Wind Up 1902 Door Burglar / Intruder ALARM BELL

This is an interesting antique wind up door alarm. It is made by the Automatic Alarm Company in Chicago Illinois and has a patent date of September 2^nd 1902. The piece is about 5” long. It is in working condition. It may have been designed to be used in a home or for hotel use by travelers and salesman. It has a clockwork type mechanism under the bell. To wind it up you turn the bell. The piece is placed on the floor with the single pointed end against the door. The curved down double pointed end by the bell allows it to stick/hold on to the wood floor or carpet. When the door is pushed in it activates the trigger and the bell sounds. The bell has a ring sound similar to an old telephone or bicycle bell. The bell part is cast brass and has the number 415 cast in the metal on the inside of the bell.