← Back to Patent Explorer
US3219861A Expired / Lapsed US ⏱️ 0.0 years remaining

Alternating-current generator

Assignee: Printed Motors Inc
•
Filing: 1961-03-06
•
Granted: 1965-11-23
•
Expires: 1981-03-06
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Robert P Burr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 09:17
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/24; H02K3/00; H02K3/04; H02K3/26

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 240 words
AN ALTERNATING-CURRENT GENERATOR COMPRISING MEANS HAVING MAGNETIC POLES ALONG ITS PERIPHERY FOR DEVELOPING SUBSTANTIALLY DISCRETE CONCENTRATED MAGNETIC FIELD REGIONS OF SMALLER PERIPHERAL DIMENSION THAN CORRESPONDING PERIPHERAL REGIONS OF SAID FIELD-DEVELOPING MEANS AND WITH ADJACENT FIELD REGIONS BEING OF OPPOSITE POLARITY; AND A CONTINUOUS WINDING HAVING OPPOSITE FACES AND HAVING A FIRST SET OF CONDUCTOR FORMING ONE FACE DISPOSED IN SAID MAGNETIC FIELD REGIONS AND HAVING A SECOND SET OF CONDUCTORS FORMING THE OTHER FACE DISPOSED IN SAID MAGNETIC FIELD REGIONS AND HAVING BRIDGING CONNECTIONS CONNECTING SAID CONDUCTORS TO FORM WINDING LOOP REGIONS IN AT LEAST ONE SERIES CIRCUIT WITH SUCCESSIVE CONDUCTORS IN SAID SERIES CIRCUIT BEING IN DIFFERENT SETS AND BEING SPACED APART BY MORE THAN ONE CONDUCTOR SPACING, SAID WINDING HAVING OUTPUT CONNECTIONS TO PREDETERMINED CONDUCTORS AND HAVING A NUMBER OF LOOP REGIONS WHICH IS AN INTEGRAL MULTIPLE OF THE NUMBER OF POLES OF SAID FIELD-DEVELOPING MEANS, SAID NUMBER OF LOOP REGIONS BEING SELECTED IN ACCORDANCE WITH THE EQUATION N=2+4KN, WHERE THE PARAMETERS ARE AS DEFINED IN THE SPECIFICATION, AND PROVIDING AT LEAST TWO PAIRS OF LOOP REGIONS PER MAGNETIC FIELD REGION, SAID FIELD-DEVELOPING MEANS BEING EFFECTIVE TO CONCENTRATE EACH MAGNETIC FIELD REGION SUBSTANTIALLY WITHIN ONE LOOP REGION, ONE OF SAID FIELD-DEVELOPING MEANS AND SAID WINDING MEANS BEING ROTATABLE WITH RESPECT TO THE OTHER FOR DEVELOPING AND ALTERNATING-CURRENT OUTPUT SIGNAL HAVING A HIGH FREQUENCY OF ELECTRICAL CYCLES PER REVOLUTION OF ONE OF SAID FIELD-DEVELOPING MEANS AND SAID WINDING MEANS.
Claim 2
Dependent Claim 240 words
AN ALTERNATING-CURRENT GENERATOR COMPRISING MEANS HAVING MAGNETIC POLES ALONG ITS PERIPHERY FOR DEVELOPING SUBSTANTIALLY DISCRETE CONCENTRATED MAGNETIC FIELD REGIONS OF SMALLER PERIPHERAL DIMENSION THAN CORRESPONDING PERIPHERAL REGIONS OF SAID FIELD-DEVELOPING MEANS AND WITH ADJACENT FIELD REGIONS BEING OF OPPOSITE POLARITY; AND A CONTINUOUS WINDING HAVING OPPOSITE FACES AND HAVING A FIRST SET OF CONDUCTOR FORMING ONE FACE DISPOSED IN SAID MAGNETIC FIELD REGIONS AND HAVING A SECOND SET OF CONDUCTORS FORMING THE OTHER FACE DISPOSED IN SAID MAGNETIC FIELD REGIONS AND HAVING BRIDGING CONNECTIONS CONNECTING SAID CONDUCTORS TO FORM WINDING LOOP REGIONS IN AT LEAST ONE SERIES CIRCUIT WITH SUCCESSIVE CONDUCTORS IN SAID SERIES CIRCUIT BEING IN DIFFERENT SETS AND BEING SPACED APART BY MORE THAN ONE CONDUCTOR SPACING, SAID WINDING HAVING OUTPUT CONNECTIONS TO PREDETERMINED CONDUCTORS AND HAVING A NUMBER OF LOOP REGIONS WHICH IS AN INTEGRAL MULTIPLE OF THE NUMBER OF POLES OF SAID FIELD-DEVELOPING MEANS, SAID NUMBER OF LOOP REGIONS BEING SELECTED IN ACCORDANCE WITH THE EQUATION N=2+4KN, WHERE THE PARAMETERS ARE AS DEFINED IN THE SPECIFICATION, AND PROVIDING AT LEAST TWO PAIRS OF LOOP REGIONS PER MAGNETIC FIELD REGION, SAID FIELD-DEVELOPING MEANS BEING EFFECTIVE TO CONCENTRATE EACH MAGNETIC FIELD REGION SUBSTANTIALLY WITHIN ONE LOOP REGION, ONE OF SAID FIELD-DEVELOPING MEANS AND SAID WINDING MEANS BEING ROTATABLE WITH RESPECT TO THE OTHER FOR DEVELOPING AND ALTERNATING-CURRENT OUTPUT SIGNAL HAVING A HIGH FREQUENCY OF ELECTRICAL CYCLES PER REVOLUTION OF ONE OF SAID FIELD-DEVELOPING MEANS AND SAID WINDING MEANS.

References Cited (Backward Citations)

US447921A Cited
CH217875A Cited
US2970238A Cited
US3109114A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1968-11-22 1969-05-24 1969-11-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1972-11-22 1973-05-24 1973-11-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1976-11-22 1977-05-24 1977-11-23 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag