Manual indicator with a needle that can be positioned on a scale is designed to fit over the neck of a gas bottle so that the amount of gas remaining in the bottle can be clearly indicated

摘要

Manually adjustable indicator (1) for displaying the filling state of a closable container, especially a gas bottle, whereby a part (2) that can be mounted on the bottle has a mechanism (8, 9) for guiding an indicator needle (10) around a scale (30) or similar.