Abstract: A rotational transmission reducer having plane waving gear mechanism comprises at least a reducer unit of an input member, an output member, and a plane flexible member which lays between the input member and the output member. The reducer unit may be coaxially piled to be a multistage reducer. A typical example is a transmission of a clock or a watch, which can simplify a conventional mechanism and lower the manufacturing cost. The reducer unit functions by some salient portions on the input member pushing the flexible member, to engage a part of a ring gear furnished on the flexible member with another ring gear furnished on the output member. The output member is rotated by differential pitches of aforesaid two ring gears. For a clock or watch transmission, the ring gear on the output member is an independent member joined frictionally with a substance of the output member so that they can be slid relatively for time adjustment.

Abstract: A suppport frame comprising a primary and secondary frame. The primary frame is U-shaped, having a hole on each end and a disc-like central section with a plurality of pits and a cylindrical projection. The secondary frame has a seat with a circular recess on one end and an engaging device on the other end. The motor assembly is disposed between the tips of the U-shaped frame by screws. The base of the fan, together with the control panel, engages with the engaging device by screws. The seat of the secondary frame with its circular recess receives the cylindrical projection of the primary frame and they are coupled together with a screw. Two sets of a spring and ball are placed respectively within two apertures on the seat of the secondary frame to coincide with the pits on the disc. Thus, the primary frame may be adjusted relative to the secondary frame.