Improvements in Mechanism for Closing Doors and Swinging Shutters.
Year: 1891

page_text: Date of Application, 25th Nov., 1891-Accepted, 2nd Jan., 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by GUSTAVE DROUET, of No. 6, Boulevard de
Strasbourg, Paris, in the Republic of France, Manufacturer.]
Improvements in Mechanism for Closing Doors and Swinging
Shutters.
I, HENRY HARINGTON LEIGH, Fel. Ch. Inst. P.A., M. Inst. C.E., practising
as Phillips & Leigh, of No. 22, Southampton Buildings, Chancery Lane, in the
County of Middlesex, Engineer and Patent Agent, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be partien-
larly described and ascertained in and by the following statement :—
This invention relates to improvements in mechanism for closing doors and
swinging shutters of either single or double leaves, and its object is to render their
being burglariously opened absolutely impossible.
According to this invention, the leaf or leaves are, when closed, made practically
one with the frame, and inseparable from it excepting in the special way specified.
Referring to the accompanying drawings,
Fig. 1 is a front elevation illustrating the application of the invention to a door
of one leaf.
Fig. 2 is a front elevation illustrating the application of the invention to a door
of two leaves.
Referring to Fig. 1, A. is the door. B and C are two bolts adapted to work
in opposite directions under the action of a grip D fixed on the inside of the door
and intended to be worked by hand.
Any suitable method of shooting and retracting the bolts B and C may be
employed. Preferably there is formed on the inner end of each of the bolts a rack
in which engages a pinion fast on the spindle of the grip D. Espagnolette fasteners
nay also be employed. The outer ends of the bolts B and C are suitably
thickened.
B, Care cross pieces made fast in any convenient way to the bolts B and C,
respectively. E, G, F, H are bent arms or bolts pivotted in pairs to the respective
cross pieces B', C'. Moreover they are held to the door by studs a engaging in
slots . The outer ends of the bent arms are also thickened as described with
reference to the bolts B and C.
I is a connecting rod. One end of it is fast to the bolt of the lock ), and the
other of it toothed, and engaged by the pinion which operates the bolts B and C,
thereby rendering their retraction impossible so long as the bolt of the lock j
remains shot.
In the case of doors made to be opened from the outside, a key or wrench of any
suitable type adapted to engage the spindle of the grip D may be used. The
hole for such key or wrench is concealed by the external ornamentation of the
door.
It will now be understood how my invention works, i.e., how by turning the grip D
in the proper direction, the ends of all the bolts B, C, E, F, G, and H are all shot
into their respective sockets in the door frame by which means therefore the door
itself is practically made one piece and inseparable therefrom excepting as provided
for the reversal of the grip D.
Referring to Fig. 2, A, A' are the two leaves, B, C are the bolts of a construction
analogous to and actuated in the same way as that described with reference to
Fig. 1.
B, C are the cross pieces to which are respectively pivotted the bent bolts or
arms E, F.
The engagement devices o-by which an operative connection between the

page_text: arms G, H, and the crosspiece is B C respectively- are necessarily in two parts
each both separable from each other and capable of being easily re-engaged. I
suggest as a very convenient type of device and one which I prefer to use, a stud
on the end of either cross piece or bent arm and a corresponding hole in the end of
the other, so that when the leaf A¹ is opened the cross pieces B'C' disconnect
from the door and re-engage with them when the said leaf is closed into the frame
again.
The following mechanism is intended to fasten the two leaves so closely together
that they will be practically one.
K, Kare arcs pivotted by screws or pins k upon the leaf. They are connected
with the bolts B or C, as the case may be, by a stud L which engages in an arc
shaped slot, the said stud being fast to the respective bolt B or C, as the case
may be.
As the leaves are closed into the frame, and the rebate on one bears upon
the opposite one, the bolts B and C are shot. The studs slide along the slots
and so force the arcs K into their respective sockets M.
It will be clear from the preceding Specification and an examination of the
accompanying drawings, that the present invention can be applied with equal
facility to existing doors or leaves as well as to new ones, and without weakening
either, inasmuch as the insertion of a few screws constitutes all the fixing required.
In fact in some cases the existing espagnolettes can be utilised.
To prevent cutting the mouldings, the bolts may be cranked so as to clear them,
or the points of fixation may be packed up so that the bars shall stand clear of the
mouldings.
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 closing devices for doors and leaves, in combination with a pair of bolts
as B, C, adapted to be shot in opposite directions and a grip D to operate them,
bent bolts as E, F, G, H, as set forth with reference to the accompanying
drawings.
2. In combination with a pair of bolts as B, C, adapted to be shot in opposite
directions, bent bolts as E, F, G, H, and the rod I placing them all in connection
with the bolt of the lock, as set forth with reference to the accompanying
drawings.
3. In combination with a pair of bolts as B, C, adapted to be worked in opposite
directions by a grip D, bent bolts as E, F, pivotted respectively upon the said
bolts B, C, bent bolts as G, H, ares as K pivotted on or to the door and provided
with slots as k', k', in which studs as L fast on the bolts B, C, engage, as set forth
with reference to the accompanying drawings.
4. In combination with a pair of bolts as B, C, and a handle as D to work them
in opposite directions, bent bolts as E, F, pivotted upon the said bolts respectively
and bent bolts as G, H, engaged by guides fixed on the door or leaf, as set forth
with reference to the accompanying drawings.
5. In combination with a pair of bolts as B, C, and a grip as D to work then
in opposite directions, arcs as I having grooves as ', k¹, guiding studs as L and
sockets as M, as set forth with reference to the accompanying drawings.
Dated this 18th day of November 1891.
HENRY H. LEIGH, C.P.A.