Improvements in the Construction of Chimney Cowls and Ventilators.
Номер патента: GB190919008A
Опубликовано: 19-05-1910
Автор(ы): Frederick Howard, James WALKER
Принадлежит: Individual
Опубликовано: 19-05-1910
Автор(ы): Frederick Howard, James WALKER
Принадлежит: Individual
Реферат: 19,008. Walker, J., and Howard, F. Aug. 18. Chimney and ventilating-shaft tops. - Centrally - pivoted plates C are independently mounted on pivots' in slots b<1> with their lower parts swinging in boxes B having their sides sloping outwards and. downwards. The plates are weighted at c<1> and normally hang vertically, being actuated by wind to close against the wall a'. In a modification the lower walls of the boxes slope downwards away from the top, and have draining-holes near the outer edge.
Apparatus for the draft of chimneys, gas evacuation ducts, aeration and ventilation, referred to as
Номер патента: FR690480A. Автор: . Владелец: EXPL DES BREVETS BOUTEILLE LE. Дата публикации: 1930-09-20.