"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 4168048 | Eddy current nutation damper with progressive damping factor A nutation damper apparatus capable of damping small nutation angles in a satellite. A permanent magnet mounted on the free end of a pendulum arm oscillates back and forth parallel to an adjacent conductive plate in the form of a circular segment having a... | 09/18/1979 |
| 4164987 | Control device for the deceleration of a heavy vehicle The invention relates to control devices for electrical, hydraulic or other forms of decelerator for heavy vehicles. For the purpose of avoiding skidding of the wheels of the vehicles when empty, in the case of a false maneuvre by the driver, the devices ... | 08/21/1979 |
| 4122922 | Infinitely variable wear-free eddy current and/or hysteresis brake, preferably for track-bound vehicles An eddy current or hysteresis brake, preferably for track bound vehicles which is infinitely variable and wear-free. A cylindrical rotatable permanent magnet magnetized on its diameter is arranged between a pair of pole pieces in combination with the plur... | 10/31/1978 |
| 4110670 | Braking apparatus A brake apparatus is disclosed in which a rotary shaft coupled to a load to be rotated is rotatably supported by a plain bearing and a biasing device is located near the shaft to bias or move the shaft to the biasing device to applying braking force to th... | 08/29/1978 |
| 4049985 | Damping device for a stepper motor A device for damping the natural oscillations of the rotor of a stepper motor. A permanent magnet is fixed to the rotor and magnetically coupled with an inertia mass constructed of material with distinct hysteresis. The rotor is damped by conversion of me... | 09/20/1977 |
| 3995724 | Centering device for a rail brake magnet unit A rail brake magnet unit on a vehicle comprising separate rail brake magnets or a plurality of rail brake magnets connected together by a frame is vertically movable between a lowered operative position and a raised inoperative position. On approximately ... | 12/07/1976 |
| 3987873 | Brake mechanism A brake mechanism, applicable to the braking of trailer vehicles, has an electro-magnetic arrangement which is disposed between the inner ends of coaxial wheel supporting shaft units to selectively and individually control the rotation thereof. Each shaft... | 10/26/1976 |