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Leo Gerstenzang (June 3, 1892 – January 31, 1961) was a Polish-American inventor who, in 1923, created the first contemporary cotton swab or Q-Tips. [citation needed] His product, which he named "Baby Gays," went on to become one of the most widely sold brand names. There are many anecdotes about how Gerstenzang came to create this invention ...
Rotary incremental encoder with shaft attached to its thru-bore opening Introduction to incremental encoders, from VideoWiki script Incremental Encoder. An incremental encoder is a linear or rotary electromechanical device that has two output signals, A and B, which issue pulses when the device is moved. [1]
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