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The principle of using a helping hand requires the fixation of a work piece, so that the user can use his body or extremities with total freedom of movement. A similar example is a vise. There are various types of hand tools and similar instruments for assistance or temporary support for work, crafts and even for other tools, such as: Clamp ...
A screen magnifier is software that interfaces with a computer's graphical output to present enlarged screen content. It allows users to enlarge the texts and graphics on their computer screens for easier viewing. Similar to desktop video magnifiers, this technology assists people with low vision.
Magnifier was first included as a sample in the Active Accessibility SDK/RDK for Windows 95 and later made a standard Windows utility starting with Windows 98. Prior to Windows Vista, Magnifier could be used to magnify the screen up to 9 times its normal size. Windows Vista and later allow up to 16× magnification.
A 36 in (910 mm) reach extender with a secondary trigger and a pole that can be rotated 90 degrees. A reach extender (or reacher, grabber arm, helping hand, trash picker, picker-upper, extended gripper, long arm gripper, extended reach grabber, grabber tool, litter picker, or caliper) is a handheld mechanical tool used to increase the range of a person's reach and grasp when grabbing objects.
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As the user moves the pointer or cursor the screen magnifier should track with it and show the new enlarged portion. If this tracking is jerky or flickers it is likely to disturb the user. Also, the pointer or cursor may not be the content of interest: for example, if the user presses a keyboard shortcuts that opens a menu, the magnified ...
Thus, while a "full page magnifier" based on a fresnel lens can span some 625 cm 2 (96.9 sq in) , it typically achieves no more than 1.4x magnification (advertised as "2x" if measured by area instead of the scale factor); an aspheric segment hand magnifier can achieve a scale factor in excess of two (area factor in excess of four) but typically ...
A hand tool is any tool that is powered by hand rather than a motor. [1] Categories of hand tools include wrenches, pliers, cutters, files, striking tools, struck or hammered tools, screwdrivers, vises, clamps, snips, hacksaws, drills, and knives. Outdoor tools such as garden forks, pruning shears, and rakes are