US3296513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing motor control including load sensing to determine optimum reversal point
Assignee: Bethlehem Steel Corp
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Filing: 1963-08-09
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Granted: 1967-01-03
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Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 David C Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
ELECTRICAL CIRCUITRY FOR DETECTING AND SIGNALLING THE PRESENCE OR ABSENCE OF A MECHANICAL LOAD ON AN ELECTRIC MOTOR POWERED FROM AN ELECTRICAL SOURCE OF POWER HAVING OUTPUT TERMINALS WITH AN OUTPUT VOLTAGE ACROSS SAID OUTPUT TERMINALS ADJUSTABLE BETWEEN 0 VOLTS AND A RATED VOLTAGE, COMPRISING: (A) FIRST MEANS ELECTRICALLY ASSOCIATED WITH THE ARMATURE OF SAID MOTOR AND RESPONSIVE TO THE ARMATURE CURRENT FLOWING THEREIN, SAID FIRST MEANS BEING ADAPTED TO EMIT A FIRST OUTPUT SIGNAL IN RESPONSE TO ARMATURE CURRENTS BELOW A PREDETERMINED VALUE AND A SECOND OUTPUT SIGNAL IN RESPONSE TO ARMATURE CURRENT ABOVE THE SAID PREDETERMINED VALUE, (B) SECOND MEANS ELECTRICALLY ASSOCIATED WITH THE OUTPUT TERMINALS OF SAID ELECTRICAL SOURCE OF POWER AND RESPONSIVE TO THE OUTPUT VOLTAGE OF SAID ELECTRICAL SOURCE OF POWER, SAID SECOND MEANS BEING ADAPTED TO EMIT A FIRST OUTPUT SIGNAL IN RESPONSE TO ELECTRICAL SOURCE OUTPUT VOLTAGES BELOW A PREDETERMINED VALUE AND A SECOND OUTPUT SIGNAL IN RESPONSE TO ELECTRICAL SOURCE OUTPUT VOLTAGES ABOVE THE SAID PREDETERMINED VALUE,
Claim 2
Dependent Claim
165 words
ELECTRICAL CIRCUITRY FOR DETECTING AND SIGNALLING THE PRESENCE OR ABSENCE OF A MECHANICAL LOAD ON AN ELECTRIC MOTOR POWERED FROM AN ELECTRICAL SOURCE OF POWER HAVING OUTPUT TERMINALS WITH AN OUTPUT VOLTAGE ACROSS SAID OUTPUT TERMINALS ADJUSTABLE BETWEEN 0 VOLTS AND A RATED VOLTAGE, COMPRISING: (A) FIRST MEANS ELECTRICALLY ASSOCIATED WITH THE ARMATURE OF SAID MOTOR AND RESPONSIVE TO THE ARMATURE CURRENT FLOWING THEREIN, SAID FIRST MEANS BEING ADAPTED TO EMIT A FIRST OUTPUT SIGNAL IN RESPONSE TO ARMATURE CURRENTS BELOW A PREDETERMINED VALUE AND A SECOND OUTPUT SIGNAL IN RESPONSE TO ARMATURE CURRENT ABOVE THE SAID PREDETERMINED VALUE, (B) SECOND MEANS ELECTRICALLY ASSOCIATED WITH THE OUTPUT TERMINALS OF SAID ELECTRICAL SOURCE OF POWER AND RESPONSIVE TO THE OUTPUT VOLTAGE OF SAID ELECTRICAL SOURCE OF POWER, SAID SECOND MEANS BEING ADAPTED TO EMIT A FIRST OUTPUT SIGNAL IN RESPONSE TO ELECTRICAL SOURCE OUTPUT VOLTAGES BELOW A PREDETERMINED VALUE AND A SECOND OUTPUT SIGNAL IN RESPONSE TO ELECTRICAL SOURCE OUTPUT VOLTAGES ABOVE THE SAID PREDETERMINED VALUE,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |