Abstract: A FIFO register unit is provided, comprising a first sub-register unit, an input multiplexer and an output multiplexer. The first sub-register unit comprises a first register, a second register and a third register. The first register comprises an input terminal to receive a first input data. The second register receives data from the first register. The third register receives the first input data from the input terminal, data from the first register or data from the second register and determines one of them to output as a first output data.

Abstract: An apparatus for serially making formed parts from a web of deformable material having a plurality of progressive die forming stations for forming multiple parts from the web by advancing the web through each forming station. In one embodiment, the apparatus has a control system for measuring parts formed in the apparatus and adjusting the relationship between first and second die portions of the apparatus to keep the parts formed in the apparatus within predetermined specifications.

Abstract: A gas density sensor having a prism in contact with a fluid whose density is determined. A light source shines light into the prism. The light is reflected off prism surfaces in contact with the fluid. As the fluid density changes, the amount of light reflecting off these surfaces changes depending upon fluid density. A detector placed to receive light reflecting off the surfaces determines density from sensed light.