Improvements in Needles for Talking Machines.
Номер патента: GB190720761A
Опубликовано: 05-12-1907
Автор(ы): Charles Lee Meyers
Принадлежит: Individual
Опубликовано: 05-12-1907
Автор(ы): Charles Lee Meyers
Принадлежит: Individual
Реферат: 20,761. Meyers, C. L. Sept. 18. Gramophones.-Gramophone needles h a v e a cylindrical body C, 45 in. in length, and a concavely tapered point C' 235 in. in length. Both the point face C<3> and body face C<2> are at rightangles to the length of the needle and are À002 in. and À065 in. respectively in diameter. The maximum concavity of the curve is À004 in. The needle is made of highly carbonized steel of tough fibre.
Method and plant for air quality improvement in restricted space
Номер патента: RU2338961C2. Автор: Лауфей ЛИН. Владелец: Лауфей ЛИН. Дата публикации: 2008-11-20.