Certified Ophthalmic Technician (COT). The Certified Ophthalmic Technician is the second core designation level confirming knowledge in 19 specific content areas specifically designed to test the certified ophthalmic assistant or program graduate who intends to advance their career in the eye care field.
The original spinning jenny used eight spindles instead of the one found on the spinning wheel. A single wheel on the spinning jenny controlled eight spindles, which created a weave using eight threads spun from a corresponding set of rovings. Later models had up to one-hundred and twenty spindles.
The advertising department used the Roundel and BMW heritage in an attempt to increase sales of the new radial motors. The idea of the spinning propellers was given greater credence in an article by Wilhelm Farrenkopf in a BMW journal of 1942. This also featured an image of an aircraft with a spinning Roundel.