A - Human Necessities – 47 – F
Patent
A - Human Necessities
47
F
A47F 7/00 (2006.01) G01V 8/12 (2006.01) G01V 8/14 (2006.01) G08B 13/184 (2006.01)
Patent
CA 2159826
A presence detector for use with a mobile storage system including at least a first movable storage unit with a prim mover (16) adapted to move the shelving unit along a path of movement, and at least one blocking object (24), such as a second movable storage unit, a stationary storage unit or a wall, positioned on the path. The presence detector includes at least one light source (28) mounted to either the first unit of the blocking object so as to provide light into the path of movement. At least one light detector (30) is mounted to the blocking object or first unit, respectively, opposite the light source. A control unit (22) is connected to the light detector and receives a signal from the light detector, that signal indicating whether or not the light detector is deceiving light from the light source.
Griesemer Patrick J.
Mchenry William B.
Borden Ladner Gervais Llp
Spacesaver Corporation
LandOfFree
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