US3845323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring device for monitoring the supply of filaments and/or tapes to electric cable stranding machines
Assignee: Pirelli and C SpA
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Filing: 1973-06-07
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Granted: 1974-10-29
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Expires: 1993-06-07
Abstract
Abstract A device for monitoring the supply of wire, thread, tape and the like to an electric cable manufacturing machine, e.g., a stranding machine. The device comprises a commutator driven by a part which is rotated by the material being fed, e.g., the supply drum or reel, a pair of brushes connected in a direct current circuit and connected and disconnected to and from each other by the commutator, a circuit for rectifying the alternating current component of the current in the direct current circuit and a relay controlled by the rectified component. The relay is used to control an alarm, and may also be used to control the stopping of the machine, when the commutator stops rotating by reason of interruption of the feed of the material.
Inventors
- 👤 A Bellasio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:27
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/484; B; B65; B65H; B65H63/00; B65H63/02; G01P13/00; H; H01; H01B; H01B13/00; H01B13/0036
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
In electric cable manufacturing apparatus comprising a source of a filament for said cable and means for physically processing said filament in the manufacture of said cable and to which said filament is fed from said source, the combination therewith of a monitoring device for monitoring the feed of the filament from the source thereof to said means, said device comprising generating means controlled in accordance with the movement of said filament for generating a pulsating direct current dependent upon the movement of said filament and having a direct current component and an alternating current component, signal means responsive to said alternating current component and transfer means which transfers alternating current but blocks direct current connected to said generating means and said signal means for transmitting the alternating current component of said pulsating current from said generating means to said signal means without transmitting the direct current component of said current.
Claim 2
Dependent Claim
151 words
In electric cable manufacturing apparatus comprising a source of a filament for said cable and means for physically processing said filament in the manufacture of said cable and to which said filament is fed from said source, the combination therewith of a monitoring device for monitoring the feed of the filament from the source thereof to said means, said device comprising generating means controlled in accordance with the movement of said filament for generating a pulsating direct current dependent upon the movement of said filament and having a direct current component and an alternating current component, signal means responsive to said alternating current component and transfer means which transfers alternating current but blocks direct current connected to said generating means and said signal means for transmitting the alternating current component of said pulsating current from said generating means to said signal means without transmitting the direct current component of said current.
Claim 3
Dependent Claim
44 words
A monitoring device as set forth in claim 1, wherein said source is a rotatable member on which said filament is wound, said member being rotatable by said filament as it is fed, and wherein said generating means is driven by said rotatable member.
Claim 4
Dependent Claim
36 words
A monitoring device as set forth in claim 2, wherein said generating means comprises a commutator having a plurality of conductive segments and a pair of brushes connected by said segments as said commutator is rotated.
Claim 5
Dependent Claim
40 words
A monitoring device as set forth in claim 3, wherein said transfer means comprises a transformer having primary and secondary windings, said primary winding being connected to said generating means and said secondary winding being connected to said signal means.
Claim 6
Dependent Claim
27 words
A monitoring device as set forth in claim 3, wherein said transfer means comprises a capacitor connected in series between said generating means and said signal means.
Claim 7
Dependent Claim
31 words
A monitoring device as set forth in claim 1, wherein said signal means comprises an amplifier connected to said transfer means and a relay connected to and controlled by said amplifier.
Claim 8
Dependent Claim
30 words
A monitoring device as set forth in claim 6, wherein said signal means comprises an alarm connected to said relay and operable thereby in the absence of said alternating component.
Claim 9
Dependent Claim
51 words
A monitoring device as set forth in claim 6, further comprising a control circuit connected to said processing means for starting and stopping said processing means and wherein said control circuit is connected to and controlled by said relay for stopping said processing means in the absence of said alternating component.
Claim 10
Dependent Claim
123 words
A monitoring device as set forth in claim 1, wherein said filament engages a rotatable member which is rotatable by said filament as it is fed and wherein said generating means comprises a commutator having a plurality of conductive segments connected to and rotatable with said rotatable member, a pair of brushes connectible by said segments as said commutator is rotated and a source of direct current connected in series with said brushes, wherein said transfer means comprises an alternating current transfer circuit connected in series with said source of direct current and said brushes and wherein said signal means comprises rectifying means for rectifying said alternating current component and a relay connected to and responsive to the output of said rectifying means.
Claim 11
Dependent Claim
31 words
A monitoring device as set forth in claim 9, wherein said signal means further comprises an alarm connected to and operable by said relay in the absence of said alternating component.
Claim 12
Dependent Claim
45 words
A monitoring device as set forth in claim 9, further comprising a control circuit connected to said processing means for stopping said processing means and means interconnecting said control circuit and said relay for stopping said processing means in the absence of said alternating component.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |