Abstract: A hologram, produced by illuminating an object via a coherent light source and associated optics, or by digital components or photographic components, is imaged onto, for example, a television camera to selectively provide either a real time, or a non-real time, system. When written directly onto the camera, the hologram is used in a real time system, whereas the digital or film input to the camera provides the combination for a non-real time system. The image is converted into a corresponding electrical video signal via the camera, and the signal is supplied to a selected spatial light modulator. Subsequent illumination by a read coherent light source reconstructs the hologram into a three-dimensional image of the original subject matter, which then may be viewed via a selected optics system.

Abstract: This invention is a mount to fit a portable camera for studio use. The mount has a vertical front plate to the rear side of which the front of the complete camera (less lens) is attached, without the need for any disassembly. From the front of the plate the studio lenses extend. A horizontal bottom plate extends from the lower rear portion of the front plate for attaching the mount to a standard tripod, or other base. A protective grille-cage assembly extends from the front and bottom plates to generally enclose the space to be occupied by the camera. Equipment particular to studio use is contained in a pair of side pods that are hinged to the grille members so as to be swung outwardly and downwardly for access to the camera. A studio view-finder and monitor is attached to various rearward grille members and is vertically adjustable by means of vertical racks formed on the grille members and manually conjointly operable through pinions contained in the view-finder and monitor assembly.

Abstract: A manually-operable joystick is mounted for universal pivoting motion as by means of spherical bearing and journal means and is biased toward a neutral position so as to return automatically thereto upon release of manual constraint.

Abstract: In this controlled decay envelope detector, a capacitor is used to hold the momentary peaks of the input signal. Its only discharge current path is controlled by a circuit which simultaneously monitors the capacitor voltage and the input signal such that the discharge current from the capacitor is proportional to the voltage difference between the capacitor voltage and a conventional exponential RC decay voltage provided in the control circuit. The resulting discharge from the capacitor, in response to a negative-going step input voltage, is an increasing current starting from zero at the time of the transient. The resulting detector output describes an upwardly convexing voltage decay curve which holds its level essentially equal to that of the initial peak input voltage until the next estimated peak input occurs. Only when the next peak input does not come, or is lower than the last one, will the output start dropping at an increasing rate, which provides a correspondingly precise detection of the envelope.

Abstract: The phase of an output subcarrier signal may be varied over a range of 360.degree. with respect to the phase of an input subcarrier signal. A ramp generator which generates a ramp at one-half the subcarrier frequency, is coupled to a very fast differential comparator means whose output causes a subsequent tuned circuit to ring at the subcarrier frequency. Continuous oscillations, recycled every second subcarrier cycle, are generated as determined by the threshold set on the differential comparator means. A crystal filter reproduces the output subcarrier as a clean sinewave. Remotely controlled phase adjustment of from zero to 360.degree. is provided by varying the threshold of the differential comparator.

Abstract: A method and apparatus for measuring vertical surface variations of a specimen is disclosed wherein the specimen is mounted in movable relation to an objective lens assembly, a reticule being arranged at a focal plane of the objective lens assembly, movement between the objective assembly and the specimen necessary for maintaining the reticule in focus upon different surface portions of the specimen providing an indication of vertical spacing between the surface portions. Another embodiment of the invention contemplates a three-dimensional reticule arranged at or adjacent a focal plane of an objective lens assembly for simultaneously focusing portions of the reticule upon different surface portions of the specimen, the reticule being adapted to provide an indication that the vertical spacing between the different surface portions of the specimen is within acceptable limits.

Abstract: An improved joint transform correlator system frequency multiplexes two input signals to reduce the resolution along a single optical axis by one half, and uses full input transducer resolution in the other axis to provide a 20% increase in overall system performance. The two input channels are combined by summing baseband channel 1 information with reference channel 2 information which is frequency shifted using single sideband modulation techniques. The resultant signal is used to drive an input transducer of an optical system. The input transducer spatially modulates the light from a laser. A frequency plane is produced by the input optics, where the spatially separated channels may be observed. An interferometer is used to further process the signal information by combining the two channels at the joint transform plane. The combined signals are then written onto an optical-to-optical transducer where the joint transforms are multiplied together through a detection process.

Abstract: A device for floatably supporting a portion of a heat exchanger core to a shell for accommodating thermal expansion.

Abstract: Apparatus is disclosed for acquiring and maintaining a generally continuous clock signal from a very high frequency encoded data stream of the type which is self-clocking and has logic state transitions occurring at two locations within each bit cell of the data stream. The apparatus is particularly useful in decoding apparatus, such as may be used in a magnetic recording and reproducing system. The apparatus effectively generates the clock signal from the encoded data stream and reclocks the data stream utilizing the generated clock signal to accurately position the logic signal transitions within the bit cells and thereby assure accurate decoding of the data. The apparatus processes two simultaneously transmitted synchronous data streams, and has the capability that permits the generated clock signal from one data stream processed in one channel to be used to maintain synchronization of the other processing channel notwithstanding a loss therefrom of the data stream for short periods of time.

Abstract: A servo system provides phase locked servo control of the rotational speed and phase of one, two, or more, disk packs by operating the disk pack, or packs, approximately 2% faster than desired, and then applying a control current to an existing eddy current brake in the disk pack via a servo circuit to reduce the speed to that desired. The servo circuit regulates the servo control current to the brake via two loops; a phase loop which establishes a pack position relative to an external reference pulse, and a velocity loop which provides compensation to enhance lock-up time and improve overall stability. The summed outputs of both loops provide a composite error signal corresponding to the servo control current.

Abstract: Working fluid from a source thereof and which is to be conditioned in heat exchangers and fluid conditioning means is admitted lastly to the passageways of a heat exchanger and to a bypass around the passageways to provide to the point of use a fluid from the passageways in a final condition tempered by the bypassed fluid.

Abstract: Time base errors in PAL subcarrier reference bursts, created in part by the operation of a video tape recorder, are detected by the recorder and used for detecting the phase shift error in PAL phase angle switching between bursts on adjacent video signal lines which existed before the video signal was recorded. The video tape recorder timing errors detected on the PAL bursts are first detected after the 90.degree. phase angle between successive PAL bursts has been eliminated. Two sample and hold units then are alternately strobed, each at a point in time during a given tape recorder head pass wherein the error signals are normally most accurate, such that a first burst timing error is retained in one such unit and a next burst timing error is retained in said second unit. The outputs of these two sample and hold units are filtered and combined in an integrator for generating a voltage control signal whose amplitude varies as a function of the pre-existing burst shift error.

Abstract: A first digital data memory is responsive to a first clock signal varying at a rate in accordance with the timing errors contained in a stream of digital data to enter the digital data for temporary storage. The stored digital data is retrieved from storage in the first digital data memory in response to a second clock signal of a stable reference rate. The relative times of entering and retrieving the digital data in the first digital memory are set according to the occurrence of a selected sequence of digital data bits contained in the digital data. The digital data retrieved from the first digital data memory is further temporarily stored in a second digital data memory for an interval determined by the time difference between the occurrence of the selected sequence of digital data bits and the occurrence of a reference time signal.

Abstract: A disk mastering preview system utilizes an original audio signal from an audio source for previewing signals to be recorded by a disk lathe. Delayed audio signals corresponding to the original audio signals are produced for recording by the disk lathe a predetermined time delay thereafter. The original audio signals are sampled periodically by a sample and hold circuit to produce analog sample signals indicative of the signals sampled. An analog to digital converter converts the analog sample signals to corresponding digital sample signals. Successive digital sample signals are written into successively addressed memory locations and read out an adjustable predetermined number of memory addresses subsequently. A digital to analog converter converts the digital sample signals read out of memory into analog signals for recording. The predetermined number of addresses is set in a time delay register which produces a signal indicative of the number.

Abstract: The transducer has a pole tip plate containing magnetic pole tips defining transducing gaps and a core housing providing electric shielding and containing magnetic cores engaging the poles. The tip plate has a first part of a wear-resistant, nonmagnetic, machinable material in the transducer-to-medium interface area, providing long wear, and an integrally joined contiguous second part of a conductive, nonmagnetic, machinable material, providing electric shielding.In accordance with the method, corresponding surfaces of a first block portion made of nonmagnetic, wear-resistant, machinable material and of a second block portion made of a nonmagnetic, conductive, machinable material are integrally joined together. Pole tips are secured into parallel grooves machined transversely to the joined surfaces to form a half-tip plate.

Abstract: A large free-falling mass with a hollow vertical hole therethrough is intercepted by a smaller sub-critical high velocity downward traveling mass and with a smaller sub-critical high velocity upward traveling mass. A resulting explosion is contained within a large chamber which contains much molten sodium spray which attenuates the effects of the explosion and absorbs the explosion's energy and debris. The heated molten sodium with debris provides useful thermal energy to a heat exchanger means and materials for new masses and for new assemblies that are manufactured from precipitate therefrom. The reactor system is a net consumer of plutonium and converts spent enriched uranium LWR fuels into enriched (mostly of U.sup.233) uranium by the neutron irradiation of thorium.

Abstract: An improved method and apparatus for producing dry excited singlet delta oxygen for use in iodine lasers.

Abstract: A vertical-rate sawtooth waveform amplitude modulates a train of horizontal-rate pulses. Positive and negative pulse clippers receive the pulse train. One generates a clipped waveform during the last half and a zero output for the first half, of a television field. The other generates a clipped waveform during the first half and a zero output the last half of the field. A pair of AC coupled integrators, driven by respective clipped waveforms, generate horizontal-rate sawtooths which are linearly modulated, one from a maximum at the beginning of the field to zero at the center thereof, and one from zero at the center to a maximum at the end of the field. Two pairs of clippers separate the two sawtooths into four half-sawtooths, wherein each is active in a time interval corresponding to respective quadrants of the picture raster. Potentiometers are used to vary the respective waveforms to allow independent correction of the scan in any corner.

Abstract: In the apparatus of the present invention, air flow control inserts are disposed within the formed tube air outlet manifolds of a heat exchanger of the counterflow type wherein the manifolds have openings communicating with air passages of the heat exchanger core. Each insert is generally tubular in shape, having an intermediate cylindrical tube portion, and larger diameter end portions, which are substantially equal to the diameter of an outlet manifold. Each intermediate insert portion is initially provided with a plurality of peripheral, longitudinally equally spaced slots, equal in number to the number of openings in a manifold, and of such circumferential lengths as to subtend angles substantially equal to the angles subtended by the manifold openings. Tube material adjacent the slots is then urged inwardly of the tube to form apertures and adjacent louvers.

Abstract: An air cycle refrigeration system in which cabin exhaust air is utilized to regeneratively cool the pressurized working fluid before expansion thereof through a cooling turbine and introduction in the cabin.