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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 7116210 | Actuator with integral position sensor An actuator and integral position sensor has increased reliability with a fail-safe mode. The actuator and sensor assembly includes a rotary actuator that has a driving shaft. A sensor rotor has the driving shaft mounted in a bore. A contactor is mounted to an outer... | 10/03/2006 |
| 7079005 | Mechanically buffered contact wiper An electric device contains a medium interposed between first and second electric elements to provide electric continuity between the first element and a defined reference point of the second element throughout a defined range of sliding travel of one of the element... | 07/18/2006 |
| 6639507 | Plated precision potentiometer A plated precision potentiometer (PPP), consists of resistance plates, disc, a screw, springs and a cylinder to enclose all moving parts. The PPP will produce a resistance determined by the location of the disc on the plates. The disc will travel on the s... | 10/28/2003 |
| 5818324 | Wire coil potentiometer wiper A miniature potentiometer having a housing with a plurality of resistor elements and a coil spring wiper having canted coils affixed to a knob that is rotatably disposed within the housing. The canted coil spring wipers are in conductive contact with the ... | 10/06/1998 |
| 5570076 | Variable resistance device The present invention provides a variable resistance device having at least one pair of channels retaining a conductive ball between them. The channels contain a resistive element and a conductive element and movement of the conductive ball within the cha... | 10/29/1996 |
| 4975677 | Guided variable resistor A variable resistor including a resistive element and a conductive element supported by a plate. Contacting terminals are provided on one or more ends of each element. A carriage is slidably supported above the elements and a conductive roller is supporte... | 12/04/1990 |
| 4878040 | Variable resistor A variable resistor includes strip-shaped conductive and resistive elements on an insulator plate. A cylindrical-shaped, conductive roller element can be rolled over the conductive and resistive elements to vary resistance. Thereby, substantially all slid... | 10/31/1989 |
| 4794359 | Variable transformer A variable transformer comprising an annular core with a winding which at the end surface of the core is provided with a circular contact path to be connected with a current brush mounted on a rotor (7). The current brush consists of a contact roller jour... | 12/27/1988 |
| 4032880 | Electrical device An electrical device is disclosed which is small in size and easily assembled. The device employs a rotatable housing and a grooved geometrically programmed disc to locate a ball contact at a desired position on a substrate. The substrate may comprise a r... | 06/28/1977 |
| 4010439 | Planetary potentiometer assembly Multiple resistance elements are mounted in parallel pairs around the inside curved wall of the assembly housing. Multiple cylindrical contacts in a planetary arrangement are rotated by a friction drive surface mounted on the control shaft. Each cylindric... | 03/01/1977 |
| 3995248 | Variable resistance device A variable resistor includes a low-friction contact such as a ball or roller, which may be stabilized by a magnet or trough.... | 11/30/1976 |
| 3964011 | Single turn variable resistance device having a split shaft rotor A single turn potentiometer is constructed as either an open frame or a housed unit. Both units incorporate a helical coil spring wiper mounted within a rotor. In the open-frame unit, the rotor includes a shaft which extends through a corresponding hole o... | 06/15/1976 |
