Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7249931 | High efficiency air conditioner condenser fan with performance enhancements Twisted blades for outdoor air conditioner condensers and heat pumps that improve airflow efficiency to minimize operating power requirements. The blades can run at approximately 850 rpm to produce approximately 1930 cfm of air flow using approximately 110 Watts of ... | 07/31/2007 |
| 7013969 | Low noise level HVAC system having displacement with induction A displacement ventilation, low noise level, mixed air, HVAC system for ventilating a commercial or educational facility. The system includes a central HVAC air handling unit containing first and second duct works for receiving and transmitting conditioned air to ro... | 03/21/2006 |
| 6715538 | Supply air terminal device The invention concerns a supply air terminal device (10) including a supply chamber (11) for the supply air and in the supply chamber (11) nozzles (12a1, 12a2 . . . ; 12b1 | 04/06/2004 |
| 6102792 | Mixing box for mixing air streams from two tubular channels A dual-channel mixing box (1) is arranged in series with other such mixing boxes in order to regulate the temperature of the air in one room each or in several rooms. Each mixing box is provided with supply pipes (3,4) running through it, in which air of ... | 08/15/2000 |
| 5344364 | Circulation air distribution system A circulation air distributing system for supplying fresh conditioned, hot or cold air through the use of cells metal cellular flooring. Distribution box inserts are uniformly distributed along the cellular flooring units prior to concrete placement. Sele... | 09/06/1994 |
| 5318099 | Method and apparatus for emulating a perimeter induction unit air conditioning system A method and apparatus for emulating a perimeter induction unit, in which the perimeter induction unit is replaced by an emulation unit carried in a plenum above the space to be heated or cooled. A temperature sensor is mounted within the space, and a com... | 06/07/1994 |
| 5236393 | Bypass damper in series-type ventilation fan A series-type fan includes an air intake exposed to both ambient and forced ventilation air, a variable capacity fan, and multiple ports positioned downstream from the fan. One of the ports has a damper attached thereto which closes when the fan is de-ene... | 08/17/1993 |
| 4926839 | Hot air type heater A heater comprising a heater body containing a heating source; an air blower for forcibly blowing off heated air from the heater body into a room, the heated air being produced by heat-exchanging with the heating source; a first temperature detection elem... | 05/22/1990 |
| 4843839 | Positionable economizer An economizer for an air handler, air conditioner or similar unit. The economizer has a first position and a second position. In the first position, the economizer is retracted and presents a relatively flat end surface of the air handler, and in a second... | 07/04/1989 |
| 4677904 | Fluid flow control assembly A fluid flow control assembly which comprises an inlet defining structure through which a fluid medium flows in one direction, a partitioning member for dividing the fluid flow into first and second fluid streams, an outlet defining structure positioned d... | 07/07/1987 |
| 4480533 | Control for vent door A vent door control apparatus for use in an air conditioner that permits both manual and automatic positioning of the vent door. A series of push button function switches are arranged to move in contact with a series of cams to automatically unlatch the d... | 11/06/1984 |
| 4352453 | Fan control for variable air volume terminal unit Disclosed is a terminal unit for an air conditioning system. The apparatus has a common chamber for primary and secondary air and a throttling valve at the primary air duct connection controlled by a zone thermostat. The terminal unit fan is independently... | 10/05/1982 |
| 4281592 | Double induction unit An air induction unit having a first induction means to induce secondary air through a first induction opening into a stream of primary air to produce an air stream of mixed primary and secondary air, and a second induction means to induce additional seco... | 08/04/1981 |
