Burglar alarm
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 1981
Issued Date -
N/A
app pub date -
Sep 17, 1979
filing date -
Jan 12, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gong or bell attached to a door such that when a thief breaks open the door, a ball or like object having a rod extending therethrough and resting on a ledge which projects from the top of a frame for the door, falls along the rod as the ball or like object is pushed with the door out of a slot in the ledge and rings the gong or bell by striking it and a spring which prevents muffling of the sound.
First Claim
Family
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Cited Art Landscape
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