Detecting device for visual observation of a moving fabric
Abstract
Abstract FOR USE IN FABRIC STRAIGHTENING APPARATUS INCORPORATING FABRIC STRAIGHTENING MEANS IS PROVIDED A DETECTOR DEVICE WHICH INCLUDES A GLASS GLATE WHICH IS SEMI-TRANSPARENT AND IS PLACED SUBSTANTIALLY PARALLEL AND CLOSE TO THE SURFACE OF A FABRIC TO BE INSPECTED, SUCH THAT A LIGHT SOURCE ARRANGED ON THE SIDE OF THE PLATE OPPOSITE THE FABRIC PROJECTS LIGHT RAYS THROUGH THE PLATE WHICH STRIKE THE FABRIC SURFACE, AS THE LATTER IS MOVED PAST THE PLATE, AT A PREDETERMINED ANGLE, SUCH THAT THE LIGHT RAYS ARE REFLECTED BY THE FABRIC ONTO THE GLASS AND THE INTENSITY OF THE RELECTED LIGHT RAYS CAN BE DETECTED BY FIRST AND SECOND DETECTOR HEADS ARRANGED ON THE SAME SIDE OF THE PLATE AS THE LIGHT SOURCE AND SYMMETRICALLY WITH RESPECT THERETO, THE DETECTOR HEADS BEING CONNECTED IN A BRIDGE CIRCUIT OPERABLE TO DETECT VARIATIONS IN THE INTENSITIES OF THE RELECTED LIGHT RAYS CAUSED BY IRREGULARITES IN THE LIGHT REFLECTING FABRIC TO CONTROL THE FABRIC STRAIGHTENING MEANS.
Inventors
- 👤 Henri Eicken
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |