Abstract: A sun visor extension includes a base and an extension member connected to move relative to the base. Once the base is attached to a surface of an existing vehicle sun visor, a user selectively slides the extension member between a stowed position either in front of or behind the sun visor and a deployed position extending laterally from the sun visor. One embodiment of the base includes a channel for receiving an edge of the extension member, and the extension member includes opposing ends having stop members to prevent the extension member from being separated from the base. The position of the base relative to the sun visor is adjustable to allow the position of the fully deployed extension member to be adjusted.

Abstract: A method and apparatus for back-annotating timing constraints onto a logical simulation model of a field programmable gate array circuit includes a process and system for creating equations relating to the sequence of nodes between an input and output or clock input in the logical circuit and equating this to the external timing characteristics of the FPGA circuit. This linear system of equations can then be solved to obtain the individual timing constraints for each node of the circuit within the simulation model.

Abstract: A valve spring compressor apparatus for removing and installing valve springs on automotive racing engines includes a valve seat and a compressor pump assembly. The valve seat is placed between the valve spring and the engine housing. The compressor engages the valve spring seat with a support arm and extends a piston toward the valve spring seat, thus compressing the valve spring and allowing for the removal of the retainer ring and keeper lock. The compressor uses a source of compressed air to drive a power piston into a compression chamber multiplying the supply air pressure several times. This multiplied air pressure is retained in the extension piston chamber by a one-way valve. As the extension piston extends, the multiplied air pressure in the extension piston is maintained by repeated cycling of the compressor.

Abstract: An automatic robotic lawn sprinkler providing a water powered articulated, actuation and control system aiming a continuous stream of water to all coordinates within a polar coordinate system comprising a manually programmable base assembly for anchoring to the ground and containing size specific range data, an azimuth rotor assembly rotatably mounted to the base in a horizontal plane, a range rotor assembly rotatably mounted in a vertical plane substantially perpendicular to the azimuth rotor an azimuth actuation and control system range actuation and control system, and a mechanism for variably controlling range rate and flow volume.

Abstract: A device suitable for holding a collapsible tube and dispensing the contents thereof is provided. The device has a base which supports and holds the tube, an upper plate pivotally attached to the base and adapted to pivot or rotate one or more times towards said base to compress the collapsible tube and dispense the contents thereof. The device also includes a forward wall having a vertically disposed slot which receives the neck of the collapsible tube and allows the tube to slide vertically as the tube is compressed and the contents are dispensed. Repeated rotations of the upper plate results in a milking of the contents of the tube and thus a controlled dispensing of the contents.

Abstract: A stereophonic loudspeaker system which includes at least two channel loudspeakers and a centrally located feedback control loudspeaker. Each channel loudspeaker incorporates an electrically driven low frequency electrosonic transducer and a sonically driven electrosonic transducer sonically coupled together to form a sonic oscillator. The sonically driven transducer responds to sound and sonic vibrations produced by the electrically driven transducer to produce sounds and an electrical output signal. The feedback control amplifier includes a plurality of electrosonic transducers interconnected sonically and electrically. The transducers of the feedback control loudspeaker respond to the electrical signals from the sonically driven transducers of the channel loudspeakers to interactively enhance the production of aurally pleasing low frequency sound from the loudspeaker system.

Abstract: A tool adapted for inserting and removing pitot tubes or other sensing elements through a hot tap into a fluid conveying pipeline is mounted to the side of the hot tap. A drive tube is slidably inserted into a protective enclosing tube, with the enclosing tube being attached to the hot tap and the drive tube being attached to the sensing element. Rotation of a threaded drive shaft causes a threaded bushing connected to the drive tube to move upward and downward within the enclosing tube depending on the direction of rotation. Downward movement of the drive tube inserts the sensing element into the pipeline through the hot tap and upward movement of the drive tube removes the sensing element from the hot tap.

Abstract: An improved apparatus is disclosed and preferably includes a bifurcated truck assembly that is interlockingly and removably attached to a sole plate, as well as a quick-change wheel and axle apparatus. At least in a two-wheeled version of the roller skate apparatus, the wheels preferably include a generally flat horizontal central portion on the ground-engaging wheel periphery in order to provide greater ease and stability in two-wheeled skating.

Abstract: A pipeline pig has hollow flared ends and a central portion of smaller radial dimension than adjacent parts of the pig. Detachable appendages extend radially outward from the pig in circumferential rows. At least one row of appendages is in the central portion and the appendages extend radially outward less than the other rows of appendages. The appendages are threaded into sleeves having anchored bases. The row of appendages that extends radially outward by a smaller amount than the other appendages is subjected to reduced wear, but when the pig encounters resistance, the central part of the pig extends outward bringing the appendages into contact with the interior of the pipeline.