Abstract: Provided herein are energy storage devices. In some cases, the energy storage devices are capable of being transported on a vehicle and storing a large amount of energy. An energy storage device is provided comprising at least one liquid metal electrode, an energy storage capacity of at least about 1 MWh and a response time less than or equal to about 100 milliseconds (ms).

Abstract: A device utilized in conjunction with an automatic nail gun for dispensing preformed tabs from a roll to a location adjacent where nailing is to take place, this device comprising a housing having an upper portion, front and back portions, and a lower member. The lower member is adapted to be brought into close proximity with a surface upon which nailing is to take place. The housing also has components for removably securing the housing in an operative relationship adjacent the automatic nail gun. An inner chamber is defined in a mid portion of the housing, in which chamber a roll of preformed tabs is contained, with an opening being provided through which the end of the roll of tabs is to move under the portion of the adjacent nail gun at which nailing is to take place. An actuating lever is rotatably mounted on the housing and is operably connected with a tab advancement device.

Abstract: A stone block, cutting chain saw having an improved drive sprocket and chain link design is disclosed. The sprocket itself is formed using rectangular, preferably square, shaped teeth which engage corresponding receiving areas on the cutting chain. In the preferred embodiment, the teeth are formed of carbide steel. The sprocket having the improved teeth design is rotably attached to a drive shaft. The cutting chain continuously revolves around the drive sprocket and at least a second sprocket, so that rotary motion over both sprockets enables the continuous cutting of stone, rock, coal and the like.