US3846706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Simon Carves Chemical Engineering Ltd
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Filing: 1973-03-05
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Granted: 1974-11-05
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Expires: 1993-03-05
Abstract
Abstract A computerized control system for a group of control devices comprises a plurality of combinations of control elements each including a set/hold amplifier receiving repeatedly from the computer a plurality of consecutive analogue signals quantifying the required settings for the control devices, a pneumatic line the pressure in which is determined by a current to pressure converter that senses the amplifier output, a plurality of pressure responsive valve setting devices each connected to the pneumatic line via a normally closed valve and operatively connected to one of the control devices, and valve actuators controlled by the computer for opening each valve to connect its respective assocaited setting device with the pneumatic line during each of the successive periods when the current to pressure converter is receiving an analogue signal quantifying the required setting by the control device associated with the respective associated setting means.
Inventors
- 👤 A Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:39
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/44; G05B11/58; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A control system for regulating cyclically a group of individual control devices comprising a signal generating programming station (c), at least one combination of control elements including a set/hold amplifier (S/H) connected to receive repeatedly from said station a plurality of consecutive analogue signals quantifying the required settings for the respective control devices, a pneumatic pressure line (p), a current to pressure converter (IP) connected to sense the output from said amplifier and act in response thereto to control the pressure in said pneumatic line, a plurality of pneumatic pressure responsive setting devices (A) each connected to said pneumatic line via a normally closed valve (X), each of said pressure responsive setting devices being operatively connected to one of the control devices, and actuators (at X) connected to be operated from said station for opening each of said valves to connect its respective associated setting means with said pneumatic line during each of the successive periods when the current to pressure converter is receiving an analogue signal quantifying the required setting by the control device associated with said respective associated setting device.
Claim 2
Dependent Claim
182 words
A control system for regulating cyclically a group of individual control devices comprising a signal generating programming station (c), at least one combination of control elements including a set/hold amplifier (S/H) connected to receive repeatedly from said station a plurality of consecutive analogue signals quantifying the required settings for the respective control devices, a pneumatic pressure line (p), a current to pressure converter (IP) connected to sense the output from said amplifier and act in response thereto to control the pressure in said pneumatic line, a plurality of pneumatic pressure responsive setting devices (A) each connected to said pneumatic line via a normally closed valve (X), each of said pressure responsive setting devices being operatively connected to one of the control devices, and actuators (at X) connected to be operated from said station for opening each of said valves to connect its respective associated setting means with said pneumatic line during each of the successive periods when the current to pressure converter is receiving an analogue signal quantifying the required setting by the control device associated with said respective associated setting device.
Claim 3
Dependent Claim
94 words
A control system according to claim 1 further comprising a plurality of additional combinations of control elements each combination being associated with a different group of control devices, said station comprising an analogue signal generating source, switch means connecting said combinations of control elements to said source so that said combinations of control eleMents receive said analogue signals from said source, the switch means being operated in such a manner that consecutive analogue signals generated by said source are fed to the plurality of combinations of control elements in accordance with a predetermined sequence.
Claim 4
Dependent Claim
25 words
A control system according to claim 2 wherein consecutive signals generated by said source are fed to each of said combinations of control elements turn.
Claim 5
Dependent Claim
71 words
A control system according to claim 1 in which the analogue signals fed to a combination of control elements are derived, via a digital to analogue converter, from a station that comprises a computer connected to repeatedly and rapidly sense in turn each of a plurality of conditions determined by the setting of said control devices, and programmed to give output digital signals quantifying the required setting for those control devices.
Claim 6
Dependent Claim
70 words
A control system according to claim 2, in which the analogue signals fed to each combination of control elements are derived, via a digital to analogue converter, from a station comprising a computer connected to repeatedly and rapidly sense in turn each of a plurality of conditions determined by the setting of said control devices, and programmed to give output digital signals quantifying the required setting for those control devices.
Claim 7
Dependent Claim
70 words
A control system according to claim 3, in which the analogue signals fed to each combination of control elements are derived, via a digital to analogue converter, from a station comprising a computer connected to repeatedly and rapidly sense in turn each of a plurality of conditions determined by the setting of said control devices, and programmed to give output digital signals quantifying the required setting for those control devices.
Claim 8
Dependent Claim
15 words
A control system according to claim 1, in which said valves are solenoid operated valves.
Claim 9
Dependent Claim
28 words
A control system according to claim 1, in which the pressure responsive setting means for each control device is connected with the pneumatic line via a booster relay.
Claim 10
Dependent Claim
28 words
A control system according to claim 6, in which the pressure responsive setting means for each control device is connected with the pneumatic line via a booster relay.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |