Improvements in or relating to Turns or Fasteners for Cupboard Doors and the like.
Year: 1889

page_text: Date of Application, 2nd Apr., 1889
Complete Specification Left, 2nd Jan., 1890-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in or relating to Turns or Fasteners for Cupboard
Doors and the like.
I, THOMAS SIDNEY SHOULER of 27, Horsefair Street, Leicester, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has reference to fastenings for cupboard and other double doors and
is designed to provide a contrivance or device that will lock itself when the doors are
closed against each other and which will serve to keep the two doors secure when
closed without the aid or use of an inside bolt which must necessarily be used with
cupboard turns of ordinary construction.
According to this invention I wount on the spindle of an ordinary door knob or
equivalent an arm or lever preferably cranked and which may be provided with a slot
working on a pin to restrict its movement.
On the underside or front of a cupboard shelf I mount a suitable striking plate or
latch bracket which when the doors are closed will engage with the crank of the lever
and remain so until disengaged by a slight turning of the knob on the outside of
the door.
"
The end of the cranked arm or lever is arranged preferably so as not to project
beyond the edge of the door upon which it is fixed and thereby be prevented from
coming into contact with the other door when being opened or closed. I may find it
advisable instead of mounting the arm or lever upon the spindle of the door knob to
arrange for lifting or raising the said arm or lever by means of a cam or crank
underneath.
2
+1 1000
COMPLETE SPECIFICATION.
Improvements in or relating to Turns or Fasteners for Cupboard
Doors and the like.
I THOMAS SIDNEY SHOULER of 27 Horsefair Street, Leicester, Engineer 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 reference to fastenings for cupboard doors and the like and
consists of a device or contrivance adapted to lock itself when the doors are closed
against each other, and which will serve to keep the two doors secure without the aid
of an inside bolt which must necessarily be used with cupboard turns of ordinary
construction.
The invention will be understood from the following description, in reference to the
accompanying drawings in which Fig. 1 is a representation in vertical section of my
improved cupboard catch applied to cupboard doors, the latter being closed and the
catch locked.
Figure 2 is a sectional elevation on the line Y Z of figure 1.
Figure 3 is a horizontal section showing the lefthand door held in position by the
rabbet on the right hand door.
Figure 4 is a front elevation of the catch or fastener.
Figs 5 and 6 are modifications in perspective.

page_text: On the spindle A of an ordinary door knob I mount a plate B with a square
hole or otherwise so as to turn with the spindle. This plate is provided at its upper
end with a tongue B¹ bevelled at B2 to facilitate its engagement with the catch plate C
fixed on the front edge of the cupboard shelf C' when the door is closed. The plate C
may be fixed to any other desired part of the cupboard.
The plate B is movable on and secured to the inside of the cupboard door by a
screw D or equivalent carrying also a spring E E¹ the upright arms of which bear
against the sides of a slot B³ in the plate B. The lower curved end of the
spring E E¹ fits into a recess in the distance plate F. fig. 2. and the arm E¹ of the
said spring bears also against the inside edge of a slot in the distance plate F so as
to cause the plate B to resume its vertical or normal position after it has been moved
laterally as indicated by the arrow in fig. 2.
The distance plate F is loosely fixed on the spindle between the door and plate B
so that the tongue B' stands sufficiently proud of the door to enter a recess C² in the
edge of the cupboard shelf C. The plates B and F are kept in position on the
spindle A by a nut A¹. The improved catch as described is fixed on the right hand
door or the door G with the overlapping flange or rabbet G Fig. 3 so that when the
doors are closed and the tongue B of the plate B engages the plate C the left hand
door H will be held fast by the rabbet G'. When the door to which the catch is fixed
is closed to, the bevelled side B2 of the tongue B¹ will come into contact with the
bevelled edge of the plate C and will be moved laterally thereby, the spring E causing
the tongue B', immediately it is clear of the edge (3 of the plate O to resume its
normal or vertical position and engage with the back of the plate C as shown in
Fig. 2 and the doors will be locked in position.
By turning the knob A² the tongue B³ may be disengaged from the plate C and the
door can be opened.
In the modification shown in Fig. 5 a lever J and distance plate J¹ are mounted on
the spindle A and the end J of the said lever is bevelled so that on the door being
closed it comes into contact with the bevelled lower end of the plate K fixed to the
cupboard shelf K₁ preferably by screws and will be depressed and pass under the
plate K and owing to the lever J and distance plate J' being fixed out of their centre,
the parts to the right of the spindle A in Fig. 5 are sufficiently heavy to cause the
opposite end to rise after being depressed, and the end J2 of the lever J to engage
with the plate K as shown.
In the modification shown in fig. 6 the lever L is bent at its forward end so
as to avoid the necessity of a distance plate as shown in Fig. 5 and is provided with
a slot L' working on a pin L' on the inside of the cupboard door to restrict the
movement of the lever L.
The contrivances or devices hereinbefore described can be employed with single
doors when desirable.
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. The combination with two folding cupboard doors of a self-locking catch or
fastener applied to the door with the over-lapping flange or rabbet so that the other
door will be secured thereby.
2. A cupboard catch or fastening consisting of a spring-controlled-plate such
as B distance plate F mounted on a spindle A and engaging a plate such as C
substantially as described and illustrated in the accompanying drawings.
3. The combination and arrangement of parts forming the self locking-device or
contrivance for single or double doors substantially as described and illustrated in
figs. 1 to 4 of the accompanying drawings.
4. A cupboard catch or fastener consisting of a lever or latch such as J, distance
plate J¹ engaging plate K substantially as described and illustrated in fig. 5 of the
accompanying drawings.

page_text: 5. A cupboard catch or fastener consisting of a lever usch as L cranked at one end
to engage with a plate K and slotted at its opposite end to work on a pin to restrict
its movement substantially as described and illustrated in fig. 6 of the accompanying
drawings.
Dated this 1st day of January 1890.
Witness,
E. NORTH LEWIS,
Berridge Street, Leicester.
W. P. Thompson & Boult,
Agents for the Applicant.