PT75791A
Expired / Lapsed
PT
⏱️ 0.0 years remaining
Method and device for measuring hairiness of textile yarns
Assignee: Inst Universitario Da Beira In
•
Filing: 1982-11-03
•
Granted: —
•
Expires: 2002-11-03
Abstract
Abstract Meter comprises a positive strip with means for locating the fibre, a photodetector emitting e.g. a 0-20 mV signal, an electromechanical system adjustable velocity, and a microprocessor. To increase accuracy, the diffraction image analysis is based on a Fourier transform produced in laser beams. Pref. a histogram is plotted of the mean square deviation on a metre for metre basis, with a programming range of 1-265 seconds, digital display and printing.
Inventors
- 👤 Fernando Antonio De Rodrigues
- 👤 Manuel Jose Dos Santos Silva
Bibliographic Details
Application Number
—
Jurisdiction
PT
Data Source
google_patents
Last Synchronized
2026-11-09 15:21
CPC Classifications
—
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.