Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Smoke detector with individual sensitivity calibration and monitoring










Image Number 4 for United States Patent #5543777.

A process and apparatus are provided for calibrating an individual smoke detector prior to installation so its sensitivity can be determined easily throughout its useful life. Representations of detector output signals are stored in the detector prior to installation, preferably at the time of manufacture, and used later for determining the sensitivity of the detector. The signals may represent alarm and clean-ambient conditions, or one of such conditions and the difference between them. During monitoring of the detector, after its installation, a new reading of a corresponding signal under clean-ambient conditions is sampled and the differences before and after installation are compared to determine the sensitivity of the detector when it is monitored. The detector includes electrical contacts from which a representation of detector sensitivity is available for monitoring with an external electrical probe, such as a common voltmeter.








 
 
  Recently Added Patents
Method and apparatus for modeling computer program behaviour for behavioural detection of malicious program
Memory component and memory device
Mobile phone
Braided pull tug pet toy
Buried object detection in GPR images
Cooking oven with energy saving mode and method
Techniques for determining optimized local repair paths
  Randomly Featured Patents
Disposable head and neck immobilization device and method
SO.sub.2 control using moving granular beds
Vibrating grate in a heating boiler
Video bitstream transcoding method and apparatus
Thermal performance of an integrated amplifier in a disc drive
Paper registration control device for printing presses
Adaptive quantization controller
Power transmission
Re-entrant angle closure on superplastically formed structure
System and method for the automated notification of compatibility between real-time network participants