A device to indicate the application of a non-rotative force, having particular utility in recording the dispensing of a push-down activated aerosol medication dispenser. A non-rotative force on an outer cover is translated into a rotation of an indicator wheel relative to the outer cover by a set of...http://www.google.com/patents/US5611444?utm_source=gb-gplus-sharePatent US5611444 - Indicator device responsive to axial force
