Chart recorder
US4420762A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1982 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Feb 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A chart recorder useful in a marine depth sounder or in other applications. Chart paper for the recorder is loaded into a paper cartridge, which is insertable in the recorder. The paper cartridge supports a roll of chart paper, a takeup spindle for winding the paper, and a viewing surface across which the paper travels after data marks are recorded on the paper. An internally-driven roller within the recorder frictionally engages the takeup spindle when the cartridge is in place, so as to move the chart paper at a selected linear speed. The drive roll is operated by an electric motor and a multiple-stage compound reduction gear arrangement, all entirely contained within the drive roller. The paper marking stylus of the recorder makes full-time contact with a stylus engaging surface throughout each revolution of the stylus drive belt. An inductive sensing device is located between sides of the drive belt, and senses a magnet carried on the outside of the belt. The chart recorder includes a door which can be hinged downwardly for access to the paper cartridge, or can be entirely removed from the recorder for that purpose. A lighted range indicating scale is attached to the door, and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.