US3740536A
Expired / Lapsed
US
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Electronic digital weighing apparatus
Assignee: Toshiba TEC Corp
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Filing: 1971-08-25
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Granted: 1973-06-19
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Expires: 1991-08-25
Abstract
Abstract An electronic digital weighing apparatus comprising a weight detecting section for detecting the weight of an object as an analog quantity and an analog-digital converter for converting the analog quantity to a digital quantity. The digital quantity is counted by an UP-DOWN counter the contents of which are drawn out in serial form. A unit price per unit weight of an object weighed is read into a unit price register. The serial output representing the contents of the UP-DOWN counter and the contents of a price register are added by the same number of times as the numerals stored in the unit price register. The results of the addition are introduced into the price register, and the serial output representing the contents of the UP-DOWN counter, and the contents of the unit price register and price register are indicated in digits.
Inventors
- 👤 N Osaka
- 👤 T Msysui
- 👤 Y Tomokubo
- 👤 Y Takahashi
- 👤 N Oshiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G23/37; G01G19/00; G01G19/40; G01G19/413; G01G19/414; G01G19/415; Y; Y10; Y10S; Y10S177/00; Y10S177/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
270 words
An electronic digital weighing apparatus having means for detecting the weight of an object in the form of an analog quantity; means for converting the analog quantity to a digital quantity; an UP-DOWN counter for counting said digital quantity; a parallel-serial converter for converting the content of said counter in serial form; means for setting the unit price of the object; a unit price register for storing data from said unit price setting means; a price register; means for adding together output of said parallel-serial converter and the content of said price register and having the results of addition stored in said price register; means for digitally indicating output of the parallel-serial converter and the contents of said price register and unit price register; and means for performing addition a number of times equal to the content of said unit price register including a first counter for counting the number of additions; a zero detector and coincidence circuit for generating a control signal where the least significant digit of said unit price register is zero or where it coincides with the content of said first counter; means for generating a shift signal so as to cause in response to said control signal the contents of said price register and unit price register to be shifted by one place; and a second counter responsive to the shift signal to be counted up to generate a signal to stop addition when the content thereof attains a predetermined value; said first counter being reset by the shift signal and said second counter being reset by a signal obtained according to the digital quantity.
Claim 2
Dependent Claim
270 words
An electronic digital weighing apparatus having means for detecting the weight of an object in the form of an analog quantity; means for converting the analog quantity to a digital quantity; an UP-DOWN counter for counting said digital quantity; a parallel-serial converter for converting the content of said counter in serial form; means for setting the unit price of the object; a unit price register for storing data from said unit price setting means; a price register; means for adding together output of said parallel-serial converter and the content of said price register and having the results of addition stored in said price register; means for digitally indicating output of the parallel-serial converter and the contents of said price register and unit price register; and means for performing addition a number of times equal to the content of said unit price register including a first counter for counting the number of additions; a zero detector and coincidence circuit for generating a control signal where the least significant digit of said unit price register is zero or where it coincides with the content of said first counter; means for generating a shift signal so as to cause in response to said control signal the contents of said price register and unit price register to be shifted by one place; and a second counter responsive to the shift signal to be counted up to generate a signal to stop addition when the content thereof attains a predetermined value; said first counter being reset by the shift signal and said second counter being reset by a signal obtained according to the digital quantity.
Claim 3
Dependent Claim
19 words
A weighing apparatus according to claim 1 wherein output of said parallel-serial converter is stored in a weight register.
Claim 4
Dependent Claim
214 words
A weighing apparatus according to claim 1 wherein means for detecting the weight of the object in the form of an analog quantity and means for converting the analog quantity to a digital quantity comprise a disk having a plurality of slits bored around the periphery so as to make an angular rotation according to the weight of the object; a source of light facing the slitted portion of said disk; a pair of photoelectric conversion elements facing said light source with said slitted portion of the disk interposed therebetween, said a pair of photoelectric conversion elements being positioned in such a manner that when one photoelectric conversion element has its center disposed at the center of the disk slit, the other photoelectric conversion element has its center aligned with the side edge of the same disk slit or that of the adjacent disk slit; a pair of amplifiers for respectively amplifying electrical signals from the paired photoelectric conversion elements; first and second shaping means for shaping the wave forms of outputs from said paired amplifiers; and means for generating count up pulses for causing the UP-DOWN counter to count up according to outputs from the paired shaping means and count down pulses for causing said counter to count down according to said outputs.
Claim 5
Dependent Claim
34 words
A weighing apparatus according to claim 3 wherein the width of the individual slits formed in said disk and a space therebetween are equal to the light receiving surface of said photoelectric conversion elements.
Claim 6
Dependent Claim
148 words
A weighing apparatus according to claim 3 wherein said means for generating count up and count down pulses comprises a first differentiator; a series connection of a first inverter and a second differentiator, said first differentiator and said series connection being connected to said first shaping means; a second inverter connected to said second shaping means; and four AND gates, first AND gate being connected to said first differentiator and said second inverter, second AND gate being connected to said series connection and said second shaping means, third AND gate being connected to said first differentiator and said second shaping means, and fourth AND gate being connected to said series connection and said second inverter, thereby producing said count up pulses by combination of outputs of said first and second AND gates and said count down pulses by combination of outputs of said third and fourth AND gates.
Claim 7
Dependent Claim
221 words
A weighing apparatus according to claim 3 wherein said means for generating count up and count down pulses comprises a first differentiator connected to said first shaping means; a first inverter connected to said first shaping means; a second differentiator connected to said first inverter; a third differentiator connected to said second shaping means; a second inverter connected to said second shaping means; a fourth differentiator connected to said second inverter; and eight AND gates, first AND gate being connected to said first differentiator and said second inverter, second AND gate being connected to said second differentiator and said second inverter, third AND gate being connected to said second differentiator and said second shaping means, fourth AND gate being connected to said first differentiator and said second shaping means, fifth AND gate being connected to said third differentiator and said first shaping means, sixth AND gate being connected to said first shaping means and said fourth differentiator, seventh AND gate being connected to said first inverter and said fourth differentiator, and eighth AND gate being connected to said first inverter and said third differentiator, thereby producing said count up pulses by combination of outputs of said first, third, fifth and seventh AND gates, and said count down pulses by combination of outputs of said second, fourth, sixth and eighth AND gates.
Claim 8
Dependent Claim
74 words
A weighing apparatus according to claim 3 which further includes minute adjusting means for rotating the slitted disk to an extremely small extent so as to bring the center of one of said paired photoelectric conversion elements into alignment with the center of the disk slit; and an indicating means connected to one of said paired amplifiers so as to detect the relative positions of said one photoelectric conversion element and said disk slit.
Claim 9
Dependent Claim
23 words
A weighing apparatus according to claim 3 wherein said paired shaping means are Schmitt circuits at least one of which has hysteresis characteristics.
Claim 10
Dependent Claim
83 words
A weighing apparatus according to claim 1 wherein said UP-DOWN counter comprises means for detecting its zero content; and means, when actuated by output of said detecting means and count up pulse, for cauSing said UP-DOWN counter to count up by count up pulses and count down by count down pulses and when actuated by output from said detecting means and count down pulse, for causing said UP-DOWN counter to count up by count down pulses and count down by count up pulses.
Claim 11
Dependent Claim
50 words
A weighing apparatus according to claim 1 wherein, in case said unit price register has an N number of digits, said second counter generates a read-in instruction when its content is 0, a multiplication instruction when its content is 1, and a multiplication stop instruction when its content is N+1.
Claim 12
Dependent Claim
51 words
A weighing apparatus according to claim 1 wherein said signal generated according to the digital quantity is obtained by supplying said digital quantity to a timer circuit, thereby causing said second counter to be released from its reset condition in a certain length of time after extinguishment of said digital quantity.
Claim 13
Dependent Claim
40 words
A weighing apparatus according to claim 1 which further includes a memory key for preventing said signals generated according to said digital quantity from being conducted to said second counter, thereby enabling the second counter to maintain its predetermined content.
Claim 14
Dependent Claim
51 words
A weighing apparatus according to claim 1 which further includes means for detecting that the content of said UP-DOWN counter originates with error; and means for supplying reset pulses to said UP-DOWN counter in response to output of said detecting means so as to clear the content of said UP-DOWN counter.
Claim 15
Dependent Claim
49 words
A weighing apparatus according to claim 1 which further includes means for clearing the content of said unit price register and that of said UP-DOWN counter when the power source is actuated and for clearing the content of said UP-DOWN counter when the weight of a tare is deducted.
Claim 16
Dependent Claim
44 words
A weighing apparatus according to claim 1 which further includes means for detecting that the content of said UP-DOWN counter represents the weight of a tare; and means for clearing the content of said price register in response to output of said detecting means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |