AN IMPROVED SAFETY LOCK
Year: 1866

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and Foreign
Patent Offices, 24, Rue du Mont Thabor, Paris, in the Empire of
France, and 38, Porchester Terrace, Bayswater, in the County of Mid-
dlesex, for the Invention of "AN IMPROVED SAFETY LOCK."-A com-
munication from Louis Jean Pierre Silvestre, Machinist, residing in
Paris, Rue Neuve Popincourt, 40, in the Empire of France.
COMPLETE SPECIFICATION filed by the said Henri Adrien Bonneville
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 2nd July 1866, pursuant to the 9th Section of the
Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRI
ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 24, Rue du
Mont Thabor, Paris, in the Empire of France, and 38, Porchester Terrace,
Bayswater, in the County of Middlesex, send greeting."
WHEREAS I am in possession of an Invention for "AN IMPROVED SAFETY
Lock," communicated to me by Louis Jean Pierre Silvestre, Machinist, a
person residing in Paris, Rue Neuve Popincourt, 40, in France, and have
petitioned Her Majesty to grant unto me, my executors, administrators, and
assigns, Her Royal Letters Patent for the same, and have made solemn
declaration that it is a communication.

page_text: NOW KNOW YE, that I, the said Henri Adrien Bonneville, do hereby
declare that the following Complete Specification, under my hand and seal,
fully describes and ascertains the nature of the Invention, and the manner in
which the same is to be performed, reference being had to the Figures of
the accompanying Drawings, and to the letters marked thereon, that is
to say :-
The Invention communicated to me consists in combining the improved
mechanism of a lock with clockwork setting off an alarum should an attempt
be made to pick the lock by means of false keys.
The Figures of the accompanying Drawings, in which the same letters of
reference indicate similar parts, set forth the mechanism and clockwork
combined, and the different parts separately.
Figure 1 is a front view of the lock with the box A containing the
clockwork and bell of alarum B' combined; Figures 2 to 9 give the several
views of the improved pieces of the lock separately; Figure 10 gives a front
view of the clockwork and alarum; and Figures 11 to 19 give the various
detached pieces of the clockwork.
That part of the lock which is improved (the other pieces being similar
to those in ordinary locks) consists, -1°, in the bolt. A and its rod
surrounded with a spiral spring, as shewn planc in Figure 2; 2°, in the
guard piece B, viewed on one side with key in Figure S, moveable on a
screw with rundle H, viewed plane in Figure 4, the inferior extremity of
which is bevelled and held by the spring E, viewed plane in Figure 5. 3º, in
the bent rod D, viewed plane in Figure 6, and held by the guide G, viewed
on one side in Figure 7, and fixed on box A' containing clock work, a curved
extremity I of the rod D enters into a cavity I in piece B, the other end
equally bent leans against the lever or hammer J of bell B¹. 4°, in lever C,
viewed on one side in Figure 8, acting upon bolt A and moveable on screw
F, front view.
The clockwork in box A', Figure 1, seen apart in Figure 10, and in
plane in Figure 11, the detached parts of which are given in Figures 12
to 17 inclusively, consists, -1°, in a barrel M, seen plane in Figure 18
and 19, in this last with spiral spring Y, which is put into a state of
tension by the moveable piece T, viewed frontwise in Figure 12 entering
into the barrel. 20, in a denticulated wheel N, seen plane in Figure 11 and
separately in Figure 13, fixed on the arbor crossing the barrel M, whose
extremity V of a square form is next wormed to receive a nut U, seen apart
in Figure 14, which maintains the barrel connected with the clockwork. 3º,
in a motion P, seen plane in Figure 11. and viewed on one side in Figure 15,

page_text: catching the denticulated wheel N, and acting upon a cog wheel O adapted
to the same arbor, as seen plane in Figure 11, and viewed on one side in
Figure 15, which cog wheel also acts on an anchor Q, seen plane in Figure 11,
and viewed on one side in Figure 16 and front viewed in Figure 17, the arbor
of which has at its end the hammer that strikes the bell. A ratchet Z con-
trolled by a little spring Z (Figure 18) maintains the tension of the spring.
When the key is put into the lock it will turn round freely, and will act on
the lever C which works the bolt A, but if, on the contrary, a false key is
introduced into the lock, its bit, whose teeth do not correspond with the
guards of piece B, will come in contact with this latter, and by pushing it
back will displace the rod D, which will no longer bear on the lever J of
the hammer of bell B'. The lever thus freed and controlled by the wound-
up clockwork will cause the hammer to strike on the bell, and so give the
alarm. The bell and clockwork may be placed at a distance from the lock
by connecting them together by means of cranks and wires K and L, in
greater or less number according to the distance that separates the lock from
the alarum. In this case the end of the wire nearest the bell is connected
with a little rod D¹, Figure 10, moveable between two props S, one of the
bent ends of which leans like the rod D against the lever J of the bell
hammer; thus disposed the rod D being displaced, by the insertion of a
false key into the lock, draws the rod D by the wires and the cranks K and
L, and the lever of the hammer becoming disengaged as above described,
the alarm is given; the rod D¹ is then brought back to its place by the
spiral spring R, which surrounds it between the two props S.
Having now described the nature of the said Invention, and the manner
of carrying it into effect, I would have it understood that I do not confine
myself to the precise details above laid down; but claim the construction
and arrangement of my improved safety lock with clockwork setting off an
alarum, substantially as above described and represented in the different
Figures of the accompanying Drawing.
In witness whereof, I, the said Henri Adrien Bonneville, have hereto
set my hand and seal, this Twenty-ninth day of June, in the year
of our Lord One thousand eight hundred and sixty-six.
H. BONNEVILLE. (L.s.)