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 device for peer arrangement in single substream upload P2P overlay networks
System, method, and computer program product for identifying unwanted data communicated via a session initiation protocol
Head shield
Antibodies to non-functional P2X.sub.7 receptor
Down-drawable, chemically strengthened glass for cover plate
Systems and methods for selective text to speech synthesis
Mobile terminal and controlling method thereof
  Randomly Featured Patents
Mold assembly
Universal scent-emitting toilet paper roller
Vacuum-based pest capture container
Optical navigation upon grainy surfaces using multiple navigation sensors
Method of photolithographically metallizing at least the inside of holes arranged in accordance with a pattern in a plate of an electrically insulating material
Rust retarder applicator
Arrangement for cooling a synthetic gas in a quenching cooler
Depth and refocusing pulses for use with inhomogeneous radiofrequency coils in nuclear magnetic resonance spectroscopy
Buffer management and flow control mechanism including packet-based dynamic thresholding
Input device using tapping sound detection