Importance

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Abstract

A shutter (111) and shutter control mechanism are disclosed, for use in a banknote dispensing machine for closing the outlet aperture. The shutter (111) fixed to a pivoted arm (112) is normally locked by a latch (109) which lodges in a V-shaped notch formed in the end of the shutter arm (112). When a stack of banknotes approaches the outlet aperture, a control circuit (not shown) energises an actuating solenoid (106) which pulls a drive tooth (103) through a linkage (105) against the action of a return spring (107). The drive tooth (103) rotates clockwise until it rests in the position shown in FIG. 3. During its rotation to this position, a drive pin (108) on the drive tooth (103) pushes the latch (109) away from the shutter arm, thus releasing the shutter. Meanwhile a snail cam, (104) rotates anti-clockwise, and eventually engages a cam follower surface on a lower corner of the drive tooth (103), the drive tooth being pivoted close to its center. Continued rotation of the snail cam (104) causes the drive tooth to rotate in a clockwise direction, the drive pin pushing down on the end of the shutter arm and raising the shutter. The stack of banknotes is presented at the outlet aperture, and the shutter abruptly falls under gravity to hold the stack. The drive tooth then automatically disengages, and the latch is returned (by spring 30) to lock the shutter once the stack has been withdrawn.

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First Claim