Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4621681 | Waste heat boiler A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boile... | 11/11/1986 |
| 4426959 | Waste heat recovery system having thermal sleeve support for heat pipe A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boile... | 01/24/1984 |
| 4326344 | Laundry drying system and method A laundry drying system and method in which fresh air flows through a low temperature duct of a preheater, then through a primary heater before entering a laundry drying chamber is described. The air enters into contact with laundry in the chamber, then i... | 04/27/1982 |
| 4103433 | Home laundry dryer A home laundry dryer in which both the fresh air entering a laundry drum and the air exhausted from the drum pass through a thermal recovery unit in the dryer. The unit has a high temperature passage through which the exhaust air flows and a low temperatu... | 08/01/1978 |
| 4020898 | Heat pipe and method and apparatus for fabricating same A thermal transfer system comprising a closed, generally horizontally disposed tubular envelope having heat transfer fins mounted at axially spaced points along its outer surface is disclosed. The interior surface of the tubular envelope has a large numbe... | 05/03/1977 |
