US3633835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament break detector utilizing photoelectric means for detecting speed of supply spool
Assignee: Akzo NV
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Filing: 1970-07-10
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Granted: 1972-01-11
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Expires: 1990-07-10
Abstract
Abstract A break detector useful for the determination of breaks in the winding or rewinding of a filament is disclosed. The detector is characterized by the fact that none of its components contact the filament during revolutions of the supply or takeup means. Filament breaks are sensed by interruption of a light-sensitive device responsive to variations in the revolution rate of the filament letoff or spool feed means.
Inventors
- 👤 Raymond M Beers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:18
CPC Classifications
G; G01; G01P; G01P13/00; B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H63/032; B65H63/0321; B65H63/0324; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
Apparatus for detecting breaks in a filament winding operation comprising: a. a filament supply spool axially mounted on a shaft, b. a disc axially mounted on said shaft to rotate with said supply spool and having at least one aperture near the periphery of the disc, c. a light source positioned on one side of said disc, d. a light responsive element positioned on the other side of said disc in alignment with said aperture and said light source and responsive to changes in the light pulses received from said light source, e. a light-activated electrical circuit and alarm system coupled to said light responsive element, f. a filament takeup spool adapted to receive and wind the filament from said supply spool when the takeup spool is rotated, and g. means for rotating said filament takeup spool, said means being coupled to said light-activated electrical circuit (e).
Claim 2
Dependent Claim
147 words
Apparatus for detecting breaks in a filament winding operation comprising: a. a filament supply spool axially mounted on a shaft, b. a disc axially mounted on said shaft to rotate with said supply spool and having at least one aperture near the periphery of the disc, c. a light source positioned on one side of said disc, d. a light responsive element positioned on the other side of said disc in alignment with said aperture and said light source and responsive to changes in the light pulses received from said light source, e. a light-activated electrical circuit and alarm system coupled to said light responsive element, f. a filament takeup spool adapted to receive and wind the filament from said supply spool when the takeup spool is rotated, and g. means for rotating said filament takeup spool, said means being coupled to said light-activated electrical circuit (e).
Claim 3
Dependent Claim
78 words
Apparatus according to claim 1 wherein the light activated electrical circuit (e) includes: a. a capacitor which, when fully electrically charged, will discharge through a zener diode coupled to said capacitor, and b. a gate coupled to said zener diode which, when biased from current received from said zener diode, will energize an alarm device, said capacitor being also coupled to the light-responsive element (d) which periodically discharges said capacitor when light from source (c) strikes said element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |