Abstract: A device for holding a saw chain during sharpening of the chain cutters which prevents wobble by gripping both the cutter train and the drive train of the saw chain.

Abstract: The improved furnace of this invention may be used to produce heat by the burning of wood or other combustible matter. The furnace has a combustion chamber with a generally vertical axis and a chamber access door for loading combustible matter into the furnace. The access door in its normally closed position lies in a plane extending upwardly and outwardly from the axis of the chamber. A smoke limiting means which is positioned above the access door extends to the plane of closure of the door. This smoke limiting means limits the escape of smoke and other combustion products when the access door is open. The smoke limiting means may have a port for visually observing the interior of the chamber and for admitting a poker therein. An air injector extending through the door directs air to the burning material within the combustion chamber. The access door may have attached to it a grate extending into the chamber for holding the combustible material as it burns.