Abstract: A fire extinguishing blanket formed of a porous, fire resistant fabric covering surrounding a cellulosic sorbent layer is provided. The fire extinguishing blanket is well suited for extinguishing a grease fire as the fabric covering smothers the fire and the sorbent material absorbs the grease. The covering and any stitching to secure it are formed of fire resistant aramid materials which will not ignite at the temperature of a grease fire. The sorbent is selected to be one which will not melt at the temperature of a grease fire.

Abstract: A ball projecting device, preferably pneumatically operated, is provided wherein the projected ball has "spin". The device comprises a projection tube including a curved portion, wherein the area of maximum curve radius of the curved portion, preferably is provided with a material having a high coefficient of friction; the ball is caused to roll along this high friction area, thereby imparting spin. The tube is preferably pivotable about two transverse axes, such that the elevation and spin-directing orientation of the tube end can be adjusted. The curved portion of the projection tube has a device for varying the radius of curvature from substantially infinite, i.e., a straight tube, to the desired minimum value.