US4364502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line sensor arrangement
Assignee: MILLIKEN RESEARCH Corp A CORP OF SC
•
Filing: 1980-06-23
•
Granted: 1982-12-21
•
Expires: 2000-06-23
Abstract
Abstract A rotating magnetic sensor which detects a ferrous line on a web of material and compares it with a reference registration line to either speed up or slow down the speed of the section of web material on which the ferrous line is located. The sensor employs a pole-piece, a coil, a permanent magnet and two signal wires.
Inventors
- 👤 Zane Frentress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:59
CPC Classifications
D; D06; D06H; D06H3/00; D06H3/12; D06H3/125; D06H3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A magnetic sensor to detect a ferrous mark on a moving web of material comprising: a substantially cylindrical housing having a central axis, a sensor mounted in said housing, said sensor having a permanent magnet mounted therein, a pole piece mounted in said sensor adjacent said permanent magnet having its centerline offset from the centerline of said cylindrical housing, a coil in said pole piece adjacent one end of said housing and a plurality of wires connected to and projecting from said sensor to provide a connection means to transmit a voltage generated when said sensor is rotated around a ferrous material.
Claim 2
Dependent Claim
102 words
A magnetic sensor to detect a ferrous mark on a moving web of material comprising: a substantially cylindrical housing having a central axis, a sensor mounted in said housing, said sensor having a permanent magnet mounted therein, a pole piece mounted in said sensor adjacent said permanent magnet having its centerline offset from the centerline of said cylindrical housing, a coil in said pole piece adjacent one end of said housing and a plurality of wires connected to and projecting from said sensor to provide a connection means to transmit a voltage generated when said sensor is rotated around a ferrous material.
References Cited (Backward Citations)
US2773120A
Cited
US2866012A
Cited
US3042756A
Cited
US3784072A
Cited
US3701464A
Cited
US4261498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |