IMPROVEMENTS IN APPARATUS FOR SECURING DOORS & WINDOWS AGAINST BURGLARS
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington Middlesex, for
an Invention of IMPROVEMENTS IN APPARATUS FOR SECURING DOORS &
WINDOWS AGAINST BURGLARS A communication to him from abroad by
W. Kilian, of Berlin, in the German Empire,
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 10th August 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex, IMPROVEMENTS IN
APPARATUS FOR SECURING DOORS AND WINDOWS AGAINST BURGLARS, a com-
munication to me from abroad by W. Kilian, of Berlin, in the German Empire,
an alarm
This invention consists primarily of a door-lock provided with
apparatus and in combination with a novable lattice fastened to the inner side of
a door. There are five essential parts to be considered: the lock itself, the key
thereto, the alarm apparatus, the locking plate, and the lattice.
The lock consists both of a real and a false construction, the former doing the
same service as an ordinary lock, and the latter serving to operate the alarm when
it is attempted to turn the lock by means of a false key, or without previous
knowledge of the arrangement.
The key is provided with both a movable and a fixed ward or bit, the former
operating upon the tumblers of the lock, and the latter, when the two wards have
been forced into contact by the compression of a spring holding them asunder,
upon the false construction, and thus permitting of the withdrawal of the bolt.
The alarm apparatus is so constructed as to be instantly set in operation by the
displacement of a lever which acts when it is attempted to operate the lock with
anything but the above-described key, or when the bolt is tampered with, or when
the false construction of the lock is touched, or when it is attempted to cut or break
through any part of the door. In the latter case, the said lattice, which covers
almost the entire inside of the door, being in combination with the said lever, sets
the alarm apparatus going.
The locking plate is so constructed of movable parts that when it is attempted
to force the door or to drill through the plate, a spring acts upon the lever which
controls the alarm apparatus, and sets the latter going.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the
9th February 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, " IMPROVEMENTS IN
APPARATUS FOR SECURING DOORS AND WINDOWS AGAINST BURGLARS," a com-
munication to me from abroad by W. Kilian, of Berlin, in the German Empire,
This invention comprises a lock, a key, an alarm apparatus and a locking
plate, and has for its object to secure doors and windows against the attack of
burglars.
1. The lock employed for this purpose and represented in the accompanying
drawings is a case-lock.
In Figs. 2, 3, 4 and 5 the lock is shown without rim and cover, and it is composed
of the following parts.
a. A lock plate on which are mounted all the other parts of the lock either
directly or indirectly.
b. A bolt B composed of a shaft e with stud e¹, of the head piece B', and the
spring C which latter serves to disengage the alarm apparatus.
c. Two sets of locking actions one of which is designated by I, II, III, IV and
serves, to maintain the bolt in the required position as well as to set the alarm
apparatus in motion, while the other set designated by fis known as Chubb's
locking action and shown in Fig. 3 by dotted lines.
d. A so called false locking action d with a false operating piece d' which serves
to operate the alarm if it is attempted to act on the lock by means of a
false key.
e. A bolt-pin b¹ shown in Fig. 2 by dotted lines.
f. A pin or key-guide 6 fixed in a bracket b³.
g. A box b placed on the exterior of the lock-plate and serving to receive the
tumblers I, II, III, IV,
bit
h. A flat pin b³ serving to guide the tumblers I to IV.
i. A number of screws and springs serving to operate the different parts.
2. The peculiarities of the key are clearly illustrated in Figa. 9 to 11.
It should be observed that the loose bit in front le can be turned against the
only if both come in contact with each other, that is to say if the action
of the spring is so far neutralized that the pin m engages in the circular
groove n.
The lock works in the following way.
When the key is introduced into the lock the movable bit / presses the
tumblers I, II, III, IV so far back until these latter, according to the recesses on
the front side of the bit k, release the stud e¹ of the bolt shaft, and the bit k rests
on the base of the pin 62; if the key is further pressed into the lock, the loose
bit approaches the stationary bit k until they coine in contact with each other,
the pin m engages into the groove n, (see Fig. 10) after which the proper
locking or opening of the lock may take place the same as in an ordinary lock.
The movement of the false locking action, when the proper key is used, consists
in the tumbler being lifted by the bit k¹, and caused to swing arround the screw d³
as far as is necessary to release the angle lever d' which then goes back or forth
with the bolt.
In the end position of the slot de represented in the drawing the tumbler is
maintained by the spring d³.

page_text: The peculiarities of the bolt consist principally in the arrangement of the spring C
and its connection with the working of the alarm apparatus which will be herein-
after described.
3. The alarm apparatus consists in a spring box A attached to the lock-plate, a
pointed pin a, a spindle with trigger al, and a hollow cylinder a receiving the
charge with the primer; this cylinder is fixed in the bracket a³, which is connected
with the shaft e of the bolt, so that when the lock is open the explosive compound
can never come in contact with the pin a.
The apparatus is set by withdrawing the bolt and forcing the pointed pin, by
means of a suitable tool so far back until the trigger a' engages in the bent of the
said pointed pin.
The hollow cylinder is then charged and the lock closed, and at the slightest
contact with the lever at the alarm apparatus is set in motion.
The lever a is set in motion and thereby causes the alarm, in the following
cases:
1. If by means of a false key or picklock one of the tumblers I to IV is forced
back so far that the cam b comes in contact with the lever.
2. If owing to the peculiarities of the locking plate the spring C fixed to the
bolt B is allowed so much free motion that the projection c is free to pass through
the recess c¹ and pushes against the lever a*.
3. If by introducing a false key the false operating piece d' of the false locking
action d is touched, the latter moves backward in the slot d³, moves the angle-
lever do, and thereby operates the lever a*.
4. If by cutting out a panel of the door (or by damaging the latter in other
ways for the purpose of effecting an entrance) one comes in contact with the loose
grating or lattice (see Fig. 20) and the latter is only slightly moved, the charge
goes off, in consequence of the trigger being put in solid connection with any part
of the grating.
4, The locking plate which is of great importance in the case mentioned under 2,
consists of a cover h and the two parts gl and g² which are fastened independently
of each other; the part g³ encloses the bolt head; h is movable on g¹ and g², in the
slots i¹ to it.
From the above it will be seen that if it is attempted to force the door by
pulling or pushing, or to remove the locking plate by boring it out, the room

page_text: 7. The application of a lever a' and an angle-lever d*, and the combination of
the said levers with the tumblers I, II, III, IV, the bolt B, the spring C, the false
tumbler d, the cam b, the locking-plate, and the key, described under (6). The
whole substantially as described and illustrated.
In Witness whereof I, the said Herbert John Haddan, have hereunto set my
hand and seal this ninth day of February A.D. 1883.
H J HADDAN (LS)