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Standardized construction of mine ventilating doors
Careful construction and maintenance will minimize leakage of air through stoppings and overcasts, but some leakage is nearly always present at doors; one faulty door which permits excessive escape of air may add so greatly to ventilating expense that initial saving in construction of door is false economy; review of mining conditions at South Wilkes-Barre Colliery; fans; ventilating system; construction of doors; sketch showing design details.
Standardized construction of mine ventilating doors
Careful construction and maintenance will minimize leakage of air through stoppings and overcasts, but some leakage is nearly always present at doors; one faulty door which permits excessive escape of air may add so greatly to ventilating expense that initial saving in construction of door is false economy; review of mining conditions at South Wilkes-Barre Colliery; fans; ventilating system; construction of doors; sketch showing design details.
Standardized construction of mine ventilating doors
U S Bur Mines -- Information Cir
Hartley, J.C. (author) / Moschetti, A.C. (author)
1944
4 pages
Supp plate
Report
English
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AUTO VENTILATING APPARATUS FOR SLIDING WINDOWS AND DOORS
| European Patent Office | 2018