An apparatus for manufacturing rubber-based spiral wound gaskets,in which a length of an elongate band passes through a bath for applying a coating of a rubber sealing material and then is wound in overlapping relation on a die to make a spiral wound gasket. The object reflects the detecting light and forms a reflected light. Each of the wavy annular members has a deformable portion 11 formed on a bent portion thereof not connected to the other wavy annular members in such a way that the deformable portion crosses the wavy annular member. Some examples described below assume a single-engine piston aircraft for ease of illustration. The electrical box assembly enables easy consolidation of all the various electrical and signal hookups for TV or home entertainment systems.