 |
|
|
|
|
|
 Title: |
US3819921:
MINIATURE ELECTRONIC CALCULATOR
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Kilby, Jack S.; Dallas, TX
Merryman, Jerry D.; Dallas, TX
Van Tassel, James H.; Dallas, TX
|
| Assignee: |
Texas Instruments Incorporated, Dallas, TX
other patents from TEXAS INSTRUMENTS, INCORPORATED (570160) (approx. 11,758)
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
1974-06-25
/ 1972-12-21
|
| Application Number: |
US1972000317493
|
| IPC Code: |
Advanced:
G06F 15/02;
Core:
more...
IPC-7:
G06F 7/38;
|
| U.S. Class: |
Current:
708/190;
708/173;
Original:
235/156;
235/159;
|
| Field of Search: |
235/156,159,145
340/365,347 DD
219/201
|
| Priority Number: |
| 1971-05-13 |
US1971000143192 |
| 1967-09-29 |
US1967000671777 |
|
| Abstract: |
Binary-coded decimal electronic calculator capable of adding, subtracting, multiplying and dividing with some degree of automatic decimal point placement to provide a visual display of answers of up to 12 decimal digits. The decimal digits are serially displayed at a speed compatible with the calculator operations. The parts of the calculator are so adapted electrically and mechanically in relation to each other to result in a minature portable battery operated calculator of extremely small dimensions for example the outside case dimensions of 41/4 inches by 61/8 inches by 13/4 inches and very low weight of about 45 ounces, having a calculating capability only before obtainable in calculators of much larger size and weight while retaining mechanical and operational simplicity. Some significant aspects of the calculator are the primary electronics embodied in an integrated semiconductor circuit array located in substantially one plane for performing the arithmetic calculations and generating the control signals, a keyboard input arrangement located in substantially one plane parallel to the integrated semiconductor circuit array for producing unique electrical signals corresponding to number and command entries and a visual display using a semiconductor array, as for a thermal printer for printout.
|
| Attorney, Agent or Firm: |
Levine, Harold ;
Connors, Jr., Edward ;
Graham, John G. ;
|
| Primary / Asst. Examiners: |
Atkinson, Charles E.; Gottman, James F.
|
| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
|
|
|
|
|
|
|
| Related Applications: |
| Application Number |
Filed |
Patent |
Pub. Date |
Title |
|---|
| US1971000143192 | 1971-05-13 |
|
|
|
| US1967000671777 | 1967-09-29 |
|
|
|
|
|
|
|
|
|
|
| Parent Case: |
This application is a conitnuation of copending application Ser. No. 143,192, filed May 13, 1971 (now abandoned), which was a continuation of then-copending application Ser. No. 671,777, filed Sept. 29, 1967 (now abandoned).
|
| Family: |
Show 13 known family members
|
First Claim:
Show all 59 claims |
What is claimed is:
1. A miniature, portable, battery operated electronic calculator comprising:
- a. input means including a keyboard for entering digits of numbers and arithmetic commands into said calculator and generating signals corresponding to said digits and said commands, the keyboard including only one set of decimal number keys for entering plural digits of decimal numbers in sequence and including a plurality of command keys;
- b. electronic means responsive to said signals for performing arithmetic calculations on the numbers entered into the calculator and for generating control signals, said electronic means comprising an integrated semiconductor circuit array located in substantially one plane, the area occupied by the integrated semiconductor array being no greater than that of the keyboard, said integrated semiconductor circuit array comprising:
- i. memory means for storing the digits of the numbers entered into the calculator,
- ii. arithmetic means coupled to said memory means for adding, subtracting, multiplying and dividing said numbers and storing the resulting answer in the memory means, and
- iii. means for selectively transferring numbers from the memory means through the arithmetic means and back to the memory means in a manner dependent upon the commands to effect the desired arithmetic operation;
- c. means for providing a visual display coupled to said integrated semiconductor circuit array and responsive to said control signals for indicating said answer; and
- d. the entire calculator including keyboard, electronic means, means for providing a visual display, and battery being contained within a "pocket sized" housing.
|
| Background / Summary: |
Show background / summary
|
| Drawing Descriptions: |
Show drawing descriptions
|
| Description: |
Show description
|
| Forward References: |
Show 15 U.S. patent(s) that reference this one
|
|
