#$%^&*AU2015258185B220171214.pdf#####ABSTRACT A counter comprises a first ring member having first indicia and a second ring member having second indicia. Each of said first and second ring members are 5 rotatable in increments about a common axis with one or both of said first and second indicia indicating a count. A drive mechanism is provided for rotating said first ring member and for rotating the second ring member after one or more predetermined degrees of rotation of the first ring member. The drive mechanism comprises a pawland-teeth mechanism which comprises a first and second pawl engageable with a 10 plurality of teeth. Each of the first and second pawls comprises a driving engagement face for engaging in a driving engagement with one of said plurality of teeth, and a sliding engagement face for sliding over one of said plurality of teeth. Each of said first and second pawls is arranged such that: said first pawl engages in a driving engagement with one of said plurality of teeth during a count stroke of said teeth； said 15 second pawl engages in a driving engagement with one of said plurality of teeth during a return stroke of said teeth； said second pawl rides over one of said plurality of teeth during said count stroke； and said first pawl rides over one of said plurality of teeth during said return stroke.
