Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-04-19
2011-04-19
Wu, Daniel (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S630000, C340S555000, C340S556000, C340S557000, C250S573000, C702S183000
Reexamination Certificate
active
07928854
ABSTRACT:
Techniques for smoke detection are provided. In one aspect, an exemplary smoke detection device is provided. The smoke detection device comprises an infrared beam transmitting unit; an infrared beam receiving unit; and a control module associated with the infrared beam transmitting unit and the infrared beam receiving unit. The infrared beam transmitting unit and the infrared beam receiving unit are configured to communicate with each other, via an infrared beam, and with the control module, via a signal produced in response to smoke being present at a level that is greater than a threshold smoke level.
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Chang, LLC Michael J.
Sherwin Ryan W
Wu Daniel
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