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US3188406A Expired / Lapsed US ⏱️ 0.0 years remaining

Multiple plunger electrical switch for sequential contact operation and dynamic braking

Assignee: Ward Leonard Electric Co
•
Filing: 1961-01-05
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Granted: 1965-06-08
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Expires: 1981-01-05
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Abstract

No abstract record available.

Inventors

  • 👤 Scribner Arthur Clayton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 13:45
CPC Classifications
H; H01; H01H; H01H36/00

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 232 words
IN A ELECTRICAL SWITCH; FIXED MAIN CONTACTS, A MAIN CONTACT CARRIER RECIPROCALLY MOUNTED TO MOVE ALONG A LINE OF MOVEMENT IN AND OUT OF ENGAGING POSITION WITH SAID MAIN CONTACTS, RESILIENT MEANS ENGAGING SAID CARRIER FOR URGING SAID CARRIER OUT OF ENGAGING POSITION, A FIRST AND SECOND PAIR OF FIXED AUXILIARY CONTACCTS SPACED ALONG THE LINE OF MOVEMENT OF SAID CONTACT CARRIER, A CONTACT PLUNGER RECIPROCALLY MOUNTED ON SAID MAIN CONTACT CARRIER TO MOVE IN THE DIRECTION OF SAIF CONTACT CARRIER TO ENGAGE THE FIRST PAIR OF AUXILIARY CONTACTS ON MOVEMENT IN MAIN CONTACT ENGAGEMENT AND TO ENGAGE THE SECOND PAIR OF AUXILIARY CONTACTS ON MOVEMENT FROM THE MAIN CONTACT ENGAGEMENT, RESILIENT MEANS MOUNTED BETWEEN SAID PLUNGER AND CARRIER FOR URGING SAID PLUNGER OUT OF ENGAGING POSITION WITH SAID FIRST PAIR AND SAID MAIN CARRIER, SAID PLUNGER BEING NORMALLY SPACED FROM SAID MAIN CARRIER ALONG THE LINE OF MOVEMENT TO PROVIDE AN INITIAL LEADING ADVANCE INTO AUXILIARY CONTACT ENGAGING POSITION OF SAID PLUNGER OVER MAIN CONTACT ENGAGING POSITION RIER, AND SAID PLUNGER RESILIENT MEANS RETURNING SAID PLUNGER TO A POSITION OUT OF CONTACT ON MAINTAINED ENGAGEPAIRS OF SAID AUXILIARY CONTACTS ON MAINTAINING ENGAGEMENT OF SAID AUXIARY CONTACT CARRIER AND ON DISENGAGEMENT OF SAID CONTACT CARRIER FROM THE ENGAGING POSITION SAID MAIN RESILIENT MEANS FORCING SAID PLUNGER IN COOPERATION WITH SAID PLUNGER RESILIENT MEANS INTO ENGAGEMENT WITH THE SECOND PAIR OF AUXILIARY CONTACTS.

References Cited (Backward Citations)

US588489A Cited
US2036295A Cited
US1096470A Cited
US1494402A Cited
US1903876A Cited
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US2968704A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1968-06-07 1968-12-07 1969-06-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1972-06-07 1972-12-07 1973-06-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1976-06-07 1976-12-07 1977-06-08 $7700.00 Window Closed / Lapsed

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