Abstract: The water board cover apparatus removably covers an existing water board so that the board can be towed behind a watercraft without the typical problem of the board's destruction. The apparatus has a top and a bottom, a front and a rear. The forward cover covers the nose of the water board. The tow loop is affixed to the front cover bottom. The bottom retainer covers the tail of the water board. The selectively connected strap assembly joins the forward cover to the bottom retainer. The bottom cover covers a part of the bottom of the water board. The bottom cover is connected to the forward cover bottom and the bottom retainer bottom.

Abstract: A thermal drop-on-demand ink jet print head in which conductor electrodes are formed on opposed surfaces of a print head substrate and extend to the edge of the substrate. An array of heater elements is formed on the edge of the substrate in electrical contact with the conductor electrodes. A nozzle plate is mounted with a nozzle aligned with each heater element, and a manifold is positioned to provide ink to the space between the nozzle plate and the edge of the substrate so that a drop of ink can be ejected from the nozzle each time the associated heater element is energized with a data pulse applied to a selected one of the conductor electrodes.

Abstract: A thermal drop-on-demand ink jet print head in which an array of heating means is provided on one surface of a substrate member. A common electrode provides electrical contact to the heating means, and an array of data electrodes provides electrical contact to individual ones of the heating means. An array of feed through conductors is provided which pass through to the opposite surface of the substrate member to provide electrical contact between one of the data electrodes and one of an array of conductors leading to spaced solder pads on the opposite surface of the substrate member. A nozzle plate is mounted adjacent to the substrate member with a nozzle adjacent to each of the heating means so that, upon connection of an electrical signal to one of the solder pads, the corresponding heating means is energized and a drop of ink is ejected from the adjacent nozzle.

Abstract: Electrochromic display devices having very desirable stability and reversibility are obtained using as the oxidant certain fluorene compounds substituted with at least two alkoxy groups per molecule. The display device comprises a reactive medium between two electrically conductive electrodes at least one of which is transparent. The reactive medium comprises an anhydrous solvent and an oxidant/reductant pair.