| abstract |
A scabbard for receiving and protecting the blade of a knife and including a device which functions to sharpen the cutting edge of the blade as the blade is inserted into and withdrawn from the scabbard. The sharpening device is pivotally mounted so as to present a respective sharpening edge according to the direction of longitudinal movement of the blade relative to that device, and a cushion spring bears on the sharpening device to limit the pressure acting between the knife blade and the sharpening device, during the sharpening operation. Means is also provided to normally urge the knife blade into engagement with the sharpening device. |