The chimney had an inverted conical shape and the wide opening was covered by wire mesh, to serve as a spark arrester.
12.
All spark arresters meeting the requirements of 36 CFR 261.52 must be certified and listed in the USDA Forest Service Spark Arrester Guide.
13.
Another modification by Tilney was an extended smokebox, to make room for a very efficient spark arrester which was constructed of wire mesh.
14.
All spark arresters meeting the requirements of 36 CFR 261.52 must be certified and listed in the USDA Forest Service Spark Arrester Guide.
15.
Officials also urged off-road riders to make sure they have effective spark arresters on their vehicles to guard against igniting the brush in recreational areas.
16.
Vehicles without properly functioning spark arresters have been suspected of starting numerous wildfires, including the devastating track fire near Raton, New Mexico in June 2011.
17.
Ryan Unger, 18, was cited last month for operating an off-road vehicle without a spark arrester, which officials believe started the August blaze in central Washington.
18.
It appears to be identical to half a outside Stephenson valve gear and was a coal burner, fitted with a balloon chimney to accommodate a spark arrester.
19.
Spark arresters : The Dodgers aren't getting much life at the top of their batting order, and interim manager Bill Russell has just about depleted his options.
20.
Manufacturers pursuing spark arrester qualification in the United States should consult the USDA Forest Service's " Manufacturer's Submission Procedure " for both general purpose and small engine spark arresters.
