Abstract: A gas chromatography system comprising a sample introduction device, an oven coupled to the sample introduction device and a detector coupled to the oven is disclosed. In certain examples, the oven may be configured to receive a chromatography column in a space in the oven. In some examples, the oven may be constructed and arranged to provide a substantially constant temperature to the space during an analysis stage of the gas chromatography system.

Abstract: The present invention relates to a merchandise rack that can be used to store, transport and display merchandise without ever having to remove the merchandise until the consumer does. The invention comprises a base unit and upright end sections extending therefrom for supporting multiple shelves therebetween, wherein multiple support elements are provided on each of the end sections to vary the level and angle at which the shelves are supported. More than one shelf can be provided per level and tilted in opposite directions to provide better visibility and accessibility during display. The base unit and end sections are also modular so that the frame can be stacked either with or without the end sections and shelves attached.

Abstract: A microprocessor-controlled airfield lighting control and monitoring system having bi-directional communication between the controlling microprocessor and the airfield lights and/or sensors. The system also includes a metal container for the remote control microprocessor and an improved attachment arrangement for the power transistor associated therewith. A DC power supply is connected to the remote controller microprocessor and has an integrated circuit adapted to sense a threshold voltage, which causes the power transistor to short around the associated power source.

Abstract: A tray for the transport of nursery plants and the like has a bottom and movable side walls. The side walls may be easily placed in one of three positions. When in the lowermost position, the side wall is even with or below the bottom for allowing plants to be loaded or unloaded. After plants are loaded, the side wall is placed in middle or upper positions to retain the plants on the tray during transport. The side walls are retained on the tray by brackets that are configured to prevent dislodgment during vertical motions incident to bouncing of the vehicle during transport.

Abstract: An improved shelving assembly for transporting and displaying goods on a carrier incorporates a cylindrical shoe with a rounded top and a lower flange that compliments the shape of a series of posts set into the bed of the carrier. The posts set into the bed of the carrier are preferably arranged so that the shelving units tilt inward toward the center of the truck bed, thereby reducing the shifting and spillage of items placed on the units while at the same time shifting the weight of the load toward the center of the carrier bed.

Abstract: A microprocessor-controlled airfield lighting control and monitoring system having bi-directional communication between the controlling microprocessor and the airfield lights and/or sensors. The system also includes a metal container for the remote control microprocessor and an improved attachment arrangement for the power transistor associated therewith. A DC power supply is connected to the remote controller microprocessor and has an integrated circuit adapted to sense a threshold voltage, which causes the power transistor to short around the associated power source.

Abstract: A tray for transporting and displaying merchandise includes a bottom for supporting the merchandise, a sidewall for retaining said merchandise on the bottom, and foot members which are capable of engaging another, vertically adjacent tray. The sidewall includes a first side portion which is mounted for movement between a first position for retaining the merchandise on the bottom and a second position for permitting the merchandise to be removed. During shipment, the sidewalls are vertical to retain the merchandise. After the tray has reached its destination, the sidewalls are lowered to display the merchandise and permit it to be removed from the tray by the customer.

Abstract: A composite assembly includes a first catheter having a lead grasping mechanism extending through a channel thereof, a second catheter concentrically disposed over the first catheter and having a smooth, tapered end and a third catheter concentrically disposed over the second catheter and is used to remove an inoperative endocardial lead from a patient's heart through a venous path. A free end of the lead is grasped and held securely to the first catheter by a grasping mechanism. The second and third catheters then are slid as a unit through the venous path over the grasped end of the lead as opposing tensile force is maintained on the first catheter to prevent movement of the lead. The second catheter is rotated to cause its smooth, tapered, leading edge with outward sharp serrations to separate scar tissue from the lead and dilate a path through the scar tissue.

Abstract: An apparatus and method is provided for separating scar tissue through a venous path to allow passage of an endocardial lead extracting apparatus into a patient's heart. A metal cannula having a smooth leading edge is manipulated in conjunction with a lead grasping device to slip the metal cannula over the lead to be removed, controlling advancement of the cannula with a cannula control catheter until the leading edge of the cannula is advanced a predetermined distance into the scar tissue. A metal shearing cylinder having a plurality of sharp teeth disposed on its leading end and controlled by a cylinder control catheter is advanced over the surface of the cannula, depressing a locking element thereof and to lock the cannula to the lead. Further advancement of the cylinder causes its teeth to separate a thin layer of the scar tissue. The cylinder is retracted to unlock the cannula, which is advanced. The shearing cylinder is advanced, relocking the cannula and separate a further portion of the scar tissue.

Abstract: A composite assembly includes a first catheter having a lead grasping mechanism extending through a channel thereof, a second catheter concentrically disposed over the first catheter and having a smooth, tapered end and a third catheter concentrically disposed over the second catheter and is used to remove an inoperative endocardial lead from a patient's heart through a venous path. A free end of the lead is grasped and held securely to the first catheter by a grasping mechanism. The second and third catheters then are slid as a unit through the venous path over the grasped end of the lead as opposing tensile force is maintained on the first catheter to prevent movement of the lead. The second catheter is rotated to cause its smooth, tapered, leading edge with outward sharp serrations to separate scar tissue from the lead and dilate a path through the scar tissue.

Abstract: An intravenous lead assembly for atrial ventricular (AV) sequential pacing includes a channel and a separable core lead. The channel lead and the core lead respectively include first and second helical coil conductors through which first and second wire stylets can be inserted. The first and second helical coil conductors are embedded in first and second elongated silicone rubber sleeves, respectively. The silicone rubber sleeve of the channel lead includes an elongated channel. In use, the core lead is passed through the channel of the channel lead either before or after the channel lead is passed through selected veins into a patient's heart. Handles are provided on the proximal ends of the stylets to enable a physician to manipulate the distal ends of the channel lead and core lead.

Abstract: An intravenous lead assembly for atriolventricular (AV) sequential pacing includes a channel and a separable core lead. The channel lead and the core lead respectively include first and second helical coil conductors through which first and second wire stylets can be inserted. The first and second helical coil conductors are embedded in first and second elongated silicone rubber sleeves, respectively. The silicone rubber sleeve of the channel lead includes an elongated channel. In use, the core lead is passed through the channel of the channel lead either before or after the channel lead is passed through selected veins into a patient's heart. Handles are provided on the proximal ends of the stylets to enable a physician to manipulate the distal ends of the channel lead and core lead.

Abstract: A gas sampling system and method which employ a vacuum pressure regulator in a gas sampling train to simplify isokinetic sampling at selected locations of a sampling nozzle in a gas conducting flue.