Abstract: A seismic cable assembly has approximately 500 equally spaced elemental sensor units to receive seismic signals generated in the earth by a seismic impulse generator or "shot". The sensor units each include 3 hydrophones or geophones spaced about 6 feet apart, for a sensor unit length of about 12 feet, to receive seismic signals up to several hundred hertz. Signals representing seismic waves received at each of these 500 units are transmitted from the cable, to a central control and recording unit, mounted in a vehicle such as a towing ship. Connected to the cable will be one or more array-forming systems for processing seismic data from the sensor to synthesize various direction-sensitive hydrophone arrays located along the seismic cable.

Abstract: A measuring sensor head for determining the contents of gases in liquids, particularly for transcutaneous determination of oxygen in blood, as well as a method of manufacturing such sensor head are disclosed. In accordance with the invention, the gas-permeable membrane which covers the front face of the sensor head and which, during use, is applied to the human skin, is preshaped to assume a cap-shaped configuration. This eliminates previously occurring measuring errors due to uncontrollable stresses causing thickness variations generated in conventional membranes and, moreover, provides for an improved sealing effect between the housing of the measuring head and the membrane.

Abstract: A spring lancet holder for creating accurate standardized, reproducible puncture wounds in the skin for medical diagnostic purposes is disclosed in which accuracy and reproducibility is improved by minimizing the recoil transmitted to the lancet holder by actuation of the drive mechanism which pushes the lancet into the skin. In a preferred embodiment, a mass is shown which is caused to move in opposition to the motion of the lancet caused by a striker spring which is mounted between the lancet and the mass.

Abstract: A device is disclosed for applying a gas permeable membrane to an electrode. A collar is used to hold the membrane on the electrode. The device includes a guide bushing for forcing the collar over the membrane onto the electrode and includes a soft surface for maintaining a constant pressure against the membrane surface during the application.

Abstract: In the method of manufacturing an electronic vacuum device of the type containing at least one component element comprising a matrix of solid or hollow glass fibers bonded together in a fused matrix, in which device at least one end of said matrix is located within or forms a boundary to a region in-vacuum, including the step of applying microwave energy radiation to said glass matrix for removing water vapor and other gas molecules from said matrix.

Abstract: In a DC to DC converter, an improvement for reducing the peak current level through the electronic charging switches including an inductance in series between the junction of the clamping diodes and the junction between the primary side of the transformer and the primary capacitor.

Abstract: A digital angle to resolver/synchro converter is disclosed which utilizes the tangent of the input angle in a unique feedback loop.

Abstract: Inverter-rectifier combinations of the type which include at least a pair of transistors for alternately applying DC current to a transformer to generate alternating voltage from a DC source, and a digital semiconductor type driving means for alternately providing voltage pulses of given duration and at a periodic repetition rate at each of two outputs for controlling such alternating operation of the transistors is improved in a combination containing a protective circuit located in between the driving circuit and the inputs to the inverter transistors.

Abstract: A novel structure in a coaxial to waveguide transmission line transition includes a waveguide section having longitudinally extending ridges on two opposed walls; a metal impedance transition member extending from one wall of the waveguide having a geometry within the waveguide of three right cylinders of dissimilar size stacked upon one another to form a steplike arrangement and a central passage therethrough; a dielectric cylindrical member extends into said waveguide from an opening in a waveguide wall opposed to that of the transition member and is in abutting relationship with the end of said impedance transition member; an elongate rodlike conductor extends axially through said dielectric member and said impedance transition; further each of the longitudinally extending waveguide ridges includes an outwardly flared portion of increasing width, one of which abuts the periphery of the lower step of said transition member and the other of which is spaced a predetermined distance from said dielectric member

Abstract: This invention relates to synchronizing switching systems for modulation of light spectrum frequencies, and a cathode-ray tube apparatus for exposing and simultaneously at electronic speed synchronizing such frequencies onto celluloid light sensitive photographic film. A method for so synchronizing modulating light spectrum frequencies, and for exposing such frequencies on such light sensitive film using a cathode-ray tube light source is related.

Abstract: A light emitting diode (LED) array having a plurality of electrical conductive paths for each LED in the array.

Abstract: A projectile control system for projectile guidance and control for use against moving targets, which allows the projectile to fly a minimum energy path to target intercept, applies corrective commands to the projectile as it approaches the target to correct the projectile in flight for errors in system "boresighting" and similar errors, and also to correct the ground control system on the basis of the same measurements so that these calibration errors will have a reduced degradation on the accuracy of subsequent projectiles, and uses the miss sensing process to improve prediction accuracy when unguided projectiles are fired from the same launcher so that the system has both a controlled projectile and an unguided projectile capablity, and both capabilities benefit from the miss sensing and data processing process.

Abstract: A programmable character display module for the lighted display of changeable indicia, where the display can have particular use in a switch assembly.

Abstract: A table is shown suitable for use in supporting, manipulating and positioning human bodies or cadavers during examination, diagnosis and experimentation involving the spine. A pelvic support and a thoracic support are separately slidably mounted on a frame base table. Each support is provided with positioning rods which may be placed in predrilled holes in the pelvic and thoracic regions respectively. The positioning rods are pivoted for rotation so that the cadaver's spine may be controllably and adjustably positioned to simulate forward bending motion of the spine. The thoracic support is pivoted along two axes to provide lateral bending and rotation adjustments. Sensitive plates are positioned below and to the side of the cadaver for sequential radiographic analysis of the spinal region between the positioning rods during various postures controlled by adjustment of the rods and supports. Suitable indexing and locking mechanisms are provided so that a series of sequential positions may be examined.

Abstract: The perfusion rate in animal tissue is measured percutaneously at a specific locus, and at the same time the indicator concentration is percutaneously measured at the same locus so that the perfusion efficiency factor can be determined. Apparatus for carrying out the above method is also disclosed comprising, in combination, a first and a second wall means defining a first and a second surface, each placed in contact with animal tissue to be measured and respectively cooperating with first and second sensor means so that the temperatures of said surfaces can be compared and simultaneously processed with the measurement of the indicator concentration performed by a separate measuring means also in contact with the tissue, so that the perfusion efficiency factor can be determined.