Abstract: This invention relates to an EMI and EMP shield configured to arrest electromagnetic contamination of sensitive electrical and microprocessor equipment. Particularly, the present invention enables a positive dynamic seal for moving parts and joints by means of resilient and self-adjusting conductive contacts. The contacts provide electrical bonding, between otherwise separate and electromagnetically leaky joints, to arrest EMI and EMP contamination.

Abstract: A basic crane capable of lifting a predetermined load is equipped with an outrigger unit which, in one orientation, engages the ground to increase the lifting capacity of the crane to an intermediate level and, in a second orientation relative to the crane, is arranged to coact with members of heavy duty equipment which may be added to the basic crane to give it a heavy duty lifting capacity.

Abstract: A construction for a crane carbody and lower axle construction which permits use of either fixed or adjustable length axles with common tread members and carbodies, each of the tread members having sockets and a pair of adjustable length axles, each axle having a pair of side by side hydraulic rams, defining an offset therebetween connected to axle beams engageable with and secured to said sockets. A pair of fixed length axles, each having beam ends which are out of alignment by an amount equal to said offset so that the fixed and adjustable length axles are interchangeable.