(A) PERCUSSION DOOR ALARM GUN

This is a very interesting door alarm gun, that appears to have been configured to double as both the lock and an early warning system in the event of burglary. Double bolts with a sliding Y shaped latch bolt, which is protected by a layered five plate system, which interfaces on a square post and are cut with a V-spring to provide downward pressure, but each channel is shaped slightly differently. When the appropriate key is used, it will lineup the channels and allow the latchbolt to move. There is a additional plate at the back that functions as a sear for the mainspring, so that if someone tries to pick the lock and overextends the pick, and alarm will fire. There is evidence that additional mechanisms provided other safeguards, as the bottom bolt is spring loaded, and may have also attached to the sear, but there are parts missing. CONDITION: Metal with oxidation and patina throughout, with some parts missing. A very interesting example that is terribly clever mechanically.

Name

Value

Barrel Length

2 - 1/4"

Caliber/Bore

.41 Smoothbore

FFL Status

Antique

Manufacturer

American (?)

Model

Percussion