US3814914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic dry coke weight system
Assignee: Bethlehem Steel Corp
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Filing: 1973-06-05
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Granted: 1974-06-04
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Expires: 1993-06-05
Abstract
Abstract An analog electrical system utilizes a signal from a coke weighing system and a signal from a coke moisture gauge to correct for prior errors in hopper weighings due to delivery overshoot as well as moisture variations in prior batches of coke.
Inventors
- 👤 H List
- 👤 J Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/58; G01; G01G; G01G13/00; G01G13/02; G01G13/24; G01G13/28; G01G23/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
Apparatus for automatically measuring and controlling the net dry weight of discrete quantities of moisture-containing material, comprising: a. means for producing a first signal indicative of the actual weight of each discrete quantity of material; b. means for producing a second signal indicative of the moisture content of said material; c. means for producing a third signal indicative of the target dry weight for each weighing of said material; d. means adapted to receive said first, second and third signals and compute and store a fourth signal indicative of the target dry weight, plus the difference between said target dry weight and the actual dry weight of the instant weighing, plus the error in dry weight existing after the next preceding weighing; e. means adapted to receive said second signal and said fourth signal and compute and store a fifth signal indicative of the actual desired weight for the next weighing; f. timing means for controlling when said fourth and fifth signals are computed and stored; and g. means for shutting off the supply of said material to said next weighing when said first signal equals said fifth signal.
Claim 2
Dependent Claim
189 words
Apparatus for automatically measuring and controlling the net dry weight of discrete quantities of moisture-containing material, comprising: a. means for producing a first signal indicative of the actual weight of each discrete quantity of material; b. means for producing a second signal indicative of the moisture content of said material; c. means for producing a third signal indicative of the target dry weight for each weighing of said material; d. means adapted to receive said first, second and third signals and compute and store a fourth signal indicative of the target dry weight, plus the difference between said target dry weight and the actual dry weight of the instant weighing, plus the error in dry weight existing after the next preceding weighing; e. means adapted to receive said second signal and said fourth signal and compute and store a fifth signal indicative of the actual desired weight for the next weighing; f. timing means for controlling when said fourth and fifth signals are computed and stored; and g. means for shutting off the supply of said material to said next weighing when said first signal equals said fifth signal.
Claim 3
Dependent Claim
105 words
Apparatus as recited in claim 1, in which means (d) comprises: i. means for converting said first signal into an adjusted signal indicative of the actual dry weight of the instant weighing; ii. means for summing said third signal, said adjusted signal, and a signal indicative of the error in dry weight existing after the next preceding weighing; iii. means adapted to sample the signal from means (ii) during a compute period and to store said signal during all other periods; and iv. means adapted to store the output of means (iii) during said compute period and to sample said output during all other periods.
References Cited (Backward Citations)
US3477529A
Cited
US3502162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |