US3777828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic weighing system with digital readout
Assignee: Reliance Electric Co
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Filing: 1971-09-30
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Granted: 1973-12-11
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Expires: 1991-09-30
Abstract
Abstract An improved electronic weighing system with a digital readout. A transducer establishes an analog signal corresponding to an unknown weight. The analog signal is amplified, digitized with an analog-to-digital converter and applied to the digital readout. Circuitry is provided for automatically zeroing the analog portion of the system while the transducer output is momentarily interrupted and for filling gaps in the analog signal resulting from the interruption of the transducer output. The digital portion of the system also includes tare weight provisions for modifying the indicated weight, and circuitry for changing the range and the resolution or increment of the weighing system.
Inventors
- 👤 S Dietemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:01
CPC Classifications
G; G01; G01G; G01G3/00; G01G3/12; G01G3/14; G01G3/142; G01G3/147; Y; Y10; Y10S; Y10S177/00; Y10S177/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
In an electronic weighing system which generates a pulse train having a number of pulses proportional to the weight on a transducer, a digital output circuit comprising a counter, means for storing tare weight as an initial count in said counter, means responsive to pulses in the pulse train for counting said counter down towards zero, means responsive to a count of zero for causing any remaining pulses in the pulse train to count said counter up, and means for reading out the contents of said counter after counting the pulses in the pulse train.
Claim 2
Dependent Claim
95 words
In an electronic weighing system which generates a pulse train having a number of pulses proportional to the weight on a transducer, a digital output circuit comprising a counter, means for storing tare weight as an initial count in said counter, means responsive to pulses in the pulse train for counting said counter down towards zero, means responsive to a count of zero for causing any remaining pulses in the pulse train to count said counter up, and means for reading out the contents of said counter after counting the pulses in the pulse train.
Claim 3
Dependent Claim
72 words
In an electronic weighing system which generates a pulse train having a number of pulses proportional to the weight on a transducer, a digital output circuit, as defined in claim 1, wherein said readout means includes a storage register, means for transferring the contents of said counter to said storage register after counting the pulses in the pulse train, and a digital readout device for indicating the contents of said storage register.
Claim 4
Dependent Claim
56 words
In an electronic weighing system which generates a pulse train having a number of pulses proportional to the weight on a transducer, a digital output circuit, as defined in claim 1, wherein said means for storing an initial count in said counter stores in said counter a count corresponding to a tare weight on the transducer.
Claim 5
Dependent Claim
60 words
In an electronic weighing system which generates a pulse train having a number of pulses proportional to the weight on a transducer, a digital output circuit, as defined in claim 1, and including means for changing the number of pulses in the pulse train by a predetermined factor whereby the range of the weighing system is changed by such factor.
Claim 6
Dependent Claim
35 words
In an electronic weighing system as defined in claim 1, having means for modifying the pulse count by a predetermined factor for changing the range and increment of the weighing system by such predetermined factor.
Claim 7
Dependent Claim
31 words
An electric weighing system, as defined in claim 6, wherein said modifying means includes a pulse divider for dividing the number of pulses in the pulse train by the predetermined factor.
Claim 8
Dependent Claim
31 words
An electronic weighing system, as defined in claim 5, wherein said modifying means includes a pulse multiplier for multiplying the number of pulses in the pulse train by the predetermined factor.
Claim 9
Dependent Claim
63 words
An electronic weighing system, as defined in claim 5, wherein said modifying means includes a pulse divider, a pulse multiplier, and means connecting said pulse divider and said pulse multiplier in series between said pulse train generating means and said counter whereby said pulse divider and said pulse multiplier jointly modify the number of pulses in the pulse train by the predetermined factor.
Claim 10
Dependent Claim
110 words
In an electronic weighing system including apparatus for generating a pulse train having a pulse count corresponding to the gross weight of an object being weighed, a method for modifying the pulse count to obtain a net weight comprising the steps of storing a tare weight count in a counter, counting said counter down from the tare weight count with at least a portion of the pulses in the pulse train, detecting when said counter is counted to a predetermined minimum count, and counting said counter up from such predetermined minium count with any remaining pulses in the pulse train to obtain a final pulse count corresponding to net weight.
Claim 11
Dependent Claim
110 words
In an electronic weighing system including apparatus for generating a pulse train having a pulse count corresponding to the gross weight of an object being weighed, a method for modifying the pulse count to obtain a net weight comprising the steps of storing a tare weight count in a counter, counting said counter down from the tare weight count with at least a portion of the pulses in the pulse train, detecting when said counter is counted to a predetermined minimum count, and counting said counter up from such predetermined minium count with any remaining pulses in the pulse train to obtain a final pulse count corresponding to net weight.
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |