US3417289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed sensing switch for rotary drums and the like
Assignee: Ametek Inc
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Filing: 1966-08-26
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Granted: 1968-12-17
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Expires: 1986-08-26
Abstract
No abstract record available.
Inventors
- 👤 James N Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
G; G01; G01P; G01P13/00; D; D06; D06F; D06F34/00; D06F34/14; D06F34/20; D06F37/00; D06F37/30; D06F37/302; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/103; G01P3/00; G01P3/42; G01P3/44; G01P3/46; G01P3/48; G01P3/481; G01P3/484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A SPEED SENSING DEVICE FOR A MACHINE HAVING A MOVING MEMBER, THE COMBINATION OF A MAGNETIC MEANS CARRIED BY SAID MOVING MEMBER FOR MOVEMENT THEREWITH, A REED-TYPE SWITCH HAVING A PAIR OF NORMALLY OPEN CONTACTS MOUNTED ON A STATIONARY PART OF SAID MACHINE IN A POSITION TO BE SWEPT BY SAID MAGNETIC MEANS, A CAPACITOR, CHARGING CIRCUIT MEANS CONNECTED THROUGH THE NORMALLY OPEN CONTACTS OF SAID REED-TYPE SWITCH FOR CHARGING SAID CAPACITOR AT A PREDETERMINED TIME CONSTANT UPON CLOSING OF SAID CONTACTS, CIRCUIT MEANS FOR DISCHARGING SAID CAPACITOR WHEN SAID CONTACTS ARE OPEN, A SECOND DISCHARGE CIRCUIT
Claim 2
Dependent Claim
98 words
IN A SPEED SENSING DEVICE FOR A MACHINE HAVING A MOVING MEMBER, THE COMBINATION OF A MAGNETIC MEANS CARRIED BY SAID MOVING MEMBER FOR MOVEMENT THEREWITH, A REED-TYPE SWITCH HAVING A PAIR OF NORMALLY OPEN CONTACTS MOUNTED ON A STATIONARY PART OF SAID MACHINE IN A POSITION TO BE SWEPT BY SAID MAGNETIC MEANS, A CAPACITOR, CHARGING CIRCUIT MEANS CONNECTED THROUGH THE NORMALLY OPEN CONTACTS OF SAID REED-TYPE SWITCH FOR CHARGING SAID CAPACITOR AT A PREDETERMINED TIME CONSTANT UPON CLOSING OF SAID CONTACTS, CIRCUIT MEANS FOR DISCHARGING SAID CAPACITOR WHEN SAID CONTACTS ARE OPEN, A SECOND DISCHARGE CIRCUIT
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |