US3176196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electric relay
Assignee: Machinery Electrification Inc
•
Filing: 1961-08-09
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Granted: 1965-03-30
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Francis P Dunigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:26
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/22; H01H47/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PHOTO-ELECTRIC RELAY FOR USE WITH A SOURCE OF ALTERNATING CURRENT ELECTRICITY, COMPRISING A PHOTO RESISTOR, A RELAY COIL, THE RESISTOR AND THE COIL BEING CONNECTED IN SERIES FOR CONNECTION ACROSS THE SOURCE, MEANS CAUSING THE LIGHT TO PASS IN A DEFINED PATH TO THE RESISITOR, A MOVABLE ELEMENT ASSOCIATED WITH THE COIL AND ADAPTED ON MOVEMENT TO BRING ABOUT A SWITCHING FUNCTION, A SHIELD ACTUATED BY THE MOVABLE ELEMENT FROM A FIRST POSITION IN THE
Claim 2
Dependent Claim
76 words
A PHOTO-ELECTRIC RELAY FOR USE WITH A SOURCE OF ALTERNATING CURRENT ELECTRICITY, COMPRISING A PHOTO RESISTOR, A RELAY COIL, THE RESISTOR AND THE COIL BEING CONNECTED IN SERIES FOR CONNECTION ACROSS THE SOURCE, MEANS CAUSING THE LIGHT TO PASS IN A DEFINED PATH TO THE RESISITOR, A MOVABLE ELEMENT ASSOCIATED WITH THE COIL AND ADAPTED ON MOVEMENT TO BRING ABOUT A SWITCHING FUNCTION, A SHIELD ACTUATED BY THE MOVABLE ELEMENT FROM A FIRST POSITION IN THE
References Cited (Backward Citations)
US1788111A
Cited
US2913637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |