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US 2002/0153499 A1Published application
Scattered light smoke alarm
AssigneeRobert Bosch GmbH
InventorsUlrich Oppelt, Andreas Hensel, Bernd Siber, Anton Pfefferseder
Life of this patent
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Abstract
A dispersion light smoke detector has a structure for providing a definite measuring volume, the structure being formed as two light receivers or an imaging optical system for one light receiver.
Claims6
A dispersion light smoke detector, comprising means for providing a definite measuring volume, said means being formed as means selected from the group consisting of two light receivers, and an imaging optical system for one light receiver.
Dependencies are inferred from the claim text.