Description: Patent for a new and improved burglar alarm. This design "consists in the combination of the door provided with a rod for catching under the spring, a cylinder for receiving powder, a spring-actuated cover for the end of the cylinder, and a spring which explodes the cap . . . The object of [the] invention is to provide a burglar-alarm which will make a loud noise when the door is opened, and in which a spring-actuated cover is made to take the place of a wad or ball" (lines 13-24).
Date: August 10, 1886
Creator: Bray, Horace Bradford
Item Type: Refine your search to only Patent
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