| 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 |
| 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 |
| 5612848 |
Control device and methods of making and operating the same |
March 18, 1997 |
| A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a relay unit having a coil and contacts that are operated to one condition thereof when a direct current flows through the coil, the relay unit having a certain |
| 5534680 |
Control unit and method of making the same |
July 9, 1996 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 5477108 |
Control device and methods of making and operating the same |
December 19, 1995 |
| A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a vacuum fluorescent display unit having a filament unit, a power supply unit for being interconnected to a high voltage alternating current power supply that h |
| 5451746 |
Temperature control system for a cooking oven |
September 19, 1995 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 5440443 |
Control device and methods of making and operating the same |
August 8, 1995 |
| A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a relay unit having a coil and contacts that are operated to one condition thereof when a direct current flows through the coil, the relay unit having a certain |
| 5365146 |
Control device having an oscillator unit that pulses a direct current through the filaments of t |
November 15, 1994 |
| A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a vacuum fluorescent display unit having a filament unit, a power supply unit for being interconnected to a high voltage alternating current power supply that h |
| 5332874 |
Control device and method of making the same |
July 26, 1994 |
| A control device and method of making the same are provided, the control device comprising a single movable actuator member having two spaced apart plungers respectively operatively associated with and in axial alignment with movable parts of two switch units and having two actuator butt |
| 5324918 |
Control unit and method of making the same |
June 28, 1994 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 5126537 |
Control unit and method of making the same |
June 30, 1992 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 5015827 |
Control system for a cooking oven |
May 14, 1991 |
| A control system and method of operating the control system are provided, the system having a supervisory circuit for detecting failure of the system and disabling a high energy control circuit of the system, the supervisory circuit having a capacitor therein for sustaining an on con |
| 4994653 |
Control unit and method of making the same |
February 19, 1991 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 4935607 |
Control unit and method of making the same |
June 19, 1990 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 4922081 |
Control system and method of making the same |
May 1, 1990 |
| A control system and method of operating the control system are provided, the system having a supervisory circuit for detecting failure of the system and disabling a high energy control circuit of the system, the supervisory circuit having a capacitor therein for sustaining an on con |
| 4899034 |
Method of operating a control unit |
February 6, 1990 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 4829161 |
Control unit and method of making the same |
May 9, 1989 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 4782215 |
Control unit and method of making the same |
November 1, 1988 |
| A temperature regulating control unit and method of making the same are provided, the unit comprising a RTD temperature sensor, a unit for applying electrical signals to the sensor, and a microcomputer for receiving digital signals from the sensor in relation to the temperature being |
| 4628439 |
Supervised start system for microprocessor based appliance controls |
December 9, 1986 |
| A supervised start system for microprocessor based appliance controls and effective to prevent unwanted start operation of the associated appliance due to failure of a critical component of the starting system. The starting system requires a mechanical operation to effect starting of the |
