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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 8142158 | Compact load path swashplate assembly A swash plate assembly includes a rotationally stationary swash plate and rotational swash plate which rotates relative to the rotationally stationary swash plate through a bearing system. Each servo control rod is attached to the swash plate assembly to communicate... | 03/27/2012 |
| 5468124 | Portable electric fan A portable electric fan includes a rechargeable battery disposed in the bottom portion of a housing for storing and for supplying electric power. An opening is formed in the front portion of the housing for receiving a fan device, the fan device includes ... | 11/21/1995 |
| 5188512 | Helicopter blade pitch control system A helicopter blade pitch control system allows blade pitch to be controlled with regard to the degree of rotational position of the blade with respect to the direction of travel and also the degree of pitch. The invention provides an improved arrangement ... | 02/23/1993 |
| 5159620 | Variable pitch propeller apparatus The invention relates to a propeller assembly, particularly suitable for use with axial flow pumps. The propeller assembly is provided with a cam-operated rotatable propeller blade compression shaft which rotates in response to a detected increase load on... | 10/27/1992 |
| 4231317 | Boat propeller device The invention relates to a boat propeller having rotatably journalled blades in its hub to enable shifting between forward and reverse without reversing the direction of rotation. The hub is rotatably journalled on the propeller shaft and contains a trans... | 11/04/1980 |
| 4066911 | Wind-driven prime mover A sail-type wind-driven prime mover is provided in which the area of the sails facing into the wind is adjustable. The prime mover comprises a drive shaft from which depend radially extending front and rear masts which support flexible sails. The area of ... | 01/03/1978 |
| 4044971 | High speed, long range turbo-jet aircraft An aircraft forwardly propelled by a power plant including a pair of jet engines, is operated in a VTOL mode by powered rotation of a rotary wing mechanically rotoring the engines. When unloaded during fixed wing flight, the power plant is operated in an ... | 08/30/1977 |
