Abstract: A television pick-up arrangement comprising a solid-state picture pick-up device rows of picture pick-up elements of which are connectable to parallel inputs of two output shift registers. When the shift registers are read simultaneously they supply at their series outputs picture signal which are associated with each time two pairs of rows of picture pick-up elements. According to the invention, the two picture signals are applied on the one hand separately to a vertical aperture correction circuit having only one delay device with a time delay of one line period and on the other hand combined to a horizontal aperture correction circuit, the corrected signals being combined behind said correction circuits. Advantageous use can then be made of a device in which pick-up information is obtained by both holes and electrons which are caused by photons.

Abstract: A video signal clamping circuit comprises a summing circuit (R1, R2, R9, 2) an analogue to digital converter (3), a programmable read only memory (6), a latch (7), a digital to analogue converter (9) and an integrator (11). The PROM (6) is addressed by the ADC(3) and produces a 4 bit output code which is dependent on the amplitude of the video signal. This is stored on the latch (7) and passed to the DAC(9) during a timing pulse applied to terminal (8) which occurs during the line blanking period. The DAC(9) produces an output which is stored on the capacitor (C1) in the integrator (11). The integrator (11) output is summed with the input video signal to clamp the video signal level to the reference voltage so that a clamped digital video signal is available from the output (5).

Abstract: A television pick-up arrangement comprising a solid-state picture pick-up device rows of picture pick-up elements of which are connectable to parallel inputs of two output shift registers. At a simultaneous read-out of the shift registers the registers supply at the series outputs picture signals associated with each pair of adjacent rows of picture pick-up elements. In the device the picture pick-up elements in one row are shifted in the row direction to the intermediate position relative to the elements in the other row. A color strip filter is provided having color filter strips transverse of the row direction which have a width equal to half the size in the row direction of a picture pick-up element. After the picture signal obtained from the registers are combined with the same polarity they are applied directly and via delay devices to inputs of a matrix circuit outputs of which are coupled to a change-over circuit from which color signals are obtained.

Abstract: Carrier recovery arrangement in a receiving system for digital data which are transmitted by sixteen-state amplitude and phase modulation (16 QAM), the arrangement having, successively six parallel paths (V.sub.1 -V.sub.6) each including the series arrangement of a multiplying circuit (M.sub.i) and a low-pass filter (F.sub.i); a selection circuit for selecting one of the three pairs of filter output signals thus obtained; a phase control circuit having a Costas signal processing circuit receiving the selected pair of signals and producing a signal representative of the phase error of the received signal, a filter and a voltage-controlled oscillator; and a phase-shifting circuit receiving the output signal of the oscillator in order to couple this output signal to respective second inputs of the multiplying circuits (M.sub.1)-(M.sub.6), this signal coupling being effected with a phase shift zero for (M.sub.1), .theta. for (M.sub.3), 2.theta. for (M.sub.5), and with a phase shift .pi./2 for (M.sub.2), .theta.+.

Abstract: A camera system for color television comprising a color television camera, a control unit and a signal processing circuit. As hue signal the signal processing circuit produces a composite color difference signal p(R-Y)+q(B-Y), wherein p and q are combination factors, R and B are color signals and Y is a luminance signal. In addition to the fact that this hue signal can be employed in known manner for chroma keying signal generation it is employed in accordance with the invention to check the registration on display. Herein, there is a choice between three fixed combinations of the combination factors p and q, the signal processing circuit producing a difference signal R-G, R-B and B-G, respectively. For the standardized luminance signal Y=0.59G+0.30 R+0.11 B it follows that: p=8q, p=-q and 7p=3q, respectively.

Abstract: Facsimile transmission arrangement for documents which are divided into document lines and which contain photographs in addition to text. The text zones of a document line are subjected to a normal run-length coding. The photo zones are subjected to a photo coding. Therein, areas which have a uniform grey tone are first converted into a sequence of binary "0" and "1" elements which succeed each other in a regular alternation. Thereafter a first and a second code word are generated which indicate the number of binary "0" elements and the number of binary "1" elements, respectively of the sequence. These code words are transmitted to the receiver either directly or after having been converted into a Huffman code.

Abstract: The invention provides efficient means for orienting an electronic component on a supporting medium, whereby the axially extending leads of the component are simultaneously positioned in an upstanding manner, for connective purposes, at the time the component is affixed to the supporting medium. This is accomplished by the provision of a pair of linearly-related and spatially separated single slot structures formed on the supporting medium. Extremital end-walls, being angularly related to the bottom plane of the slots, effect the desired outward positioning of the distal portions of the respective leads at the time the proximal portions thereof are suitably affixed in the slots. The invention eliminates the need for separate connective stakings in the supportive medium.

Abstract: Apparatus for detecting the presence of documents in a document pathway employing a light source and a light sensor positioned to function in cooperation with a drum. The drum employs a peripheral surface for support of documents as they are transported across a cylindrical surface which is recessed below the peripheral surface for reflecting light. The positions of the light source and the sensor are selected so that, when no document is present, light from the light source will be reflected from the recessed cylindrical surface onto the sensor enabling the sensor to provide an output indicating no document is present. When a document is present, light from the light source will be reflected from the surface of the document along a path which will substantially miss the sensor and not energize it, thereby enabling associated circuitry to determine that a document is present.

Abstract: A skip count clock generator yielding multiple frequencies of clock pulses for variably driving a scanner to produce a required resolution of scanned data includes a base frequency generator of clock pulses and a device for establishing a periodic clock pulse cycle. An electrical logic circuit is used to skip any chosen whole number of clock pulses in a period to yield a desired fraction of the clock pulse cycle.

Abstract: A modular-head endorser includes a plurality of mateable modules which form an ink jet printer. These modules cooperate to expel drops of printing fluid, direct them to a printing surface, and recirculate excess drops to a fluid supply. Some of the modules are joined together without tools so the user of the invention can quickly and easily clean, replace, and assemble certain modules without additional assistance.

Abstract: System for controlling a document feeder which receives documents of various lengths one-at-a-time with their ends touching or overlapping and delivers them at a constant speed and with fixed spaces between their ends. The document feeder employs a variable speed servo, which drives a group of low-speed rollers and a group of high-speed rollers while maintaining a constant speed ratio between the two groups. A natural gap develops between first and second documents in a track of the feeder between the time the first document and the second document pass from control by the group of low-speed rollers into control by the group of high-speed rollers. Sensors are positioned along the track to detect passage of trailing and leading edges of successive documents.

Abstract: A switched mode regulated DC to DC converter for supplying a regulated voltage to a load includes a switching frequency generator of a switching cycle having positive and negative portions. A device, responsive to the outputs of the switching frequency generator, accumulates a voltage during the positive and negative portions of the switching cycle. The demand for voltage by a load is sensed and circuitry generates a first and second trigger otuput during the respective positive and negative portion of the switching cycle when the accumulated voltage equals the sensed load voltage demand, the time required to generate the second trigger output being equal to the time required to generate the first trigger output. A transformer apparatus, responsive to the first and second generated trigger outputs, generates currents of positive and negative polarity during the positive and negative portions of the switching cycle.

Abstract: A fluid pump system for an ink jet printer apparatus includes a reservoir of printing fluid, a filter for removing contaminants from the printing fluid, and an apparatus for printing characters with the printing fluid. A gear pump delivering steady, stable fluid pressure pumps the virtually contaminant free printing fluid to the printing apparatus. The gear pump also circulates to the reservoir an amount of printing fluid in excess of the amount required by the printing apparatus. A device regulates when the virtually contaminant free printing fluid is supplied to the means for printing and an additional device supplies virtually contaminant and air-free printing fluid to the means for printing.

Abstract: A constant spacing document feeder employs a motor control circuit which drives a feed wheel at an average speed which is dependent upon the length of a document.Since the spacing between successive documents is a function of the length of each following document, by varying the speed of the feed wheel in accordance with the length of each document, the spacing between each document can be maintained substantially constant.

Abstract: Hopper for feeding documents automatically into a sorter. The hopper employs rotating eccentric rollers protruding through slots in the bottom of the hopper to drive documents in a direction perpendicular to the rollers across the hopper against front or first wall. A rotary roller extending through a slot along this wall is used to urge the ends of the documents downward and forward towards feeder nudger belts which feed them to the sorter. A spring biased flag pushes against one end of the stack of documents to urge them in the same direction against the feeder nudger belts.

Abstract: A cam operated document stop in an item sorter provides positive action to halt the passage of a document or other item, from a flow of documents in a mainstream pathway, when it arrives in an inspection station. The document is stopped in an open receptacle area for inspection and then released for return to the mainstream pathway. Stoppage is effected by rotation of cam members which position a stop arm to stop the flow of the document. After the document has been inspected and corrected, the stop arm is repositioned to release the document into the mainstream flow. After a suitable delay to allow the document to clear the receptacle area, the cam members rotate the stop arm into position to stop the next document.

Abstract: An electronic system is disclosed for use in adjusting the spacing between columns of print produced by impact printers and the like. The system adjusts the spacing electronically by use of digital logic which varies the timing between high current pulses which, in turn, drive hammers in the impact printers. With this system, timing of the high current pulses is delayed to increase the spacing and timing is advanced to decrease the spacing.