Abstract: An LED lighting element having an H-shaped housing. The housing, which may be an extruded housing, has a first section and a second section which is separated from the first section by a cross bar. A back plate is positioned opposite of the crossbar and is removably secured to the first section. A heat sink is located within the housing while a microcontroller and LED drive/control technology and integrated power supply contacts the heat sink and is attached to the back plate. An LED PC board that is electrically connected to the microcontroller and LED drive/control technology and integrated power supply is positioned in the second section and is attached to the housing. An end cap for the housing along with a method for constructing the lighting element are also disclosed.

Abstract: A light fixture for and method of rotating a rotatable light source. The light fixture having a flange with a rotating member positioned within the flange. The rotating member houses a light source. A first self-lubricating ring is located proximal to the front of the flange and at least partially encircles the rotating member. A second self-lubricating ring is located distal to the front of the flange and also at least partially encircles the rotating member. A compression device, held in place by a retaining ring, is located behind the second self-lubricating ring.

Abstract: An LED lighting element having an H-shaped housing. The housing, which may be an extruded housing, has a first section and a second section which is separated from the first section by a cross bar. A back plate is positioned opposite of the crossbar and is removably secured to the first section. A heat sink is located within the housing while a microcontroller and LED drive/control technology and integrated power supply contacts the heat sink and is attached to the back plate. An LED PC board that is electrically connected to the microcontroller and LED drive/control technology and integrated power supply is positioned in the second section and is attached to the housing. An end cap for the housing along with a method for constructing the lighting element are also disclosed.

Abstract: A light emitting diode (LED) unit is therefore provided, comprising: an LED module, comprising: a plurality of LEDs; LED drive circuitry that drives the LEDs; an LED control bus that carries LED illumination control information to the LED drive circuitry; and a housing that at least partially surrounds LED module components; a power supply and control module, comprising: a power supply that converts a first voltage level to a second voltage level; a microcontroller that receives illumination instructions from an external source; an LED drive controller that receives lighting instructions from the microcontroller and transmits LED illumination information to the LED drive circuitry; a housing that at least partially surrounds power supply and control module components; an interface that connects the LED drive controller to the LED control bus.

Abstract: A portable, user shoulder supported spreader/blower unit includes an ergonomically configured housing which includes a section defining a storage bin for holding a quantity of salt or like chemical particulate material for spreading onto ground surfaces to prevent icing thereon in winter. A centrifugal distributor disk is located in a housing space section below the bin and, a bin discharge aperture aligns over a peripheral area of the distributor disk. A user controllable closure member selectively alters bin discharge aperture size and, hence, outflow quantity from the bin onto the distributor disk, the distributor disk rotating at high speed propelling particulate material out of the housing through a discharge nozzle thereon at a high speed. e.g., 60 m/sec when the unit is user in a spreader mode.

Abstract: A portable, user shoulder supported spreader/blower unit includes an ergonomically configured housing which includes a section defining a storage bin for holding a quantity of salt or like chemical particulate material for spreading onto ground surfaces to prevent icing thereon in winter. A centrifugal distributor disk is located in a housing space section below the bin and, a bin discharge aperture aligns over a peripheral area of the distributor disk. A user controllable closure member selectively alters bin discharge aperture size and, hence, outflow quantity from the bin onto the distributor disk, the distributor disk rotating at high speed propelling particulate material out of the housing through a discharge nozzle thereon at a high speed. e.g., 60 m/sec when the unit is user in a spreader mode.

Abstract: A large capacity centrifugal vacuum concentrator includes a rotor assembly mounting a plurality of vertical spaced rotors mounted on a drive shaft and intervened with spacers between each lower rotor and a rotor next above, the rotors and spacers having interengaging drive transmission means for transmitting drive to the rotors and spacers when the drive shaft is driven. The rotor assembly is enclosed by a, e.g., cylindrical stainless steel cover which sits on a base and with the base defines a vacuum chamber. When the cover is elevated to open position, four quadrant access is available for loading and unloading of samples on the rotors. The rotor assembly is made up of interchangeable rotors, spacers and vessel holder frames which are selected from families of such dependent on particular vessel capacity and holder frame requirements.

Abstract: A condenser cold trap unit for recovering as separate primary and secondary condensate fractions solvents contained in an effluent drawn from products being dried in a vacuum chamber includes inner and outer shell vessels, the inner shell vessel be disposed coaxially with the outer shell vessel inside said outer shell vessel with a space being present in the outer shell vessel under the bottom of the inner shell vessel and in a course surrounding the exterior of the inner shell vessel. A cover closes off the open tops of the two shell vessels and the interior space of the outer shell vessel is sealed from communication with outside atmosphere, and the interior space of the inner shell vessel is sealed from any communication with the interior space of the outer shell vessel. A common refrigeration coil encircles the exterior of the inner shell vessel and extends down therefrom to effect solvents condensing temperature levels cooling in both shell vessels.

Abstract: Apparatus and method for rapidly oscillating specimen containing vessels such as those used in an RNA recovery operation wherein small sized glass sized beads in the vessel are employed to disrupt the cell walls of an RNA component to release the RNA, includes a specimen vessel holder provided as a disc in which the containers are received. The disc is operably connected with oscillatory motion producing means that in operation oscillates the disc rapidly in an oscillatory movement up and down symmetrically of a fixed vertical axis. The disc is haltered so it cannot rotate about the fixed axis. Locking means in the form of a locking plate locks the vessels on the vessel holder and applies a clamping force thereto to prevent relative movement between the vessels and the holder to prevent generation of heat that could be of deleterious effect to the specimen material or the vessels holding same.

Abstract: A vial holding a material such as an organic liquid-containing biological specimen is received in the receptor of a holder assembly, the assembly further including a centrifugal valve. The holder is mounted on a rotor in a centrifugal vacuum concentrator and the specimen is then subjected to a treatment such as drying in the vacuum chamber. Vapor from the drying vents into the concentrator vacuum chamber, the centrifugal valve which is a normally closed component opens due to imposition thereon of centrifugal force created during and attending rotor speed above a certain RPM. At completion of the treatment and before the rotor falls from its certain RPM, a dried material protective gas blanket can be flowed into the vial, the valve closing to seal the vial and protected contents when RPM of the rotor falls below the certain RPM.

Abstract: Acid digestion of liquid specimens which are to be subsequently analyzed by spectroscopy to identify recoverable or dissolved metals is effected in an open digestion operation in apparatus which includes inclined, vertically spaced saddles on which specimen containing glass jars are supported in corresponding inclined orientation so that a surface of the specimens in the jars is overlaid by the wall of the jar and the jar opening is remote from the specimen, this arrangement allowing that the vessel wall facing the specimen surface, during digestion, will serve as a condensing surface for specimen vapors evolved incident digestion.

Abstract: An interlock system for use in an array of retractable storage cradles. The instant system prevents the opening of more than one cradle at one time through a slide modified generally by a biased cam insertion-extraction means and a column of movable components. The system can be used in free-standing file cabinets as well as prefabricated and modular storage units.

Abstract: An article transfer arrangement of the type which is utilized to retrieve and store articles which are arranged in a matrix of compartments, such as in a warehouse. In a preferred embodiment, a push member which urges an article on the transfer arrangement into a selected one of the storage compartments is provided with a latching mechanism which facilitates withdrawal of an article which has become jammed during the storage procedure as a result of misalignment. In embodiments where the articles are tote bins of the type which are generally used in such storage systems, the exterior of the tote bins is provided with a depending member having push and pull surfaces. During the storing procedure, the push member communicates with the push surface of the depending member while the latching mechanism latchingly communicates with the pull surface.