Abstract: A calibration method for a system for powder bed-based generating of three-dimensional components by means of electromagnetic radiation, in particular such as a PBLS system, having a radiation source deflection unit and a raisable and lowerable carrier plate, above which a component is built, where, in order to calibrate the radiation source deflection unit, at least one virtual reference mark is used and, by means of a detector, a target-actual deviation between the virtual reference mark and a beam of the radiation source deflection unit is determined. An improved calibration method is achieved in that the at least one virtual reference mark is projected on a reference surface, which can travel vertically by means of the raisable and lowerable carrier plate, and independently of the vertical position thereof.

Abstract: The present invention relates to a method for predicting, controlling and/or regulating steelworks processes, comprising the steps of monitoring at least two input variables related to a target variable, determining the relationship between the at least two input variables and at least one target variable by means of regression analysis or classification methods, and using the determined target variable for predicting, controlling and/or regulating the steelworks process.

Abstract: A device for protecting a computer peripheral against unauthorized removal includes a signal cord-holding portion having a signal cord holding passage. The signal cord holding portion is transformable between an open condition for receiving the signal cord in the signal cord holding passage or releasing the signal cord and a signal cord holding condition for preventing removal of the signal cord without dismounting from a connector or peripheral. A connecting structure is provided for connecting the device to an object. The signal cord holding portion and the connecting structure are interconnected for securing the signal cord holding portion in the signal cord holding condition if the connecting structure is connected to an object. A device for protecting a computer peripheral against unauthorized removal is also described.

Abstract: A device for protecting a computer peripheral against unauthorized removal includes a signal cord-holding portion (23; 84, 85; 173) having a signal cord holding passage (26; 76, 126). The signal cord holding portion (23; 84, 85; 173) is transformable between an open condition for receiving the signal cord (11, 12; 111, 112) in the signal cord holding passage (26; 76, 126; 176) or releasing the signal cord (11, 12; 111, 112) and a signal cord holding condition for preventing removal of the signal cord (11, 12; 111, 112) without dismounting from a connector or peripheral (9, 10, 27, 28; 127, 128). A connecting structure (25; 75; 142, 143; 175) is provided for connecting the device to an object. The signal cord holding portion (23; 84, 85) and the connecting structure (25; 75) are interconnected for securing the signal cord holding portion (23; 84, 85) in the signal cord holding condition if the connecting structure (25; 75; 142, 143; 175) is connected to an object (2; 30).

Abstract: A desktop stand for a docking station and a portable computer having a keyboard member and a display panel projecting from a rear end portion of the keyboard member. A fastener structure is provided for fastening the docking station to a support structure for supporting at least a portion of the keyboard member. An abutment for engaging the end of the keyboard member remote from the display is located at a distance of and faces the fastener structure when in operative position for fastening the docking station to the support structure. When in fixed condition, the fastener structure or the abutment is releasably fixed and, when in a released condition, allows adjustment of the distance from the abutment to the fastener structure.

Abstract: The camera has a solid-state image sensor (FTD) comprising a pick-up member (I), a storage member (M) and a shift register member (SR) having three output shift registers (SR1, SR2, SR3). The picture signals (S1, S2, S3) originating from the output registers must be combined in a monochrome camera or a color camera with several image sensors to form a balanced composite picture signal (S0). To this end, the camera comprises a control system for fixing one and the same black level in the three picture signals. Via the control system including a common differential amplifier (AM) and multiplex (MUXa, MUXb) and demultiplex circuits (DEMUX), signal reset levels are fixed in the three picture signals (S1, S2, S3) with the aid of peak rectifier circuits (PR1, PR2, PR3) in such a manner that more or less the same signal black level occurs in the picture signals.

Abstract: In a television camera having at least one pickup tube, it is desirable to generate an electron beam with a current intensity which is greater than that necessary for obtaining a picture signal with a nominal amplitude between a black level and a white value. This prevents comet tails from being produced on the display behind brighter, moving scene portions. The electron beam intensity is adjusted by blanking the electron beam periodically during at least one field period and within the field period during at least a portion of a line period of a number of consecutive lines. The electron beam is properly set when the picture signal amplitude is observed to be maximum at a substantially minimum beam current intensity.

Abstract: A signal processing system comprising a signal source (CAM), a signal processing unit (CPU) and connecting cables (CC1-CC5) having different lengths. A series circuit comprising a switchable signal attenuator (ATT), a low-noise, non-controlled signal amplifier (AMP2) and a AGC-signal amplifier (AMP1) is present to compensate for the variable cable losses. A change-over input (ST) of the signal attenuator (ATT) is coupled to a change-over circuit (ATS) which has a locking input (LT) and a measuring signal input (DT). The measuring signal input (TD) is coupled directly to a signal detection circuit (DET). A second output of the signal detection circuit is coupled to the locking input (LT), through a time signal generator (TSG). After a time delay of several dozen seconds, locking is effected, and the signal attenuator (ATT) can no longer switch-over during the normal signal processing operation and impermissible sudden signal amplitude changes are prevented.

Abstract: A television camera comprising a control stage and a setting stage for the beam current control of an electron beam in a pick-up tube. Via a video frequency picture signal amplifier suitable for processing the picture signal generated by the pick-up tube, the picture signal generated by the pick-up tube is superimposed via a coupling capacitor as a control voltage on the setting voltage for the control electrode of the pick-up tube. A stable beam current control without oscillations is the result.

Abstract: A television camera comprising a television pick-up tube and an anti-microphonics circuit provided with a microphonics detection circuit (17) having a voltage-controlled oscillator included in a phase-locked loop circuit. The detection circuit (17) is not only used for switching on or off (15) the microphonics correction (14) but, as the circuit comprises a phase-locked loop resulting in a proper detection it is also possible to generate a test signal (24) by means of which the microphonics correction signal can be given the optimum phase via an automatic phase adjusting circuit (27). The microphonics correction circuit (14) comprises a low-pass filter (47-52) and a phase shifting network (53-60) for an independent adjustment of the amplitude and the phase.

Abstract: A television gamma correction circuit in which a gamma corrector supplies an output signal having a minimum gamma equal to two, from which, relative to a linear input signal which is limited via a signal limiter circuit to the peak-white value, a correction signal is derived, with positive values only intended for increasing the gamma of the output signal of the gamma corrector. In this way scene details produced when the peak-white value is exceeded are prevented from being displayed with a lower picture brightness than associated with the peak-white value.

Abstract: A combined gamma and aperture (or contour) correction circuit for the picture signal in a television camera, the aperture correction signal having signal values, which are negative and positive-going relative to a reference value, being split into a negative and a positive aperture correction signal. The positive correction signal is added to the picture signal before gamma correction and the negative correction signal is added to the picture signal after the gamma correction. The result is an improved aperture and contour correction, respectively, and less noise in the contours in the darker picture portions.