An Improved Lock for Use in Fastening Sliding Doors and Windows.
Year: 1897

page_text: Date of Application, 26th Jan., 1897
Complete Specification Left, 5th May, 1897-Accepted, 5th June, 1897
PROVISIONAL SPECIFICATION.
An Improved Lock for Use in Fastening Sliding Doors and
Windows.
I, ARTHUR BARKER, of Morven Grove, Tithebaru Road, Southport in the
County of Lancaster, Lock Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object the construction of a lock for use in fastening
all kinds of sliding doors and windows, (including those of show cases and the like)
in which the bolt may be moved by the action of the key in a plane at right angles
to the plane of the door or window to which the lock is fixed, so that the head of
the bolt may enter a staple or locking plate fixed against the face or edge of an
adjacent sliding door or window over or up to which the door or window to which
the lock is fixed is moved to close it, or against the corresponding face or edge of
the door or window frame.
A lock constructed according to this invention has a plate which in use is let in
flush with the back face of the sliding door or window, and which is fitted with a
bolt of which the head passes through such plate, and of which the shank is
formed at an angle with the head and is pivoted at its outer end to the back of the
plate, or of which the shank is formed to slide in suitable guides in a direction at
right angles to the plane of the plate. When the head of the bolt is formed at an
angle with the shank thereof, as is preferred, it is preferred also to form the head
of a curved shape longitudinally, the lines of the curves being struck from the
pivot centre of the bolt, as thus the opening through the plate through which the
bolt head passes needs to be only of the depth of the bolt head. A barrel having a
spiral slot cut in the exterior surface thereof, or a spiral flange formed around such
surface, is mounted within a bridle or case so as to be capable of being turned
around its axis, which is at right angles to the plane of the plate. A
projection from the bolt engages with the spiral groove of the barrel, or the spiral
flange of the barrel engages with a notch of the bolt, so that when the barrel is
turned the head of the bolt is moved inwards or outwards according to the direction
of rotation of the barrel. A keyhole is formed through the outer or back plate of
the bridle or case, and the barrel is formed so that when the key is passed through
the keyhole the bit thereof engages with the barrel, and the latter may be turned
by turning the key. The turning of the barrel one revolution moves the bolt head
its full distance in either direction. The movement of the barrel is stopped, in
each direction, on the completion of an entire revolution, by a stopped end of the
groove, or a stop on the end of the flange, coming against the projection of the
bolt, or against a portion of the bolt adjacent to the notch thereof, as the case may
be; and the barrel is prevented from turning accidentally by means of a spring
end beut into a V-shape which engages with a V-shaped notch in the surface of the
barrel. The outer end of the bridle or case within which the barrel is contained
is, preferably, made round in shape for convenience in fixing.
.
According to a convenient arrangement, a cylindrical ward may be fixed to the
plate first abovementioned, and the barrel be placed around this ward, the end of
the barrel which is adjacent to the plate being formed to be a turning fit there-
around. The ward is made somewhat shorter than the barrel so as not to extend

page_text: to the front thereof, and the portion of the barrel which extends beyond the ward
is formed with a notch with which the bit of the key engages to turn the barrel.
The wards may be varied in construction to give any variation which may be
required in a suite of locks.
Dated this 25th day of January 1897.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.
An Improved Lock for Use in Fastening Sliding Doors and
Windows.
I, ARTHUR BARKER, of Morven Grove, Tithebarn Road, Southport in the
County of Lancaster, Lock Manufacturer, 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 has for its object the construction of a lock for use in fastening
all kinds of sliding doors and windows, (including those of show cases and the like)
in which the bolt may be moved by the action of the key in a plane at right angles
to the plane of the door or window with which the lock is used, so that the head
of the bolt may enter or pass across the face of a staple or locking plate fixed
against the face or edge of an adjacent sliding door or window (or window sash)
over or up to which the door or window (or window sash) to which the lock is fixed
is moved to close it, or against the corresponding face or edge of the door or
window frame.
In order to avoid unnecessary description I will proceed at once to describe a
convenient application of the invention by reference to the drawings herewith, of
which
Figure 1 is a side elevation of a lock constructed according to this invention,
with the case hereinafter described in section, and shews also a section of a portion
of a sliding door to which the lock is fixed and an edge view of a portion of a
sliding door which carries a plate or staple across which the bolt head passes when
in its locked position.
Figure 2 is a corresponding view to Figure 1, but shews the entire lock in
section, with the key in position.
Figure 3 is a detached front view of the lock, with the case shewn in transverse
section; and
Figure 4 is a plan view of the adjacent sides of the two sliding doors shewn by
Figures 1 and 2, with the lock and staple or plate applied thereto, respectively.
In Figure 1 the bolt of the lock is shewn in its unlocked position, and in
Figures 2, 3 and 4 is shewn in its locked position.
A plate A is fixed against the back face of the sliding door B. A bolt C,
formed with a head a, and a shauk b at an angle with the head, has the upper end
of the shank pivoted between lugs c which project from the inner face of the
plate A. The head a of the bolt passes through a hole formed therefor through
the plate. It is preferred to form the head a of a curved shape longitudinally,
the upper and lower curves being struck from the pivot centre of the shank b, as
thus the opening through the plate through which the bolt head passes needs to be
only of the depth of the bolt head, though it may be conveniently made somewhat
deeper, as shewn, to avoid the need for accuracy which would otherwise be required
in fitting the head within the hole. A barrel D, having a spiral slot d cut in the
exterior surface thereof, as shewn, is mounted upon a cylindrical stud or stump E

page_text: which projects from the inner face of the plate A, and the barrel D is capable of
being turned axially by means of the key. A projection e from the inner end of
the bolt head engages with the spiral groove d, and thus when the barrel is turned
axially the head a of the bolt is moved inwards or outwards, according to the
direction of rotation of the barrel. The barrel is surrounded by a case or nozzle F
which is conveniently riveted to the plate A, by means of rivets which project
from the inner edge of the case; or the case may be fixed to the plate by screws.
This case is formed with a slot f along its upper side to receive and guide the
lower portion of the bolt head. The outer end of the case F is closed in by a cap
or plate 9, and a key-hole is formed through such plate. A plate G is shewn to
be fixed to the edge of a sliding door H across the face of which the sliding
door B may be moved when unlocked, or which may be slid along behind the
door B when the lock is unlocked. When the lock is unlocked, as shewn by
Figure 1, and the key J (shewn by Figure 2) is turned over to the left, the bolt
head is moved out into its locked position shewn by Figures 2, 3 and 4, and coming
across the face of the plate G securely prevents either the door B or the door H
from being moved. A complete revolution of the barrel D is required to move the
bolt head out to its full extent, and thus when the bolt is fully moved out the key
can be withdrawn through the key hole. The key may be made of any convenient
form for engagement with the barrel D. According to the arrangement shewn for
the purpose, a drill pin i projects from the centre of the stud E, over which the
pipe of the key is passed, and a notch k is formed in the forward edge of the
barrel D to receive the bit h of the key. The movement of the barrel at each
end of its revolution is stopped by an end of the groove coming against the pro-
jection e.
The barrel D is prevented from turning accidentally by means of a
spring K which is fixed to the plate A at one end and is bent at its other end to
a V-shape, as shewn by Figure 3, and by means of a V-shaped notch in the surface
of the barrel, with which the V-shaped end of the spring engages.
While it is preferred to construct the bolt C as shewn, and to pivot it to the
plate A of the lock, it will be obvious that the bolt head a may be formed to slide
in horizontal guides, in lieu of being formed with a shank b at an angle therewith
and of being pivoted to the plate A.
In lieu of forming a spiral groove around the barrel D and a projection e from
the bolt to engage with such groove, a spiral flange, or worm, may be formed
around the barrel and engage with a notch of the bolt.
Any suitable means, such as are now used in lock mechanism, for minimising
the risk of the lock being unlocked by the wrong key, may be employed, if
desired, such for instance as wards fixed to the outer end of the stud E or
nozzle F.
The invention has been described more specifically as applied to a sliding door,
but its application to the case of sliding windows will be obvious without need for
further description. It will be obvious, also, that in lieu of fixing a plate G to the
edge of the hinder door or window (or window sash), a plate may in some cases be
fixed to the outer face thereof, and the bolt head be caused to enter a hole formed
in such plate. In some cases it may be found convenient to fix one wing of an
angle plate to the edge of the hinder door or window (or window sash) and to cause
the bolt to enter a hole formed in the other wing thereof.
In some cases, also, (such as when a single sliding door is used) a plate, to
receive the bolt when it is shot out, is fixed to the frame.
It will be seen also that the lock may in some cases be fixed to a portion of the
frame instead of to a sliding door or window.
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. A lock, for use in fastening a sliding door or window, in which the bolt is

page_text: thrown out by the action of the key in a plane at right angles to that of the door
or window with which the lock is used; substantially as described.
2. In a lock, for use in fastening a sliding door or window, the combination of,
a. plate for fixture to the joinery, a bolt which is capable of moving in a plane at
right angles to that of the door or window with which the lock is used and which
passes through a hole formed therefor in the plate, a barrel mounted upon a fixed
axis and having a spiral groove or worm formed therearound which engages with
the bolt, the said barrel being adapted to be operated by a key, and a case or cap
which closes in such barrel and has a key-hole formed through its outer face, all
substantially as described.
3. In a lock, for use in fastening a sliding door or window, the combination of, a
plate for fixture to the joinery, a bolt having a shank which is pivoted to the plate
and a head which passes through such plate, and means by which such bolt
may be shot out and drawn back by a key which is used with its axis in position
at right angles to the plane of the plate, substantially as described.
4. In a lock, for use in fastening a sliding door or window, the combination of,
a plate, such as A, for fixture to the joinery, a bolt, such as a, having a shank
formed at an angle with the head and pivoted to the plate, and a barrel, such as D,
formed with a spiral groove or worm therearound with which the bolt engages and
by means of which as the barrel is turned by a suitable key the bolt head is moved
through a hole formed therefor through the plate, all substantially as described
and shewn by the drawings herewith.
5. A lock, for use in fastening a sliding door or window, constructed and
operating substantially as described and shewn by the drawings herewith.
Dated this 4th day of May 1897
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.