Abstract: The biosafety cabinet has a frame, which defines an enclosed work area and a front access opening, and a work surface along the bottom of the work area. One or more intake openings are positioned along the front access opening adjacent the work surface, a recirculation duct is in fluid flow communication with the intake holes, a supply filter is in fluid flow communication with the recirculation duct, and a supply blower is positioned upstream from the supply filter in fluid flow communication with the recirculation duct. One or more exhaust openings extend along the work surface, wherein at least one exhaust opening is positioned adjacent the front access opening rearward of the intake holes. The exhaust openings are in fluid flow communication with an exhaust duct, an exhaust filter, and an integral exhaust blower.

Abstract: A portable fingerprint development system having a container and a base plate. The container includes a plurality of joined walls that present an opening and a rim surrounding the opening. The base plate has opposed first and second surfaces. The first surface mounts a heater that is operable to heat a fingerprint development material. The base plate is moveable between a transport position, in which the first surface is adjacent the container's rim and the heater is positioned within the container, and an operation position, in which the second surface is adjacent the container's rim to enclose an interior volume defined by the container's walls and the base plate. Preferably, an exhaust system is mounted on the first surface of the base plate for removing and/or filtering fumes within the container.

Abstract: A hot beverage brewing and dispensing machine having a brewing cylinder for receiving a hot liquid and a beverage product for brewing, a base member beneath the brewing cylinder with a brewed liquid outlet through which beverage brewed in the brewing chamber can flow, a seal between the base member and a bottom end of the brewing cylinder with a filter material therebetween for sealing the cylinder during brewing when the brewing cylinder is brought into engagement with the filter material, a filter feed mechanism, a tube for supplying liquid and a chute for supplying beverage product to an upper portion of the brewing cylinder, and a conical dispersing surface disposed at the upper portion of the brewing cylinder upon which the liquid and beverage product impinge from their supply means and which disperses the liquid and beverage product as they fall to a bottom portion of the brewing cylinder washing the cylinder walls.

Abstract: A beverage dispensing machine is provided and is of the type having a cup station, a cup holder for holding a plurality of cups, a cup delivery for delivering one of the cups at a time to the cup station, a beverage dispenser for dispensing beverage to the cup station, and controller for controlling operation of the cup delivery and the beverage dispenser. The controller being adapted to initiate a cycle of operation of the machine upon activation of the controller wherein the cup delivery delivers a cup to the cup station from the cup holder and the beverage dispenser dispenses a predetermined quantity of beverage to the cup in the cup station. The improvement comprises a detecting mechanism for engaging and detecting the presence of a container inserted into the cup station prior to activation of the controller.