Patent US3077940A successfully refreshed from Google Patents.
US3077940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-taring net weigher
Assignee: Foils Packaging Corp
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Filing: 1958-07-15
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Granted: 1963-02-19
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Expires: 1978-07-15
Abstract
No abstract record available.
Inventors
- 👤 Stewart B Blodgett
- 👤 Fred D Sher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
G; G01; G01G; G01G13/00; G01G13/24; G01G13/28; G01G13/295; G01G13/2958; G01G7/00; G01G7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A CONTROL SYSTEM COMPRISING A MEMORY UNIT INCLUDING A MOVABLE ARM, POWER MEANS CONNECTED TO SAID MOVABLE ARM AND OPERATIVE TO MOVE SAID ARM, CONTROL MEANS CONNECTED TO SAID POWER MEANS AND INCLUDING A DIFFERENTIAL TRANSFORMER HAVING A MOVABLE CORE AND A PAIR OF SECONDARY COILS, MEANS CONNECTING SAID MOVABLE CORE TO SAID MOVABLE ARM TO BE MOVED THEREWITH, A CIRCUIT INCLUDING SAID SECONDARY COILS, AND MEANS FOR GENERATING A FIRST ALTERNATING CURRENT FLOW IN SAID CIRCUIT TO OPERATE SAID POWER MEANS TO MOVE SAID ARM AND CORE, MEANS INCLUDING SAID MOVABLE CORE FOR GENERATING A SECOND ALTERNATING CURRENT FLOW IN SAID CIRCUIT EQUAL TO AND OF OPPOSITE PHASE TO SAID FIRST ALTERNATING CURRENT FLOW TO STOP SAID MOVABLE ARM IN A POSITION CORRESPONDING TO THE VALUE OF SAID FIRST ALTERNATING CURRENT FLOW, AND LOCKING MEANS TO HOLD SAID MOVABLE ARM IN SAID POSITION WHEREBY THE GENERATION OF SAID SECOND ALTERNATING CURRENT FLOW IS RETAINED IN SAID CIRCUIT, SAID LOCKING MEANS COMPRISING A FIXED ELEMENT AND A MOVABLE ELEMENT SPACED THEREFROM, MEANS MOUNTING SAID ELEMENTS WITH THE SPACE THEREBETWEEN IN THE PATH OF MOVEMENT OF SAID ARM.
Claim 2
Dependent Claim
187 words
A CONTROL SYSTEM COMPRISING A MEMORY UNIT INCLUDING A MOVABLE ARM, POWER MEANS CONNECTED TO SAID MOVABLE ARM AND OPERATIVE TO MOVE SAID ARM, CONTROL MEANS CONNECTED TO SAID POWER MEANS AND INCLUDING A DIFFERENTIAL TRANSFORMER HAVING A MOVABLE CORE AND A PAIR OF SECONDARY COILS, MEANS CONNECTING SAID MOVABLE CORE TO SAID MOVABLE ARM TO BE MOVED THEREWITH, A CIRCUIT INCLUDING SAID SECONDARY COILS, AND MEANS FOR GENERATING A FIRST ALTERNATING CURRENT FLOW IN SAID CIRCUIT TO OPERATE SAID POWER MEANS TO MOVE SAID ARM AND CORE, MEANS INCLUDING SAID MOVABLE CORE FOR GENERATING A SECOND ALTERNATING CURRENT FLOW IN SAID CIRCUIT EQUAL TO AND OF OPPOSITE PHASE TO SAID FIRST ALTERNATING CURRENT FLOW TO STOP SAID MOVABLE ARM IN A POSITION CORRESPONDING TO THE VALUE OF SAID FIRST ALTERNATING CURRENT FLOW, AND LOCKING MEANS TO HOLD SAID MOVABLE ARM IN SAID POSITION WHEREBY THE GENERATION OF SAID SECOND ALTERNATING CURRENT FLOW IS RETAINED IN SAID CIRCUIT, SAID LOCKING MEANS COMPRISING A FIXED ELEMENT AND A MOVABLE ELEMENT SPACED THEREFROM, MEANS MOUNTING SAID ELEMENTS WITH THE SPACE THEREBETWEEN IN THE PATH OF MOVEMENT OF SAID ARM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |