Patent US3209135A successfully refreshed from Google Patents.
US3209135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog division circuit
Assignee: AT&T Inc
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Filing: 1962-09-10
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Granted: 1965-09-28
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Myer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/25; G06G7/16; G06G7/161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A CIRCUIT FOR DETERMINING THE RATIO OF TWO NUMBERS REPRESENTED BY DIRECT VOLTAGES COMPRISING A FIRST CAPACITOR HAVING AND INITIAL VOLTAGE CHARAGE CONDITION, MEANS COUPLED TO SAID CAPACITOR FOR CHANGING ITS VOLTAGE CHARGE CONDITION BY AN AMOUNT REPRESENTING THE DIVIDEND OF SAID RATIO, MEANS CONNECTED TO SAID CAPACITOR FOR RESTORING ITS INITIAL VOLTAGE CHARGE CONDITION AT A CONSTANT CURRENT RATE, SAID RATE BEING REPRESENTATIVE OF THE DIVISOR OF SAID RATIO, A CIRCUIT MEANS HAVING TWO OPERATING STATES, MEANS CONNECTING SAID CIRCUIT MEANS ACROSS SAID FIRST CAPACITOR SO THAT SAID CIRCUIT MEANS WILL ASSUME ITS FIRST OPERATING STATE AT THE CHANGE VOLTAGE CHARGE CONDITION OF SAID FIRST CAPACITOR AND ASSUME ITS SECOND OPERATING STATE WHEN SAID CAPACITOR''S INITIAL AND A CONSTANT CURRENT CHARGING CIRCUIT SECOND CAPACITOR AND A CONSTANT CURRENT CHARGING CIRCUIT THEREFOR, SAID CONSTANT CURRENT CHARGING CIRCUIT BEING COUPLED TO SAID CIRCUIT MEANS AND TO SAID CAPACITOR AND SO CONSTRUCTED AS TO CHARGE SAID SECOND CAPACITOR AT A CONSTANT RATE ONLY RESPONSE TO SAID FIRST OPERATING STATE OF SAID CIRCUIT MEANS.
Claim 2
Dependent Claim
171 words
A CIRCUIT FOR DETERMINING THE RATIO OF TWO NUMBERS REPRESENTED BY DIRECT VOLTAGES COMPRISING A FIRST CAPACITOR HAVING AND INITIAL VOLTAGE CHARAGE CONDITION, MEANS COUPLED TO SAID CAPACITOR FOR CHANGING ITS VOLTAGE CHARGE CONDITION BY AN AMOUNT REPRESENTING THE DIVIDEND OF SAID RATIO, MEANS CONNECTED TO SAID CAPACITOR FOR RESTORING ITS INITIAL VOLTAGE CHARGE CONDITION AT A CONSTANT CURRENT RATE, SAID RATE BEING REPRESENTATIVE OF THE DIVISOR OF SAID RATIO, A CIRCUIT MEANS HAVING TWO OPERATING STATES, MEANS CONNECTING SAID CIRCUIT MEANS ACROSS SAID FIRST CAPACITOR SO THAT SAID CIRCUIT MEANS WILL ASSUME ITS FIRST OPERATING STATE AT THE CHANGE VOLTAGE CHARGE CONDITION OF SAID FIRST CAPACITOR AND ASSUME ITS SECOND OPERATING STATE WHEN SAID CAPACITOR''S INITIAL AND A CONSTANT CURRENT CHARGING CIRCUIT SECOND CAPACITOR AND A CONSTANT CURRENT CHARGING CIRCUIT THEREFOR, SAID CONSTANT CURRENT CHARGING CIRCUIT BEING COUPLED TO SAID CIRCUIT MEANS AND TO SAID CAPACITOR AND SO CONSTRUCTED AS TO CHARGE SAID SECOND CAPACITOR AT A CONSTANT RATE ONLY RESPONSE TO SAID FIRST OPERATING STATE OF SAID CIRCUIT MEANS.
References Cited (Backward Citations)
US3047232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |