Abstract: An internal combustion reciprocating engine includes a cylinder defining a main combustion chamber, a piston reciprocally movable in the cylinder, and a cylinder head providing an end wall for the main combustion chamber. A body is mounted in the cylinder head and is provided with an end wall substantially coincident with the main combustion chamber end wall, the body defining a pre-chamber and a passage interconnecting the pre-chamber and the cylinder. The body is in contact with the cylinder head only proximate the end wall of the body, the remainder of the body being insulated from the cylinder head, to store heat for heating air and vaporizing fuel introduced into the pre-chamber. A fuel inlet is in communication with the pre-chamber, and a spark source is mounted in the body and exposed to the pre-chamber.

Abstract: Umbrella apparatus includes a plurality of flexible support elements extending outwardly from a common location on a base cross piece. Flexible material is secured to the base cross piece and to the flexible elements. The umbrella apparatus is foldable when tension is removed between the flexible elements and the base cross piece.

Abstract: A vine crop harvester which includes cleaning or picking rolls sufficiently close to grip and feed the stalks, the rolls being intermittently reversed to back up the stalk portions having enlarged asymmetrical branch joints and permit free chance rotation of the stalks so that, when the rolls are again actuated for forward feeding movement, these stalk joints will have their less thick cross-sections presented to the bights of the rolls for passage therebetween.