Abstract: A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the handles and operators grip remain in the same position. The chainsaw also incorporates an easy to use chain adjustment.

Abstract: A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the operators grip on the saw remain in the same position. The chainsaw also incorporates an easy to use chain adjustment.

Abstract: A wastewater treatment apparatus having a fixed film media apparatus having insertable high surface area polymer cartridges providing growth surfaces for autotrophic or heterotrophic bacteria and a protective shielding surface which isolates the biofilm from turbulence within the wastewater treatment system. A method of placement of said media apparatus within the aeration and/or clarifier section of the wastewater treatment apparatus.

Abstract: A wastewater treatment apparatus having a fixed film media apparatus having insertable high surface area polymer cartridges providing growth surfaces for autotrophic or heterotrophic bacteria and a protective shielding surface which isolates the biofilm from turbulence within the wastewater treatment system. A method of placement of said media apparatus within the aeration and/or clarifier section of the wastewater treatment apparatus.

Abstract: An adaptor for use with a light-communication device including a frame and a light guide on the frame. The light guide has a first light port assembly to receive a light signal from a light-communication device, a second light port assembly to output a light signal received by the first light port assembly, and a light transmission element for directing a light signal in a predetermined path between the first and second light port assemblies. The adaptor may be used in a system with two or more light-communication devices. Also provided is a method for communicating light signals between light-communication devices.

Abstract: A battery charger includes a first portion of a charging circuit with first and second terminals, a detector for detecting a selected signal sequence in the charging circuit, and a regulator for switching from a first output level to a second output level in the charging circuit in response to the detector detecting the selected signal sequence. A communication unit has a port for a rechargeable battery and includes a second portion of the charging circuit through the battery port with third and fourth terminals connectable with the first and second terminals and fifth and sixth terminals connectable to terminals of a rechargeable battery when in the port. The communication unit also has a switch in the second portion of the charging circuit controlled by a processor, with the processor adapted to control the switch according to the selected signal sequence when a battery is in the port which requires the second output level.