Other

The Ohio State University

David T Rabb

Robert Wayne Dickinson

Ben W Dickinson

Betty Lise Anderson

Thomas J Noble

Disclosed herein are various improvements in optical switching engines. In one aspect, a range of switching engines includes various multiple bounce, multiple image devices, such as, for example, the Herriott Cell and the Robert Cell. In another aspect, liquid crystal spatial light modulators (SLMs) are used in the switching engine of an optical cross-connect. In another aspect, polarization gratings (PGs) are used in the switching engine. In another aspect, a switching engine includes a Fourier cell using SLMs with more than two states. Alternative imaging optics in a Fourier cell implementing a multiple-bounce, multiple image device are also disclosed.

Devices and methods for implementing an optical switching engine

The embodiments may relate to games or sports using tangible projectiles. A tethered ball game embodiment may include a play ball and a tether that may be connected to the play ball and a sensor head assembly. The tether may be elastic. The sensor head assembly may have a force sensor to determine an impact power imparted to the play ball, a spin sensor to determine a rotational value of the play ball, a travel path sensor to determine a path of travel of the play ball, and a play ball strike sensor to determine a strike to the play ball. The tethered ball game also includes a target device and a player feedback system having lights and audio feedback, all controlled by a controls system.

Tethered ball game having targets and indicators

A system for the formation of a bore hole, particularly for use in enhancing the recovery of oil from an oil bearing underground formation using an assembly including a driving fluid chamber, sealed from a driving fluid chamber, and a drill string terminating in a hydraulic drillhead which passes drilling fluid into the formation. Pressurized fluid from the drilling fluid chamber is applied against the drillhead to pull the drill string into the formation, while pressurized fluid from the drilling fluid chamber pushes the drill string forward from the rear. In a preferred embodiment, the forward end of the guide tube includes a whipstock through which the piston body turns from a vertical to a horizontal direction into the formation to provide a radial for the injection of steam.

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Alameda County, CA, United States of America

David T Rabb