An Improved Combination Bolting and Locking Device.
Year: 1887

page_text: Date of Application, 17th Mar., 1887.
Specification Accepted, 29th Apr., 1887.
An Improved Combination Bolting and Locking Device.
I, FRANCIS JOSEPH JAMES GIBBONS, of St. John's Works, Church Lane, Wolver-
hampton, in the County of Staffordshire, 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:-
My invention relates to an improved mechanism for bolting and locking. It is
more particularly applicable to swinging doors, such as those of glass cases for the
exhibition of goods, curioes, or specimens; or of wardrobes, book-cases, and the like;
and consists in the combination of a duplex bolting mechanism actuated synchronally
with a latch-bolt which is projected from the edge of the door into its staple suitably
fixed for its reception, and locked by causing a lock bolt to engage with said latch
bolt.
I attain the object of my invention by means of the mechanical devices illustrated
in the accompanying sheet of drawings, in which
Fig. 1 is a side elevation shewing the invention fixed on the inner face of a door
and alongside the edge thereof.
Fig. 2 is a rear elevation or inside view corresponding with Fig. 1, and illustrating
the internal mechanism of the case containing the latch-bolt, the links connecting it
to the door bolts, and the lock; the cover of the case being omitted for that purpose;
while
Fig. 3 is a detail illustrating the construction of the lock.
The above figures show the bolts shot and locked, but do not include the bolt-
sockets or the staple of the latch-bolt, inasmuch as their construction and relative
position are self-evident and well-known.
A is the door-rail; B, B1, the top and bottom bolts; b, b', their guides; O, the case
containing the links, latch-bolt, and lock; and C, its cover.
The case and bolt-guides b, bare shewn as screwed on the inner face of the
door-rail, but they may be morticed in. I prefer that they should be (as shown) in
one plane.
The ends of the case and its cover have grooves c¹ formed therein and which serve
as additional guides for the bolts B, B¹. It is also sunk to receive the lock-case D,
and has a slot c³ cut in it which serves as a guide for the lock-bolt.

page_text: E is the latch-holt, and e, its follower the latter capable of being rotated in the
case C and its cover c by the square end of the shank of the handle F, which
shank has a second bearing fast on the outer face of the door, and in which is
cut the hole for the key G, of the lock.
The bolts B, B' are respectively connected to the opposite edges of the latch-bolt E
by means of links e', e, the ends of which are pivotted to the bolt ends and the latch-
bolt, respectively in any convenient way.
The lock is of the ordinary construction with the exception of its bolt d, which,
unlike ordinary lock bolts, is not withdrawn into its case when the lock is unlocked.
The outer part of the bolt is always outside the case D, and travels between it and
the adjacent edge of the case C: the slots c² and (the latter cut in the cover c)
and the studs projecting from itself serving as guides for it.
A notel is cut in the lower edge of the latch bolt E, into which the outer part or
nose d of the lock-bolt enters when it is shot, and inasmuch as the latter moves in a
plane at right angles with that of the former, the bolt E will be prevented by the
nose d from being moved.
My invention is operated as follows for the purpose of opening the door :-
The lock bolt is unshot by means of the key G, which act releases the latch bolt E.
The handle is turned through a quarter of a circle, the latch bolt E turned up into
the case C (when it will occupy the position indicated by the dotted lines in Fig. 2)
and the bolts B, B' withdrawn from the sockets into the guides b, b'.
A reversal of these operations bolts and locks the door.
I have described my invention as constructed for a hinged door. I wish to point
out that it is equally applicable to a sliding door, the only necessary modification
being in the nose of the latch bolt which would then be hooked for the purpose of
engaging behind its staple.
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. The combination of bolts linked to a latch-bolt projected or withdrawn by a
partial rotation around its axis with a locking device which engages with said latch-
bolt by a bolt entering it in a plane at right angles to its own plane of rotation;
substantially as described with reference to the accompanying figures.
2. The combination of bolts, links, and latch-bolt operated by a handle with a lock
operated by a loose key, the bolt of which engages with the latch bolt when the
latter is projected from its case and prevents its withdrawal; substantially as and
for the purpose described with reference to the accompanying figures.
3. The combination of lock case, key, and lock-mechanism, the bolt of which has
a permanently protruding nose working in a plane at right angles with that of the
latch-bolt it is shot to lock; substantially as described with reference to the accom-
panying figures.