Improvements in the Ventilation of Houses, Hotels, Hospitals and other Buildings
Реферат: 25,441. Bell, R. Nov. 23. Air, filtering; window appliances.-A frame A is enveloped with cottonwool or other porous material B, retained in a casing C of wire netting. This filter screen is placed in a suitable aperture, and the incoming air may be warmed by hot-water pipes or other apparatus placed near the inner side of the screen. The device may be used in hotels, hospitals, &c,
Improvements in or relating to low temperature equipment for storage of non-ferrous metal rivets, pressings and other parts made of light alloys
Номер патента: GB538153A. Автор: . Владелец: Individual. Дата публикации: 1941-07-22.