Abstract: In one aspect, the present disclosure is directed to a gas turbine starting system that includes a shaft coupling a compressor and a turbine. An annular housing extends circumferentially around the shaft such that the annular housing defines a compartment. A flange extends radially outward from the annular housing for mounting the annular housing to a stationary wall. A starter is positioned in the compartment. A collar rotatably couples to the annular housing and selectively couples to the starter. The collar includes a radially inner surface having a plurality of splines for engaging the shaft. The starter, when activated, rotates the collar, which rotates the shaft to start the gas turbine.

Abstract: A circuit for reconstructing an analog signal starting from a digital input signal includes a digital to analog converter and a low pass-filter connected at the output of the converter for receiving the analog format signal and outputting a reconstructed analog signal. The low pass filter is an active filter continuous in time and current-coupled to the output of the digital-analog converter. The digital-analog converter is of the current-steering type functioning at a sampling frequency greater than the Nyquist frequency of the analog signal.

Abstract: A router accessory having a housing with a router attaching portion for adjustable attachment to a router. The router accessory also comprises a plate for fixedly holding a work piece. The work piece support plate has a plurality of arms extending therefrom. There is also a plurality of track mechanisms attached to the housing. The arms are slidably attached to tile track mechanisms so that the plate with attached work piece can be guided in a desired path relative to the router bit. The track mechanisms can be constructed to guide the plate in only the x and y directions or in a preferred embodiment tile track mechanisms can have a varying height in the z direction for actively varying the spacing between the router and the work piece as the plate is slidably guided by the track mechanisms during routing. In this manner, cuts can be made in the work piece which have a contoured depth.

Abstract: A woodworking apparatus includes a conventional table saw having a table and a projecting circular saw blade. A stock moving apparatus is associated with the saw table to move a piece of stock material into engagement with the saw blade. The stock moving apparatus includes a pair of longitudinal support members with a forward and rearward plate extending therebetween. The stock material is removably and selectively rotatably mounted between the forward and rearward plates. A guide is provided on the saw table to guide the stock moving apparatus in a straight line across the saw table. A pattern apparatus is provided to impart a particular shape in the stock material when the stock material is passed over the saw blade. The pattern apparatus includes a pair of spaced apart profile boards upon which the stock moving apparatus is supported during its passage over the saw table.