Gear 1 is rigidly attached to (or integral with) ratchet wheel 2 and rotates about fixed axis A. Gear 1 meshes with gear 3 which, in turn, meshes with gear 5, rotating about fixed axis B. When gear 1 rotates counterclockwise, gear 5 rotates in the same direction and winds up spring 9. The gears are held in engagement by lever 4 which carries gear 3 and spring 6. Pawl 7 and spring 8 prevent wheel 2 and gears 1, 3 and 5 from rotating in the reverse direction. Gear 5 is returned to its initial position by spring 9 when lever 4 is turned counterclockwise to disengage gear 3 from gear 5.
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