Abstract:
A desk top calculator or other generator of digitized video signals is coupled to the antenna terminals of a conventional television receiver. A circuit within the generator translates the digitized video signals into a modulated TV R-F picture carrier. The circuit includes a radio-frequency source, and a network of diode switchable attenuators. The latter are operated in response to control signals for switching the radio-frequency signal between three discrete levels. Two of the levels are for the display of black and white, respectively, and the third level is a ''''blacker than black'''' synchronization level.
Abstract:
Charge transfer circuits in which a group of serially occurring signals initially are stored in a first charge storage register; then are transferred in parallel to parallel registers to permit, after each transfer, the first register again to be filled with a following group of serially occurring signals; and in which each group of signals are transferred from the parallel registers to an output register to be read out, in series from the output register. Signals may be stored in the parallel registers for an extended period of time to provide a delay or memory function. In addition, charge transfer circuit means may be coupled to charge storage matrix arrays for forming memory arrays and to photo responsive arrays for forming image sensors.
Abstract:
A simplified phonograph record changer mechanism is provided wherein after the last record has been played, a shut-off stud on the cycling gear contacts a shut-off lever. This imparts a movement to the shut-off lever and causes it to coact with other parts of the changer mechanism effective to move the changer motor power switch to its OFF position. The shut-off lever is positioned to interfere with the shut-off stud''s path of travel only after the last record has been played which is determined by the position of the stabilizer arm stab shaft. At all other times, the shut-off lever is positioned so that the shut-off stud will not contact the lever.
Abstract:
An image intensifier camera tube of the type having an image intensifier section for accelerating photoemitted electrons to average energies greater than 1000 electron volts and for focusing the accelerated electrons to one face of a charge storage target which is scanned on its other face by an electron beam. The improvement comprises a buffer layer of chromium on the one face of the target on which the accelerated electrons impinge.
Abstract:
In a process and apparatus for replicating a prerecorded magnetic tape, the particle-binder layer of the prerecorded tape is brought into slippage-free intimate contact with the particlebinder layer of the copy tape. As the tapes are moved in a first direction a laser beam impinges upon the particle-binder layer of the copy tape with a spot size of the same order of magnitude as the particles of the particle-binder layer of the copy tape. The laser beam is deflected to traverse a scanning pattern on the particle-binder layer of the copy tape transverse to the movement of the tape to provide rapid localized heating of the copy tape magnetizable particles to a temperature above its Curie point.
Abstract:
A DETAILED PATTERN ON A PHOTOMASK IS DEFINED, IN REDUCED SIZE, ON A SURFACE OF A BODY BY A NOVEL PHOTOLITHOGRAPHIC PROCESS EMPLOYING TWO SUCCESSIVE FRESNEL DIFFRACTION PRINTINGS. THE SURFACE OF THE BODY IS PROVIDED WITH THREE LAYERS, A LOWER PHOTORESIST, A METAL, AND AN UPPER PHOTORESIST, RESPECTIVELY. THE UPPER PHOTORESIST IS EXPOSED WITH A FRESNEL DIFFRACTION PATTERN OF THE DETAILED PATTERN FOR A TIME TO ACTIVATE IT WITH ONLY THE GREATER INTENSITIES OF LIGHT OF THE FRESNEL DIFFRACTION PATTERN. THE DEVELOPED UPPER PHOTORESIST DEFINES THE DETAILED PATTERN, IN REDUCED SIZE, ON THE LAYER OF METAL. THE LOWER PHOTORESIST IS SIMILARLY EXPOSED ND ACTIVATED THROUGH AN ETCHED MASK OF THE LAYER OF METAL, AS DEFINED BY THE UPPER PHOTORESIST. WHEN DEVELOPED, THE LOWER PHOTORESIST DEFINES THE DETAILED PATTERN, STILL FURTHER REDUCED IN SIZE, ON THE SURFACE OF THE BODY.
Abstract:
Charge coupled shift registers in which the output stage includes an electrically floating diffusion in the substrate, of different conductivity than the substrate, and coupled to minority carrier surface charge storage location. In one form of the circuit, charge signals are shifted down one register and complements of these charge signals down another and these signals are detected by a differential signal detector connected to these diffusions. In another form of the circuit, the signal present in the diffusion of an output stage of one register along with other signals control which of a plurality of source electrodes will be employed to provide input charge signal to a second register.
Abstract:
A circuit which changes state to produce a different output signal level at the peak of a substantially periodically varying analog input signal whereby the peak of the input signal is detected and indicated.
Abstract:
A rotatable assembly includes a plurality of writing devices which are selectably moveable into and out of writing position. As the assembly rotates, the writing devices in the writing position describe concentric patterns on a recording medium. The selective movement of the writing devices may be controlled by an array of sensing elements such as light sensors. These may be located on the assembly and may be selectively energized, as the assembly rotates, in response to a smaller stationary group of energy emitting elements located next to the assembly.
Abstract:
An addition stage of a binary multiple character adder is receptive to input signals, including operand bits from each of the characters and carry-in bits from previous lower order stages. The outputs include the sum for that stage and carry-out signals to succeeding higher order stages. Means are provided for determining the pattern of the input signals and for generating at least one carry-out signal from another carry-out signal in accordance with the input pattern.