A fine feldspathic earthenware including a body and a glaze layer covering surfaces of the body. A type-B winding represented by a diamond of broken lines is connected to commutator segments such that its one end is connected to a commutator segment located radially opposite to a usual adjacent commutator segment. The rigging is received in a rigging cavity of a rigging cover and the rigging cover is extendable in response to an extension of the rigging from the hoist body and retractable in response to a retraction of the rigging. A fourth-phase clock signal is generated one clock cycle of the first input clock signal after generating the third-phase clock signal in response to the second input clock signal.