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The tape will pulled less than its standard length when a tension less than the standard tension is applied, making the tape too long. A tape stretches in an elastic manner until it reaches its elastic limit, when it will deform permanently and ruin the tape. The correction due to tension is given by:
Early Lufkin logo. The company was founded by Edward Taylor Lufkin, an American Civil War veteran of the Sixtieth Regiment Ohio Volunteer Infantry [1] in Cleveland, Ohio, 1869 [2] and was originally named E.T. Lufkin Board and Log Rule Manufacturing Company.
Correction tape is sold in short spools for hand use, or as long rolls to be used in typewriters, which apply sudden pressure when a key is struck, and can therefore apply the masking material in exactly the same shape and position as the erroneous character. Some versions of correction tape are sold in separate dispensers that are used to roll ...
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Such misalignment would be intolerable in a calculator's dials, so each of the Marchant's dials had a constant-lead ("snail") cam attached. Omitting important details, this cam determined the amount of movement needed to realign the result dials. That correction was applied by a second spur-gear differential, again, one per dial.
On sites like eBay and LoveAntiques, collectible VHS tapes are valued at upwards of nearly $10,000 - depending on the rarity and condition of the tape, of course.
The pocket-sized Hewlett-Packard HP-35 scientific calculator was the first handheld device of its type, but it cost US$395 in 1972. This was justifiable for some engineering professionals, but too expensive for most students. Around 1974, lower-cost handheld electronic scientific calculators started to make slide rules largely obsolete.