| 摘要 |
<p>The scales move in accordance with weight. The device has a light source (9) whose radiation passes through the scales, and an objective for the scale image projection on a frosted glass in the housing. The objective is movable parallel to the scale surface and at a right angle to its optical axis, and fixed in a position corresponding to the selected unit price, so that the corresponding scale is visible on the frosted glass. The objective can in addition move along its optical axis, so that the objective (12) distance from the scale (1) is automatically fixed when the objective is set to a certain price scale.</p> |
