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| Number | Title | Issue Date |
| 7262705 | Recessed detector assembly for detecting and venting airborne substances A recessed detector assembly having the capability to detect and evacuate air laden with airborne substances from within the assembly. The assembly includes a detector frame adapted to be flush mounted into a mounting box mounted in a ceiling or a wall, the frame ha... | 08/28/2007 |
| 7261243 | Thermostat responsive to inputs from external devices A thermostat is provided that receives one or more inputs from at least one heating system of a climate control system, and initiates an appropriate action in response to the input. The thermostat can turn off a heat pump providing substandard heat and responsively ... | 08/28/2007 |
| 7033268 | Multi-mode damper actuator A damper actuator for a ventilation damper serves as both a control device for the ventilation damper and a fire and smoke rated device for the ventilation damper. The damper actuator includes a modulating motor controller, a two-point motor controller, and a therma... | 04/25/2006 |
| 6959719 | Fire collar A fire collar or fire damper for location within a concrete slab of a building. The device incorporates a damper arrangement (12) and a heat detector (18, 19) comprising a metal alloy or lead which melts when a preset temperature is reached, causing th... | 11/01/2005 |
| 6844691 | Ventilator having an abnormal operation indication device A ventilator having an abnormal operation indication device includes a power supply circuit, a central processing unit, a fan motor, and a load sensing circuit. Thus, the load sensing circuit detects the abnormal operation signals through the sensor, so that the abn... | 01/18/2005 |
| 6072397 | Method and apparatus for reducing flame emissions from an electronics enclosure A method and apparatus which reduces flame emissions from an electronics enclosure in the event of a fire within the enclosure. At least one fan is utilized to provide air flow along an air flow path between an air intake port and an air exhaust port of t... | 06/06/2000 |
| 6055848 | Air quality measuring device The present invention provides a device for measuring air quality. The device includes at least one sensor with a sensor resistance which is converted via signal processing into an output signal, the gas sensing or air content sensing device having its se... | 05/02/2000 |
| 5171184 | Tensioned fire damper assembly and method A tensioned fire damper assembly and method are disclosed. The assembly includes a damper tensioning frame for tensionably mounting a fire damper within a duct or other mounting aperture, thereby allowing substantially unrestricted thermal damper expansio... | 12/15/1992 |
| 5153563 | Fire sensing system, process for sensing fire and environment monitor A fire sensing system, a process for sensing a fire and an environment monitor are disclosed. The system includes infrared sensors with sensing wavelength bands sensing an infrared radiation from an infrared source. One of the sensing wavelength bands is ... | 10/06/1992 |
| 4958687 | Fire damper A fire damper having a duct, a flap rotatable about an axis crossing the duct, an engaging member, and a spring ordinarily urging the flap to rotate in a direction. The fire damper has a trigger mechanism comprising a leaf spring fixed to the flap and hav... | 09/25/1990 |
| 4911065 | Damper with override control A fire and smoke damper equipped with a thermal responsive electric switch for closing the damper responsive to the elevation of the ambient temperature above a first predetermined level. Control circuitry is provided for permitting selective override of ... | 03/27/1990 |
| 4903894 | Ventilation control procedure and ventilation control means The invention concerns a displacement ventilation control procedure in which the impurity and/or moisture concentration of the air containing impurities which accumulates in the part of the room or hall space above the staying zone and/or their changes an... | 02/27/1990 |
| 4867376 | Air control system An air control device, having a panel which opens and closes in response to changes in environmental conditions in a building, preferably is sized to replace a ceiling tile in a conventional drop ceiling. The air control device may be responsive, for exam... | 09/19/1989 |
| 4817912 | Bi-metal operator for smoke, fire and air control damper A damper operator for use with a damper having a frame and a damper blade pivotally associated with the frame, which damper operator comprises a bi-metallic element provided with a heating pad which may be remotely activated to control the damper. The bi-... | 04/04/1989 |
| 4463896 | Methods and apparatus for the control of smoke and fire in buildings Smoke and fire control devices and systems are disclosed, including smoke control devices which are responsive to smoke to evacuate smoke and also responsive to elevated temperatures to terminate the evacuation of smoke. Other disclosed smoke control devi... | 08/07/1984 |
| 4432272 | Motor operated fire damper A fire and smoke damper having an electric motor coupled with the damper to hold the damper blades open when the motor is energized. A spring associated with the motor provides torque for closing the blades when the supply of electrical energy to the moto... | 02/21/1984 |
| 4181253 | Ceiling air diffuser and induction apparatus The diffuser has outwardly flared lower side walls and an upper vertical wall portion adapted to receive primary air from a supply source. The vertical portion includes a lower extension into the space defined by the lower flared side walls, and the lower... | 01/01/1980 |
| 4084744 | Fire damper The fire damper of this invention is to protect sensitive areas and equipment from fires which originate in the process of a plant. The invention, for example, may have utility in the protection of bag house filters and the like. It will, however, by way ... | 04/18/1978 |
| 4080978 | Smoke, fire and air control damper A rotating blade, smoke, fire and air control damper with spring closures attached on both inside and outside surfaces of the blades is disclosed. The spring closures cooperate with a bimetallic heat sensing device to trigger the closing of the blades at ... | 03/28/1978 |
| 4058253 | Method and apparatus for conservation of energy and containment and evacuation of smoke in a high rise building Apparatus is provided for use in the method of conserving energy by operating a ventilating and air conditioning system in a high rise building in a manner to permit operation of a heating and cooling unit at a reduced percentage of full capacity while ad... | 11/15/1977 |
