Abstract: An aircraft tire and an associated landing gear apparatus which rotate a wheel of a landing aircraft prior to contact between the wheel and a runway. The tire possesses an array of projections which have a forward face for catching air and which are molded into the tire in at least one channel circling the tire tread on at least one sidewall of the tire. The tire preferably possesses one or more belts underneath those projections situated in channels to protect the integrity of the tire's shape. A landing gear apparatus which may be used in conjunction with the aircraft tire comprises a duct mounted adjacent to the tire which receives air, reroutes it, and releases it into at least some of the forward faces of the projections so as to effect a further forward rotational force on the tire and wheel.

Abstract: A reusable resilient package particularly for the shipment of beverage cans is provided having at least two mating half sections, each containing at least one pair of mating recesses, one recess of each pair receiving half of a lengthwise section of a beverage can of one size and the other recess of each pair receiving half of the lengthwise section of a beverage can of different size having a like diameter but shorter length, said two half sections in one position receiving in each pair of recesses a can of one size and a can of different size and, in a second position, receiving in each pair of recesses two cans of said different size.

Abstract: A fireplace heating system is provided having a fireplace box having a fireplace opening therein, a heat chamber surrounding said box, a plurality of spaced generally vertically extending flues connected to said fireplace box and holding said box suspended generally centrally of said heat chamber, said flues being adapted to carry the exhaust gases from the fireplace box, a hot air distribution duct connected to said heat chamber and surrounding the said flues over a portion of their length, said distribution duct having discharge vent means into the room being heated, a pre-heat chamber spaced from the heat chamber and the hot air distribution duct and surrounding said flues over a second portion of their length, a cold air inlet connected to said pre-heat chamber, a blower connected to said pre-heat chamber on the side of the pre-heat chamber opposite the cold air inlet receiving preheated air passing around the second portion of said flues from said pre-heat chamber for delivery to the heat chamber and chi

Abstract: A fireplace heating system is provided having a fireplace box having a fireplace opening therein, a heat chamber surrounding said box, a plurality of spaced generally vertically extending flues connected to said fireplace box and holding said box suspended generally centrally of said heat chamber, said flues being adapted to carry the exhaust gases from the fireplace box, a hot air distribution duct connected to said heat chamber and surrounding the said flues over a portion of their length, said distribution duct having discharge vent means into the room being heated, a pre-heat chamber spaced from the heat chamber and the hot air distribution duct and surrounding said flues over a second portion of their length, a cold air inlet connected to said pre-heat chamber, a blower connected to said pre-heat chamber on the side of the pre-heat chamber opposite the cold air inlet receiving preheated air passing around the second portion of said flues from said pre-heat chamber for delivery to the heat chamber and chi

Abstract: Means are provided for joining a pair of foundry flasks which includes in combination one half of a V-shaped dove tail flange along each adjacent edge to be joined so as to form a V-shaped dove tail clamp and generally C-shaped clamp member having a jaw at each end adapted to slidably engage the dove tail flange and having a central depending tongue between the jaws adapted to bear on the two adjacent flanges at this juncture.