Abstract: In accordance with the present invention there is provided an eddy current probe for the detection of defects within a structure. The probe has a sensing end with a coil disposed therein. The coil is operative to generate an eddy current field within the structure when placed adjacent to the structure. Furthermore, the probe of the present invention includes a metallic shield disposed around the coil and operative to focus the eddy current field within the structure. In order to generate the eddy current field, the coil is in electrical communication with a frequency generator. The frequency generator is operative to generate a high and low frequency signal within the coil in order to enhance detection of defects within the structure.

Abstract: A synthetic magnetodielectric composite material for absorbing electromagnetic radiation has a sheet of fabric having first and second surfaces. The fabric is formed of an insulating material. Magnetically permeable thread is disposed within the fabric. The magnetically permeable thread comprises a material having a permeability substantially greater than the permeability of free space. The fabric is impregnated with resin. The magnetically permeable thread is configured to provide predetermined permittivity and permeability within a selected frequency range, so as to provide desired absorption/transmission of electromagnetic radiation.

Abstract: A self-contained thermal transfer label is disclosed herein. The product is formed as paper stock having an area of release material applied to a surface portion thereof. A layer of adhesive material is applied upon the release material. A thermal transfer donor ribbon is mated to the label by the area of adhesive material. The donor ribbon is treated, prior to mating with the label, such that the surface tension at the donor ribbon is modified to a level substantially different from that of the release material. As a consequence, when the donor ribbon is removed from the label, after printing on the label, the adhesive remains secured to the donor ribbon, rather than the underlying label. A result is a label that may support a higher quality image, but without adhesive residue after the donor sheet is peeled away. Various applications of the product are disclosed herein.

Abstract: This invention provides a bundle carrier for deep drill stem testing in oil well drilling. The bundle carrier has an eccentric passage for permitting instruments and other apparatus to be passed therethrough during drilling and logging operations. A plurality of slots are formed in the thicker wall portion of the bundle carrier for receiving instrument bundles therein for making measurments of well borehole parameters. A locking device for securing measuring instruments in the slots and parts for communicating fluid to the measuring instrument are provided by this invention.

Abstract: A solar heating system for preheating water which may be used in conjunction with an existing hot water heater. The use of potable water as the heating fluid renders the use of a heat exchanger unit unnecessary. A novel collector unit is disclosed which includes a molded plastic collector frame with integral fluid passageway and a thermally compatible absorber plate bonded to the frame. The use of thermally compatible collector components serves to minimize bondline strains due to uneven thermal expansion of the materials. Reliable and continuous operation of the system is, therefore, possible over a wide range of temperature conditions. Diagonally opposite standoff regions provide even liquid flow across the collector surface regardless of which way the collector is turned. The durable unitized collector design eliminates the need for frame members, additional fluid conduits, specially manufactured collector plates and multiple collector sealing layers.

Abstract: A frictional suspension damping system is provided whereby vehicular oscillations due to an uneven terrain may be controlled by electrically regulated frictional braking device adapted to restrain the rotational movement of a remote torsion bar. Each wheel having an associated torsional member may be so damped. A centralized processor may be used for simultaneous control of a plurality of friction brakes.

Abstract: Movable appendages or stores containers that are positioned controlled in regard to an airplane so as to approximate the cross-sectional area distribution of a minimum drag body of revolution through varied flight regimes of the airplane from take-off to landing and thereby obtain favorable interaction of pressure fields throughout such flight regimes and adjust the store increment on the locus of least drag points in deference to the teaching of the prior art to design the location and shape of such appendages in a compromise position for but one portion of an airplane's flight regime; i.e., normal cruise altitude and speed.

Abstract: A heat transferring device for transferring heat from an upper to a lower location utilizing a mechanical pump and motor to provide fluid transport. The device is entirely encased within a single vertically disposed member requiring no external plumbing and a minimum of fabrication. The resulting device is both compact and cost effective.

Abstract: A method of continuously manufacturing honeycomb sandwiches is provided wherein skin panels of various materials may be more easily and effectively adhered to the honeycomb core. Thermoplastic adhesives which soften at temperatures above the laminate thermosetting temperature are used to provide firm bonding. Bondline voids, therefore, become less frequent and more easily repairable.

Abstract: A method for making a heat pipe panel comprising the steps of forming parallel furrows in a sheet metal plate, covering the sheet metal plate with another plate, bonding the plate together around the edges and between the furrows, to form parallel cavities between the plates, charging the cavities with working fluid and sealing the cavities to form individual heat pipes in the panel. The furrows may be filled with wicking material, and capillary grooves may be cut in the furrows before bonding the plates together. The cover plate also may have furrows formed therein. A header furrow may be provided for the fluid charging operations.

Abstract: A multi-heterojunction of one type of photoconductive layer with another type of photoconductive layer to provide back-to-back modulators using illumination to decrease a potential barrier for current flow and increase voltage drop across an electro-optic device therewith associated in reproduction of an image thereby.

Abstract: The present invention related to optical collimating systems and has particular reference to beam compression of laser diode emission.

Abstract: An antenna system is provided having a common reflector and a plurality of spaced apart end-fired yagi type elements each comprising a driver and one or more directors. The elements are positioned longitudinally parallel to each other in separate planes. Adjustable parasitic reflecting rods are located adjacent to the elements so as to cause the generation of a low energy scattering field which, in turn, increases inter-element isolation.

Abstract: The present invention relates to a target location method, and more particularly to such a system using passive listening devices to determine the range, course and speed of one or more targets simultaneously. The invention may be used effectively against targets which emit either continuous or pulsed electromagnetic energy signals.

Abstract: A dual scavenging separator is provided which simultaneously scavenges out both clean air and particulates, such as dirt or water, from a contaminated flow medium such as air. The invention may be used in conjunction with aircraft environmental control systems to remove engine bleed air contaminants before the air enters occupied compartments or electronic units.

Abstract: An antenna for radio frequency signals including a two flat faced phased arrays and ground plane system therebetween where transmission lines join the antenna planes to electronic control packages such that there is provided proper phase shift, final amplification and timing for retransmission by one of the antenna planes in a preselected direction, and where the signals are space fed to the other antenna plane by a feed system.