US3341746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control method and apparatus
Assignee: Dow Chemical Co
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Filing: 1964-04-21
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Granted: 1967-09-12
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Expires: 1984-04-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred V Baker
- 👤 Hart Porter
- 👤 Jackson Lake
- 👤 Bernard F Poetker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/08; G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF SETTING TO PREDETERMINED CONTROL LEVELS INDIVIDUAL CONTROL DEVICES OF A PLURALITY OF MAGNETICALLY ACTUATED CONTROL DEVICES WHICH EACH HAVE A PERMANENTLY MAGNETIZABLE ELEMENT INCLUDING AN ELECTROMAGNETIC COIL WHICH IS MAGNETICALLY COUPLED TO A PIVOTED MOVABLE BEAM ELEMENT WHOSE MOVEMENT IS UTILIZED IN ACHIEVING THE CONTROL FUNCTION OF THE DEVICE, COMPRISING SEQUENTIALLY DETERMINING FOR EACH DEVICE BY MEANS OF EXTERNAL CIRCUITRY THE DEGREE OF MAGNETIZATION REQUIRED FOR A REQUISITE CONTROL FUNCTION, PULSING THE ELECTROMAGNETIC COIL OF EACH PERMANENTLY MAGNETIZABLE ELEMENT BY MEANS OF A SINGLE ELETRICAL PULSE TO A MAXIMUM DEGREE OF MAGNETIZATION IN ONE POLARITY AND THEN PULSING SAID ELECTROMAGNETIC COIL BY MEANS OF A SINGLE ELECTRICAL PULSE IN AN OPPOSITE POLARITY TO A PREDETERMINED LEVEL WHICH DRIVES EACH SAID MAGNETIZA-
Claim 2
Independent Claim
124 words
A METHOD OF SETTING TO PREDETERMINED CONTROL LEVELS INDIVIDUAL CONTROL DEVICES OF A PLURALITY OF MAGNETICALLY ACTUATED CONTROL DEVICES WHICH EACH HAVE A PERMANENTLY MAGNETIZABLE ELEMENT INCLUDING AN ELECTROMAGNETIC COIL WHICH IS MAGNETICALLY COUPLED TO A PIVOTED MOVABLE BEAM ELEMENT WHOSE MOVEMENT IS UTILIZED IN ACHIEVING THE CONTROL FUNCTION OF THE DEVICE, COMPRISING SEQUENTIALLY DETERMINING FOR EACH DEVICE BY MEANS OF EXTERNAL CIRCUITRY THE DEGREE OF MAGNETIZATION REQUIRED FOR A REQUISITE CONTROL FUNCTION, PULSING THE ELECTROMAGNETIC COIL OF EACH PERMANENTLY MAGNETIZABLE ELEMENT BY MEANS OF A SINGLE ELETRICAL PULSE TO A MAXIMUM DEGREE OF MAGNETIZATION IN ONE POLARITY AND THEN PULSING SAID ELECTROMAGNETIC COIL BY MEANS OF A SINGLE ELECTRICAL PULSE IN AN OPPOSITE POLARITY TO A PREDETERMINED LEVEL WHICH DRIVES EACH SAID MAGNETIZA-
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |