| 摘要 |
<p>An apparatus for registering accelerations and retardations includes a basic structure (1, 2) on which an inertial mass is suspended in spring means and adapted to guide a writing means (C) coacting with a web (80) of registering medium, which is arranged for running substantially transverse the direction of movement of the writing means (C). The spring means includes two springs elements of which the first is adapted to bias the mass towards a normal position (60) with a force attaining a fraction of the force the mass maximally exercises on the first spring element under the action of gravity, while the second spring element is adapted for starting to exercise an elastic deformation resistance to the displacement of the mass when the latter is moved past a displacement position (61; 62) substantially situated at a distance from the normal position (60) corresponding to the length by which the mass maximally deforms the biassed first spring element under the action of gravity minus a length corresponding to the deformation of the first spring element, occuring at a loading thereof with a force of the same order of magnitude as said biasing force. </p> |
