Abstract: A tumbling teaching and practice device includes a pair of side supports and a floor support. The floor support is hingedly affixed to be collapsible and thereby permit the device to be compacted for storage when not in use. The floor support includes a pair of hingedly affixed floor boards which are rotated against the sides when the device is collapsed and fit juxtaposed to one another when the device is expanded for use. In addition, a floor mat fits on top of the floor boards. The two side frames support a channel having a round member therein. A roller assembly is affixed to the round member to be able to easily travel laterally along the length of the device. Straps may bone attached from each roller assembly and are adapted to be affixed to a belt worn by the student using the device.

Abstract: Side protectors for a water craft include a base which may be affixed to the hull of the craft and into which fits an inflatable bladder. The protectors are modularized and a plurality of the protectors may be affixed to the craft along either horizontal rows or individual protectors may be vertically orientated, depending on the anticipated need for protection. A snap lock type connection, including mating extensions and recesses in a chamber closed at one end, is provided for affixing the bladder edges to the base holder. A space is left between the legs of bladder connector so that when high pressure air is added to cause inflation of the bladder, the same air also creates additional pressure maintaining the bladder coupled to the base. An air compressor and operators panel are provided which permits any of the various bladders to be inflated depending on the particular need at the particular time.

Abstract: A particle counter, of the type utilizing a Coulter(R) type aperature and a suction flow path downstream from the aperture, has a pair of electrodes on both sides of the aperture. A current is provided from the downstream electrode to the upstream electrode and pulses in the resulting voltage across the aperture are monitored to detect the passage of blood cells through the aperture. A grounded electrode is placed in the downstream flow path at a position near the package panel to isolate the cell counter from external electrical noise signals. An isolated high input inpedance amplifier is coupled to provide the monitored voltage to an inserted electrode positioned between the downstream aperture electrode and the grounded panel electrode. Because the inserted electrode and downstream electrode are then at the same voltage, no current flows through that portion of the flow path.

Abstract: An x-ray lithography system is disclosed in which x-rays are generated by directing a high energy laser beam against a metal target to form an x-ray emitting plasma. The x-rays from the plasma are then directed through a mask towards a resist covered wafer to cause a patterned exposure on the wafer resist coating. The mask, the portion of the target which the laser beam strikes and the portion of the water to be exposed are all within an evacuated chamber. The laser, prior to entering the chamber, is split into two separate beams, each of which are focused and directed through a window in the side of the chamber towards the same spot on the target. Apparatus, including an air bearing, seal and positioner, is provided to move the target at periodic intervals. Similar apparatus is provided to move the wafer from exposure section to exposure section.

Abstract: A device for assisting addiction treatment comprising an earphone adapted to be placed in the external auditory canal of a user's auricle, the earphone having an electrode adapted to contact the surface of the auricle, and a buzzer operable to make sounds of ultra-low frequency, a clip adapted to be attached to the rim of the auricle, the clip having an electrode adapted to contact the rim, a sound generating circuit adapted to deliver low voltage signals of low-frequency to operate the buzzer, and an acupuncture point stimulating circuit adapted to deliver a high voltage stimulus of low current to the electrodes.

Abstract: A slip knot wrist strap attachment for an item of equipment, such as a sport racquet, is fabricated from a single piece of tubular braid. One end of the braid is inserted through the core of the tubular braid from an insertion point thereof and fed through the inside of the tube to the other end of the tube to form an inner tube, an outer tube and a holding loop. The ends of the inner tube and outer tube are inserted through the formed holding loop and the outer tube is slid over the inner tube to close the holding loop, thereby forming a sliding loop from the insertion point. The sliding loop may fit around the wrist of the equipment user and the remote end may be tied to the item of equipment during use of the equipment.

Abstract: A portable business card slit cutter includes a base member and cutting member which is rotatably affixed to the base member. A pair of triangular shaped cutting blades are affixed to the cutting member and a corresponding pair of receiving slits are positioned on the base member so that the blades are inserted into the slits when the cutting member is rotated toward the base. When a sheet of paper is positioned on the base member, the blades cut slits in the paper. The blades are spaced apart by an amount so that, when the slits are cut, opposite corners of conventional business card may be inserted into and held by the slits. The slit cutter includes a paper stop for positioning the paper as well as a paper width positioner. The cutting member is affixed to the base by a hinge mechanism and held spaced apart therefrom by springs. The cutting blades are held by Tee shaped carriers which are inserted into Tee shaped carrier slots in the cutting member.

Abstract: A motor and manual actuated switch includes a motor control circuit for controlling the motor to rotate in either a clockwise or counterclockwise direction to actuate a mechanical switch between the open circuit and short circuit states. The control circuit includes a capacitor coupled in series with the motor winding to form a series circuit and a control switch for connecting a source of d.c. power across said serial circuit when in a first position and a short circuit across said series circuit when in a second position. When the control switch is moved to the first position, the capacitor charges, causing a current to flow through the motor winding during the charge time, thereby causing rotation in one direction. When the control switch is moved to the second position, the capacitor discharges through the winding, thereby causing opposite current flow and shaft rotation.

Abstract: A friction feed media drive mechanism for a sign plotter includes a front idler roller and a back idler roller positioned under compression against a drive roller. The compression may be selectively applied by the user depending whether a friction feed or pin feed mode of operation is desired. Where the pin feed mode of operation is desired, the compression assembly is released and no compression is applied. The compression assembly includes a compression spring loaded member which fits through an opening in a housing and is selectively secured therein by a securing rod attached to a cam shaped knob. The front idler roller and back idler roller are both attached to a roller holding assembly, which has a groove therein adapted for fitting over the driving pins. The two idler rollers extend below the surface of the attaching assembly and may have a hard plastic sleeve on the ends thereof to reduce bending.

Abstract: A current detector for detecting the high frequency current flowing in a conductor includes a coil of high resistivity material wound around an non-ferromagnetic core. The coil is arranged in a substantially closed loop configuration around the conductor carrying the current to be measured. The ratio of the winding spacing to the cross sectional area of the coil is maintained constant over the length of the winding. A shield of high resistivity material surrounds the coil and is spaced from the coils and the shield has a gap oriented along an azimuth of the closed loop winding and directed orthogonal to the net current direction of the current induced in the coil. The ends of the coil are coupled to a high impedance voltage detector through high resistivity leads and a relatively low value resistor is coupled between the leads to reduce the quality factor.

Abstract: A screen installer tool includes a handle, a front portion and a rear portion. A circular disk is affixed to the front portioned and a second circular disk is affixed to the rear portion, each of which rotate as the screen installer tool is moved in a forward direction. The front roller has a convex edge and the thickness of the front roller is selected to fit within the channel of a screen frame, whereby the screen is formed in the channel as the tool is moved forward. The back roller has a concave edge for receiving and inserting a pliable spline material into the formed screen within the channel as the tool is moved. A spline path is provided from the back end of the tool to permit the spline material to easily inserted into the tool around the back roller as the tool moves forward and an idler roller, under spring tension, is provided to hold the spline material against the back roller.

Abstract: A current detector for detecting the high frequency current flowing in a conductor includes a coil of high resistivity material wound around an non-ferromagnetic core. The coil is arranged in a substantially closed loop configuration around the conductor carrying the current to be measured. The ratio of the winding spacing to the cross sectional area of the coil is maintained constant over the length of the winding. A shield of high resistivity material surrounds the coil and is spaced from the coils and the shield has a gap oriented along an azimuth of the closed loop winding and directed orthogonal to the net current direction of the current induced in the coil. The ends of the coil are coupled to a high impedance voltage detector through high resistivity leads and a relatively low value resistor is coupled between the leads to reduce the quality factor.

Abstract: Disclosed herein is an X-ray lithography system having a long life target. The life of the conventional target in X-ray generating systems for use in X-ray lithography systems is increased by providing means by which a single laser pulse can be provided to the same spot a plurality of times. In addition, new target designs are provided which are mechanically moved to allow laser pulses to be provided to adjacent points over a large surface area. One type of target is a cylindrical drum which is helically rotated to allow the laser pulse to intersect at all points along the helix of the drum. A second type of long life target is a long continuous strip in which a strip is moved from a feed reel to a take-up reel. The strip may be within a cassette.

Abstract: A clothes hanging stand rests against a wall when not used and extends from the wall when used. The stand includes a base member, an arm affixed in a pibotally manner to the base member and a leg which includes a bracket that slides over the base member and the arm to a position to hold the arm in a horizontal position when in use. When not in use, the leg slides back against the base member and the arm pivots downward so that both rest in a side by side vertical position against the wall. The base member may be include a U shaped bracket and the arm is affixed using a wire bracket interlooped with to the U shape bracket. A leg bracket is attached to the leg permitting it to slide over the base bracket, the arm bracket and the arm from the position resting on the U shaped bracket. The U shape base bracket mechanism may include retaining bends therein for retaining the leg bracket when in the nonuse position.

Abstract: An environmentally safe monitoring well cap has a base and a hingely rotatable cap attached to the base. The base includes a coupling section which fits around the monitoring well casing and the coupling sections includes a ledge having an O-ring position thereagainst for contacting the top of the casing to provide a fluid seal. In addition, a flange extends outward from the bottom of the base section and is encased in grout to prevent the removal of the cover. The cap rotates about hinges from base to cover the top of the base. A ridge and O-ring are provide for the cap to seat against the base to provide a fluid tight seal. In addition, a rotating locking member is provided to permit the cap to be locked in place and to be held under tension against the upper O-rings.

Abstract: Described herein is an improved target for use in a pulsed induced plasma X-ray lithography system. The target is formed as a disk shaped base having a series of concentric grooves formed on the side thereof incident to the focused laser beam. A plurality of small holes are fabricated through the base to the facing wall of the groove against which the laser beam is focused and a film, of a polyimide or silicon nitride material, covers the hole. A thin layer of metal target material is then placed on the film aligned with each hole. The thickness of the metal is selected to be sufficient to allow the complete ablation of the material during the existence of the X-ray emitting plasma. In this manner, a minimal amount of debris, either in the form of molten droplets or evaporated metal material, will be generated.