Detector With Optical Block
US-2015379846-A1 · Dec 31, 2015 · US
Scattered-light fire detector with a device for suppressing an acoustic warning in the event of a low battery voltage
US9053620B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9053620-B2 |
| Application number | US-201113218554-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 26, 2011 |
| Priority date | Aug 26, 2010 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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Abstract
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A fire detector has a detection unit working on the optical scattered-light principle, as well as an electronic evaluation unit. An acoustic and/or optical warning device outputs an acoustic and/or optical alarm when a fire is detected. The fire detector has an energy storage device, in particular a battery, for the autarkic supply of electrical power to the fire detector as well as a voltage measuring unit for measuring a battery voltage present at the energy storage device. A warning device outputs an acoustic warning if the battery voltage falls below a first voltage threshold. The fire detector also has a sensor sensitive to ambient light and a device for suppressing the output of the acoustic warning if the ambient light falls below a predefinable brightness threshold. The detection unit is an open scattered-light detection unit with a detection space outside the fire detector and the sensor sensitive to ambient light is at the same time an optical receiver of the scattered-light detection unit.
First claim
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The invention claimed is: 1. A fire detector, comprising: an open scattered light detection unit operational on an optical scattered-light principle within a detection space outside of a fire detector housing, said detection unit including an optical receiver sensitive to scattered light within said detection space; an electronic evaluation unit connected to said detection unit and a warning device for outputting an acoustic and/or optical alarm when a fire is detected; an ene…
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- G08B17/107Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US9053620B2 cover?
- A fire detector has a detection unit working on the optical scattered-light principle, as well as an electronic evaluation unit. An acoustic and/or optical warning device outputs an acoustic and/or optical alarm when a fire is detected. The fire detector has an energy storage device, in particular a battery, for the autarkic supply of electrical power to the fire detector as well as a voltage m…
- Who is the assignee on this patent?
- Clossen-Von Lanken Schulz Michael, Siemens Ag
- What technology area does this patent fall under?
- Primary CPC classification G08B17/107. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 09 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).