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US 4,002,229 AGranted
Trash chute locking system
OwnerNorris J. Washingtoninventor
Life of this patent
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Abstract
A system for locking the doors of a trash chute located within a multi-story structure. A beam of radiant energy extends the length of the chute to a receiver, and upon interruption of the beam by blockage of the chute, the receiver transmits a signal to a detector which in turn energizes locking means to lock all entries to the trash chute until the blockage has been removed. Fire-sensing means and a source of water to flood the chute are also utilized should the blockage catch fire before being removed.
Claims9
A trash chute system for preventing trash from being deposited in a trash chute which has a blockage in a multi-story structure including:
- a trash chute having multiple entrances,
- beam-emitting means for transmitting a beam longitudinally of said chute past a plurality of said entrances,
- receiver means positioned in the path of said beam to receive said beam,
- means connected to the receiver means for generating a malfunction signal when the beam is interrupted between the entrances and between the beam-emitting means and the receiver means, and
- access-preventing means at each trash chute entrance operable in response to said malfunction signal to prevent entry to said chute and to prevent trash from being deposited when there is a blockage in the trash chute.
2 more elements
Dependencies are inferred from the claim text.