Year: 1898

page_text: I, THOMAS BARKER, of 17, Clifton Street, Stretford Road, Manchester, in the
County of Lancaster, Joiner and Builder, do hereby declare the nature of this
invention to be as follows:-
-
My invention relates to locks or latches for dustbin or other doors for effectually
securing the same and preventing unauthorized persons from tampering therewith
and in the case of dustbins preventing the contents from being disturbed and
thereby causing a nuisance.
My invention consists in a drop latch actuated by means of a key and is enclosed
in a case which is fixed to the door. The latch or lock is formed of a short lever
one end of which is pivoted to the case and the other end which projects beyond
the case is free to move up and down and is bent to fit into the staple.
The staple is in the form of a box one side of which is partly cut out to allow the
case of the lock or latch to fit therein.
On the interior of this box is fitted a short pin over which the end of the lever
works and thus securely fastens the door.
The outside of the lock or latch is formed with a projection which fits close up
to the staple and prevents any thin instruments from being inserted for the
purpose of lifting the latch.
The key is formed of a piece of round iron with a short piece hinged at one
end which when inserted into the keyhole drops down and forms a lever for lifting
the latch thus opening the door, or the lock or latch may be formed with wards.
The lever may be formed also to shoot forward through the box or staple into
the door frame for additional security.
Toted this Twenty-fourth day of Mar A D 1898
Improved Loek or Latch.
I, THOMAS BARKER, of 17, Clifton Street, Stretford Road, Manchester, in the
County of Lancaster, Joiner and Builder, do hereby declare the nature of this
invention and in what manner the saine is to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention relates to locks or latches for dustbin and other doors and consists
in an improved arrangement or construction of said locks or latches the object
of my invention being to effectually secure said doors and prevent unauthorised

page_text: persons from tampering therewith and in the case of dustbins prevent the contents
from being disturbed and thereby causing a nuisance.
On the drawing appended hereunto my improved lock is represented,
Figure 1 showing an elevation as seen from the inside of the lock, Figure
vertical section and Figure 3 a plan view.
a
Figure 4 shews a modification of the lockbolt and Figure 5 the key used for
the lock.
The improved lock is a latch lock actuated by means of a key the latch being
preferably so arranged that it forms at the same time a bolt which can be shot
forward into a mortice or its equivalent to further secure the door.
Referring to the drawing, the lockcase a is closed all round except on the
side fixed to the door where it may be open with the usual slot for the bolt, or
latch 6 to work through. This latch bolt is pivotted on a stud c passing through
a slot in the latch b so that the latter is capable of longitudinal movement.
The other end of the latch projects beyond the lockcase a and is cranked as
shewn on the drawings, the cranked part being formed with a projection 6¹
or its equivalent to fit over the bar d' of the staple, and an extension 62 to engage
into a mortice e in the door jamb.
The staple is in the form of a box d screwed to the door jamb, one side d²
of which box is partly cut out to allow the lock case a to fit therein. Inside the
box d is fitted a bar or pin d' over which the end 6 of the latch drops and thus
secures the door.
To lift the latch and shoot it forward or back I employ a key f formed as
represented by Figure 5 of a round stem to which the bit f' is hinged. The
lock is formed with a tubular key hole h fixed to a cross plate h¹ which prevents
the insertion of bent wires for opening the lock. When the key is inserted into
the key hole, the hinged bit drops down into the position shewn on Figure 2,
being assisted thereto by the dished part i on the lock case, and acts on the
latch like the ordinary key bit. By turning the key so that it acts on the
side m of the notch in the latch 6 the latter is shot forward so that the end b²
enters the mortice e in the door jamb and locks the door like an ordinary bolt
lock, while at the same time the projection. 6¹ seizes over the bar d' and latches
the door. By turning the key in the reverse direction it acts first on the side n
of the notch and draws the bolt back, and by further turning it encounters the
underside o of the latch and lifts it, when the door can be opened.
To secure the latch or bolt 6 in its positions when shot forward or back, notches
may be formed in the underside of the latch as shewn on the modified form of
latch represented by Figure 4. The notches p and p¹ in the underside of the
latch bare formed with inclined sides so that when the latch or bolt is shot
forward from the position shown on the drawing, the edge of the slot in the front
plate a¹ of the lock cases causes the latch to lift till the bolt has been shot, when
the notch drops over the edge of the slot and prevents the latch from moving
back till the key is turned in the opposite direction.
Instead of using deep notches with inclined sides for the purpose aforesaid,
small rectangular notches r seizing over the edge of the slot in plate a¹ may
be used as indicated in dotted lines on Figure 1 and the key notch made shallower
so that the key acting against the top of the notch lifts the latch sufficiently to
liberate it.
Instead of the key notch in the latch on bolt being formed with curved sides
as shewn on the drawings, it may be formed with square sides for the key to act
upon as in ordinary bolt locks.
The lock may be formed with wards and the key with corresponding slits.
In some cases I hinge the latch on a pivot c without forming a slot c¹ in the
latch or projection 62 so that the lock is a simple latch lock without sliding the
latch.
To prevent the latch being lifted by unauthorised persons by means of knives
or other instruments, I attach to the lock case an outer guard a' of angle iron

page_text: or otherwise rectangularly projecting piece, and two projecting plates a² and a³
above and below the latch 6, which effectually prevent the insertion of any thin
instrument for the purpose of lifting the latch."
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:-
1. In locks or latches the combined arrangement of an encased staple, guards,
and tubular keyhole for the purpose of preventing the lifting of the latch by
other means than a key with hinged bit, substantially as herein before described
and illustrated.
2. In locks or latches the arrangement of a sliding latch serving also as a bolt
substantially as hereinbefore described and illustrated by the drawings.
3. The construction or combination of the parts of a lock or latch substantially
as hereinbefore described with reference to Figures 1 to 3 of the drawings.
4. The modified construction of the latch described with reference to Figure 4
of the drawings.
Toted this 24th dow of February 1899
R. J. URQUHART, C.E.,
Chartered Patent Agent, 57, Barton Arcade, Manchester.