Abstract: An improved complementary logic driven level shifter which typically improves switching speed over the prior art diode-type circuit, and allows for symmetrical delays for both high-to-low and low-to-high transitions, thus reducing settling times. The complementary CMOS and not-CMOS inputs to the level shifter are applied to the gates of a pair of P-channel FETs and also to the gates of a pair of N-channel FETs. The sources of the P-channel FETs are coupled to a current source. The drain of each P-channel FET is coupled to the drain of the N-channel FET to which its gate is coupled, and also to the anode of a diode. The cathodes of the two diodes, and the sources of the N-channel FETs are coupled together to the anode of a grounded cathode diode. The output SELECT is the common connection point of the drains of the FETs whose gates are coupled to not-CMOS, and the complementary not-SELECT output is the drains of the FETs whose gates are coupled to CMOS.

Abstract: A utility knife having replaceable blades is provided having a handle with an exterior surface and an interior. A slide member is slidingly mounted in the interior of the handle. A blade is removably mounted to the slide member such that, in a first position, the blade is contained completely within the handle and, in a second position, the blade extends partially out of the handle. A shell is hinged to the handle at the exterior surface. The shell includes a central cavity shaped to receive replacement blades. Further, a utility knife having replaceable blades is provided having a handle with a first casing and a second casing. A hinge member is mounted to the first bottom edge and the second bottom edge such that the first casing can be rotated with respect to the second casing from a closed position to an open position. A slide beam is slidingly mounted on the first casing. A blade is removably attached to the front end of the slide beam.

Abstract: This invention relates to an apparatus and method for diluting a chemical concentrate. More particularly, dilution control is achieved by monitoring two flow meters, comparing the flow rate information, and adjusting the diluent flow to achieve a predetermined dilution of the chemical concentrate. An air push is preferably used to deliver the chemicals to the utilization points. Also a controller is used to prioritize requests from the utilization points in a hierarchal fashion.

Abstract: An enclosure apparatus for preventing injury to a person using a trampoline of the type having a plurality of spaced apart vertical legs supporting a horizontally disposed frame surrounding a bed, the enclosure apparatus including a plurality of panel assemblies, each of the panel assemblies including an elongated horizontal member having a first end and a second end, two elongated vertical members having a top end and a bottom end, the top end of one on the two vertical members being connected to the first end of the elongated horizontal member and the top end of the other of the two vertical members being connected to the second end of the horizontal member, a plurality of vertical ropes connected to the elongated horizontal members and to the frame, a plurality of horizontal ropes connected to the elongated vertical members, opening means in one of the panel assemblies for permitting a user of the trampoline to enter the enclosure apparatus, the plurality of panel assemblies being connected to the frame ad

Abstract: A three part apparatus for exercising and conditioning the hand of the user including a first metal sphere, a second metal sphere and a pivot ring positioned between, and touching, the first and the second sphere, the pivot ring being generally circular in shape and having a hole in the center thereof for receipt of a portion of each sphere, the pivot ring having two parallel faces which are perpendicular to the central longitudinal axis of the pivot ring and a magnet therein for holding said pivot ring to one of the spheres.

Abstract: A filing cabinet with a frame defining an enclosure and having two or more drawer openings; a door is hinged to the frame at the bottom of each opening, each door being swingable downward to reach a substantially horizontal position and swingable upward to reach a substantially vertical closed position; links are provided to connect the frame to the door to hold the door in the horizontal position; a drawer is provided at each opening and is mounted on rollers so that it may be rolled out of the enclosure onto the door in the opened position; the doors are locked in the vertical position when one of the doors is in the horizontal position.