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
Detection of procedural deficiency across multiple business applications
HSP20 inhibits amyloidogenesis and neurotoxicity
System and method for optimizing use of plug-in air conditioners and portable heaters
Catalysts for hydrodeoxygenation of polyols
Methods and systems for providing a business repository
Microbial fuel cell and method of use
Home appreciation participation notes
  Randomly Featured Patents
Method of producing a composite, more precisely a nanoporous body and a nanoporous body produced thereby
Inspection method and apparatus, and associated computer readable product
Solid state laser and method of manufacturing the same
Trench-defined silicon germanium ESD diode network
Use of flavolignans as adjuvants in tumour therapy
Hydrazide compound and use of the same in pest control
Semiconductor memory having redundancy circuit with means to switch power from a normal memory block to a spare memory block
Heme choline esters and uses thereof
Method of passivating semiconductor wafers
Cephem derivatives