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The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...
On September 1, 2016, DeWalt debuted its FlexVolt hybrid voltage battery pack that can switch between series battery wiring providing 60 V (54 V nominal) and 2 Ah, or parallel wiring for 20 V (18 V nominal) and 6 Ah, depending on whether it is installed in a 60 V or 20 V tool, determined by communication between the tool and battery. [10 ...
A laser line level is a tool combining a spirit level and/or plumb bob with a laser to display an accurately horizontal or vertical illuminated line on a surface the laser line level is laid against. Laser line levels are used wherever accurate verticals and horizontals are required, typically in the construction and cabinetry industries. Some ...
The term dumpy level (also builder's level) endures despite the evolution in design. They can be manual or automatic, the latter being much quicker to set up. A tilting level is a variant which has a precision vertical adjustment screw which tilts both the telescope and the high accuracy bubble level attached to it to make them level. This ...
A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]