Abstract: A disconnect arrangement is useful for disconnecting high speed generators, such as those utilized in aircraft electrical systems, from a driving source, such as an aircraft engine. The disconnect coupling includes splined members at either end of a stub shaft which are coupled respectively to the generator and the engine. A carbide knife-edged plate is pivotable about one end of the plate and, in the normal or deactivated position, an extension of a solenoid armature prevents the knife-edge from contacting the stub shaft. When energized, the solenoid armature is retracted releasing its engagement with the knife-edged plate, and a spring forces the knife-edge to engage the stub shaft at a relatively thin-walled portion thereof. Friction generated causes localized heating and the relatively thin wall of the stub shaft becomes plastic, the stub shaft then separating into two portions effecting disconnection of the generator from the engine.

Abstract: A lubrication system for the spline connection and generator bearing of a high speed aircraft generator which utilizes a split ring seal and quad o-ring is disclosed. The split ring seal retards lubricant flow so that there is an accumulation in the area of the splined connection which prevents wear of the splines. The retardation also forces oil to a bearing lubrication hole.