Abstract: A security device for a bill changer that greatly reduces the risk of the coinage within the changer from being robbed. The security device includes a support having a bill insertion slot therethrough. The support is adapted to be securely attached to a front surface of a bill reader with the insertion slot aligned with a corresponding slot of the bill reader. A moveable blade is mounted on the support and detaches foreign objects extending from an inserted bill. An actuator member, preferably comprising two solenoids, is connected to the blade for moving the blade across the insertion slot in response to validation of an inserted bill by the bill reader to detach any foreign objects therefrom.

Abstract: A method an apparatus for disposing of urine is described comprising a funnel-like basin connected to a pump housing. The housing contains a fluid pump connected to the drain of the basin and activated by a fluid pressure sensor when the fluid pressure in the basin exceeds a predetermined value. The housing also contains means for connecting an external fresh water supply to the basin when the fluid pressure in the basin drops below a predetermined value.

Abstract: A medium for the shipment and preservation of organ-derived cells and method for its use. The shipping medium is in a firm, substantially semi-solid state at ambient and chilled temperatures, but becomes substantially fluid upon reaching body temperature. The medium in its fluid state can be poured over cultured cells or tissue slices or used to suspend isolated cells and then can be chilled to reach its semi-solid state for shipment. The firm, semi-solid nature of the medium and the presence of various components preserves organ-derived cells for a longer period of time during shipping than the preservation time achieved by using conventional liquid medium, better protects the organ-derived cells during shipment, effectively eliminates spillage during transport, and is easily used by researchers who supply preserved organ-derived cells as well as by researchers who receive the preserved organ-derived cells for experimentation or research.

Abstract: A folding knife holder and method, whereby a folding knife can be safely carried in an elongate knife holder, comprising a housing member that has an elongate recess defined by a base surface, side surfaces and end surfaces, and sized and shaped to receive the knife in an orientation that is substantially parallel to the base surface, with the spine of the knife laying against the base. The margin of the walls of the housing member define an elongate orifice opening into the recess. The orifice is partially occluded at one end by a strike member. The strike member has a gap, wider than the knife blade. When the back of the knife blade is grasped and pulled in an outward direction, the knife blade will pass through the gap in the strike member and the strike member will blockingly engage the butt of the knife handle, thereby allowing the knife blade to be pivotably rotated into an open position.