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8536820 Modular electric socket assembly and assembly method thereof  
A modular electric socket assembly comprises a male plug unit electrically connected to a cover plate member having at least one electric socket, and a female plug unit retained in a wall and...
7656105 Wireless signal transmission device for a DC brushless ceiling fan motor  
A wireless signal transmission device for a DC brushless ceiling fan motor that includes a wireless signal transmission device to receive and transmit a signal to a controlling unit, and the...
6504335 Automatic adjustment method of the concealed main shaft dynamic balance  
A method is designed to adjust automatically the dynamic balance of the main shaft of a processing machine. The method involves the use of a micro-electromechanical technique for a precision...
6338024 Industrial machine having abnormal vibration detecting function  
An industrial machine in which vibration exerted on a position detector provided for an axis of the machine is detected and countermeasures against the vibration can be swiftly taken. A ball screw...
5900710 System for coupling control columns  
The present invention relates to a system for coupling at least two control columns (2A, 2B) of a control device (DC) of a machine, especially an aircraft. The coupling system includes for each of...
5831401 Impedance controller  
The system disclosed herein controls the vibratory energy radiated from a structure subject to excitation from an outside disturbance by enforcing a preselected mechanical impedance upon at least...
5425237 Counterbalance system  
A machine with a movable element, such as a machine tool and its spindle carrier, that is powered by a motive means to move the element is provided with a counterbalancing system having at least...
4516062 Actuator  
This invention is directed to an actuator which is particularly adapted among many other possible uses, or use in adjusting the configuration of deformable mirrors. The actuator comprises a...
4310841 Signal handling apparatus  
Signal-processing apparatus for use with industrial instrumentation systems and the like, and comprising a memory to maintain a signal level for long time periods without drift. An input signal...
4274039 Servo-amplifier circuit  
A circuit for a servo-amplifier saves power when the position servo has reached balance. The servo input is a high frequency differential transformer having its armature positioned by mechanical...
4200828 Pivoted arm control arrangement  
Apparatus for controlling the movement of a phonograph arm, pivoted for movement in horizontal and vertical planes, so as to maintain a desired stylus pressure. Displacement of the stylus...
4105961 Phonograph pick-up arm control arrangement  
This invention relates to arrangements for use in controlling the movement of a pivoted arm and it has particular, though not exclusive, application in controlling the movement of a phonograph...
4102202 Electrostatic accelerometer  
A digitally responsive electrostatic accelerometer having a pendulum pivotally movable about a hinge. A pair of torquer electrodes mounted on opposite sides of the pendulum are connected to a...
4099114 Servo stop system  
A servo system is disclosed which produces a mechanical position varying in accordance with variations in an electrical input signal. The input signal is applied by an amplifying channel to one...
4080939 Timing control apparatus for a combustion engine  
Timing control apparatus for varying the ignition timing of a combustion engine in response to changes in engine r.p.m. including a meter having a hand, a gate carried at the end of the hand for...
4060756 Automatic iris control means for variable focal length lens system  
A servo-motor connected with potentiometers to be balanced is used for controlling the diameter of an iris of a lens system of variable focal length. One potentiometer to be used for detecting the...
4035707 Reversible mechanical remote-control device  
A reversible mechanical assembly is remote-controlled in displacements and in efforts by means of a device comprising a motion detector which delivers a pulse each time a driving shaft associated...
4007412 Combined means for sensing an inertial condition and for providing torquing and damping functions  
For use with an inertial sensing device such as a rate gyro, accelerometer or like device, combined means for sensing an inertial condition and for providing torquing and damping functions for...
4006393 Motor control system using a heated member to provide modulation  
A reversible electric motor is caused to modulate a load in response to an off-on condition responsive device, such as a thermostat. The thermostat completes an electric circuit through an...
3994174 Device for measuring the density of liquids  
A device for measuring the density of liquids. A float provided with a piece of soft iron on one side and with a permanent magnet on the other side is movably disposed in a housing through which a...
3988658 Electromagnetic drive assembly for rotary bodies using a magnetically mounted rotor  
An electromagnetic drive for rotary bodies including a stationary member having at least two coils and a revolving member arranged for rotation with respect thereto. The coils are supplied with a...
3984745 Sewing machine stitch pattern generation using servo controls  
A system is disclosed for a sewing machine in which preselected stitch patterns may be formed automatically. Information related to the positional coordination of the needle penetration for each...
3956682 Two-wire position-to-D.C. current transducer  
A two-wire transmitter for converting a motion input into a D.C. milliampere output signal that varies linearly with the angular rotation of a mechanical arm. The transmitter employs a position...
3936717 Force balance transmitter and parts therefor or the like  
A force balance transmitter having a frame and a process element carried thereby and being provided with a movable part adapted to move in response to certain changes in the process, the...
3922591 Heated wire servo motor control system  
An electrical positioning device utilizing a temperature responsive material exhibiting contraction-elongation characteristics in response to an increase or decrease in temperature to vary the...
3912997 Bias and scale factor temperature compensation networks, for use in a force rebalance system  
Bias and scale factor compensation networks for use with transducers which provides compensation in the transducer output for temperature induced output bias and scale factor changes. The network...
3868556 METHOD AND APPARATUS FOR CONVERTING A FORCE OR MECHANICAL MOVEMENT INTO AN ELECTRICAL QUANTITY AND SERVO-SYSTEM EMBODYING SAME  
The invention relates to a method for converting a force into an electrical quantity according to which a force is applied to the winding of an electro-magnetic assembly to tend to displace it,...
3864614 ELECTRO-MAGNETIC POSITION TRANSDUCER FOR A THERMO-ELECTRIC LINEAR MOTOR FORCE REBALANCE SYSTEM  
A position transducer comprising a magnetic circuit carrying a-c flux produced by an exciting winding. The magnetic circuit is interrupted with an air-gap into which extends an...
3863124 AERODYNAMIC SPACING CONTROL APPARATUS FOR MAINTAINING A DESIRED SPACING BETWEEN A SIGNAL TRANSDUCER AND A RECORDING SURFACE BY SENSING ELECTRICAL NOISE  
Spacing control apparatus for maintaining the spacing between a signal transducer and a magnetic recording surface. A spacing control device having a surface which is deformable in a direction...
3857081 PROPORTIONAL SOLENOID ACTUATOR  
A solenoid device which provides an output force proportional to input signal amplitude regardless of the position of the solenoid plunger is disclosed. A flux measuring device is located in the...
3845348 DIFFERENTIAL PRESSURE TRANSDUCER FORCE MOTOR DRIVE CIRCUIT  
A circuit for controlling a force motor in a pressure transducer. A change in pressure causes a change in the inductance of a coil in the pressure transducer. A Wien bridge oscillator circuit...
3832618 ELECTRONIC DIFFERENTIAL PRESSURE TRANSMITTER  
An electronic differential pressure transmitter for use with industrial processes to produce an output signal suitable for transmission to a remote station for operating, indicating, recording or...
3789285 POSITION CONTROL SYSTEM USING MAGNETIC FORCE  
The position control system using magnetic force, in which at least one pole of an electromagnet is opposed to a magnetic substance of a controlled object through an air gap therebetween so that a...
3761791 VARIABLE CONDENSER COMPASS AUTOPILOT FOR MARINE VESSELS INCLUDING A REMOTE HELM MOTOR AND A LOCAL FOLLOWUP MOTOR  
Disclosed is a marine autopilot including a magnetic compass. Deviations from the compass setting are sensed by a variable capacitor which forms part of a tuned oscillator circuit. The output...
3752189 ELECTRICAL FEEDBACK SERVOVALVE  
An electrical feedback signal for an electrohydraulic servovalve is provided by electrical strain gauge means influenced by the bending of a cantilever beam one end of which is constrained to move...
3735229 ELECTRICAL OSCILLATING SERVO MOTOR CONTROL CIRCUIT ARRANGEMENT  
An electrical oscillating circuit arrangement with variable degree of damping, comprising an oscillating or tank circuit incorporating an inductive circuit element, and an eddy current body which...
3728463 EXPANSION AND CONTRACTION COMPENSATION ARRANGEMENT FOR SUPERCONDUCTING CABLES  
A compensation arrangement for accommodating the contraction occurring in superconducting cables as they are cooled down to the operating temperature. The superconducting cable is of the type...
3720134 CONTROL SYSTEM FOR MACHINE TOOL MEMBERS  
A control system for positioning relatively movable machine tool members comprising a templet secured to one of said machine members, a servo indicator secured to the other of said members and...
3717803 SERVO CONTROL  
A thermostatic bimetal strip heated by an input signal tends to close contacts causing a motor to move a driven device in a predetermined direction, while a cam moved in agreement with the driven...
3710686 DEVICE FOR AN ACCURATE ADJUSTMENT OF TWO APPARATUS PARTS DISPLACEABLE RELATIVELY TO EACH OTHER  
A device for adjusting the relative position of two displaceable members includes two magnets each positional on a different one of the members in such a way that under normal conditions the axes...
3702431 CONDITION RESPONSIVE MODULATING MOTOR CONTROL SYSTEM  
A condition responsive circuit, disclosed as including two temperature responsive elements, is adapted to be connected to a pair of identical amplifiers which are biased to different operating...
3697871 SINGLE ELEMENT ADJUSTMENT FOR SPAN AND GAIN  
In an adjustable span null balance system the input signal is applied to an amplifier. A first feedback voltage related to the output of the amplifier is summed with a second feedback voltage...
3660745 DEVICE FOR ADJUSTING THE MEASUREMENT RANGE OF CAPTORS FITTED WITH FORCE BALANCES PARTICULARLY FOR PRESSURE CONVEYORS  
The device comprises a force balance including several windings, switches being provided for selective connection of any of the windings in the circuit of the force balance to compensate for...
3657630 ELECTRO SERVOSYSTEM FOR A FORCE BALANCING GAUGE  
A very sensitive servosystem is provided for use with measuring instruments or gauges of the type wherein the force to be measured is counterbalanced by an identical force which tends to maintain...
3644816 MANUAL AND AUTOMATIC MASTER-SLAVE CONTROL SYSTEM  
A control system including a slave member and a master member for maintaining the slave member in alignment with the master member in response to the movements thereof. Means are provided for...
3630020 SOLAR ORIENTATION DEVICE  
A servomechanism apparatus which will continuously track a moving heat source through its plane of travel. A plurality of bimetallic elements are connected to a crank on an orientation shaft in a...
3628118 ELECTRICAL CIRCUITRY FOR USE e.g. IN FORCE BALANCE SERVOSYSTEMS  
The invention is concerned with electrical circuitry for ensuring that the mean current through a load, e.g. a force balance winding for a pressure transducer, bears a substantially linear...
3614579 SQUEEZE FILM BEARING SERVOSYSTEM  
A signal transducer which is urged toward a recording medium surface is prevented from contacting the surface by an oscillatory transducer. The oscillatory transducer, which is direct motion...
3527096 ATTITUDE ERROR CORRECTION FOR A FLUID GAUGING SYSTEM  
3457481 FORCE BALANCE SERVO SYSTEM IN WHICH THE RESONANT CIRCUIT AMBIGUITY IS ELIMINATED  
Matches 1 - 50 out of 113 1 2 3 >