Improvements in coal screening devices for domestic coal storages

摘要

823,692. Rakes. JEALOUS, E. M. E. Oct. 29, 1956 [July 28, 1955], No. 21781/55. Class 6(2). [Also in Group II] A scraper or rake has a handle 17 and a blade 16 with a prong or stud 18 to prod and dislodge slack coal from blocked apertures in a coal screen.