Griswold made much more than just a line of cookware.
Did you know that Griswold also made, and held the patent for, a burglar alarm? I didn’t think so.
Inventors John Harvey and David Shields obtained a patent in 1894 for the gadget, and the patent was assigned to Matthew Griswold, founder of the Griswold Mfg. Co. I’ve only seen two; both in the (huge) collection of Larry and Marg O’Neil of Tacoma, Washington.
This burglar alarm was designed to be screwed into a door casing. If an unannounced person opened the door when the alarm was set, a blank cartridge to explode.
That would be a very nasty surprise for the would-be burglar!