Improvements in Mechanism for Securing Doors and Casements.
Year: 1892

page_text: Date of Application, 31st Mar., 1892-Accepted, 18th June, 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by GUSTAVE DROUET, of No. 6, Boulevard de
Strasbourg, Paris, in the French Republic, Packer.]
Improvements in Mechanism for Securing Doors and Casements.
I, HENRY HARINGTON LEIGH, Fel. Ch. Inst. P.A., Assoc. M. Inst. C.E.,
practising as Phillips & Leigh, No. 22, Southampton Buildings, Chancery Lane, in
the Administrative County of London, Engineer and Patent Agent, 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 relates to improvements in mechanism for securing doors and
casements to the extent of rendering their being broken open impossible. It is
specially applicable to the doors and casements of dwelling houses, and its objects
are attained by means of the mechanisms illustrated in the accompanying
drawings which are to be taken as part of this Specification and read therewith.
Fig. 1 illustrates the application of the invention to a single leaf door.
Fig. 2 illustrates the application of the invention to a door of two leaves.
Figs. 3 & 4 are detailed illustrations on an enlarged scale.
Fig. 5 is a detail front elevation illustrating the connection between a straight
bar and a quadrant.
Fig. 6 is a detail front elevation illustrating the junction between the two pieces
of a straight bar.
Fig. 7 is a transverse section corresponding therewith.
Fig. 8 is a detail front elevation of the bolt on the top end of a straight bar.
Fig. 9 is a detail front elevation of the bolt and staple of a quadrant.
Fig. 10 is a longitudinal section corresponding therewith.
u,
Fig. 11 is a plan of a dished plate and the guiding pin.
Fig. 12 is a detail front elevation of the pinion and racks.
Referring to Fig. 1, A. and A' are two straight bars of metal or other suitable
material. One of them is allotted to the upper and the other of them to the lower
half of the door. Their adjacent ends each terminate respectively in a rack a¹
as shewn in Fig. 3. Each bar-end is cranked outwards but is narrower than the
bar proper, with the necessary consequence that when the two bars A, A' are
aligned upon the door, one above the other, there will be room enough between the
two racks for a pinion B which engages with them both. A box C, something like
the case of a rim-lock, is fixed to the door by any convenient means. The pinion B
is turned by means of a spindle b which is provided with a grip b¹ on the inside of
the room.
Each bar A and A' carries on its outer end a bolt a. This is hollow
in part so that there may be a little play. a is a guiding slot of a length equal to
the play required and sufficiently wide to allow the guiding device moving in it-see
Figs. 8, 9 and 10. This latter as will be seen in Figure 11 consists of a T-headed
pin d mounted upon a dished plate D which is fixed to the door by means of
screws d. This plate should be fixed to the door in such a way that the T-head
stands at right angles with the slot a when the bar is shot-see Figures 8 and 9.
E, E-Figures 1 and 5-are tabs projecting from the bars A, A' for the purpose
of connecting the quadrants F thereto. The two bars A, A' may be made in one
piece; but for the purpose of making provision for the adjusting them to the
height of any particular door, I make each one in two pieces 2, 1.
The end piece
slides in a loop G in which it is held at the correct projection by a
enters holes in the said piece.
screw
which
Each quadrant F is furnished at its outer end with a bolt at of the same
construction as that on the end of a bar A or A¹, excepting that it turns on a

page_text: pivot f. As to the other end, it has a series of holes e set out in the line of the
arc of the quadrant for the purpose of providing for varying the point of attachment
according to the width of the door-see Fig. 5. Z, Z are the bolt-staples fixed to
the door frame. To use the grip by which the bolt y of the lock is moved in
actuating the mechanism under Specification, the devices illustrated in Figs. 3
and 4 have been devised. b is the spindle upon which the pinion B is fixed. The
latter actuates the racks a and a', and consequently, the bars A and A. H and H'
are two sleeves upon the said spindle. The former is fast thereto and has fixed to
it the lever / which actuates the bolt y through a hook or its equivalent h¹. The
other sleeve H¹ is loose upon the spindle. It is held firmly to the pinion B so that
they both turn together. By means of a moveable key K fitted into holes made in
the sleeves and the spindle, the independent parts may be held together,
and the pinion be moved by the grip b¹. The operation of the invention is now
understood.
To shoot the bolts, it is sufficient, after having coupled the pinion B and the
grip by means of the K as explained above, to unhook the hook /' and to turn
the grip 6. The latter then turns the spindle b and consequently the pinion B
which actuates the racks a, a' and the bars A, A', the bolts a of which enter their
respective staples at the same time as those of the quadrants F enter theirs. To
withdraw the bolts, the grip is simply turned in the opposite direction.
Fig. 2 represents the modification of the invention suitable for use on a two
leaved door. A, A' are the bars of the same construction as those described above,
excepting that the bars A, instead of being connected to the quadrants F by means
of tabs (as are the bars A¹ by tabs E'), are connected by a projection a* formed on
the side of the rack a-see Fig. 12. The said bars are likewise operated by a
pinion B which on its part is set in motion through a movable key Q.
L, L are safety bolts intended to hold the two leaves firmly aligned together
as if they were one door. Each consists of a rigid arc-shaped piece pivotted
at one end on a screw pin l. A slot receives a stud O fixed on the bar. Z' is
the staple.
In order that the door-lock may in the act of being locked safely secure the
present mechanism, the following devices which are illustrated in Figs. 2 and 3 have
been devised, the former for two leaved, and Fig. 3-this figure represents the
inside of the lock-for singie doors.
In the mechanism for two leaved doors one of the bars A passes behind the
lock. To the tail of the lock-bolt a stud N is fixed which, when the bolt in
question is shot, enters a notch n in the adjacent edge of the bar, thereby locking
the latter.
lock-bolt has a
In the latter,
bolt is unshot,
In the mechanism for single doors-see Fig. 3-the tail of the
prolongation M in which a slut m terminating in a hole is made.
turns freely a squarefast upon the spindle b, that is, when the
while it is motionless in any other position of the slot, that is when the bolt has
been shot.
Having now particularly described and ascertained the nature of my inven
tion and in what manner the same is to be performed I declare that what I
claim is
1. A mechanism for securing doors and casements being a combination of the
following principal members, the bars (as A, A') having racks (as a, a¹) on their
inner ends engaged by a pinion (as B) on a spindle (as 6) of a grip (as b') and
carrying tabs (as E) to which are connected, by means of screws, quadrants (as F),
the said bars consisting each of two parts (as 2 and 1) sliding the one past the
other through a loop (as G): the said bars and the quadrants carrying on. . their
outer ends bolts (as a) adapted to enter corresponding staples (as %) and guided
by devices (as d) standing across slots (as a³) formed in the said bolts (a): a
sleeve (as H) fast upon a spindle (as b) and a grip (as ) and carrying a lever
(as) which controls through a hook or its equivalent (as h¹) the lock-bolt (as y):

page_text: a second sleeve (as H¹) loose upon the said spindle (as b¹) but adapted to be fixed
thereto (as by a moveable key K), said sleeve being fast to the aforesaid pinion
(as B), and a prolongation (as M) of the tail of the lock bolt in which is formed a
slot m as wide as a square (as ) fast upon the said spindle (b), substantially as
hereinbefore described and as indicated in the accompanying figures.
2. A. mechanism for securing doors and casements being a combination of a
bolt (as A) in two parts (as 1 and 2) sliding one past the other and held together
by a screw-and-hole device (as G. g): a similar bar (as A) having a notch (as n)
in its side engaging with a stud (as N) upon the tail of the lock-bolt: a
quadrant (as F) carrying at its outer end a bolt (as a³) with a slot (as a³) guided
by a pin (as d) and engaging in a staple (as Z), the said quadrant being fixed by
its inner end to a projection (as a*) on the adjacent end of said bar (A): a pinion
(as B*) engaging with the toothed inner ends (as a and a¹) of the said bars (A, A¹)
and rotated by a key Q and a quadrant carrying on its outer end a bolt having a
guiding device and a staple, and fixed to the said bar (A¹) by means of a
tab (as E), substantially as hereinbefore described and illustrated in the
accompanying figures.
:
3. A mechanism for securing doors and casements, consisting of the combination
with bars racks and bolts controlled by a grip and pinion, of arc-shaped safety
bolts (as L) on pivots (as 1) and guided by slots (as ) upon studs (as O) fixed
upon the bars respectively, so as to enter the corresponding staples, substantially
as hereinbefore described and illustrated in the accompanying figures.
Dated this 30th day of March 1892
HENRY HARINGTON LEIGH,
Chartered Patent Agent.