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3629604 |
PULSE-CONDUCTING CIRCUIT ARRANGED TO DETECT TROUBLES IN ITS OPERATION
A pulse source is operable to deliver pulses having a current value within a predetermined range and a predetermined duration. A detecting circuit is connected to said pulse source and arranged to...
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3628102 |
EXCITER APPARATUS FOR IMPACT MEMBER SOLENOID
A control for current interruption and performance regulation in an electrical solenoid is disclosed. In one embodiment of the invention, solenoid current magnitude is controlled independently of...
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3626254 |
AUTOMATIC SHIFT LINE SWITCHOVER SYSTEM FOR AUTOMATIC TRANSMISSION
An automatic shift line switchover system for use in an automatic transmission for a vehicle which is responsive to electrical signals representative of the load on the engine and the vehicle speed...
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3621293 |
ELECTRONIC DRYER CONTROL
A dryer control including sensing means to contact items being dried to establish a current path therethrough having a resistance which is a function of the moisture content of the items bridging...
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3609732 |
GAS RESPONSIVE SWITCHING DEVICE
A gas responsive switching device for detecting gas concentrations in air which uses a heated semiconductor having two electrodes embedded therein, a resistor connected in series with the...
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3603846 |
CURRENT DETECTOR CIRCUIT
A solid-state current-detector circuit capable of detecting the presence of a predetermined magnitude of AC or DC current in a power cable wherein the current may vary over an extended range which...
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3600639 |
RELAY DRIVER WITH AUTOMATIC TIME DISTORTION COMPENSATION
In combination with a relay, a driving circuit in which the relay drop in and drop out times are made equal in response to abrupt and correspondingly occurring changes of input signal level. An...
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3593035 |
MARGINAL SWITCHING ARRANGEMENT
The arrangement provides two long-tail transistor pairs with paralleled collector outputs and a detecting device branched across the above pair of outputs. The input signal is compared with the...
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3589282 |
HAMMER PROTECTION DEVICE FOR HIGH-SPEED LINE PRINTERS
A protection device for the hammers in a high-speed printer has a comparator which monitors the current flow in all of the hammer drive circuits simultaneously. A logic gate couples the comparator...
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3590334 |
STATIC ECONOMIZER CIRCUIT FOR POWER CONTACTORS
An economizer circuit that can close a power contactor with high current through a relay coil quickly and then go to a state of low holding current with low power dissipation is provided using...
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3582734 |
COIL DRIVER WITH HIGH VOLTAGE SWITCH
A coil driver circuit for ferrite phase shifters in a phased array antenna. The circuit provides for both slow and rapid changes between levels of coil current to effect changes in phase shift by...
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3582718 |
CIRCUIT FOR IMPROVING RELAY PERFORMANCE WITH CURRENT LIMITING
A transistor circuit for controlling energization of a DC relay coil forms a low impedance path through the transistor upon initial application of voltage and allows a fast coil current rise that...
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3581156 |
ELECTRONIC ARRANGEMENT FOR CONTROLLING AN ELECTROMAGNETIC CLUTCH
An automatic clutch control system for use in a motor vehicle includes an engine speed transducer that supplies a speed voltage to a control circuit. A power circuit controlled by the control...
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3579050 |
HIGH-LOW VOLTAGE DETECTOR
A solid-state circuit for monitoring low and high voltage conditions in either direct current or alternating current voltage sources. A single transistor in a current control circuit is biased into...
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3579053 |
MAGNETIZING AND DEMAGNETIZING APPARATUS AND METHOD
Apparatus for magnetizing and demagnetizing, including means for adjustable controlling the current and voltage applied to the object to be magnetized, for thereby controlling the speed of magnetic...
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3577039 |
OPTICAL APPARATUS FOR FLAW DETECTION
There is disclosed an optical apparatus for flaw detection in which a traveling line of light is reflected from the surface of an object to an array of photocells. The outputs of the photocells are...
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3577041 |
OVERCURRENT RELAY CIRCUIT
An overcurrent relay circuit, the pickup value of which is substantially independent of the DC-component in an asymmetrical alternating current, has an input transformer, the magnetic circuit of...
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3573782 |
CURRENT MONITOR
A current monitor is provided for indicating the presence of the short duration current pulses necessary to detonate ordnance devices and simultaneously interrupt the ordnance firing circuit to...
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3569792 |
METHOD AND CIRCUIT FOR RAPID FIELD EXCITATION CONTROL OF ELECTROMAGNETIC DEVICES
The method for rapid field excitation control of an electromagnetic device, which includes converting an alternating multiphase voltage into several mutually superimposed unidirectional voltages of...
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3568004 |
DELAY ENABLE CIRCUIT
A delay enable circuit forming a means for pulsing a high-voltage power sly for a vacuum tube circuit until the cathode is sufficiently heated to allow the tube to function properly. When this...
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3568003 |
VOLTAGE MONITORING CIRCUIT AND METHOD
A PNP and an NPN transistor have their emitters connected. Four potentials to be monitored are connected with appropriate resistances to apply to the two collectors and to the two bases potentials...
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3564286 |
SOLID STATE VOLTAGE MATCHER AND VOLTAGE DIFFERENCE DETECTOR FOR USE THEREIN
Two direct current difference voltages, of opposite polarity, are obtained, one by subtracting a voltage corresponding to the bus from a voltage corresponding to the generator, and the other by...
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3549955 |
DRIVE CIRCUIT FOR MINIMIZING POWER CONSUMPTION IN INDUCTIVE LOAD
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3546573 |
VOLTAGE RANGE LIMITING CIRCUITRY MEANS
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3537757 |
DUAL POLARITY VOLTAGE DISCRIMINATOR
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3538391 |
ELECTRICAL LOAD CONTROL SYSTEMS
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3537087 |
CAPACITOR POTENTIAL SAMPLING AND INDICATING SYSTEM
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3535692 |
SWITCHING MATRIX
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3535587 |
MONITOR CIRCUIT FOR COMBUSTION-POWERED SOUND SOURCE
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3531790 |
ENERGIZED LINE INDICATOR
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3530311 |
VOLTAGE CONTROL MEANS FOR SOLID STATE AC RELAY ELECTRONIC TIMER
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3524133 |
STATIC STATE VOLTAGE AND CURRENT MONITORING DEVICE FOR ELECTRIC POWER CABLE TERMINATIONS
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3495092 |
FAIL SAFE VOLTAGE-TO-CURRENT TRANSLATING CIRCUIT
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3488562 |
CONSTANT SOURCE FOR INDUCTIVE LOADS INCLUDING SERIES CONNECTED NONSATURATING TRANSISTOR AND A TRANSISTOR SHUNTED RESISTOR
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3486068 |
EMERGENCY LIGHTING SYSTEM EMPLOYING DUAL FILAMENT LAMPS AND CHANGEOVER RELAYS
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3480838 |
ELECTROPNEUMATIC BRAKING CONTROL SYSTEM
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3470551 |
FIRE AND SMOKE DETECTOR
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3469150 |
CIRCUIT CONTROLLING THE TOTAL TIME TO REACH MAXIMUM CURRENT VALUE IN AN INDUCTIVE LOAD
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3465208 |
ELECTRIC LEVEL-RESPONSIVE CIRCUITS
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3458773 |
CURRENT NULL DETECTOR
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3456125 |
HIGH SPEED PROTECTIVE CIRCUIT FOR REGULATING TRANSISTORS
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3449574 |
SEMICONDUCTOR CURRENT PULSE CONTROLLER FOR REGULATING THE EXPOSURE PROVIDED BY AN X-RAY TUBE
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3444437 |
CONTROL CIRCUIT RESPONSIVE TO THE SUM TOTAL CURRENT TO A LOAD
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3440493 |
ERROR DETECTION CIRCUIT
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3439228 |
MONITORING DEVICE
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3437988 |
MEANS FOR WARNING OF THE RELATIVE APPROACH OF AN OBSTACLE IN THE PATH OF A VEHICLE
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3436608 |
TRIGGER CIRCUIT FOR INDUCTIVE LOAD
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3424969 |
BATTERY CHARGING CONTROL RESPONSIVE TO RATE OF RISE OF BATTERY VOLTAGE
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3421143 |
VEHICLE LAMP ELECTRICAL WARNING DEVICE
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3419791 |
Level detector for electric current
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