The clutching mechanism allows the engine to shut down when not needed, as when slowing for a stoplight or cruising.
Simply roll it out on a desk, floor, wall or door and let kids get creative with the markers and accessories, which neatly store away when not needed.
The market for "smart" appliances, which save energy by switching themselves off when not needed, is almost doubling every year.Regulations impose costs as well as save them.
CT scans have radiation risks and sometimes detect cancers that would not have progressed, leading to risky procedures like biopsies and lung surgery when not needed.
The 110-pound row is still designed to be rolled out the back of the vehicle when not needed and stored in the owner's garage.
A stainless-steel drying rack from the Martha Stewart Everyday line is a cut above rubber-coated wire models, folding flat when not needed.
Along with engine cylinders that shut down when not needed, there are two motor-generators in the transmission that provide electric propulsion when electronic sensors see fit.
And it's a good deal for the driver, who is typically on call and free to do as he wishes when not needed.
When not needed Royal Army Medical Corps (RAMC) staff sometimes went off on long walks or played cricket and football with teams from other trains.
When not needed Royal Army Medical Corps staff sometimes went on long walks or played cricket and football with teams from other trains.
For Texas, the domes, which are being built with help from the Federal Emergency Management Agency, offer an extra benefit: they can be recreation or community centers when not needed as shelters.
