Abstract: A system, apparatus and method for providing anti-rotation to an accessory for a network test instrument or the like, includes a threaded insert mounted in the test instrument, an anti-rotation feature receiving opening, and corresponding threaded fastener and anti-rotation mounting stud on the accessory, whereby engagement between the features ensures proper alignment and prevents rotation of the mounted accessory.

Abstract: This invention is a means for preventing loss of flame and compressor section instability in a turbine engine. The invention uses an Electronic Control Unit to modify the fuel system demand signal to the final controlling element or elements of a turbine engine to prevent rapid changes either for increasing or decreasing the amount of fuel to the engine. The invention offers the simplicity and reliability of electronic control over previously used mechanical means such as dashpots, variable orifices, springs, and cams. The use of an electronic delay means further allows for reduction in the weight of the overall engine due to elimination of the mechanical apparatus, the ability to change the delay constants in a simple fashion by changing a preprogrammed value rather than physically changing the mechanical hardware, and the ability to have one or more differing delay rates for increasing or decreasing fuel delivery and operating conditions.

Abstract: In abstract, a preferred embodiment of this invention is a shift system for bicycle type chain drives, including noncable linkages for positive movement in both directions. The hand manipulated controls are conveniently located on the upper portion of the velocipede and are designed for simplicity and smooth operation.