Abstract: A combination hammer, impact device, and screw driver has an elongated cylinder formed in the hammer handle in which is reciprocably carried a drive piston, spring urged under the force of a heavy spring, toward the open cylinder end at the base of the handle opposite the hammer head. The spring is adjustably preloaded for corresponding adjustable impact forces, compressed and then released to drive the piston in an outward direction after a predetermined inward movement of an impact piston, also reciprocably carried by the cylinder and extendable from the handle base. The impact piston carries a removable impact tool. The impact tools and the adjustment member for the spring preload are color coded to obtain proper matching of the impact force and tool. A hexagonal recess is formed in the hammer head in substantial longitudinal alignment with the handle with a magnet being secured in the bottom of the recess.

Abstract: A system for utilizing the weight and momentum of moving vehicles to produce usable energy comprising a fluid displacement pump positioned either under a moveable plate in a roadway or between the rail and railbed in a railway which compresses a fluid such as air or hydraulic fluid as the vehicle passes over, a low pressure line for supplying fluid to the pump chamber, a high pressure outlet line communicating with the chamber and connected to a manifold which is supplied with high pressure fluid from a number of other similar pumps and which directs the fluid to an energy conversion device such as a fluid motor and electric generator, or a fluid motor driving an air compressor, or to a fluid motor driving machinery in a factory or other industrial plant.