Improvements in Door Fastenings.
Year: 1897

page_text: Improvements in Door Fastenings.
I, AUGUSTIN LAISIS, of 15, Rue Béclard, Angers, in the Department of the
Maine-et-Loire, France, Manufacturer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to a system of safety fastenings having movable safety
bolts and tongues operated automatically by means of the mechanism of the lock
when actuated by the proper key, and which system practically transforms house
doors into safe or strong room doors. Similar results may be obtained with
ordinary lock bolts and movable tongues operated by similar mechanism.
The lock does not require to be of special construction; and the operating
mechanism, which is very simple, can be adapted to any kind of lock.
In the case of office and bank doors and the like, I employ by preference the
arrangement with bolts on account of cheapness; these bolts are placed on the
faces of the doors, without requiring to be recessed.
When, however, as in the case of a room door, the mouldings, sculpture or
ornaments do not admit of bolts being applied to the faces of the doors, I employ
the fastening with movable tongues which do not show on the face of the joinery,
and which fustening forms a draft excluder which covers the chinks in the rebates
of the doors and obviates the necessity for the inconvenient and unsightly pads
Bometimes used.
When employing the fastening arrangement having bolts applied to the face
of the doors I make the dead bolt of the ordinary lock with a pin or stud which
takes into the slotted branches of two bell-crank levers pivotted on the lock. At
any required number of points round the circumference of the door are arranged
supplementary bolts having corresponding staples fixed to the jamb. These sup-
plementary bolts are guided in their movements by pillars or studs which take
into slots formed in the tails of the bolts. To each of the supplementary bolts
is jointed a suitably pivotted bell-crank lever the free arm of which is connected
by a rod to the free arm of one of the bell-crank levers pivotted on the lock.
It will now be understood that the movements of the dead bolt of the lock are
transmitted to the various supplementary bolts so as to move them all simul-
taneously into or out of engagement with their respective staples.
A stop device may be arranged if desired to prevent opening the door from out-
side. A spring holds this elop device in its two extreme positions, and this
spring may be operated by a suitable button or handle. Springs may also be
arranged to facilitate the movements of the bolts. The system of fastening with
draft excluding bolts (which bolts are so called because they prevent the passage
of currents of air through the rebates or under the door) is composed essentially
of an ordinary lock with a dead bolt on the tail of which is a pin on to which
are jointed two connecting rods or links which operate two suitably pivolted
bell-crank levers which are jointed at their slotted free ends to the tongues or
draft excluding bolts. These tongues are attached to the fixed frame by suitable

page_text: fixings or links which bend or yield in accordance with the movements of the said
tongues or bolts. These tongues or bolts engage at their ends in staples or
mortises in the jamb of the door. The vertical tongues transmit their movement
to horizontal tougues at the top and bottom of the door by means of levers placed
at the corners of the door and pivotted to the frame-work of the latter,
A stop piece held in each of its positions by means of a spring prevents the
opening of the door from outside by means of a key.
Dated this 8th day of December 1897.
improvements in Door Fastenings.
I, AUGUSTIN LAISIS, of 15, Rue Béclard, Angers, in the Department of the
Maine-et-Loire, France, Manufacturer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to by particularly
described and ascertained in and by the following statement:-
This invention relates to door fastenings and consists of a series of bolts arranged
along the rabbet and operated by means of rods and bell-cranks connected with
the bolts in such manner that the latches of all the locks are moved by operating
the key and bolt of the main lock. The lock according to this invention admits
of several modifications and may be used instead of locking devices similar to
those used for fastening French windows and for other purposes.
In the accompanying drawing
Figure 1 is a front view of the arrangement of the locks on the upper portion
of the door.
Figure 2 is a section of the main lock.
Figure 3 is a view of locks with movable vertical bolts of simplified construc-
tion.
Figure 4 is a partial section of the latter.
The safety lock according to this invention is constituted by a main lock H
and in the example illustrated six other locks, only those, J, K, L in the upper
portion of the door being shown in the drawing. The operating rods P are let
in into the material of the door. H, J, K, L, are the keepers, U, V, W,
the bolts, and N, O, R, S, T, operating bell-crank levers.
%,
The door is shown in the drawing in dotted lines as it is, properly speaking,
invisible being behind the locks.
The working of the apparatus in Figures 1 and 2 is as follows:
When the door is closed and it is desired to open it, the key is turned and the
bell-crank levers N and of the lock H are operated simultaneously with the 4
main bolt, by a pin & secured to scid bolt and engaging with said bell-cranks,
This movement causes the rods P of the upper part of the door to descend and
those on the lower part to rise, the bell-crank lever R of the lock J moving to
the right about its pins a, the bolt V being thus drawn into the lock. The same
thing takes place in the lock K, the bolt W returning into its lock, but as here
the bell-crank lever S is connected to the bell crank lever T of the lock L by a
horizontal rod P, this rod causes said crank T to turn about its pine whereby the
bolt Z is operated and returns into its lock L.
The door is thus opened and all the bolts withdrawn by a single operation of
the key.

page_text: at the upper and lower portions of the door, the bolts of which locks are operated
by rods arranged at right angles to the main bolts, which rods in their turn aro
operated by bell-crank levers from the main bolts.
4. In apparatus of the kind described the arrangement of auxiliary locks with
vertical bolts pivoted about pins and acted upon by rods operated by a bell-crank
lever operated by means of the bolt of the main lock.
5. In apparatus of the kind described in Claim 2, the arrangement of long
locking bolts with fingers or projections adapted to engage with keepers said bolts
being operated by bell crank levers operated by the bolt of the lock.
6. In apparatus of the kind described in Claim 2, the arrangement of locking
bars, engaging with recesses in the door frame, operated by a combination of
bell-cranks operated by the bolt of the lock and links substantially as herein-
before described.
7. The combination and arrangement of parts constituting the completo lock-
ing device substantially as described or illustrated in Figure 1 or in Figure 3 or
in Figure 5 or in Figures 8 and 9 of the accompanying drawings.
BOULT & WADE,
Agents for the Applicant.
BOULT & WADE,
Agents for the Applicant.

page_text: Figures 3 and 4 show a simplified construction. In these figures the main
lock He has a single bell crank lever N one branch of which, provided with an
oval hole or slot, operates the bolt by means of a pin G¹ secured to said bolt.
Operating rods P are connected to the ends of the bolts h h by means of pius d d',
and operate said bolts by causing them to pivot about the pins i i¹; ff being
guides and stops for the bolts.
is a movable safety stop consisting of a pivotted plate or rod, normally
held by a spring m in the position shown in dotted lines, but adapted to be
turned down when desired to prevent the door from being opened. It then rests
against the bolt and prevents it from turning upwards about its pivot.
This arrangement for operating the bolts enables the intermediate bell-crank
levers to be dispensed with.
Figures 5, 6 and 7 represent a construction which enables in certain cases a
long bolt with fingers or projections (similar to those used for French window
fastenings) to be substituted for ordinary bolts, the working of said long bolt
being identical to that of ordinary bolts, the function of which is fulfilled by the
fingers or projections of the long bolt, the bolt itself acting as the transmission
rods of former constructions.
In these figures A and are the long bolts operated by bell-cranks B B
operated by the bolt of the main lock. A lixed screw o serves to guide the ends
of the long bolts in their up and down movement. These ends are reduced to
half their thickness so that when placed together they are only of the thickness
of the main part of the rods and are provided with grooves or slots forming a
guide for said screw.
The rods AA form the locking bolts at the top and bottom and are besides
provided with several fingers or projections Padapted to engage with
keepers 7, thus serving to increase the security of the lock.
One of the keepers may be provided with a suitable stop, if desired, to prevent
opening of the door, when required.
Figure 8 is a front view of the lock system in which locking bars or strips are
used showing the face applied to the door and the bars when the door is locked
by the bolt; said bars acting at the same time as draught excluders.
Figure 9 shows this arrangement in side-elevation.
Figure 10 is a section of bars which can be applied to the door without recess-
ing it.
In these figures, A³ is the bolt to which is secured a pin B3 sliding in a recess
or slot C and serving as a pivot for two rods D D. These rods act on the ends
of bars or plates E E which are guided in their reciprocating movement by
means of slots engaging with fixed pins F Faud by rods X X pivotted about
pins Y Y rivetted to a U-shaped plate (Figure 9) secured to the rabbet of
the door and applied to the inner face of the lock.
The reciprocating movement of the horizontal bars EE is caused by means
of bell-crank levers C¹ C³ pivotted at the corners of the door about fixed pins pl
and small links similar to those X X' already described.
By turning the key in the lock to lock the main bolt, the bers are all simul-
taneously operated by means of the links and bell-crank levers described and
engage with the recesses in the door-frame.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is;
1. A safety locking device for doors characterised by the arrangement of a
number of locks along the rabbet of the door and operated from the main lock.
2. In apparatus of the kind described the arrangement of bell crank levers
connected to the bolt, of the main lock and operating the bolts of auxiliary locks
by means of links and bell crank levers connected to said locks.
3. In apparatus of the kind described the arrangement of auxiliary locks placed