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3872351 |
Electron guns
In a field emission electron gun means are provided for monitoring the number of electrons that pass through the hole in the first anode of the gun and form the useful beam, these means being used...
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3825839 |
CONSTANT CURRENT FIELD EMISSION ELECTRON GUN
An improved field emission type electron gun is automatically controlled so as to generate a stable emission current. The preferred embodiment employs a detecting means for detecting the emission...
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3819981 |
AUTOMATIC START CIRCUIT FOR LAMP
An automatic start circuit for a gas-filled tube having an anode and a cathode, such as a deuterium lamp, the anode thereof being connected to both a voltage source for providing a firing voltage...
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3781598 |
ELECTRIC CURRENT CONTROL APPARATUS
A current control system particularly useful but not limited to high voltage non-linear load devices wherein a vacuum tube, connected in series relationship with the load device and a DC power...
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3760279 |
BEAM CURRENT LIMITING CIRCUIT
A circuit for limiting the current supplied to the cathode of a grid controlled electron beam gun welder. When the current attempts to rise above a predetermined level because of a change of bias...
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3727101 |
LASER LAMP FAILURE DETECTION METHOD AND MEANS
Imminent failure of a lamp pump for a laser is anticipated by detecting a change in a physical dimension of the lamp normally occuring just prior to a failure. This change in physical dimension can...
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3720861 |
FLUORESCENT LAMP IGNITING CIRCUIT
A transistor is between, and in series with, the heating filaments of a fluorescent lamp, to allow current flow therethrough when power is initially applied to the circuit. A predetermined time...
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3705311 |
REGULATABLE CONTINUOUS HIGH VOLTAGE GENERATOR
A regulatable continuous high voltage generator has a source of alternating voltage with the primary winding of a transformer connected thereto through a variable gain modulator. A first secondary...
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3699381 |
ION SOURCE DEVICE HAVING CONTROL MEANS FOR REDUCING FILAMENT CURRENT BELOW ITS STARTING VALUE
An ion source device of the Duoplasmatron type has a current reduction resistor in the filament circuit thereof for reducing the filament current during steady state operation thereof, and a relay...
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3689798 |
DEVICE FOR AUTOMATICALLY CONTROLLING ELECTRICAL CONDITIONS OF AN ELECTRON BEAM UNIT
A device for automatically controlling electrical conditions of an electron beam unit having an electron gun wherein a main cathode is heated by a current of electrons emitted by an auxiliary...
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3681653 |
CONTROLLED HIGH VOLTAGE LIGHTING SYSTEM FOR GASEOUS-DISCHARGE LAMPS
A lighting system for gaseous-discharge lamps for applying high voltage pulses to ignite the lamp and for discontinuing the application of high voltage pulses when the lamp is operating. The system...
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3668465 |
SURGE VOLTAGE PROTECTION FOR CATHODE RAY TUBE DRIVERS
Disclosed in a transient voltage protective network for protecting the transistor of a video amplifier coupled to one of the input terminals of a CRT electron gun from the arcing voltages appearing...
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3659143 |
VARIABLE RESISTANCE TIME DELAY CIRCUIT UTILIZING A COINCIDENCE CIRCUIT
Apparatus for automatically delaying operation of electronic circuits until he filaments of vacuum tubes therein are near operating temperature. A variable resistance filament receives a constant...
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3631317 |
SYSTEM FOR LIGHTING A FLUORESCENT LAMP
A system for instantaneously lighting a fluorescent lamp is disclosed which includes a capacitor, a pulse transformer having primary and secondary windings, and a diode and silicon symmetrical...
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3611017 |
REGULATED MAGNETRON POWER SUPPLY
A means for regulating a magnetron power supply in which a portion of the magnetron power is used to energize a lamp. As the power increases the lamp will glow brighter. A photocell senses the glow...
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3576465 |
IONIZATION GAUGE CONTROL WITH EMISSION RESPONSIVE CONTROL OF THERMIONIC FILAMENT HEATING
Ionization guage control for thermionic emission vacuum devices such as ionization gauges used in measurement of gas density and the like. The control comprises an overpressure control operative...
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3549942 |
CIRCUIT ARRANGEMENT FOR DELAYED CONNECTION OF A MAGNETRON TO THE HIGH VOLTAGE,AND INCLUDING AN RC NETWORK IN ITS INPUT CIRCUIT
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3529207 |
FLUORESCENT LAMP CONTROL
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3527947 |
DENTAL X-RAY TUBE STABILIZER HAVING A CONTROL SWITCH IN THE FILAMENT CIRCUIT
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3459941 |
INSTANTANEOUS OVERLOAD PROTECTOR FOR AN X-RAY TUBE RESPONSIVE TO A COMBINATION OF TUBE FACTOR SETTINGS
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3450880 |
ARRANGEMENT FOR THE SEPARATE REGULATION OF THE TUBE CURRENTS FOR A PLURALITY OF X-RAY TUBES
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3442252 |
HIGH VOLTAGE D.C. CONVERTER CATHODE SUPPLY CIRCUIT HAVING MEANS FOR CONTROLLING THE VOLTAGE TO THE CATHODE
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3413517 |
Filament current control by a superposed dithering voltage
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3407333 |
Self-regulating emission control by a high leakage type transformer
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3377506 |
Electromagnetic current control for a hollow cathode
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3358182 |
Automatic degaussing circuit with stand-by tube-filament-heater circuit for color television receivers
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3350653 |
Thermionic electron tube circuit
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3346769 |
Orbiting vacuum pump power supply with a filament current regulator
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3333151 |
Regulated power supply with plural outputs for tube filaments and transistors
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3315124 |
Transistorized constant emission current regulator using a resonant transformer in the power supply
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3292090 |
Ion gauge system having overload protection
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3290941 |
Electron discharge devices with automatic temperature control
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3275883 |
Emission current regulator for ion gauge
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3265917 |
Fail-safe arc discharge lamp with integral arc extinguishing means
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3259793 |
System for controlling the over-voltage or "hot shot" time on instant heating tubes
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3219929 |
Thermionic square law indicating device wherein cathode power dissipation is maintained constant to provide an indication of the magnitude of the unknown signal
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3197634 |
Delayed warm-up filament power supply for mass spectrometer with emission current regulation
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3192436 |
Heater switching cathode for magnetrons
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3171061 |
Resistor-ceramic control network for fluorescent lamp starters
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3112435 |
Surge protection circuit
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3092755 |
High power vacuum tubes
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3078388 |
Method and apparatus for controlling electrical discharges
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3072822 |
Emission current regulator
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3066241 |
Apparatus for operating gaseous discharge lamps from a d.c. source
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3017564 |
Protective circuit
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2964677 |
Temperature stabilization of electronic tubes
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2954470 |
Mass spectrometer and method
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2949565 |
Direct current to alternating current inverter
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2945160 |
Emission regulator
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2940010 |
Automatic control circuit
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