| Patent Number |
Title Of Patent |
Date Issued |
| 7167099 |
Compact particle sensor |
January 23, 2007 |
| A compact particle sensor for detecting suspended particles includes a housing, a light source, a light receiver and a plurality of optical elements. The housing provides a test chamber and includes at least one opening for admitting particles into the test chamber, while simultaneou |
| 6876305 |
Compact particle sensor |
April 5, 2005 |
| A compact particle sensor for fdetecting suspended particles includes a housing, a light source, a light receiver and a plurality of optical elements. The housing provides a test chamber and includes at least one opening for admitting particles into the test chamber, while simultaneo |
| 6653942 |
Smoke detector |
November 25, 2003 |
| A smoke detector includes a housing defining a dark chamber admitting test atmosphere. A light receiver is disposed within the chamber. A scatter emitter is positioned within the chamber such that light strikes the receiver when reflected off particles suspended in the test atmosphere. A |
| 6556132 |
Strobe circuit |
April 29, 2003 |
| A visual alarm device includes a flash tube that provides a visual indication responsive to trigger a signal. A strobe circuit is coupled between the flash tube and a power source and causes a flash tube to emit light at a desired flash rate. The strobe circuit includes a storage cir |
| 6469623 |
Smoke detector maintenance and verification tool |
October 22, 2002 |
| A smoke detector verification system, which includes a smoke detector, a portable computer system and an optical receiver, verifies the operation of the smoke detector. The smoke detector includes a light emitting diode (LED) that is periodically modulated to provide status information a |
| 6326897 |
Smoke detector |
December 4, 2001 |
| A smoke detector includes a housing defining a dark chamber admitting test atmosphere. A light receiver is disposed within the chamber. A scatter emitter is positioned within the chamber such that light strikes the receiver when reflected off particles suspended in the test atmosphere. A |
| 6225910 |
Smoke detector |
May 1, 2001 |
| A smoke detector includes a housing defining a dark chamber admitting test atmosphere. A light receiver is disposed within the chamber. A scatter emitter is positioned within the chamber such that light strikes the receiver when reflected off particles suspended in the test atmosphere. A |
| 5653906 |
Control system for a microwave oven, a microwave oven using such a control system and methods of |
August 5, 1997 |
| A control system for a microwave oven having a magnetron unit, a microwave oven using such a control system and methods of making the same are provided, the system being adapted to interconnect a power source to a transformer unit of the magnetron unit to operate the same, the system |
| 5616269 |
Control system for a microwave oven and method of making the same |
April 1, 1997 |
| A control system for a microwave oven having a magnetron unit and method of making the same are provided, the system being adapted to interconnect a power source to the magnetron unit to operate the same, the system comprising a display control module, a power module, and an electrical |
