Improvements in Automatically Latöhiñĝ and Bōiting Doors.
Year: 1886

page_text: Date of Application, 3rd June, 1886.
Complete Left; 11th Oct., 1886.
Complete Accepted, 11th Jan., 1887.
Improvements in Automatically Latöhiñĝ and Bōiting Doors.
I; JOSEPH KAYE of 93 High Holborn London in the County of Middlesex and
Bank House Kirkstall, Leeds in the County of York, Lock Manufacturör, do hereby
declare the nature of this iny invention to be as follows
The principle object of this invention is to temporarily latch one of a pair of folding
doors one door is closed the first and by closing the second one I make the temporary
latch a secure bolt, also to temporarily latch single doors in such a way that there will
be little obstruction in closing them.
In the case of double or folding doors secured in the ordinary manier, wlien one
door is opened the other is still fast by means of a bolt at the top or bottom of the door
or both which must be liberated if it is required that both doors should be opened. I
accomplish my object by employing a latch which is the segment of a circle moüinted
on a fulcrum and similar in construction to what is described in my specifications
No. 4873" and subsequent dates.
I mount the latch in a frame sliding in a second frame which I fix to the frame
work into which the door shuts. I employ by preference a spiral spring with its
fulcrum on the franie which is a fixture, the other end of the spring presses the latch
and sliding franie which bears the latch, into position for latching to the striking place
which is fixed to the door in a corresponding position:
The above may be reversed with tlie same effect by fixing the latch on the door and
an adjustable or other striking plate on the frame work which the door closes too.
In order to secure the other door and, prevent the before mentioned latch yielding I
employ a lever secured on a fulcrum, one end of the lever being connected to the slide
which carries the latch and the other end is bent so as to be flush with the door frame
and in the position that the second door comes in contact with it when closed by which
means the slide which carries the latch is prevented yielding, thereby keeping the first
door secure so that the second can be locked to it.
When the second door is open, the before mentioned lever is free; and on pressure
being applied to the door held by the automatic latch, it will yield thereby allowing
the door to be opened.
The automatic latch without the before inentioned lever, is applicable to single doors
and may be used in lieu of the ball latch with these advantages:
That the Door will close almost without obstruction and its holding power cari be
regulated by my patent adjustable striking plate No. 1648=1880.
JOHN WAUGH;
Sunbridge Chambers, Bradford;
Agent for Applicant.

page_text: Improvements in Automatically Latching and Bolting Doors.
I, JOSEPH KAYE of 93 High Holborn, London, in the County of Middlesex, and
Bank House, Kirkstall, Leeds, in the County of York, 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 :-
The principal object of this invention is to temporarily latch one of a pair of folding
doors, the door that is closed first, and by closing the second I make the temporary
latch a secure bolt; also to temporarily latch single doors in such a way that there will
be little obstruction in closing and opening them; and consists in substituting in lieu
of an ordinary barrel bolt for securing one of the folding doors, a latch and frame
which I secure to the door casing, the latch being made to protrude beyond the face of
the door casing by a spring so arranged as to allow the latch to yield when required.
In a recess in the before mentioned frame, and in connection with or forming part of
the latch, is a lever, so constructed that one end may be flush or projecting a little
beyond the door casing, so that when the second door is closed, it comes in contact
therewith and thus prevents the latch yielding, thereby keeping the first door secure
that the second can be locked to it.
In order that my invention may be better understood, I will describe the same more
in detail by making reference to the accompanying drawings, in which Fig. 1 represents
a portion of a pair of folding doors and casing with my improved latch attached, a
portion of the casing being cut away to shew more clearly the frame of the latch, Fig. 2
is a longitudinal section through the latch and frame, Fig. 3 a section with the lever
and latch removed, and Fig. 4 a detail of the latch and frame; the remaining figures
are hereafter described. In all the figures similar parts are indicated by similar letters.
The portions of the folding doors are indicated by the letters A and A', and the door
casing by B, in the latter is morticed and secured the frame Chaving a projecting
latch D, one portion of which is the segment of a circle and similar in construction to
what is described in my specification No. 48737 and of subsequent dates.
The frame C is made with a projecting piece in which is fitted a sliding box E, to
which is monnted the latch D. The said latch protrudes beyond the face of the frame C,
and when free, is kept in that position by. the spiral spring F placed around the
spindle G, the end of which is enlarged and pointed and in contact with the latch, the
spring being compressed between the bottom of the socket H and the enlarged end of
the spindle thus holding the latch D, box E and lever J in position.
In the said frame I mount the lever J, one end of which passes through a hole E' in
the sliding box E, and the other end at L when at rest may project beyond or stand
flush with the door frame O.
When closing the door A, it comes in contact with the straight surface of the latch D,
at D, which turns on its fulcrum, thus allowing the door to close, and at the same
time compressing the spiral spring F, which forces the latch D back beyond the face
of the frame C into the recess of a striking plate fixed in the edge of the door A, when
the latter is closed, thereby latching the same, which is then secured by closing the
other door A³, in the upper edge of which may be a screw in such position, that on the
head of the same coming in contact with the end of lever J at L, prevents the latch D
and slide E yielding, thereby keeping the door A secure that the second can be locked
to it.
When the door A' is open, the lever J is free, and on pressure being applied to the
door A, the edge of the striking plate pressing against the curved side of the latch,
causes it and the sliding box to recede into the projecting portion of the latch

page_text: frame C, thus allowing the door to open, which, when clear of the latch D, the com-
pressed spiral spring forces the latter, sliding box E, and lever J back to their original
position.
In working out my invention I find the first closing door of a pair of folding doors
may be secured by a modified latch which is automatic in its action both on the opening
and closing of the first of a pair of folding doors, and is secured by the closing of the
second door coming in contact with the latch lever in the manner as before described.
This modification may be constructed as shown by Fig. 5, which represents a sectional
elevation of an automatic latch in which the lever J is operated direct by the opening
and closing of the door, the segment catch D before described being dispensed with,
and a catch D formed at the end of the lever J somewhat as shown by the end view
Fig. 6.
The object of making the face of the latch D with an inclined plane at each side
thereof, is to facilitate the entering of the latch D into the recess of the striking
plate, and also that the latch may yield when pressure is put upon the first closing
door A in the manner as before described; or the same object may be accomplished by
making the protruding portion of latch D parallel, and forming the striking plate S
with an inclined plane on one side as shewn by cross section Fig. 7.
The other end of the lever may be formed in the manner as shewn by end views
Figs. 8 and 9, and when the first folding door is closed, on the edge of the same
coming in contact with the inclined surface of latch D, the lever J is operated, the
latch B retreating into the casing C, thereby allowing the door to close, when the
spring K causes the lever J to move in the opposite direction, the latch entering the
recess of a suitable striking plate, and on closing the second door, is held therein by
the latter, or the head of a screw coming in contact with the projection L at the oppo-
site end of the lever.
Another modification is shewn by Fig. 10 which represents a sectional elevation of
an automatic latch constructed in a similar manner as in Fig. 5, except the latch for
entering the striking plate is formed by introducing the roller M between two lugs
forming part of the lever J which acts in the same manner as the latch D before
described.
My invention may also be accomplished by forming the lever J somewhat as shewn
by Fig. 11, in which case the frame C is secured to the first closing folding door, and
the striking plate to the door casing, the latch D being held in the recess of the striking
plate by closing the second door, the edge of which, coming in contact with the edge J
of lever J keeps the latch D firm in the striking plate when both doors are closed.
By dispensing with the portion L of the lever at the opposite end to the latch D,
the apparatus is applicable to single doors and may be used in lieu of the ball latch
with these advantages, that the door will close with little obstruction, and the holding
power regulated by my adjustable striking plate described in Specification No. 1643
A.D. 1880.
Having now particularly described and ascertained the nature of this invention, and
in what manner the same is to be performed, I declare that what 1 claim is :—
1. The securing of folding doors by a latch D combined with a lever J and spring
the whole operating as and constructed substantially in the manner as shewn and
set forth.
2. A latch which is automatic both in the opening and closing of the first door,
combined with or secured to a lever J for locking it, controlled by the second of a pair
of folding doors.
3. The securing of single doors by a latch D, sliding box E and spring constructed
substantially in the manner as set forth in Fig. 2, but without the lever J.