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
Techniques for performing translation of messages
Method for processing an algae medium containing algae microorganisms to produce algal oil and by-products
Multi charged particle beam writing apparatus and multi charged particle beam writing method
Method to calibrate RF paths of an FHOP adaptive base station
Managing device functionality during predetermined conditions
Differential ring oscillator and method for calibrating the differential ring oscillator
Method and system for using personal devices for authentication and service access at service outlets
  Randomly Featured Patents
Device and process for liquid treatment of wafer-shaped articles
Method and system for reducing power consumption in a display
Data processing system and method included within an oscilloscope for independently testing an input signal
Valve assembly with disk-like valve body
Core barrel capacity gauge and method
Ornamental light fixture with tropical motif
Hamper for disposable waste bag
Disk clamping element
Angle compensator for a monitor stand
V-nail fastener