Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7259492 | Rotor axial activation modulation of electric machinery due to reverse torque The invention involves installation of a helical nut structure, or a helical nut and ball or roller bearing structure, between an electric machinery transmission shaft and a driven transmission element. Depending on the torque between the electric machinery rotor, a... | 08/21/2007 |
| 7253680 | Amplifier system with current-mode servo feedback A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermine... | 08/07/2007 |
| 7218018 | Actuator An actuator includes a casing, a stationary member having a coil member and mounted in the casing and a movable member having a moving element and supported by the casing. The moving element has a shaft and is supported by the casing so as to be moved in an axial di... | 05/15/2007 |
| 7118506 | Actuator for active front steering system A active steering apparatus includes a housing, an input shaft, an output shaft, and an electrical motor. The electric motor has a stator fixed to the housing and a rotor. A first gear set interconnects the input shaft and the output shaft and includes a sun gear fi... | 10/10/2006 |
| 7078965 | Servo balancing among driver devices A method and apparatus for reducing imbalances among the outputs of a plurality of driver devices connected in a parallel configuration to drive a common load. One driver is designated as the master, and suitable servo circuitry is provided to each of the other slav... | 07/18/2006 |
| 4578621 | Stock advancing apparatus with dancer operated potentiometer speed control A stock reel having a variable speed electric reel drive motor and a speed control potentiometer operated by a stock loop control arm for producing a variable control voltage correlative with the angular position of the control arm. The control voltage fr... | 03/25/1986 |
| 4303875 | Device for the remote control of the angular position of an aerial rotor A device for the remote control of the angular position of an aerial rotor comprising a d.c. motor for the rotation of the rotor and a drive circuit adapted to cause the rotation of the motor in one direction when it receives as input a d.c. voltage highe... | 12/01/1981 |
| 4300080 | Power driver control circuit for servo actuator A power driver control circuit (38) provides control signals (44, 46, 48, 50, 52, 54) for switching transistors in a power driver (56) for an electromagnetic actuator (11) of the type used for controlling a servo head (12) in a closed loop servo system. T... | 11/10/1981 |
| 4290000 | Power amplifier with current limiter circuit A power amplifier is disclosed for controlling the current flow through a load, such as a d-c servo motor. The amplifier includes a plurality of switching elements connected in bridge fashion with the load and a predetermined power source for coupling the... | 09/15/1981 |
| 4282467 | Controller system for rotary actuator This invention relates to the hydraulic control field wherein an electronic controller provides the necessary electrical elements for controlling the movement of an actuator shaft from one pre-selected position to another pre-selected position at a pre-se... | 08/04/1981 |
| 4220903 | System for guiding a tool A system for guiding a tool according to a predetermined direction includes a detector head which photoelectrically scans a line of the pattern with the line varying in width at predetermined locations and with the output signals of the scanning photorece... | 09/02/1980 |
| 4112343 | Bidirectional self balancing bridge The disclosed system includes a direct-current bridge circuit and a bridge-balancing reversible motor coupled to the bridge circuit, together with a differential high-gain amplifier which is responsive to even slight bridge unbalance to polarize the motor... | 09/05/1978 |
| 4057755 | Thermal conductivity detector circuit There is disclosed a circuit which supplements a bridge-type detector circuit in order to minimize non-linearities resulting in measurements of thermal conductivity by such type bridges. An auxiliary voltage source is described which has an adjustable out... | 11/08/1977 |
| 4054825 | Control arrangements A control arrangement is described for angularly positioning a member such as an aerial structure in which a potentiometer has a continuous circumferential winding with two sets of tappings of at least two tappings and at least three tappings respectively... | 10/18/1977 |
| 3975669 | Electronic damper motor control There is disclosed a motor control circuit that is particularly useful for the control of a damper motor in a heating and ventilating system. The control circuit comprises a bridge circuit having a pair of operational amplifiers with cross connected input... | 08/17/1976 |
| 3963051 | System for the remote control of the jack cylinders of a hydraulically operated crane A remote control system for the jack cylinders of a hydraulically operated crane includes a plurality of regulating valves for controlling respective jack cylinders, the regulation of each valve being controlled by the movement of a respective valve spool... | 06/15/1976 |
