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A tachometer that can indicate up to 7000 RPM (left) A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are ...
The Daniel Tachometer has been known in the railway industry since 1844. [1] ... Hasler Bern, mechanical tachograph (analog) of a rail vehicle.
It was hand-cranked, as were its predecessors. To aid the camera operator in cranking at the correct speed, the camera had a built in tachometer. The Parvo held up to 120 metres (390 ft) of film inside without the need for an external film magazine, yielding almost 6 minutes of film when cranked at the standard 16 frames per second silent film ...
Uhlhorn was an engineer, mechanic and inventor, who invented in 1817 the first mechanical tachometer. [1] [2] Between 1817 and 1830 he was inventor of the Presse Monétaire (level coin press known as Uhlhorn Press) which bears his name. [3]
The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand. It was affectionately known as the "pepper grinder" or "peppermill" due to its shape and means of operation; its superficial resemblance to a certain type of hand ...
Almost certainly the most colorful entry on our list, this eye-catching item is from Picky Bird Toys, a small New Braunfels, Texas business. With 273 five-star reviews from satisfied customers ...
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