Lot n° 104
Estimation :
2000 - 3000
EUR
Fichet lock. - Lot 104
Fichet lock.
Miniature model lock with anti-pick removal and four anti-acid tumblers. The key measures only 2,73 cm, its stem has a diameter of only 2,5 mm and the lock is only 5,78 x 5,82 cm. The informer is triggered by an attempt to pick one of the tumblers a little too high. It then blocks the bolt and the right key can no longer open it. This is how the attempt is signaled. In order to open, the right key must "over-close" the bolt a little more, which re-arms the lock and allows it to open. The tumblers are alternatively made of steel and brass to resist acid attacks destroying the tumblers. So that a simple hook is enough to open. It was assumed that a single acid could not eat away at both steel and brass. Although it is not signed, this lock and its key are the work of Alexandre Fichet in support of his patent n°3883 of March 28, 1829 whose drawings show the key with the same ring and especially the same combination of sizes. It seems that this invention is a shameless copy of Jeremiah Chubb's patent filed eleven years earlier on February 3, 1818 under the name of "detector lock" and which won him the competition launched by the Crown of England for an un-pickable lock. (see photocopy of the patent in the downloadable pdf catalog)
Fichet lock. Miniature model lock with anti-pick release and 4anti-acid levers. The key measures only 2.7 cm, its rod has a diameter of only 2.5 mm and the lock is only 5.7 x 5.7cm The anti pick device called "detector" is triggered by an attempt to pick lifting one of the levers a little too high. The detector then blocks the bolt and the right key can no longer open thus warning of the attempt. To open the key must "over-close" the bolt a little more, which rearms the detector. The levers are alternately made of steel and brass to withstand acid attacks destroying the levers. This assumed that a single acid could not corrode both steel and brass. Although not signed, this lock and its key are the work of Alexandre Fichet in support of his patent n°3883 of March 28, 1829, the drawings of which show the key with the same ring and above all the same combination of cuts. It seems that this invention is a shameless copy of the Jeremiah Chubb's patent filed eleven years earlier on February 3, 1818 under the name of "detector lock" and which won the competition launched by the crown of England for an unpickable lock.
Fichet-Schloss. Miniaturschloss mit Anti-Pick-Entriegelung und 4 Anti-Säure-Hebeln. Der Schlüssel misst nur 2,7 cm, sein Stab hat einen Durchmesser von nur 2,5 mm und das Schloss misst nur 5,7 x 5,7 cm. Die als "Detektor" bezeichnete Anti-Picking-Vorrichtung wird ausgelöst, wenn versucht wird, einen der Hebel etwas zu hoch anzuheben. Der Melder blockiert dann den Riegel und der rechte Schlüssel kann nicht mehr öffnen und warnt vor dem Versuch. Um den Schlüssel zu öffnen, muss der Riegel etwas mehr "übergeschlossen" werden, wodurch der Detektor wieder aktiviert wird. Die Hebel bestehen abwechselnd aus Stahl und Messing, um Säureangriffen zu widerstehen, die die Hebel zerstören. Dabei wurde davon ausgegangen, dass eine einzige Säure nicht sowohl Stahl als auch Messing angreifen kann. Obwohl nicht signiert, sind dieses Schloss und sein Schlüssel das Werk von Alexandre Fichet zur Unterstützung seines Patents Nr. 3883 vom 28. März 1829, dessen Zeichnungen den Schlüssel mit demselben Ring und vor allem derselben Schnittkombination zeigen. Es scheint, dass diese Erfindung eine schamlose Kopie des elf Jahre zuvor eingereichten Patents von Jeremiah Chubb ist 3. Februar 1818 unter dem Namen "Detektorschloss" und gewann den von der Krone von England ausgeschriebenen Wettbewerb um ein unknackbares Schloss.
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