner that the locking bolt can be
actuated by a key inserted either from the one side or from the other side of the
door. In other respects this lock resembles that already described with reference to
Figs. 1 to 5 inclusive.
Fig. 8 shews in elevation part of a door-frame or casing and door with another
modification of lock constructed according to my present invention.
Fig. 9 is a view similar to Fig. 8 but with the lock casing in vertical section.
Fig. 10 is a view at right angles to Fig. 9, shewing part of the door-frame or
casing in elevation and the door and lock casing in vertical section. In this view
the lock bolt is shewn engaged with the catch.
Fig. 11 shews in elevation a part of the door-frame or casing with the catch.
In this modification the lock bolt 1 instead of being pivotted is arranged to slido
vertically within a part 3 of the lock casing. The bolt is shewn as of rectangular
cross section with two of its opposite faces inclined towards one another at the upper
end. At the lower end it is formed with a cylindrical extension or stem surrounded
by a spiral spring 8 that tends normally to keep the bolt in its raised or shot
position except when depressed by contact with the inclined surface of the catch 6
attached to the door-frame or casing. There is a recess, slot or hole 1º in the lock
bolt to receive a part of the locking bolt 5 which will be seen clearly in Fig. 9 where
it is shown engaged with a lock bolt 1 which is consequently locked in its raised or
shot position.
Fig. 12 is a sectional view shewing the interior of a modification of the last
described construction of lock in which the lock bolt 1 instead of being constructed
with a cylindrical extension and kept raised by means of a spiral spring, is supported
by an arm 9 pivotted at 10 and kept up by a spring 8, one branch of which bears
against the lock casing and the other against the arm 9. In other respects this
modification of lock resembles that described with reference to Figs. 8 to 11
inclusive.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. A door fastening having a bolt with a double incline suitably mounted for fitting
on a door so as to engage with a suitable catch on the door-frame or casing in such
a manner as to secure the door but at the same time to permit the door to be opened
or closed by a simple push or pull arranged and operating substantially as herein-
before described.
2. A lock adapted to be secured to a door having a bolt arranged to slide vertically
and to engage with a suitable catch adapted to be mounted on the door-frame or
casing arranged and operated substantially as herein before described.
3. A door fastening such as described in the first claim or in the second claim, in
combination with a locking bolt or bolts to secure the lock bolt, whether such locking
bolt or bolts be operated by hand or by a key.
4. In a lock adapted to be applied to a door, the combination of a pivotted or
articulated lock bolt, adapted to engage with a catch fixed to a door-frame or casing,
and a supplementary bolt or stop adapted to lock the pivotted lock bolt when operated
for that purpose whether by a key or otherwise.
5. The several constructions of my improved lock hereinabove described with
reference to and shewn respectively in Figs. 1 to 5 inclusive, Figs. 6 & 7, Figs. 8
to 11 inclusive, and Fig. 12 of the drawings annexed.
Dated this 25th day of June 1889.
5 day of OCS.
EDWARD WRIGHT.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.