US3816730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic calculator with an incorporated digital clock
Assignee: Omron Corp
•
Filing: 1972-10-04
•
Granted: 1974-06-11
•
Expires: 1992-10-04
Abstract
Abstract An electronic calculator incorporated with a digital clock, which comprises an arithmetical calculating section, a digital clock section, a display section which is commonly used for displaying the result of arithmetic calculation performed by the calculating section and for displaying the time information yielded by the clock section and a switch for selectively bringing one of the sections into operation to permit the calculator to function as either a calculator or a clock in response to the operation of the switch.
Inventors
- 👤 M Yamamoto
- 👤 F Hayakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/087; G04G9/0064; G04G9/007; G06; G06F; G06F15/00; G06F15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
356 words
An electronic apparatus operating as a calculator or digital clock comprising means for generating clock pulses of a predetermined frequency, a first register for storing time information, a full adder having one input terminal connected to an output of said means for generating clock pulses and another input terminal connected to an output of said first register, said full adder having an output terminal connected to an input of said first register such that the contents of said first register is added to the output of said means for generating clock pulses by said full adder with the result stored in said first register in the form of time information, a keyboard having a plurality of numeric keys representing decimal numbers zero through nine and a plurality of function keys, a calculator section being connected to said keyboard for generating arithmetic information which is indicative of the result of an arithmetic operation performed in accordance with the operation of said numeric keys and function keys on said keyboard, a second register for stOring either the time information that has been stored in said first register or the arithmetic information, switch means disposed in said keyboard for generating an electric signal which is utilized to selectively switch the electronic apparatus to function as either a calculator or a clock, gate means controlled in response to said electric signal from said switch means to feed the time information stored in said first register or the arithmetic information result of said calculator section to said second register, means for displaying the content stored in said second register in the digital form, a correction key switch disposed in said keyboard for adjusting the currently displayed time to a correct time, means for clearing the time information stored in said first register in response to a signal generated upon closure of said correction key switch and means operable in response to said signal generated upon closure of said correction key switch to feed a new time information to said first register which is to be displayed through said displaying means as the correct time upon operation of said correction key switch.
Claim 2
Dependent Claim
356 words
An electronic apparatus operating as a calculator or digital clock comprising means for generating clock pulses of a predetermined frequency, a first register for storing time information, a full adder having one input terminal connected to an output of said means for generating clock pulses and another input terminal connected to an output of said first register, said full adder having an output terminal connected to an input of said first register such that the contents of said first register is added to the output of said means for generating clock pulses by said full adder with the result stored in said first register in the form of time information, a keyboard having a plurality of numeric keys representing decimal numbers zero through nine and a plurality of function keys, a calculator section being connected to said keyboard for generating arithmetic information which is indicative of the result of an arithmetic operation performed in accordance with the operation of said numeric keys and function keys on said keyboard, a second register for stOring either the time information that has been stored in said first register or the arithmetic information, switch means disposed in said keyboard for generating an electric signal which is utilized to selectively switch the electronic apparatus to function as either a calculator or a clock, gate means controlled in response to said electric signal from said switch means to feed the time information stored in said first register or the arithmetic information result of said calculator section to said second register, means for displaying the content stored in said second register in the digital form, a correction key switch disposed in said keyboard for adjusting the currently displayed time to a correct time, means for clearing the time information stored in said first register in response to a signal generated upon closure of said correction key switch and means operable in response to said signal generated upon closure of said correction key switch to feed a new time information to said first register which is to be displayed through said displaying means as the correct time upon operation of said correction key switch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |