Patent US3254204A successfully refreshed from Google Patents.
US3254204A
Expired / Lapsed
US
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Digital divider for integer and remainder division operations
Assignee: Unisys Corp
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Filing: 1962-12-11
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Granted: 1966-05-31
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Expires: 1982-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jack N Merner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:51
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/4915; G06F7/4917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
253 words
APPARATUS FOR DIVIDING TWO NUMBERS IN FLOATING-POINT NOTATION TO OBTAIN AN INTEGER QUOTIENT AND REMAINDER RESULT COMPRISING FIRST AND SECOND REGISTERS FOR STORING RESPECTIVELY THE MANTISSA AND EXPONENT OF THE DIVIDEND AND THE MANTISSA AND EXPONENT OF THE DIVISOR, MEANS FOR NORMALIZING THE MANTISSAS IN THE TWO REGISTERS AND ADJUSTING THE EXPONENT VALUES ACCORDINGLY, MEANS FOR COMPARING THE EXPONENT VALUES TO DETERMINE IF THE EXPONENT IN THE FIRST REGISTER IS GREATER THAN OR EQUAL TO THE EXPONENT IN THE SECOND REGISTER, A QUOTIENT COUNTER, A QUOTIENT REGISTER, MEANS FOR SUBTRACTING THE MANTISSA IN THE SECOND REGISTER FROM THE MANTISSA IN THE FIRST REGISTER AND REPLACING THE MANTISSA IN THE FIRST REGISTER WITH THE RESULT, CONTROL MEANS FOR INITIATING AND REPEATING THE SUBTRACTION OPERATION BY THE SUBTRACTION MEANS AS MANY TIMES AS POSSIBLE WITHOUT HAVING A NEGATIVE RESULT, THE CONTROL MEANS ADVACING THE COUNTER WITH EACH SUBTRACTION OPERATION, MEANS RESPONSIVE TO THE COMPARING MEANS AT THE END OF EACH REPETITIVE SUBTRACTION CYCLE WHEN THE EXPONENT IN THE FIRST REGISTER IS GREATER THAN THE EXPONENT IN THE SECOND REGISTER FOR SHIFTING THE MANTISSA IN THE FIRST REGISTER ONE DIGIT TO THE LEFT, DECREMENTING THE EXPONENT BY ONE DIGIT, TRANSFERRING THE DIGIT VALUE OF THE COUNTER TO THE QUOTIENT REGISTER AND ACTIVATING SAID CONTROL MEANS TO INITIATE ANOTHER REPETITIVE SUBTRACTION CYCLE, AND MEANS RESPONSIVE TO THE COMPARING MEANS AT THE END OF A REPETITIVE SUBTRACTION CYCLE WHEN THE EXPONENTS IN THE TWO REGISTERS ARE EQUAL FOR INTERRUPTING THE CONTROL MEANS TO PREVENT FURTHER REPETITIVE SUBTRACTION CYCLES.
References Cited (Backward Citations)
US3037701A
Cited
US3182180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |