US3171071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seam follower
Assignee: Individual
•
Filing: 1960-07-15
•
Granted: 1965-02-23
•
Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Robert L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:16
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/20; B23Q15/22; B23Q15/24; B23K; B23K9/00; B23K9/12; B23K9/127; B23K9/1272; B23K9/1276; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A SEAM FOLLOWER COMPRISING FIRST AND SECOND OSCILLATORS, EACH SAID OSCILLATOR COMPRISING AMPLIFYING MEANS, A FIRST RESONANT CIRCUIT CONNECTED TO THE INPUT OF SAID AMPLIFYING MEANS, A SECOND RESONANT CIRCUIT CONNECTED TO THE OUTPUT OF SAID AMPLIFYING MEANS, A FIRST COIL FORMING AN INDUCTIVE ELEMENT OF SAID FIRST RESONANT CIRCUIT AND A SECOND COIL FORMING AN INDUCTIVE ELEMENT OF SAID SECOND RESONANT CIRCUIT, SAID FIRST AND SECOND COILS BEING INDUCTIVELY COUPLED TO EACH OTHER, MOUNTING MEANS FOR SAID COILS OF SAID FIRST AND SECOND OSCILLATORS, SAID SECOND COILS OF SAID FIRST AND SECOND OSCILLATORS BEING SUBSTANTIALLY IDENTICAL AND POSITIONED BY SAID MOUNTING MEANS WITH THEIR ELECTRICAL AXES SPACED, SAID SECOND COILS DISPOSED ADJACENT A SEAM FOR SENSING CHANGES IN PERMEABILITY OF THE SEAM WHEREBY THE OUTPUTS OF SAID OSCILLATORS VARY WITH CHANGES IN THE PERMEABILITY SENSED, MEANS RESPONSIVE TO THE OUTPUTS OF SAID AMPLIFYING MEANS OF SAID FIRST AND SECOND OSCILLATORS FOR POSITIONING SAID MOUNTING MEANS TO A POSITION CORRESPONDING TO EQUAL OUTPUT OF SAID OSCILLATORS, EACH SAID SECOND RESONANT CIRCUIT BEING TUNED TO NEAR RESONANCE OF ITS ASSOCIATED FIRST RESONANT CIRCUIT.
Claim 2
Dependent Claim
182 words
A SEAM FOLLOWER COMPRISING FIRST AND SECOND OSCILLATORS, EACH SAID OSCILLATOR COMPRISING AMPLIFYING MEANS, A FIRST RESONANT CIRCUIT CONNECTED TO THE INPUT OF SAID AMPLIFYING MEANS, A SECOND RESONANT CIRCUIT CONNECTED TO THE OUTPUT OF SAID AMPLIFYING MEANS, A FIRST COIL FORMING AN INDUCTIVE ELEMENT OF SAID FIRST RESONANT CIRCUIT AND A SECOND COIL FORMING AN INDUCTIVE ELEMENT OF SAID SECOND RESONANT CIRCUIT, SAID FIRST AND SECOND COILS BEING INDUCTIVELY COUPLED TO EACH OTHER, MOUNTING MEANS FOR SAID COILS OF SAID FIRST AND SECOND OSCILLATORS, SAID SECOND COILS OF SAID FIRST AND SECOND OSCILLATORS BEING SUBSTANTIALLY IDENTICAL AND POSITIONED BY SAID MOUNTING MEANS WITH THEIR ELECTRICAL AXES SPACED, SAID SECOND COILS DISPOSED ADJACENT A SEAM FOR SENSING CHANGES IN PERMEABILITY OF THE SEAM WHEREBY THE OUTPUTS OF SAID OSCILLATORS VARY WITH CHANGES IN THE PERMEABILITY SENSED, MEANS RESPONSIVE TO THE OUTPUTS OF SAID AMPLIFYING MEANS OF SAID FIRST AND SECOND OSCILLATORS FOR POSITIONING SAID MOUNTING MEANS TO A POSITION CORRESPONDING TO EQUAL OUTPUT OF SAID OSCILLATORS, EACH SAID SECOND RESONANT CIRCUIT BEING TUNED TO NEAR RESONANCE OF ITS ASSOCIATED FIRST RESONANT CIRCUIT.
References Cited (Backward Citations)
GB349496A
Cited
US2192978A
Cited
US2642530A
Cited
US2787710A
Cited
US2835858A
Cited
US2871432A
Cited
US2937327A
Cited
US2971079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |