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Put your newfound skills to the test! What is the measurement over the range marked by the red lines? Use every technique at your disposal to come up with the answer as quickly as you can. Let's start simple. The distance from the 2" to 3" marker is, of course, 1". A little more difficult. Break it down into simpler parts. To find the middle of these two numbers, multiply the denominator by 2.

Halfway between these two numbers? This measurement is very precise. Find the closest number and put it in terms of 32nds. Shop all tape measures for sale from Johnson Level. On a standard tape measure, the biggest marking is the inch mark which generally has the biggest number, if it has them. As the increments decrease, so does the length of the mark.

Read 1 inch. The space from the largest mark to another is 1 inch. Read one-half inch. Same principle as reading one inch, only this time the space between the second-biggest mark and the biggest is read.

You can think of a half-inch mark as half way between a full inch. The tape could be returned to the case by sliding a button on the side of the case which then allowed the spring to pull the tape back into the case. On 3 January , Hiram A. Farrand received patent 1,, for his concave-convex tape, a major improvement for spring pocket tape measures. It was Farrand's concave-convex tape that went on to become the standard for the majority of pocket tape measure tapes today.

The first patented for a long tape measure in the United States was patent 29, issued July 10, to William H. Paine of Sheboygan, Wisconsin, [6] and produced by George M. Eddy and Company of Brooklyn, New York. This tape had no increments on it. It accurately measured only a distance equal to the total length of the tape from beginning to end marker, a brass piece attached to the tape at a measured distance.

The measured length was marked on the case or crank. Later, by the early s, Justus Roe of Patchogue, New York added rivets attaching small brass washers to the tape to mark inches and feet. They were attached every inch in the first and last foot and every foot from one to the end of the last foot.

A small brass tag, marked with a number indicating the number of feet to that point, was attached every five feet. This feature was never patented, but Justus Roe and Sons produced tape measures, "Roe Electric Reel Tape Measures", with this feature during the s and early s when they started etching or stamping increments and numbers on the tapes.

The "electric" part of the name was purely an affectation; there was nothing electrical about it. The basic design on which all modern spring tape measures are built can trace its origins back to an patent by a West Meriden, Connecticut resident named William H. Bangs Jr. According to the text of his patent, Bang's tape measure was an improvement on other versions previously designed.

The spring tape measure has existed in the U. In the late s, carpenters began slowly adopting H. Farrand's design as the one more commonly used. This design is the basis for most modern pocket tape measures used today. With the mass production of the integrated circuit IC the tape measure has also entered into the digital age with the digital tape measure. Some incorporate a digital screen to give measurement readouts in multiple formats.

An early patent for this type of measure was published in There are also other styles of tape measures that have incorporated lasers and ultrasonic technology to measure the distance of an object with fairly reliable accuracy. Tape measures often have black and red measurements on a yellow background as this is the optimal color combination for readability. Justus Roe, a surveyor and tape-maker by trade, made the longest tape measure in , at feet m.

The Northern Virginia Surveyors Association presented the foot, gold-plated surveyor's tape measure to Mickey Mantle in Some tapes sold in the United States have additional marks in the shape of small black diamonds, which appear every These are used to mark out equal spacing for joists five joists or trusses per US standard 8-foot 2, mm length of building material.

Many US tapes also have special markings every 16 inches mm , which is a US standard interval for studs in construction. Three spaces of 16 inches make exactly 4 feet 1, mm which is the US commercial width of a sheet of plywood , gyprock or particle board.

For example, in some Walmarts there are Hyper Tough brand tapes available in both US customary units and Metric units. So, the inclusion of a metric scale requires the measuring device either to contain 3 scales of measurement or the elimination of one of the US Customary scales. The use of millimeter only tape measures for housing construction is a part of the US metric building code.

Millimeters produce whole integer numbers, reduce arithmetic errors, thus decreasing wastage due to such errors. The US made measuring tape shown on the right is interesting in that it is a "Reverse Measuring Tape", where the measurements can be read from right to left just as well as they can be read when the tape is used from left to right. The metric roll-up tape shown is a millimeter only tape measure.

The building industry was the first major industry grouping in Australia to complete its change to metric , being completed by January In this the industry was grateful to the SAA now Standards Australia for the early production of the Standard AS "Metric Units for Use in the Construction Industry", which specified the use of millimetres as the small unit for the metrication upgrade.

In the adoption of the millimetre as the "small" unit of length for metrication instead of the centimetre the Metric Conversion Board leaned heavily on experience in the UK and within the ISO , where this decision had already been taken.

This was formally stated as follows: "The metric units for linear measurement in building and construction will be the metre m and the millimetre mm , with the kilometre km being used where required.

This will apply to all sectors of the industry, and the centimetre cm shall not be used. The logic of using the millimetre in this context was that the metric system had been so designed that there would exist a multiple or submultiple for every use. Decimal fractions would not have to be used. Since the tolerances on building components and building practice would rarely be less than one millimetre, the millimetre became the sub-unit most appropriate to this industry.

While dual scale tapes showing both inches and centimetres are sold, these are mainly imported low-cost items since it would be a restriction of trade to not allow their importation. Tape measures sold in the UK often have dual scales for metric and imperial units. Like the American tape measures described above, they also have markings every 16 in Tape measures sold in Canada often have dual scales for metric and imperial units.

All tapes in imperial units have markings every 16 in Home construction in canada is largely, if not entirely, in imperial measure. Tapes are used in surveying for measuring Horizontal, vertical or slope distances.

Tapes are issued in various lengths and widths and graduated in variety of ways. The accuracy of a tape measure is dependent on the ends of the tape and the markings printed onto the tape. The accuracy for the end of a retractable tape measure is dependent on the hook's sliding mechanism and thickness.

The European Commission EC has standardised a non-compulsory classification system for certifying tape measure accuracy, with certified tapes falling into one of three classes of accuracy: Classes I, II, and III. If a tape measure has been certified then the class rating is printed onto the tape alongside other symbols including the nominal length of the tape, the year of manufacture, the country of manufacture, and the name of the manufacturer.

From Wikipedia, the free encyclopedia. Flexible ruler used to measure size or distance.

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