Abstract: A ratchet tool includes a handle having a number of inner teeth, a cartridge rotatably received in the handle and having a driving shank and having three side surfaces. Three pawls are rotatably attached to the side surfaces of the cartridge and each includes two end portions each having one or more teeth for engaging with the teeth of the handle, in order to control the driving direction of the cartridge relative to the handle. A control member includes three spring-biased projections for engaging with the pawls and for forcing the teeth of either of the end portions of the pawls to engage with the teeth of the handle, and to control the driving direction of the cartridge relative to the handle.

Abstract: Methods for allocating connections between nodes in an optical ring communications network are provided. In these methods, working path connections are assigned so that the combination of required wavelengths and wavelength interface cards (WICs) in the network is minimized. In one such method, the wavelengths for the working path connections are assigned so that lightpaths are connected around the ring to complete a circle. In another method, components of lightpaths are connected so that a linked component group of lightpaths is formed around the ring until no more connectable lightpath connections are available or until a complete circle is formed around the ring.

Abstract: An eccentric wheel of a bicycle including a wheel body, a pair of tracks formed in parallel in the wheel body, one or more holes formed in each of the tracks, a block slidably engaged between the tracks for supporting a wheel axle of the bicyle, a pair of pins slidably engaged in the block and extendible outwards of the block for engagement with the holes of the tracks, and a spring biased between the pins for biasing the pins outwards to engage with the holes.