Improvements in and relating to Black Boards and the like.
Номер патента: GB190114842A
Опубликовано: 29-05-1902
Автор(ы): Colin Sims, Wright Schofield
Принадлежит: Individual
Опубликовано: 29-05-1902
Автор(ы): Colin Sims, Wright Schofield
Принадлежит: Individual
Реферат: 14,842. Schofield, W., and Sims, C. July 22. Slates and blackboards; maps and charts.-The blackboard C is pivoted to rotate on a central horizontal axis in the frame B, which slides in grooves in the standards A, and is provided with balance weights H. Maps, charts, &c. are hung from the pivoted bar N. The board C is held in an inclined position by a pin K and perforated brackets D', E<1>, or by any suitable means. The Provisional Specification also states that the edge of the frame B stands beyond the board C to facilitate the use of set-squares &c.
Improvements relating to tool and work rests for lathes and the like
Номер патента: GB477930A. Автор: . Владелец: Warner and Swasey Co. Дата публикации: 1938-01-10.