Abstract: A gear reduction assembly for industrial robotics arms with an anti-backlash mechanism for precise positioning of the robotic arm. The gear reduction assembly includes two transfer gears and two internal gears. The two internal gears include a fixed gear that is fixedly coupled to a gear housing and an output gear that is coupled to an output shaft. The gear reduction assembly further includes a drive plate that is integral to the input shaft and is of an elongated profile. The two transfer gears are mounted to the drive plate, spaced apart from each other, and can freely rotate relative to the drive plate. The two transfer gears mesh with the fixed gear and the output gear, wherein the input shaft passes through the center of the fixed gear. The number of teeth in the fixed gear and the output gear are different which results in gear reduction.

Abstract: A gear reduction assembly for industrial robotics arms with an anti-backlash mechanism for precise positioning of the robotic arm. The gear reduction assembly includes two transfer gears and two internal gears. The two internal gears include a fixed gear that is fixedly coupled to a gear housing and an output gear that is coupled to an output shaft. The gear reduction assembly further includes a drive plate that is integral to the input shaft and is of an elongated profile. The two transfer gears are mounted to the drive plate, spaced apart from each other, and can freely rotate relative to the drive plate. The two transfer gears mesh with the fixed gear and the output gear, wherein the input shaft passes through the center of the fixed gear. The number of teeth in the fixed gear and the output gear are different which results in gear reduction.

Abstract: A key locking indicator device usable with a key of conventional design for tactile and visual indication of whether the device was last used to look or unlock the look operated by the key. The device is of simple construction, embodies a minimum number of moving parts, and is easy to use.