Band tightening system

A tightening apparatus, comprising:

• a housing;
• a plurality of pieces coupled together and to the housing;
• a central sun gear having a center axis and a plurality of teeth, wherein the sun gear is enclosed in the housing;
• two planetary gears coupled to the sun gear, wherein the planetary gears have a plurality of teeth and are enclosed in the housing;
• a bezel having a plurality of teeth on an inner diameter of the bezel, wherein the teeth of the bezel are interlocked with the teeth of the two planetary gears, wherein the bezel is coupled to a perpendicular cog,
• and wherein the cog is coupled to one of the planetary gears;
• a spool coupled to the sun gear, wherein the spool is rotatable about an axis that is collinear with the center axis of the sun gear;
• and
• one or more wires coupled to the spool and at least a second piece of the plurality of pieces, wherein the one or more wires are configured to wind around the spool when the spool rotates, wherein the second piece is movable from a first position spaced a first distance from a first piece of the plurality of pieces to a second position spaced a second distance from the first piece, and wherein the second distance is less than the first distance.

A tightening wristwatch, comprising:

• a housing having a plurality of pieces coupled together;
• a ratchet having a center axis and coupled to at least a first piece of the plurality of pieces and a last piece of the plurality of pieces, wherein the ratchet has a plurality of teeth;
• a spool coupled to the ratchet, wherein the spool is rotatable about an axis that is collinear with the center axis;
• a cog perpendicular to the ratchet, wherein the teeth of the cog and the teeth of the ratchet are interlocked;
• a bezel coupled to the cog and disposed perpendicular to the cog and parallel with the ratchet, wherein the cog and bezel are interlocked;
• a watch coupled to the bezel, wherein the watch is coupled to the plurality of pieces to form a closed loop;
• and
• one or more wires coupled to the spool and at least a second piece of the plurality of pieces, wherein the one or more wires are configured to wind around the spool when the spool rotates, wherein the second piece is movable from a first position spaced a first distance from the first piece to a second position spaced a second distance from the first piece, wherein the second distance is less than the first distance, and wherein the diameter of the loop is reduced.