Tape measure Totally Explained

Everything about Tape Measure totally explained

A tape measure or measuring tape is a flexible form of ruler. It consists of a ribbon of cloth, plastic, or metal with linear-measure markings, often in both imperial and metric units. Surveyors use tape measures in lengths on the order of hectometres. It is a convenient, common measuring tool. Its flexibility allows for a measure of great length to be easily carried in pocket or toolkit and permits one to measure around curves or corners.
   Tape measures intended for use in tailoring or dressmaking are typically made of flexible cloth or plastic, while those designed for carpentry or construction often use a stiff, curved metallic ribbon that can remain stiff and straight when extended, but retracts into a coil for convenient storage. This type of tape measure will have a floating tang on the end to aid measuring. The tang will float a distance equal to its thickness, to provide both inside and outside measurements that are accurate. A tape measure of 25 or even 1000 feet can wind into a relatively small container.
   One little-known feature on most tape measures is a small black diamond that appears every 19.2 inches, known as the 'black truss' markings. This is used to mark out an equal five trusses per standard eight-foot sheet of building material. (8 feet, or 96 inches, divided by 5 is 19.2 inches.)
   The design on which most modern spring tape measures are built was patented by New Haven, Connecticut resident Alvin J. Fellows on 14 July 1868. According to the text of his patent, Fellows' tape measure was only an improvement on other versions previously designed.
   The spring tape measure has been extant since Fellows' patent, but didn't come into wide usage until the early 1940s, when it slowly began to supplant the folding wood carpenter's ruler. Today it's ubiquitous, even appearing in miniature form as a keychain fob, or novelty item.

Safety

Metal retractable tape measures are relatively safe and easy to use. Extend the tape from point to point placing the end-clip at the location you want to measure from. Most tape measures have a clip (tang) that can be attached to a fixed object to measure spans easily. Many steel blade tapes have tension-control brakes that lock the blade in place for measuring spans. Longer (surveyor) tapes have a crank on the side of the case to retract the cloth tape.
Metal blade tapes must be retracted slowly, while keeping fingers away from the edges, to avoid getting slit fingers.

Maintenance

Metal retractable tape measures are virtually maintenance-free. To extend their life, keep the measurement blade clean and don't retract the blade into the case too fast.

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