GB1476954A - Scientific calculator - Google Patents
Scientific calculatorInfo
- Publication number
- GB1476954A GB1476954A GB4614976A GB4614976A GB1476954A GB 1476954 A GB1476954 A GB 1476954A GB 4614976 A GB4614976 A GB 4614976A GB 4614976 A GB4614976 A GB 4614976A GB 1476954 A GB1476954 A GB 1476954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- register
- field
- storing
- entered
- fields
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G99/00—Subject matter not provided for in other groups of this subclass
- G04G99/006—Electronic time-pieces using a microcomputer, e.g. for multi-function clocks
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0064—Visual time or date indication means in which functions not related to time can be displayed
- G04G9/007—Visual time or date indication means in which functions not related to time can be displayed combined with a calculator or computing means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
- G06F15/0225—User interface arrangements, e.g. keyboard, display; Interfaces to other computer systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
- G06F15/025—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators adapted to a specific application
- G06F15/0258—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators adapted to a specific application for unit conversion
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- Mathematical Physics (AREA)
- Calculators And Similar Devices (AREA)
- Electric Clocks (AREA)
- Complex Calculations (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Input From Keyboards Or The Like (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
1476954 Calculators HEWLETT-PACKARD CO 30 April 1974 [29 May 1973] 46149/76 Divided out of 1476951 Heading G4A An electronic calculator for calculating the factorial of a positive number entered into the calculator includes a first storage register for initially storing the entered number and for subsequently storing decremented values thereof, a second storage register, having a first field includings 1s and 10s digit positions for storing a preselected constant number in the 10s position and a second field initially storing zero, and a third storage register coupled to the first and second storage registers, having a first field including 1s and 10s digit positions for storing successively modified values of the entered value and a second field initially storing the entered number, a processing unit coupled to the three registers repetitively decrementing the entered number until it is zero and, following each such decrementing, transferring the contents of the second field of the third register to the second field of the second register and zeroing the second field of the third register, transferring each decremented value of the entered number to the first field of the third register, adding the first fields of the second and third registers and storing the result in the first field of the third register, adding the second fields of the second and third register and storing the result in the second field of the third register until the 10s digit position of the first field of the third register equals a first value (as described, zero) thereupon left shifting the numbers stored in the first and second fields of the third register whereupon a second series of additions of the contents of the first and second fields of the second and third registers is performed until the 10s position of the first field of the third register equals the first value, this process being repeated until the contents of the first register and the first field of the third register are both zero. Specifications 1,476,951, 1,476,952 and 1,476,954 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36457073A | 1973-05-29 | 1973-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1476954A true GB1476954A (en) | 1977-06-16 |
Family
ID=23435094
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4614876A Expired GB1476953A (en) | 1973-05-29 | 1974-04-30 | Scientific calculator |
| GB4614776A Expired GB1476952A (en) | 1973-05-29 | 1974-04-30 | Scientific calculator |
| GB4614976A Expired GB1476954A (en) | 1973-05-29 | 1974-04-30 | Scientific calculator |
| GB1889374A Expired GB1476951A (en) | 1973-05-29 | 1974-04-30 | Electronic calculators |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4614876A Expired GB1476953A (en) | 1973-05-29 | 1974-04-30 | Scientific calculator |
| GB4614776A Expired GB1476952A (en) | 1973-05-29 | 1974-04-30 | Scientific calculator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1889374A Expired GB1476951A (en) | 1973-05-29 | 1974-04-30 | Electronic calculators |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5653784B2 (en) |
| AU (1) | AU471040B2 (en) |
| CA (1) | CA1028427A (en) |
| CH (1) | CH611762GA3 (en) |
| DE (2) | DE2424756C3 (en) |
| FR (1) | FR2232011B1 (en) |
| GB (4) | GB1476953A (en) |
| ZA (1) | ZA743469B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525565A (en) * | 1975-07-02 | 1977-01-17 | Toshiba Corp | Electric clock circuit |
| US4063409A (en) * | 1976-01-05 | 1977-12-20 | Intel Corporation | Custom watch |
| US4158285A (en) * | 1976-02-09 | 1979-06-19 | Hewlett-Packard Company | Interactive wristwatch calculator |
| JPS6059553B2 (en) * | 1976-12-01 | 1985-12-25 | カシオ計算機株式会社 | timing device |
| US4181963A (en) * | 1977-04-19 | 1980-01-01 | Casio Computer Co., Ltd. | Electronic calculator with time counting function |
| JPS5451510A (en) * | 1977-09-30 | 1979-04-23 | Olympus Optical Co Ltd | Tape recorder |
| DE2812242A1 (en) * | 1978-03-21 | 1979-10-04 | Bosch Gmbh Robert | PROGRAMMABLE SEQUENCE CONTROL |
| DE2951162A1 (en) * | 1979-12-19 | 1981-07-02 | Casio Computer Co., Ltd., Tokyo | Power consumption control system for digital processor - has clock pulse generator disabled at pre-determined period after last key-in operation using counter circuit detector |
| JPS5842499B2 (en) * | 1980-11-05 | 1983-09-20 | オムロン株式会社 | electronic cash register |
| JPS57185562A (en) * | 1981-05-12 | 1982-11-15 | Casio Comput Co Ltd | Small-sized electronic calculator with program |
| JPS5890262A (en) * | 1981-11-25 | 1983-05-28 | Sharp Corp | Electronic device |
| JPS61180182U (en) * | 1985-04-27 | 1986-11-10 | ||
| JPS6142491U (en) * | 1985-07-18 | 1986-03-19 | セイコーエプソン株式会社 | Timing device with computer |
| GB2224866A (en) * | 1988-11-02 | 1990-05-16 | Julian David Williams | Improvements in or relating to an event recording device |
-
1974
- 1974-04-19 CA CA198,074A patent/CA1028427A/en not_active Expired
- 1974-04-30 GB GB4614876A patent/GB1476953A/en not_active Expired
- 1974-04-30 GB GB4614776A patent/GB1476952A/en not_active Expired
- 1974-04-30 GB GB4614976A patent/GB1476954A/en not_active Expired
- 1974-04-30 GB GB1889374A patent/GB1476951A/en not_active Expired
- 1974-05-07 AU AU68681/74A patent/AU471040B2/en not_active Expired
- 1974-05-22 DE DE2424756A patent/DE2424756C3/en not_active Expired
- 1974-05-22 CH CH708674A patent/CH611762GA3/en unknown
- 1974-05-25 DE DE2462301A patent/DE2462301C3/en not_active Expired
- 1974-05-27 FR FR7418231A patent/FR2232011B1/fr not_active Expired
- 1974-05-29 ZA ZA00743469A patent/ZA743469B/en unknown
- 1974-05-29 JP JP6178274A patent/JPS5653784B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA743469B (en) | 1975-06-25 |
| AU471040B2 (en) | 1976-04-08 |
| DE2462301C3 (en) | 1978-09-28 |
| FR2232011A1 (en) | 1974-12-27 |
| JPS5653784B2 (en) | 1981-12-21 |
| DE2462301B2 (en) | 1978-01-05 |
| CH611762GA3 (en) | 1979-06-29 |
| GB1476953A (en) | 1977-06-16 |
| CA1028427A (en) | 1978-03-21 |
| DE2424756C3 (en) | 1978-06-01 |
| DE2462301A1 (en) | 1976-09-16 |
| JPS5047531A (en) | 1975-04-28 |
| DE2424756A1 (en) | 1975-01-09 |
| CH611762B (en) | |
| AU6868174A (en) | 1975-11-13 |
| GB1476951A (en) | 1977-06-16 |
| DE2424756B2 (en) | 1977-10-06 |
| FR2232011B1 (en) | 1982-02-19 |
| GB1476952A (en) | 1977-06-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19940429 |