US3238326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contactor with a load current hold-in feature
Assignee: Allis Chalmers Corp
•
Filing: 1964-06-26
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Granted: 1966-03-01
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Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert J Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/50; H01H1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CONTACTOR COMPRISING A STATIONARY AND MOVABLE CONTACT MEANS, A MAGNETIC FRAME, A COIL ASSOCIATED WITH SAID FRAME FOR PRODUCING A MAGNETIC FLUX THEREIN, A MOVABLE CONDUCTOR CONNECTED TO SAID MOVABLE CONTACT MEANS, A YOKE PARTIALLY SURROUNDING SAID MOVABLE CONDUCTOR, AN ARMATURE INTERPOSED BETWEEN SAID MOVABLE CONDUCTOR AND SAID MAGNETIC FRAME, SAID ARMATURE BEING CONNECTED TO AND MOVABLE WITH SAID YOKE AND SAID MOVABLE CONDUCTOR, SAID ARMATURE BEING SPLIT SO AS TO FORM A LOW RELUCTANCE MAGNETIC PATH AROUND SAID MOVABLE CONDUCTOR THAT INCLUDES SAID YOKE, SAID ARMATURE AND SAID MAGNETIC FRAME TO INCREASE THE HOLDING FORCE ON SAID MOVABLE CONDUCTOR AS CURRENT PASSES THROUGH SAID CONTACT MEANS AND SAID MOVABLE CONDUCTOR.
Claim 2
Dependent Claim
112 words
A CONTACTOR COMPRISING A STATIONARY AND MOVABLE CONTACT MEANS, A MAGNETIC FRAME, A COIL ASSOCIATED WITH SAID FRAME FOR PRODUCING A MAGNETIC FLUX THEREIN, A MOVABLE CONDUCTOR CONNECTED TO SAID MOVABLE CONTACT MEANS, A YOKE PARTIALLY SURROUNDING SAID MOVABLE CONDUCTOR, AN ARMATURE INTERPOSED BETWEEN SAID MOVABLE CONDUCTOR AND SAID MAGNETIC FRAME, SAID ARMATURE BEING CONNECTED TO AND MOVABLE WITH SAID YOKE AND SAID MOVABLE CONDUCTOR, SAID ARMATURE BEING SPLIT SO AS TO FORM A LOW RELUCTANCE MAGNETIC PATH AROUND SAID MOVABLE CONDUCTOR THAT INCLUDES SAID YOKE, SAID ARMATURE AND SAID MAGNETIC FRAME TO INCREASE THE HOLDING FORCE ON SAID MOVABLE CONDUCTOR AS CURRENT PASSES THROUGH SAID CONTACT MEANS AND SAID MOVABLE CONDUCTOR.
References Cited (Backward Citations)
US2679561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |