Patent EP0435113A1 successfully refreshed from Google Patents.
US4072885A
Expired / Lapsed
US
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Control system and method for removal of coke from a coke oven
Assignee: Westinghouse Electric Corp
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Filing: 1975-11-03
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Granted: 1978-02-07
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Expires: 1995-11-03
Abstract
Abstract A method and control apparatus are disclosed for providing incremental position regulation of industrial apparatus, and for synchronizing movement of the apparatus, where an illustration of such industrial apparatus could be a coke transfer hot car, moving along a track at the coke side of a coke oven chamber, in conjunction with the forward advancement of a pusher ram, in the direction of proceeding through a coking chamber from the pusher machine side thereof. The present method and control apparatus are characterized by generating pulses that are encoded to represent actual incremental position displacements of the pusher ram. These pulses are used in a feedback control loop for positioning and speed control for the ram, and the pulses are used by a central controller to produce signal pulses representing the desired displacement for the associated hot coke transfer car. The signal pulses are transmitted to control a drive system for the car, which is additionally controlled by a feedback control loop using car position pulses generated to represent the actual displacement of the car. The car position pulses are also transmitted to the central controller, where the signal pulses to the drive for the car are modified to establish and then maintain a steady-state position lag error and constant speed relationship between the ram and the car. The car position pulses are used in the central controller as a feedback control for permissive continued position advancement of the pusher ram.
Inventors
- 👤 Lawrence W. Emark, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:25
CPC Classifications
C; C10; C10B; C10B41/00
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
146 words
A control system for providing incremental position regulation of a first apparatus in relation to the positional movement of a second apparatus, including the combination of, means for providing a position control signal in accordance with the desired position of said first apparatus, means responsive to said position control signal for providing first signal pulses at a first rate for controlling the actual positonal movement of said first apparatus means responsive to said first signal pulses for providing second signal pulses at a second rate in accordance with the desired positional movement of said second apparatus, means responsive to the actual positional movement of said second apparatus for providing third signal pulses in accordance with said actual positional movement of said second apparatus, and means responsive to said second signal pulses and said third signal pulses for controlling the actual positional movement of said second apparatus.
Claim 2
Dependent Claim
146 words
A control system for providing incremental position regulation of a first apparatus in relation to the positional movement of a second apparatus, including the combination of, means for providing a position control signal in accordance with the desired position of said first apparatus, means responsive to said position control signal for providing first signal pulses at a first rate for controlling the actual positonal movement of said first apparatus means responsive to said first signal pulses for providing second signal pulses at a second rate in accordance with the desired positional movement of said second apparatus, means responsive to the actual positional movement of said second apparatus for providing third signal pulses in accordance with said actual positional movement of said second apparatus, and means responsive to said second signal pulses and said third signal pulses for controlling the actual positional movement of said second apparatus.
Claim 3
Dependent Claim
57 words
The control system of claim 1, including means responsive to the actual positional movement of said first apparatus for providing fourth signal pulses in accordance with the actual positional movement of said first apparatus, and means responsive to said first signal pulses and to said fourth signal pulses for controlling the actual position of said first member.
Claim 4
Dependent Claim
183 words
In a control system for providing incremental position regulation between the movement of a coke transfer car along a track in relation to the coke discharge side of a given coke oven chamber and the movement of a coke pusher advancing through that coke oven chamber from the opposite side thereof the push the coke into said car for providing a substantially uniform layer of coke in said car, said control system comprising: first means for generating first signal pulses at a predetermined pulse rate in accordance with the desired position of said ram, second means responsive to said first signal pulses for producing second signal pulses in accordance with the desired position of said coke transfer car along said track, third means responsive to said second signal pulses for moving said coke transfer car along said track, fourth means for generating third signal pulses in accordance with the actual position of said coke transfer car along said track, and with said third means being responsive to said third signal pulses for modifying the position of said coke transfer car along said track.
Claim 5
Dependent Claim
183 words
In a control system for providing incremental position regulation between the movement of a coke transfer car along a track in relation to the coke discharge side of a given coke oven chamber and the movement of a coke pusher advancing through that coke oven chamber from the opposite side thereof the push the coke into said car for providing a substantially uniform layer of coke in said car, said control system comprising: first means for generating first signal pulses at a predetermined pulse rate in accordance with the desired position of said ram, second means responsive to said first signal pulses for producing second signal pulses in accordance with the desired position of said coke transfer car along said track, third means responsive to said second signal pulses for moving said coke transfer car along said track, fourth means for generating third signal pulses in accordance with the actual position of said coke transfer car along said track, and with said third means being responsive to said third signal pulses for modifying the position of said coke transfer car along said track.
Claim 6
Dependent Claim
34 words
The control system according to claim 3 further comprising means responsive to said first pulses for producing a fourth signal which varies as a function of the actual forwardmost position of said pusher ram.
Claim 7
Dependent Claim
38 words
The control system according to claim 3 further comprising means responsive to said first signal pulses to control advancement of said ram in a forward direction for pushing coke from said oven chamber into said coke transfer car.
Claim 8
Dependent Claim
43 words
The control system according to claim 3 further comprising means controlling the production of said second signal pulses to inhibit movement of said coke transfer car until after a predetermined forward displacement of said ram in a direction toward said coke transfer car.
Claim 9
Dependent Claim
69 words
The control system according to claim 3 further comprising means biasing the response of said third means to said second signal pulses according to a predetermined position lag error signal in a manner that position changes representing the desired actual advancement of said coke transfer car along said track have a predetermined lag behind the actual advancing movement of said ram in the direction toward the coke transfer car.
Claim 10
Dependent Claim
27 words
The control system according to claim 3 further including control means responsive to said first signal pulses for moving said ram relative to said coke transfer car.
Claim 11
Dependent Claim
37 words
The control system according to claim 8 further comprising means for modifying the pulse rate of said first signal pulses to control the speed at which said ram moves in the direction toward said coke transfer car.
Claim 12
Dependent Claim
38 words
The control system according to claim 8 further comprising means for modifying the pulse rate of said first signal pulses to control the speed at which said ram moves in the direction away from said coke transfer car.
Claim 13
Dependent Claim
42 words
The control system according to claim 8 further comprising means for modifying the pulse rate of said first signal pulses to control the speed at which said ram is retracted from said given coke oven chamber following the discharge of coke therefrom.
Claim 14
Dependent Claim
34 words
The control system according to claim 8 further comprising means for modifying said first signal pulses to control the displacement of said ram in response to the actual position of said ram transfer car.
Claim 15
Dependent Claim
44 words
The control system according to claim 3 further comprising means responsive to the difference between the desired position of said ram and the actual position of said ram for inhibiting further positional movement of said ram when said difference exceeds a predetermined position error.
Claim 16
Dependent Claim
40 words
The control system according to claim 3 wherein said first means for generating first signal pulses includes: a pulse generator for producing a train of first signal pulses having a pulse rate responsive to the positional movement of said ram.
Claim 17
Dependent Claim
44 words
The control system of claim 3, including means for producing a pulse output signal indicative of actual positional movement of said ram; and fifth means responsive to said first signal pulses and said pulse output signal for controlling the actual position of said ram.
Claim 18
Dependent Claim
69 words
The control system according to claim 3 with said third means including: a resettable counter responsive to said second signal pulses for producing an electrical signal corresponding to the desired position of said coke transfer car, and means for biasing said electrical signal from said resettable counter to produce output pulses representing a predetermined position lag of said coke transfer car in relation to the position of said ram.
Claim 19
Dependent Claim
38 words
The control system according to claim 3 with said third means including a resettable counter responsive to said second signal pulses and said third signal pulses for controlling the movement of the coke transfer car along said track.
Claim 20
Dependent Claim
56 words
The control system according to claim 3 with said third means for moving said coke transfer car including: a drive motor operative with said transfer car, a speed regulator operative with said drive motor and responsive to said second signal pulses, and means for attenuating the response by said speed regulator to said second signal pulses.
Claim 21
Dependent Claim
119 words
The control system according to claim 3 with said fourth means for generating a third signal including: a pulse generator for producing two trains of phase displaced pulses in response to movement of said coke transfer car along said track, encoder means for modifying said phase displaced pulses for producing two trains of pulses in phase opposition to each other, means responsive to said two trains of pulses in phase opposition for producing a pulse output indicative of the actual movement of said coke transfer car; and means including a timer for receiving said two trains of pulses in phase opposition to produce a pulse output indicative of the displacement direction of said coke transfer car along said track.
Claim 22
Dependent Claim
33 words
The control system according to claim 19 further including: resettable counter means including a logic circuit responsive to the two trains of pulses from said encoder means to generate said third signal pulses.
Claim 23
Dependent Claim
73 words
The control system according to claim 3 further including: a drive motor coupled with said pusher ram for displacing said ram through said given coke oven chamber, resettable counter means including a logic circuit for producing a control signal representing a desired displacement of said ram, a speed regulator responsive to said control signal for controlling said drive motor, and means for attenuating the response by the speed regulator to said control signal.
Claim 24
Dependent Claim
18 words
The control system according to claim 3 including a said speed regulator further responsive to said first pulses.
Claim 25
Independent Claim
129 words
The method of controlling the incremental position regulation of a first apparatus in relation to the positional movement of a second apparatus, including the steps of: providing first control signal pulses at a rate in accordance with the desired positional movement for said first apparatus, controlling the actual movement of said first apparatus in response to said first control signal pulses, providing second control signal pulses in response to said first control signal pulses and in accordance with the desired positional movement of said second apparatus, providing third control signal pulses in response to the actual positional movement of said second apparatus, and controlling the actual movement of said second apparatus in response to at least one of said second control signal pulses and said third control signal pulses.
Claim 26
Independent Claim
129 words
The method of controlling the incremental position regulation of a first apparatus in relation to the positional movement of a second apparatus, including the steps of: providing first control signal pulses at a rate in accordance with the desired positional movement for said first apparatus, controlling the actual movement of said first apparatus in response to said first control signal pulses, providing second control signal pulses in response to said first control signal pulses and in accordance with the desired positional movement of said second apparatus, providing third control signal pulses in response to the actual positional movement of said second apparatus, and controlling the actual movement of said second apparatus in response to at least one of said second control signal pulses and said third control signal pulses.
Claim 27
Independent Claim
189 words
The method of controlling the movement of a coke transfer car along a track at the coke discharge side of a coke oven chamber in a synchronous relation with the movement of a pusher ram to advance through that coke oven chamber from the opposite side thereof to push coke into said car and form a substantially uniform layer of coke therein, said method including the steps of: providing first signal pulses at a predetermined rate for advancing the ram into contact with the coke at one side of the oven chamber and to inhibit the initial movement of said coke transfer car relative to the oven chamber, providing second signal pulses in response to said first signal pulses for advancing the coke transfer car along said track in relation to further advancing movement of said ram through said coke oven chamber, maintaining movement of the car along the track in a position relationship dependent upon continued forward advancement of said ram through said coke oven chamber, and terminating the movement of the car along said track when the ram discontinues said forward advancement through the coke oven chamber.
Claim 28
Independent Claim
189 words
The method of controlling the movement of a coke transfer car along a track at the coke discharge side of a coke oven chamber in a synchronous relation with the movement of a pusher ram to advance through that coke oven chamber from the opposite side thereof to push coke into said car and form a substantially uniform layer of coke therein, said method including the steps of: providing first signal pulses at a predetermined rate for advancing the ram into contact with the coke at one side of the oven chamber and to inhibit the initial movement of said coke transfer car relative to the oven chamber, providing second signal pulses in response to said first signal pulses for advancing the coke transfer car along said track in relation to further advancing movement of said ram through said coke oven chamber, maintaining movement of the car along the track in a position relationship dependent upon continued forward advancement of said ram through said coke oven chamber, and terminating the movement of the car along said track when the ram discontinues said forward advancement through the coke oven chamber.
Claim 29
Dependent Claim
49 words
The method of claim 24 including the further step of: controlling the movement of said car along the track in response to said second signal pulses to maintain a predetermined position error in relation to the desired displacement of said car and proportional to the speed of said car.
Claim 30
Dependent Claim
53 words
The method of claim 24 including the further step of: controlling the forward advancement movement of said ram through said coke oven chamber in response to said first signal pulses to maintain a predetermined position error in relation to the desired continued advancement of said ram and proportional to the said ram speed.
Claim 31
Dependent Claim
41 words
The method of claim 24 including the step of maintaining a predetermined position lag error of said coke transfer car in response to said second signal pulses and in relation to forward advancement movement of said ram through the oven chamber.
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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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |