Patent US3159740A successfully refreshed from Google Patents.
US3159740A
Expired / Lapsed
US
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Universal radix adder
Assignee: International Business Machines Corp
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Filing: 1962-01-03
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Granted: 1964-12-01
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Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Broce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:52
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A CIRCUIT FOR ADDING TWO MIXED NUMBERS HAVING A PLURALITY OF ORDERS, COMPRISING: TWO REGISTERS; MEANS FOR LOADING A FIRST ORDER OF SAID NUMBERS INTO SAID REGISTER; A SOURCE OF PULSES; CONTROL MEANS; MEANS FOR GATING SAID PULSES FROM SAID SOURCE UNDER CONTROL OF SAID CONTROL MEANS TO STEP ONE OF SAID REGISTERS DOWN TO ZERO AND THE OTHER RIGISTER UPWARD THE SAME NUMBER OF STEPS SO THAT THE FIRST ORDER OF ONE OF SAID NUMBERS IS ADDED TO THE FIRST ORDER OF THE OTHER OF SAID NUMBERS TEMPORARY STORAGE MEANS; LOGIC MEANS OPERABLE TO SELECT A RADIX WITHIN THE CAPACITY OF SAID SECOND REGISTER SO THAT THE SECOND REISTER WILL BE RESET AND A CARRY PULSE SENT OUT TO SAID TEMPORARY STORAGE MEANS WHEN THE SECOND REGISTER REACHES THE SELECTED RADIX; MEANS FOR LOADING THE NEXT ORDER OF SAID NUMBER INTO SAID REGISTERS; GATING MEANS FOR ENTERING A CARRY DIRECTLY INTO ONE OF SAID REGISTERS; AND MEANS TO REPEAT THE OPERATION FOR ALL ORDERS OF THE NUMBERS SEQUENTIALLY WHEREBY THE SUM OF THE TWO MIXED NUMBERS IS OBTAINED DIRECTLY.
Claim 2
Dependent Claim
180 words
A CIRCUIT FOR ADDING TWO MIXED NUMBERS HAVING A PLURALITY OF ORDERS, COMPRISING: TWO REGISTERS; MEANS FOR LOADING A FIRST ORDER OF SAID NUMBERS INTO SAID REGISTER; A SOURCE OF PULSES; CONTROL MEANS; MEANS FOR GATING SAID PULSES FROM SAID SOURCE UNDER CONTROL OF SAID CONTROL MEANS TO STEP ONE OF SAID REGISTERS DOWN TO ZERO AND THE OTHER RIGISTER UPWARD THE SAME NUMBER OF STEPS SO THAT THE FIRST ORDER OF ONE OF SAID NUMBERS IS ADDED TO THE FIRST ORDER OF THE OTHER OF SAID NUMBERS TEMPORARY STORAGE MEANS; LOGIC MEANS OPERABLE TO SELECT A RADIX WITHIN THE CAPACITY OF SAID SECOND REGISTER SO THAT THE SECOND REISTER WILL BE RESET AND A CARRY PULSE SENT OUT TO SAID TEMPORARY STORAGE MEANS WHEN THE SECOND REGISTER REACHES THE SELECTED RADIX; MEANS FOR LOADING THE NEXT ORDER OF SAID NUMBER INTO SAID REGISTERS; GATING MEANS FOR ENTERING A CARRY DIRECTLY INTO ONE OF SAID REGISTERS; AND MEANS TO REPEAT THE OPERATION FOR ALL ORDERS OF THE NUMBERS SEQUENTIALLY WHEREBY THE SUM OF THE TWO MIXED NUMBERS IS OBTAINED DIRECTLY.
References Cited (Backward Citations)
US2989237A
Cited
US3089644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |