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The product was named Otis King's Patent Calculator, and was manufactured and sold by Carbic Ltd. in London from about 1922 to about 1972. With a log-scale decade length of 66 inches, the Otis King calculator should be about a full digit more accurate than a 6-inch pocket slide rule. But due to inaccuracies in tic-mark placement, some portions ...
Patent model of Eli Whitney’s cotton gin. A patent model was a handmade miniature model no larger than 12" by 12" by 12" (approximately 30 cm by 30 cm by 30 cm) that showed how an invention works. It was one of the most interesting early features of the United States patent system. [1]
The Remington Model 8 is a semi-automatic rifle designed by John Browning and produced by Remington Arms, [4] introduced as the Remington Autoloading Rifle in 1905, though the name was changed to the Remington Model 8 in 1911.
The Bliemeister method, named after inventor Louis W. Bliemeister of Los Angeles, California, (U.S. patent 2,978,742, dated April 11, 1961) is a process for making lead shot in small sizes from about #7 to about #9. In this process, molten lead is dripped from small orifices and dropped approximately 1 inch (2.5 cm) into a hot liquid, where it ...
6 mm – approximate width of a pencil; 7 mm – length of a Paedophryne amauensis, the smallest-known vertebrate [108] 7.1 mm – length of a sunflower seed; 7.62×51mm NATO – common military ammunition size [109] 8 mm – width of old-format home movie film; 8 mm – length of a Paedocypris progenetica, the smallest-known fish [110]
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Some clinics do not have 6-metre eye lanes available, and either a half-size chart subtending the same angles at 3 metres (9.8 ft), or a reversed chart projected and viewed by a mirror is used to achieve the correct sized letters. In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres.
The Jaeger chart is a card on which paragraphs of text are printed, with the text sizes increasing from 0.37 mm to 2.5 mm. [15] This card is to be held by a patient at a fixed distance from the eye dependent on the J size being read. The smallest print that the patient can read determines their near visual acuity.