Identification system
US4720907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Nov 26, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T483/134
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A system for marking and identifying objects, particularly work implements such as tools and work piece holders required in manufacturing processes, which has modules (4) with electronically readable markings, which modules (4) are to be arranged on the objects (1) to be marked, as well as an evaluating device having at least one pick-up capable of reading the markings. Each module contains at least one oscillating circuit (5, 6, 7) to produce a characteristic resonant frequency or resonant frequency combination. The number of different resonant frequencies or resonant frequency combinations provided corresponds to the number of different elements in the selected characterizing code, and the resonant frequency or resonant frequency combination of each module (4) is selected according to one of these frequencies or frequency combinations. The modules (4), which are to be fixed to the object (1), are selected and arranged according to the elements necessary for the representation of the marking of the object (1) in the selected code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.