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System for magnetically attaching templeless eyewear to a person
A system of eyewear that eliminates the need for hinges on the frames of the eyewear.
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| Number | Title | Issue Date |
| 8026688 | Driving device In order to provide a driving device that is capable of eliminating sticking of a movable member due to nonuse, the driving device includes a drive shaft that reciprocates in axial directions with expansion and contraction of an electromechanical transducer element,... | 09/27/2011 |
| 7872436 | Control method for a robot An apparatus, a method and a control system for controlling an industrial robot with at least one axis of rotation and/or translation. The robot includes at least one actuator or motor at each of the axes for driving a movement of an arm of the robot and at least on... | 01/18/2011 |
| 7062160 | Monitoring current in a motor during acceleration to verify motor frequency lock Method and apparatus for accelerating a motor from an intermediate velocity to a final operational velocity. The motor is accelerated from rest to the intermediate velocity through application of fixed duration drive pulses to the spindle motor. Once the motor reach... | 06/13/2006 |
| 7042187 | Control apparatus for electric actuator A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction... | 05/09/2006 |
| 7012396 | Increased digital spindle motor control resolution through dither A motor controller provides pulse width modulated drive signals to a motor. A digital demand code for controlling motor speed is input to the motor controller. A dither generator generates a digital dither value, which an adder adds to the demand code to generate a ... | 03/14/2006 |
| 6736094 | VCT solenoid dither frequency control A method that uses a dither signal for reducing hysteresis effect in a variable cam timing system is provided. The method includes the steps of: a) providing a dither signal having at least two switchable frequencies; b) determining the frequency characteristics of ... | 05/18/2004 |
| 6476577 | Motor control circuit A motor control circuit 10 which controls the speed of a motor 12 by the use of pseudo-randomly generated signals 52.... | 11/05/2002 |
| 6477445 | Method and apparatus for controlling an industrial robot An equipment for controlling an industrial robot, which robot has a plurality of rotation and/or translation axles (ax 1-6), comprising a motor (15) at each of said axles for generating desired movements of the arms and/or the wrist, of which the robot is... | 11/05/2002 |
| 6392377 | Motor control apparatus and motor control method A motor control apparatus is arranged to drive and control a motor for transmitting the rotating force of the motor through a gear train. In reversing the rotation of the motor, the motor is caused to rotate at a speed higher than a normal rotation speed ... | 05/21/2002 |
| 6060854 | Method and apparatus for compensating for windup in a machine A method and apparatus for compensating for the effects of compliant elements in a positioning system is provided. The amount of compensation to be applied can be determined by measuring the lost motion errors which are prevalent during continuous motion ... | 05/09/2000 |
| 5739658 | Noise dithering system for transistor switched devices A noise dithering system provides gating signals to switching transistors that selectively apply power to an output device in response to the gating signals, wherein said gating signals include a selected level of frequency modulation insufficient to alte... | 04/14/1998 |
| 5710498 | Method and apparatus for friction compensation Compensation for friction affecting motion of moveable machine members is effected in servo control of the member actuators. An estimate of velocity is used in evaluation of a model of frictional force to produce compensation values. Alternative embodimen... | 01/20/1998 |
| 5694016 | Method for controlling a servo system having friction A method for controlling a servo system (10) having friction, in which the non-linear characteristic (20) of the position controller (12) is defined such that the magnitude of the variable Ns, Vs supplied to the servo system (10) having friction in the ca... | 12/02/1997 |
| 5355065 | Adaptive control system A control system for a physical plant has a state output detector for detecting operating conditions of the physical plant. A trajectory production unit produces desired operating conditions of the physical plant, and an error production unit produces err... | 10/11/1994 |
| 5119005 | Controller for non-linear position servo A servo control system (100) for controlling a prime mover (16) to position a load (12) to a commanded position in accordance with the invention includes a position sensor (14) for providing a load position signal representative of a position of the load;... | 06/02/1992 |
| 5012169 | Motor drive system A motor drive system used with industrial robots, processing machines, and the like comprising an external interface part ready for connecting a plurality of kinds of host controllers generating a command signal; a sensor interface part to which a motor r... | 04/30/1991 |
| 5012174 | Method and apparatus for countering vibrations of a platform A dynamic vibration absorber for reducing vibrations of a platform induced by an oscillating mass mounted thereon is provided by mounting a mass of equal mechanical resonant frequency as that of the oscillating mass and oscillating this mass in a manner t... | 04/30/1991 |
| 4998051 | Adaptive control system An adaptive control system, for a plant such as a servo motor, a heat pump and the like where its input distribution matrix is known and the number of effective inputs is the same as the number of independent outputs, comprising: an unknown dynamics value... | 03/05/1991 |
| 4814680 | Servo loop control for a coriolis rate sensor dither drive A servo loop control for the dither drive of a Coriolis rate sensor is provided. The dither drive includes a pair of electromagnetic coils (70), which are alternately energized to dither a parallelogram frame (50), on which first and second accelerometers... | 03/21/1989 |
| 4777603 | Controller for multiple-axis machine Movement of a tool relative to a workpiece along each one of a plurality of axes is controlled by digitally providing a train of digital pulses to an electromechanical actuator and by digitally modulating the pulse widths (without an intervening conversio... | 10/11/1988 |
| 4733150 | Device and method for compensating the gravitational effect on an element, raisable and lowerable by an electric motor, of a machine tool or of a robot For use with overhead axes of a machine tool or the axes which ride astride one another of a robot, the gravitational effect can be eliminated for controlled drives if a control variable which opposes the gravitational effect is inserted into the control ... | 03/22/1988 |
| 4727303 | Positional control method and system utilizing same A control system and method including an integrator coupled with a rate-varying multiplier which operate in parallel with a conventional controller. Because the integration is rate-variable, the resulting control system has the benefits of an integral pos... | 02/23/1988 |
| 4540923 | Adaptive servomotor controller The gain of a servomotor driven process control system is adaptively compensated for changes in the motor coulomb friction torque. The gain is manually adjusted at the time of installation. Thereafter, the minimum motor current occurring in a process cycl... | 09/10/1985 |
| 4445779 | Dither system for a spring mass system A dither motor system is described for a ring laser angular rate sensor which forms part of a spring-mass system. The dither motor system of the present invention provides selected control of the peak clockwise and/or peak counterclockwise dither angle of... | 05/01/1984 |
| 4409531 | Method and a device for increasing the linearity of a servo system The invention relates to a method and a device for increasing the linearity of a servo system, for instance a gun servo. The servo system comprises an oscillator (6) having a fixed frequency for superimposing a so-called dither signal on the control signa... | 10/11/1983 |
| 4350939 | Spindle orient device A signal generating means including a half-round magnet attached to the spindle of a machine tool and mounted relative to a first reference indicator and a pair of opposingly mounted magnetic switches magnetically coupled to the magnet and mounted to a st... | 09/21/1982 |
| 4105938 | Proportional pulse controller An electrical actuator such as a direct current solenoid or motor is energized by a square wave voltage having an amplitude which applies full operating voltage to the actuator during each pulse. The duty cycle of the applied voltage is variable between p... | 08/08/1978 |
| 4104572 | Servo system temporary destabilization circuit and method A servo system has a moving member supported for movement therein and a pickoff device for sensing the position of the moving member relative to a reference position. The pickoff provides a position output which is connected to an attenuator at the input ... | 08/01/1978 |
| 4074178 | Time limited digital oscillator A circuit for providing an oscillatory driving signal from the point in time when power is supplied to a predetermined point in time thereafter. A force balance transducer having a pick-off device with a stationary member and a moving member mechanically ... | 02/14/1978 |
| 3944907 | Zero deadband four-quadrant full-wave converter A four-quadrant full-wave static converter having improved time response without current cross-over deadband. An alternating current wave is imposed on the direct current input signal, which generates gate pulses for appropriate thyristors at the desired ... | 03/16/1976 |
| 3939388 | Self-balancing instrument A multi-range, self-balancing instrument using a Zener diode circuit and a phase compensating circuit is disclosed. The Zener diode circuit is capable of generating a white noise, which is effectively applied to the self-balancing system whereby the dead ... | 02/17/1976 |
