Abstract: The collarless shank is provided with a bore for receiving a screw in order to permit securement of the proximal region of shank to the calcar arc of a femur bone. The bore is arranged in the proximal region and extends at least approximately perpendicularly to the medial arc of the shank as well as perpendicularly to the prosthesis neck axis. The screw may be passed through a continuous bore into the calcar arc or may be passed through the calcar arc into threaded engagement in a blind bore of the shank.

Abstract: The bone nail is provided with a tapered portion having a barbed denticulation and a conical head which has a conical shaped depression at the proximal end for receiving a centering cone of the setting and driving instrument. The instrument carries a movable sleeve at the distal end for engaging and holding the bone nail in alignment with the centering cone during implantation. The sleeve is movable relative to the distal end of the instrument so as to disengage from the conical head of the bone nail to permit removal of the instrument and subsequent replenishment of the instrument with a fresh bone nail. The sleeve includes an expandable distal section for engaging the conical head of the bone nail and a proximal expandable section for engaging about a conical surface of the instrument.

Abstract: The medullary cavity barrier is made of a metal in a rosette manner with leaves which are permanently and elastically deformable. The barrier is porous to the extent of being permeable to blood, fat and gases but impermeable to the passage of bone cement. During implantation, each outwardly extending leaf bends relative to a central core to fix the barrier within a tubular bone.

Abstract: A controlled current source apparatus with a voltage/current converter for deriving a signal current fed to a load, includes a first current source delivering a first d-c current super-imposed on the signal current, and a second current source connected parallel to the load for delivering a second d-c current substracted from the d-c current leading into the load.

Abstract: The centrifuge has a self-emptying drum. There are expulsion apertures in the bottom of the drum. The apertures lead from a solids space and can be closed off with a piston slide. A closure chamber that can be charged with closure liquid is associated with the piston slide. The closure chamber communicates with a chamber through a bleed channel in the form of an annular gap and through a valve gap. The annular gap has an extensive cross-section that promotes rapid flow and accordingly especially accelerates bleeding the closure liquid out of the closure chamber into the other chamber. This makes it possible to increase the stroke of the piston slide at a prescribed extraction volume when the drum empties.

Abstract: A two-dimensional semiconductor image sensor has row lines which are selectable over a vertical shift register for driving first selection transistors of the sensor elements. Column lines are connected to a read-out line by way of first switches which are sequentially driven by the outputs of a horizontal shift register. Blooming is reduced. This is achieved by providing second selection transistors for the sensor elements which are connected in series with the first selection transistors and which are sequentially driven by the outputs of the horizontal shift register, and is further achieved by further switches which connect the column lines to a reference potential and which are inversely selectable relative to the first switches.

Abstract: A two-dimensional image sensor integrated on a semiconductor substrate has a plurality of sensor elements disposed in rows and columns. The sensors in each row and column are individually selected in succession via parallel outputs of a first vertical shift register for readout of the sensor elements. Regulation of the integration time during which charge carriers collect in the sensor elements due to incident light is achieved by selecting the sensor elements in each row a further n times via a second vertical shift register after each readout of the charges optically generated therein and within the time span during which the charges collected in the sensor elements of the next n rows are respectively transferred for readout into the column lines. The further n selections eliminate charges formed in the interim in the column lines so that the integration time of all sensor elements is variably shortened by the duration of readout of the n rows.

Abstract: A two-dimensional semiconductor image sensor has row lines which are selectable by way of a vertical shift register to drive first selection transistors of row and column oriented sensor elements. Column lines are connected to a read-out line by way of switches which are sequentially driven by outputs of a horizontal shift register. The goal is to increase the signal-to-noise ratio and is achieved by the provision of second selection transistors for the sensor elements which are connected in series with the first selection transistors, by way of row selection transistors which connect the row lines to the outputs of the vertical shift register, and by way of a difference-forming stage which is connected to the read-out line.

Abstract: A method for the operation of a CID (Charge Injection Device) arrangement is disclosed. Electric analog signals are input into the CID arrangement by use of first and second capacitors connected to row and column lines. A signal voltage creates a signal charge in the first capacitor which is read into the second capacitor.

Abstract: A method for the operation of a CID sensor matrix, in accordance with the parallel injection readout method, having coordinate rows and column lines, and sensing elements at the line intersections, in the operation of which the charges of the sensing elements of a row are transferred to the column lines and subsequently serially transferred, over corresponding column lines, to output means, in which the information charges of a selected row are shifted to the associated column line, the charge values on the column lines, are shifted, in parallel, out of the matrix proper into parallel temporary storage positions, and the charge values are serially readout from said temporary storage positions, with the information charges in the matrix proper being simultaneously erased, and following readout, any stored charge values at said temporary storage positions being erased, and to apparatus for practicing such method.

Abstract: A monolithically integrated two-dimensional image sensor having an array of sensor elements disposed in rows and columns connected by respective row and column lines. A first readout of the sensor elements is undertaken and a charge packet representing the signal is formed by an oppositely doped semiconductor region connected to the respective column lines which charge packet contains charge carriers generated as a result of incident radiation as well as noise signals. A second readout of the sensor elements is undertaken for a short duration so that the charge packet generated as a result of the second readout represents only noise signals.

Abstract: A monolithically integrated circuit for relatively slow readout of a two-dimensional image sensor and transfer of separate signal charge packets and noise charge packets from the image sensor to a pair of charge transfer devices has first and second intermediate memories for respectively storing the signal and noise charge packets which are connected to clock pulse voltages for successively transferring the packets to the charge transfer devices. An output stage connected to the charge transfer devices contains a difference circuit for subtracting the noise signal from the total signal to generate a readout representing only the signal generated by incident radiation on the sensor.

Abstract: The invention relates to an optoelectronic sensor with at least one sensor element according to the principle of carrier injection (CID), whereby the surface of a doped semiconductor body is faced by two closely adjoining electrodes insulated from one another and from the semiconductor surface by a thin insulation layer that are controllable via separate control circuits. The semiconductor body contains a more strongly doped area having the type of the semiconductor doping on its surface below one of the electrodes, which area extends slightly into the semiconductor surface lying below the other electrode. Thereby, a narrow potential barrier is formed between the two electrodes, for example, between a line electrode and a column electrode. When an optically generated charge under one electrode is displaced under the other electrode, then this narrow potential barrier prevents a flow back of the charge under the discharged electrode.

Abstract: An opto-electronic sensor has at least one light-permeable electrically insulating layer carried on a surface of a substrate of doped semiconductor material. The insulating layer carries a number of electrodes arranged in the form of a matrix of lines and columns in which at least one line is present with at least two electrodes. The electrodes belonging to a line are electrically interconnected with each other. A buried channel is present in the substrate below each column and is doped opposite to the doping of the substrate. Each buried channel is connected, by way of a respective on-off switch, to the input of a voltage amplifier whose input capacitance is smaller than the capacitance of each individual buried channel and whose input resistance is so great that the time constant determined by the input resistance and the capacitance of a buried channel is greater than 10 nsec.

Abstract: A process is disclosed for reading out an image sensor matrix having sensor elements arranged in rows and columns and which produces television signals representative of an image. Read-out of the matrix for the production of the image consists of two sub-processes which follow one another in time. In the first sub-process, the items of information of the sensor elements provided in each individual row are read out one after another. The rows are read out consecutively. In the second sub-process, summed items of information are read out from groups of rows. Each row group may consist of two or more rows. As the read-out of a given group proceeds, corresponding items of information in each of the rows are summed together during the read-out so as to form the sums of corresponding items of information. The groups include all of the rows of the matrix and the groups are read out consecutively.

Abstract: The axial mechanical seal of the present invention comprises a housing with an enclosed annular space containing fluid under pressure; a seal ring and a carrier supporting the seal ring are axially and radially displaceable in the annular space when subjected to heavy vibrations; a series of pockets are annularly disposed in the housing and each includes a compensating element having a portion in contact with the fluid under pressure that yields to accept the fluid displacement resulting from the axial movement of the seal ring and its carrier inside the annular space.