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7459869 |
Driving apparatus of motor
A driving apparatus of a motor capable of operating a motor of a reciprocating compressor stably by using a simple power voltage control unit. The apparatus includes a power voltage control unit...
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5266854 |
Electromagnetic transducer
In the electromagnetic transducer disclosed herein, first and second magnetic core structures are oriented in opposition with a space therebetween. In the space between the core structures, an...
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4939432 |
AC/DC automatic changeover and automatic charge device
The AC/DC changeover device automatically changes from AC to DC current by setting a TRIAC on or off, to supply DC from a battery in the absence of AC, for powering an air pump for an aquarium.
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4636695 |
AC/DC electro-magnetic device for aeration pump in fish globe or the like
An electro-magnetic device for an aeration pump for use in a fish tank or the like. The device includes a switch permitting the device to be operated with AC power, or with DC power and further, it...
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4460854 |
Control device for a vibrating armature motor
A vibrating armature motor, which includes a voltage source, an armature, an electromagnet having at least one exciter coil disposed adjacent the armature, a spring for rotationally biasing the...
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4308475 |
Solenoid pump adapted for noiseless operation
A solenoid-actuated fluid pump having reciprocable armature operable by a magnetic circuit and with structure in the flux path at the upper and lower air gaps to substantially change the reluctance...
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4291258 |
DC Excitation control for linear oscillating motors
A control method and system for quasi-proportionally controlling the magnitude of DC excitation current supplied to the DC field coil windings of a linear reciprocating motor in proportion to the...
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RE30068 |
Pulsating torque apparatus and method
An electrical apparatus producing pulsating high torque rotational vibration movement combined with a slow superimposed unidirectional rotary motion is disclosed. The apparatus includes an...
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3891907 |
Actuating mechanism for sliding doors
An actuating mechanism for a sliding door driven by a linear motor comprising a slidable bar coupled to the door, for moving the door into closed and open positions, and a dual stator having the...
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3670223 |
METHOD AND APPARATUS FOR PRODUCING VIBRATIONS OR IMPULSES
This device for producing vibrations, oscillations or impulses to be converted if necessary into unidirectional impulses or into linear movements comprises a reversible magnetic yoke and core...
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3605080 |
ELECTRODYNAMIC SONAR PROJECTOR
A compact, high-power, electromechanical transducer having a reduced iner for efficient, low frequency transmission of sonar energy is provided, and includes a pair of coaxially disposed,...
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3518463 |
LOW INERTIA HIGH THRUST VIBRATOR
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3462666 |
LEVITATED RECIPROCATING MOTOR
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3353040 |
Electrodynamic transducer
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3343012 |
Oscillating motor
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3329909 |
Apparatus for producing mechanical oscillations suitable for controlling sweep circuits and other devices
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3238397 |
Electrical reciprocation apparatus
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3040223 |
Oscillatory drive circuit
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2977526 |
Constant voltage a. c. generator
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2960643 |
Electromagnetic harmonic oscillation device
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2917692 |
Electromagnetic vibrator
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2876356 |
Signal seek tuner
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2873383 |
Means for generating pulsating direct currents
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