Abstract: There is disclosed a hydrogen powered internal combustion engine (12) having cylinders (22) for driving crankshafts (28). The crankshafts are configured to drive water pumps (32) which are for pumping water into engagement with drive faces (58) of a drive water wheel (44). This water wheel is connected to, and drives, a main propulsion shaft (30) which produces the main propulsion of the engine, for example, for powering a vehicle. One or more ancillary water wheels (46, 48) are driven by the pumped water and are connected to generators for producing electric current for powering an electrolysis device (78) which produces hydrogen that can be used as fuel by the engine.

Abstract: There is disclosed a traffic control intersection having a first road and a second road running crosswise relative to the first road. Pathways are provided to enable vehicles travelling along either of the roads to turn into the corresponding lane (leftmost or rightmost lane) in the other road. Two of the pathways extend over lanes of the second road but are at a different elevation to those lanes so that vehicles on these pathways are not obstructed by vehicles travelling along the lanes. The invention also extends to other, more complex intersection configurations employing a similar principal. Also disclosed is a traffic roundabout that defines a utility space for various uses, a pedestrian walkway, and a method of managing a road accident site.

Abstract: A device for attaching a laminar object such as a poster to a wall includes a plate having a rear face which is attachable to a wall and a boss which protrudes from a front face of the plate. The plate may include a layer of ferromagnetic material such as steel and may be attached to the wall by a plastic holding composite, a nail or pin or by adhesive. A hole may then be punched in a corner of a poster or other laminar object and that hole is placed over the boss which then supports the poster from the wall. A keeper which is may be made from a rubberized magnetic material and includes a through hole which is approximately the same size as the boss, is placed over the plate to retain the poster in place. Further weak magnetic attraction between the retainer and the ferromagnetic plate or an interference fit helps keep the retainer attached over the boss and retain the poster on the wall except in drafty conditions where the keeper releases the poster.