US3081942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-to-analog control system
Assignee: International Business Machines Corp
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Filing: 1961-09-18
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Granted: 1963-03-19
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 William R Maclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:06
CPC Classifications
H; H03; H03M; H03M1/00; F; F15; F15C; F15C4/00; F15B; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/40592; H03M1/12; H03M1/1205; Y; Y10; Y10S; Y10S91/00; Y10S91/01; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87281; Y10T137/8729; Y10T137/87298; Y10T137/87306; Y10T137/87314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
325 words
APPARATUS FOR CONVERTING A CODED SET OF TIMED ELECTRICAL SIGNALS WHEREIN EACH OF SAID ELECTRICAL SIGNALS IS CHARACTERIZED BY EITHER OF TWO STATES, COMPRISING: A SOURCE OF FLUID UNDER PRESSURE; A FLUID DRIVE MEANS; MEANS INTERCONNECTING SAID SOURCE AND SAID FLUID DRIVE MEANS; SAID MEANS INTERCONNECTING COMPRISING A PLURALITY OF PARALLEL CONDUITS; A PRECALIBRATED RATE ORIFICE DISPOSED IN EACH OF SAID CONDUITS; A CONTROL VALVE POSITIONED IN EACH OF SAID CONDUITS; A STORAGE DEVICE FOR THE TEMPORARY STORAGE OF SAID SET OF TIMED ELECTRICAL SIGNALS; SAID STORAGE DEVICE HAVING A PLURALITY OF BIT POSITIONS WITH EACH BIT POSITION STORING ONE OF SAID SET OF TIMED ELECTRICAL SIGNALS; OUTPUT MEANS ASSOCIATED WITH SAID BIT POSITIONS OF SAID STORAGE DEVICE AND PROVIDING OUTPUT SIGNALS CORRESPONDING TO THE TIMED ELECTRICAL SIGNALS STORED THEREIN; EACH OF SAID OUTPUT SIGNALS ACTUATING ONE OF THE CONTROL VALVES WHEREBY WHEN AN OUTPUT SIGNAL IS IN ONE STATE THE CONTROL VALVE ASSOCIATED THEREWITH IS OPEN TO PERMIT THE FLOW OF FLUID AND WHEN SAID OUTPUT SIGNAL IS IN THE OTHER STATE SAID CONTROL VALVE ASSOCIATED THEREWITH IS CLOSED TO PREVENT THE FLOW OF FLUID; EACH OF SAID PRECALIBRATED RATE ORIFICES HAVING A SIZE WHICH CORRESPONDS TO THE DECIMAL WEIGHTING OF SAID SET OF ELECTRICAL SIGNALS SO THAT SAID DRIVE MEANS IS SUPPLIED WITH FLUID WHICH IS THE ANALOG EQUIVALENT OF SAID SET OF TIMED ELECTRICAL SIGNALS; A PULSE GENERATING MEANS RESPONSIVE TO AND PRODUCING PULSES CORRESPONDING TO THE FLOW OF FLUID TO SAID DRIVE MEANS; AN ACCUMULATOR MEANS FOR STORING THE PULSES GENERATED BY SAID PULSE GENERATING MEANS DURING A TIMED CONTROL INTERVAL; COMPARATOR MEANS FOR COMPARING SAID SET OF ELECTRICAL SIGNALS AND THE QUANTITY STORED IN SAID ACCUMULATOR MEANS AT THE END OF A TIMED CONTROL INTERVAL TO PROVIDE A DIFFERENCE SIGNAL; AUXILIARY VALVE MEANS DISPOSED BETWEEN SAID SOURCE OF FLUID UNDER PRESSURE AND SAID DRIVE MEANS; AND CONTROL MEANS FOR ACTUATING SAID AUXILIARY VALVE MEANS IN RESPONSE TO SAID DIFFERENCE SIGNAL.
Claim 2
Dependent Claim
325 words
APPARATUS FOR CONVERTING A CODED SET OF TIMED ELECTRICAL SIGNALS WHEREIN EACH OF SAID ELECTRICAL SIGNALS IS CHARACTERIZED BY EITHER OF TWO STATES, COMPRISING: A SOURCE OF FLUID UNDER PRESSURE; A FLUID DRIVE MEANS; MEANS INTERCONNECTING SAID SOURCE AND SAID FLUID DRIVE MEANS; SAID MEANS INTERCONNECTING COMPRISING A PLURALITY OF PARALLEL CONDUITS; A PRECALIBRATED RATE ORIFICE DISPOSED IN EACH OF SAID CONDUITS; A CONTROL VALVE POSITIONED IN EACH OF SAID CONDUITS; A STORAGE DEVICE FOR THE TEMPORARY STORAGE OF SAID SET OF TIMED ELECTRICAL SIGNALS; SAID STORAGE DEVICE HAVING A PLURALITY OF BIT POSITIONS WITH EACH BIT POSITION STORING ONE OF SAID SET OF TIMED ELECTRICAL SIGNALS; OUTPUT MEANS ASSOCIATED WITH SAID BIT POSITIONS OF SAID STORAGE DEVICE AND PROVIDING OUTPUT SIGNALS CORRESPONDING TO THE TIMED ELECTRICAL SIGNALS STORED THEREIN; EACH OF SAID OUTPUT SIGNALS ACTUATING ONE OF THE CONTROL VALVES WHEREBY WHEN AN OUTPUT SIGNAL IS IN ONE STATE THE CONTROL VALVE ASSOCIATED THEREWITH IS OPEN TO PERMIT THE FLOW OF FLUID AND WHEN SAID OUTPUT SIGNAL IS IN THE OTHER STATE SAID CONTROL VALVE ASSOCIATED THEREWITH IS CLOSED TO PREVENT THE FLOW OF FLUID; EACH OF SAID PRECALIBRATED RATE ORIFICES HAVING A SIZE WHICH CORRESPONDS TO THE DECIMAL WEIGHTING OF SAID SET OF ELECTRICAL SIGNALS SO THAT SAID DRIVE MEANS IS SUPPLIED WITH FLUID WHICH IS THE ANALOG EQUIVALENT OF SAID SET OF TIMED ELECTRICAL SIGNALS; A PULSE GENERATING MEANS RESPONSIVE TO AND PRODUCING PULSES CORRESPONDING TO THE FLOW OF FLUID TO SAID DRIVE MEANS; AN ACCUMULATOR MEANS FOR STORING THE PULSES GENERATED BY SAID PULSE GENERATING MEANS DURING A TIMED CONTROL INTERVAL; COMPARATOR MEANS FOR COMPARING SAID SET OF ELECTRICAL SIGNALS AND THE QUANTITY STORED IN SAID ACCUMULATOR MEANS AT THE END OF A TIMED CONTROL INTERVAL TO PROVIDE A DIFFERENCE SIGNAL; AUXILIARY VALVE MEANS DISPOSED BETWEEN SAID SOURCE OF FLUID UNDER PRESSURE AND SAID DRIVE MEANS; AND CONTROL MEANS FOR ACTUATING SAID AUXILIARY VALVE MEANS IN RESPONSE TO SAID DIFFERENCE SIGNAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |