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
Optimized control of an energy supplying system and an energy consuming system
Methods, devices and computer program products providing for establishing a model for emulating a physical quantity which depends on at least one input parameter, and use thereof
MOS resistor apparatus and methods
Method for using extended security system, extended security system and devices
Systems and methods for providing live voicemail to a mobile handset
Storage apparatus and method including page discard processing for primary and secondary volumes configured as a copy pair
Method and device for reducing image color noise
  Randomly Featured Patents
Portable barbecue and cooler carrying apparatus
Shift lever bush
Digitizer tablet with split-current conductor array
Transmitter modulated with three modulation patterns
Adjustable gage stop
Method of processing silver halide color photographic materials
Laser diode driver with extinction ratio control
Organic electroluminescent device with isolation region for improved light emission and systems including same
Face massager
Refrigerant compressor