Abstract: The invention relates to a high-voltage generator for supplying two different output voltages or output currents, particularly for X-ray tubes whose anode current deviates from the cathode current. Symmetrical output voltages can be obtained during operation of this device, despite asymmetrical loads to the anode and cathode, by using a resonant direct current/alternating current converter with a capacitor circuit which is discharged through two different primary windings. The discharge through one primary winding takes place with a preferably adjustable delay with respect to discharge through the other primary winding.

Abstract: An X-ray apparatus comprising a step-down transformer for stepping down a line voltage, a first timer for generating a pulse signal of the pulse width corresponding to a preheating period in response to a start signal, and a second timer for generating a pulse signal of the pulse width corresponding to an X-ray radiation period in response to the stoppage of the output of the pulse signal of the first timer. The stepped down line voltage is impressed on an X-ray generator during the period of time, i.e., the preheating period for generating the pulse signal of the first timer to preheat an X-ray tube. The line voltage is impressed on the X-ray generator during the period of time for generating a pulse signal from the second timer to supply a rated tube voltage and filament voltage to the X-ray tube. At this time the X-ray tube radiates an X-ray.

Abstract: In an exemplary embodiment, the secondary parts of the high voltage transformers each are connected with a respective doubler circuit formed of rectifiers and capacitors. All components are arranged in a single oil-filled receptacle which has a radiation exit window for transmitting the x-radiation. The two high voltage transformers are disposed symmetrically relative to the radiation exit window in proximity to respective receptacle sidewalls and adjacent the x-ray tube. The rectifiers and capacitors are disposed above the x-ray tube and symmetrically relative to the radiation exit window.

Abstract: Signal as the milliampere and/or kilovolt signals are monitored from the X-ray tube system via the high tension transformer thereof. These signals may be connected to a heat unit indicator or a calibration meter or both. With the heat unit indicator, the heat level in an X-ray tube anode is monitored and referred to the level corresponding to the ambient room temperature as zero reference. As successive single exposures or series of exposure are made, the X-ray tube heat loading is automatically monitored and displayed so that the operator is aware of the situation at all times. The cooling characteristics of the tube are automatically taken into account and reflected in the reading. If desired, a calibration meter may be connected to the signal derivation circuitry to measure and indicate readily and easily, a plurality of operating parameters.

Abstract: This device feeds back an output proportional to the electric current flowing through an X-ray tube to a filament current controlling means, reads out a difference between the increase and decrease in the current of the X-ray tube made by the effect of charge on the wall of the X-ray tube, and constantly stabilizes the current in the tube at the optimum value by increasing and decreasing a filament current in response to the difference read out.

Abstract: In the exemplary embodiment the temperature-dependent resistance of the cathode coil is taken as the measure of the instantaneous coil temperature and is employed for the purpose of dimensioning an increased filament power in the transition time between fluoroscopy and radiography, or for the purpose of dimensioning a heating pause in the transition time between radiography and fluoroscopy, respectively.

Abstract: A cable guide for X-ray scanners includes an elastomer-coated guide roller which rolls between concentric, parallel drums one end of the cable being fastened to one drum and passing around the roller.