US3789202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counting balance
Assignee: Yamato Scale Co Ltd
•
Filing: 1972-08-23
•
Granted: 1974-01-29
•
Expires: 1992-08-23
Abstract
Abstract A counting balance having means for producing a first voltage proportional to the weight of an unknown number of articles, means for producing a voltage proportional to the weight of a known number of articles, comparing said voltages and producing a train of pulses having a frequency proportional to the ratio of said voltages and then counting the number of pulses during a predetermined interval to determine the number of said unknown articles.
Inventors
- 👤 M Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G23/37; G01G19/00; G01G19/40; G01G19/42; G01G7/00; G01G7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A counting balance comprising means for weighing a single article and generating a negative voltage having a magnitude proportional to the weight of said article, means for weighing an aggregation of the same articles and generating a positive voltage having a magnitude proportional to the total weight of said aggregation of the same articles but less than that of said negative voltage, an adder integrator provided with a normally closed gate and having a first input for directly receiving said positive voltage and a second input for receiving said negative voltage through said gate, a comparator for comparing the output of said adder integrator with a predetermined reference level and generating a signal when the magnitude of said output exceeds said reference level, means for generating a pulse having a predetermined duration in response to said signal, said pulse being applied to the control terminal of said gate for opening said gate for said duration, whereby the output of said adder integrator repeatedly decreases and increases across said reference level and said pulse generating means proDuces a train of pulses, means for counting the number of said pulses appearing within a predetermined time interval, and an indicator for indicating said number of pulses.
Claim 2
Dependent Claim
203 words
A counting balance comprising means for weighing a single article and generating a negative voltage having a magnitude proportional to the weight of said article, means for weighing an aggregation of the same articles and generating a positive voltage having a magnitude proportional to the total weight of said aggregation of the same articles but less than that of said negative voltage, an adder integrator provided with a normally closed gate and having a first input for directly receiving said positive voltage and a second input for receiving said negative voltage through said gate, a comparator for comparing the output of said adder integrator with a predetermined reference level and generating a signal when the magnitude of said output exceeds said reference level, means for generating a pulse having a predetermined duration in response to said signal, said pulse being applied to the control terminal of said gate for opening said gate for said duration, whereby the output of said adder integrator repeatedly decreases and increases across said reference level and said pulse generating means proDuces a train of pulses, means for counting the number of said pulses appearing within a predetermined time interval, and an indicator for indicating said number of pulses.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |