A fastening system particularly suited for securing parts of a rotor of a slant axis rotary mechanism together including links (110) abutting each of the rotor parts (60, 62), and spanning the interface (ABCD) between the parts. Pivotal nut structures (108) are journalled in the ends of the links and linear passageways (90) are disposed in the rotor parts to be nominally aligned with the nut structures. The passageways are at an acute angle to the rotor axis and terminate in a shoulder (100) at ...

A coupled multilayer microstrip antenna having an upper and a lower microip element tuned to the same frequency, and separated from each other by a dielectric substrate. The pair of elements is located over a suitable ground plane and separated from the ground plane by a second dielectric substrate. The upper element is the driven element which is directly coupled to the feed line while the lower element is parasitically coupled to upper element. The lower element cancels the image field as seen...

A microstrip integrated circuit reflection amplifier utilizing packaged diodes and permitting some gain and bandwidth adjustment. A 3 db quadrature coupler has two of its ports connected to substantially identical reflection amplifiers. The reflection diodes are adjustably mounted in brackets perpendicular to the dielectric substrate of the microstrip network and may be moved in and out along the microstrip circuit to provide for some gain correction and bandwidth adjustment.

An electrically programmable and erasable IGFET nonvolatile memory unit, and method for writing/erasing information in it. The IGFET memory unit has two pairs of floating and control gates, with one pair dispersed over the IGFET channel and the other pair disposed over an adjacent memory control region. Applying a voltage to the IGFET control gate and the memory control region, while maintaining the IGFET source and other control gate at zero potential charges the floating gates. Reducing the me...

A transformer-coupled isolation amplifier which has a minimally sized transformer, high common mode rejection, and a highly linear response over a wide dynamic range. A first chopper periodically alternates by 180.degree. the connection of the input through a high resistance to the primary of a small square loop pulse transformer. The secondary, with the end of the winding closest to the primary grounded, has the inputs of an operational amplifier placed across it. Negative feedback is provided ...

In differential amplifier circuits of the type having first and second transistors, the emitter of each transistor is connected to a different current source and the emitters are coupled by a ceramic filter tuned to 455 KHz. In one embodiment, wherein the transistors have symmetrical resistive loads, an inductor is connected across the filter to tune out capacitance across the terminals of the filter. In another embodiment, the circuit includes an unbalanced and complex load. In yet another embo...

Coupled tubular casings are obtained by placing a coupling piece, preferably a multilayered foil, on the inside of and overlapping two adjacent ends of tubular casings to be coupled and whose adjacent edges make an angle of 10.degree. to 80.degree. with the envisaged axis of the tubular casing, and sealing it.

A transceiver provides bidirectional optically isolated communication between two devices. A first output signal from the first device is input to the transceiver. Using parallel optical data links, an optical signal is generated in response to the first signal and is detected by a pair of light sensitive devices. These light sensitive devices cause a second signal, representative of the first signal, to be generated. The second signal is then conducted to the input terminal of the second device...

This invention relates to formal-coupled polyphenylene oxides. These new polymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

A capacitively coupled inductive shunt current sensor which utilizes capacitive coupling between flanges having an annular inductive channel formed therein. A voltage dividing capacitor is connected between the coupling capacitor and ground to provide immediate capacitive division of the output signal so as to provide a high frequency response of the current pulse to be detected. The present invention can be used in any desired outer conductor such as the outer conductor of a coaxial transmissio...