Projection scale with price indicator
US3991839A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Oct 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G23/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A price-indicating projection weighing scale provided with a plurality of projectable graduation scales on a support member having several price scales each corresponding to a certain base price, the support member being movable in dependence of weight, and an optical projection system comprising an objective which is movable and indexable opposite a graduation scale in dependence of the pre-selected base price for projection of a section of the price graduation indicia on a focusing screen. The objective is affixed to a movable support which is movable and positionable via an adjustment unit, operated from the outside, which is set in accordance with a selected base price of the merchandise to be weighed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.