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A gimlet is a hand tool for drilling small holes, mainly in wood, without splitting. It was defined in Joseph Gwilt's Architecture (1859) as "a piece of steel of a semi-cylindrical form, hollow on one side, having a cross handle at one end and a worm or screw at the other". [1] A gimlet is always a small tool.
Rotameters are not easily adapted for reading by machine; although magnetic floats that drive a follower outside the tube are available. [1] Rotameters are not generally manufactured in sizes greater than 6 inches/150 mm, but bypass designs are sometimes used on very large pipes. [2]
A hydropneumatic device is a tool that functions by using using water and gas. [1] Hydropneumatic refers to the pneumatic (gas) and hydraulic (water) components needed for operation of the devices.
This is the most commonly used measurement system for measuring water supply in houses. The fluid, most commonly water, enters in one side of the meter and strikes the nutating disk, which is eccentrically mounted. The disk must then "wobble" or nutate about the vertical axis, since the bottom and the top of the disk remain in contact with the ...
Spike mauls are akin to sledge hammers, typically weighing from 8 to 12 pounds (4 to 5 kg) with handles 30 to 36 inches (80 to 90 cm) long. They have elongated double faced hardened steel heads. The head is typically over 12 inches (30 cm) long to allow the user to drive spikes on the opposite side of the rail without breaking the handle.
It is a tool of preference for wood workers using chisels with plastic, metal, or wooden handles, as they give a softened strike with a positive drive. Wooden mallets are usually used in carpentry to knock wooden pieces together, or to drive dowels, chisels and to apply pressure on joints. A wooden mallet will not deform the striking end of a ...
An exploded view of an automatic center punch. An automatic center punch is a hand tool used to produce a dimple in a workpiece (for example, a piece of metal). It performs the same function as an ordinary center punch but without the need for a hammer.
By counting the number of teeth passing a mark on the handle while this is done, the length of the line can be ascertained: line length = wheel circumference × teeth counted/teeth on wheel. In more sophisticated models, sometimes called a chartometer , the wheel is connected via gearing to a rotary dial from which the line length can be ...