Abstract: A collector diffused isolation transistor wherein the normal buried layer in the substrate of the device is utilized as a collector region, an isolation region of the same conductivity type as the buried layer being formed by ion implantation of suitable atoms in the buried layer region with a second similar ion implantation in the surface of the epitaxial layer of second conductivity type grown over the substrate and buried layer, the collector diffused isolation region being formed by the up diffusion of the lower ion implanted region into the grown layer and the down diffusion of the upper ion implanted region into the grown layer so that the up and down diffusions overlap. Complimentary devices such as PNP and NPN devices are made on the same substrate utilizing this novel technique.

Abstract: A relatively low frequency wireless electromagnetic communication link is established through a subterranean lossy medium such as ground or water by launching and propagating magnetic waves of generally vertical magnetic polarization through the intervening subterranean region of earth or water between a pair of magnetic dipole antennas. A suitable subterranean dipole magnetic antenna includes an elongated electrical solenoid having a ferromagnetic core, as of ferrite or laminated iron. Relatively low frequency magnetic waves are utilized wherein the frequency is related to the conductivity of the subterranean region and distance between transmitter and receiver such that the range is less than 10 skin depths at the carrier frequency.

Abstract: One or more primary superconductive magnetic field pickup coils are trimmed by means of one or more auxiliary super-conductive trim coils coupled to a magnetic flux sensor for sensing the magnetic flux coupled to the sensor by said primary and auxiliary coil circuits. The trim coils preferably each have their respective magnetic axes oriented orthogonally to each other for independent adjustment. The trim coils are wound in the gradient configuration and an adjustable superconductive magnetic shield is provided surrounding each of the respective trim coils for varying the coupling between the respective trim coil and the magnetic field by varying the position of the magnetic shield relative to a null or symmetric position relative to the trim coil. In a preferred embodiment, there are three mutually orthogonal trim coils.

Abstract: A dual inverter circuit wherein the first inverter circuit includes a pair of phase splitter transistors, one serving to feed the base of the pull-up transistor in the first inverter circuit and the other serving to feed the base of the phase splitter transistor in the second inverter circuit. The circuit provides a minimum delay time between the operation of the first inverter and the turn-on time of the second inverter while also providing active pull-up circuits, i.e., pull-up transistors, in the two inverters to insure fast operate times for both inverters especially desirable when feeding into large capacitance loads.

Abstract: A control circuit comprising several CMOS transistors operating in cooperation with certain dimension relationships among the CMOS transistors to provide a first reference voltage to the gates of two current sourcing transistors and to provide a second reference voltage to the gate of a current sinking transistor, the two reference voltages being related, resulting in a desired tracking between the current sinking transistor and the two current sourcing transistors. The current sink transistor operates to current limit at a value which is approximately twice the current limiting value of either of the two current source transistors such that a substantial improvement in circuit performance is obtained.

Abstract: An operational amplifier includes an input differential stage formed of a differential pair of transistors, a tail current source supplying that differential pair, and a pair of current source loads, each connected to a respective one of the transistors of the differential pair. A common mode feedback loop is provided from a second stage of the differential amplifier to remove any excess current supplied by the tail current source which is not drawn by the current source loads. A single capacitor is employed for assymetric frequency compensation of the second stage, such that the above described common mode feedback can be applied without producing oscillations.

Abstract: Current scaling in a lateral transistor wherein a plurality of emitter-collector circuits are established, certain of said circuits having a different base width than certain other of said circuits. In one embodiment, separate transistors are formed, each with its own emitter and collector, each portion of each collector being spaced an equal distance from its associated emitter the base widths of the different transistors being different, such that, with the emitters coupled in common, different currents being dependent on the base width of the associated transistor. In a second embodiment, a common emitter is employed with the separate collectors formed as arcs about the emitter, the base widths between the emitter and the different collectors being different.

Abstract: A primary superconductive magnetic field component or gradient pickup coil circuit is trimmed by means of one or more auxiliary superconductive trim coil circuits electromagnetically coupled to a magnetic flux sensor for sensing the magnetic flux coupled to the sensor by said primary and auxiliary coil circuits. The trim coils each have their respective magnetic axes oriented orthogonally for independent adjustment of trim. An adjustable magnetic shield is provided surrounding each of the respective trim coils for varying the coupling between the respective trim coil and the magnetic field. In this manner transverse and axial balance or trimming of the primary pickup coil circuit is obtained by adjusting the positions of the respective magnetic shields around each of the respective trim coil circuits. In a preferred embodiment, there are three mutually orthogonal trim coil circuits.

Abstract: An analog switching circuit employs a field effect transistor as a switching element and a regulation circuit for maintaining the bias on the FET constant with changes in the amplitude of an analog signal in the circuit being controlled. The regulation circuit includes a current source, a pair of elements for generating a voltage drop connected in parallel with one another and in series with the current source, and a circuit for maintaining the voltage drops in those circuit elements equal to one another. The circuit elements are connected in series with one another between the source and the gate of the FET, such that the bias on the FET remains constant. A control circuit is operative to disrupt the balance of currents in the circuit elements to cause the FET to become nonconductive.

Abstract: A flag holder for boats and the like water craft includes a bracket having a retaining portion and an offset portion, with the retaining portion being adapted for being mounted on a support of such a craft, such as the windshield frame, and with the offset portion being spaced from that support. A bar having the flag secured to one end thereof is pivotally mounted on one end of the offset portion. A lever having a latching indent is pivotally mounted on the other end of the offset portion. A pin secured to the bar is adapted to be received in the latching indent to hold the bar and flag in a vertical position. The holder can be attached to either side of the craft.

Abstract: A boat stanchion is formed of a single, continuous strand of fiberglass and thermosetting resin. The fiberglass strand is wound into a loop having a multiplicity of turns and the loop is then flattened to form a substantially straight bundle of overlapping strand sections. The strand bundle is placed in a mold with thermosetting resin. One half of the mold includes a pair of pointed rods which separate the strand sections when the two mold halfs are brought together to form two holes. The partial loop of overlapping strand sections at one end of the bundle encompasses one of the holes and approximately one half of the overlapping strand sections at approximately a mid-point of the bundle are positioned on one side of the other hole and the remainder thereof are positioned on the other side of that hole.

Abstract: A sonar system utilizing a common LC tuned circuit for both the transmitter portion and the receiver portion of the electronic system so that both receiver and transmitter are tuned to the same frequency. The transducer is isolated from the LC tuned circuit so that the impedance characteristics of the transducer will not operate to change the main frequency of the tuned circuit. Thus interchangeable transducers may be utilized with the receiver-transmitter circuitry. The transmitter power pulses are generated by a novel Class C pulse circuit providing short time width, high intensity power pulses to the transducer.

Abstract: In a safety razor a relatively permanent portion of the razor blade holder structure has a cutting edge formed thereon disposed to track with the cutting edge of the replaceable razor blade. In this manner the second cutting edge simultaneously tracks behind the first in cutting relation to cut whiskers missed by the first cutting edge.

Abstract: A needleless hypodermic injector ampule includes a main body forming a chamber which is at less than ambient pressure, a cannula extending from one wall of the body, and a rigid discharge portion contiguous with the body and having a bore extending therethrough, which bore is in fluid communication with the chamber and terminates in an orfice which is dimensioned for needleless injection. A method of needleless medicant injection with an ampule having a medicant chamber and a bore extending therefrom dimensioned for needleless injection includes the steps of evacuating the medicant chamber such that it is at less than ambient pressure, sealing the chamber from ambient pressure, thereafter exposing the chamber to a contained medicant to permit transfer of the medicant into the chamber, and then exposing the medicant in the chamber to a higher than ambient pressure to force it through the bore.

Abstract: A data processing system includes an external store for storing macroinstructions, a microprogrammed control section, and a processing section. The control section includes a control unit having an instruction register for receiving the operation codes of selected macroinstructions from the external store, and a control store for storing microinstructions. The processing section includes a register unit for storing data information to be processed and an arithmetic and logic unit connected to the register unit for performing operations on the data information contained therein. A programmed means is employed for generating address information in accordance with the operation codes of selected macroinstructions and supplying such address information to the control store. One or both of either the programmed means or the control store are implemented with programmable logic arrays.

Abstract: A laryngoscope blade includes an upper wall, a lower wall, and a side wall joining the upper and lower walls. The upper wall includes an upper lip engaging portion and an upper gum engaging portion which are contiguous with one another. The lower wall includes a tongue engaging portion and a tip portion disposed for engaging and lifting the epiglottis. The gum portion is substantially parallel to a major extent of the lower wall, whereas the lip portion extends at an acute angle with respect thereto. An inner surface of the upper wall, at the juncture of the gum portion and the lip portion, is provided with a groove and the inner surface of the tip portion is provided with another groove. The bottom surfaces of the grooves are aligned with one another, such that a line of sight extends along such surfaces from each end of the blade.

Abstract: The disclosed full-duplex communication system includes a pair of full-duplex modems, one at each end of a two wire circuit. Each of the modems includes a transmitter for transmitting over the two wire circuit a stream of synchronous data at a first carrier frequency, and a receiver for receiving over the two wire circuit a stream of synchronous data at a second carrier frequency. The receiver includes means for coherently demodulating the stream of synchronous data. In a preferred embodiment, an asynchronous-to-synchronous converter converts asynchronous input data into a stream of synchronous data for transmission by the transmitter. Also, the preferred embodiment transmits the data and receives the data as double side band suppressed carrier quadrature amplitude modulation. The system includes a remote test capability for automatically looping back test data for comparison with the transmitted test data.

Abstract: A novel MISFET and method of manufacture involving a five mask process suitable for making N-channel devices alone, P-channel devices alone or both N and P-channel devices simultaneously. Novel topside contact means, field inversion protection means and gate breakdown protection means are disclosed.

Abstract: In a building construction method a plurality of building segments are coupled together and raised in unison from a central control point via a crane. The crane has a plurality of lifting cables selectively driven from a plurality of winches under the control of the operator. The building segments are pivotably coupled together for lifting into position and for locking together to form a rigid self supporting building structure. Successive layers of the building are hoisted into position via detachable pulleys affixed to the previously raised building segments.

Abstract: A decompression analog computer and indicator includes an ambient pressure sensing chamber exposed to hydrostatic pressure as experienced by the diver. The pressure in sensing chamber produces a flow of fluid between the sensing chamber and a pair of parallel connected second chambers via the intermediary of first and second diffusion membranes introducing a delay to simulate different tissues of the body. Each of the second chambers has a movable wall portion operatively connected to a spring biased pressure responsive indicating piston. The indicating pistons move to and fro in a track overlying at indicating scale visible to the diver. The indicators indicate uptake and release of nitrogen by different tissues within the body and indicate to the diver when decompression is necessary.