Patent US4147296A successfully refreshed from Google Patents.
US4147296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional demand limit controller
Assignee: Honeywell Inc
•
Filing: 1977-12-09
•
Granted: 1979-04-03
•
Expires: 1997-12-09
Abstract
Abstract In a system for limiting power consumption during peak power consuming periods, a proportional demand limit controller is disclosed having a condition sensor for sensing the condition of air being supplied to a space, a reset circuit responsive to the condition sensor for controlling a load connected thereto for in turn controlling the condition of the air being supplied to the space, and a proportional demand controller for sensing load consumption of the loads within a building and for resetting the reset circuit in a manner to maintain the power consumption of the building loads below a predetermined demand limit.
Inventors
- 👤 Donald H. Spethmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; H; H02; H02J; H02J3/00; H02J3/12; H02J3/14; H02J2105/00; H02J2105/50; H02J2105/52; H02J2105/53; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222; Y04S20/242; Y04S20/244
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
165 words
An apparatus for limiting the power consumption of a building's loads below a predetermined demand limit, at least one of said loads controlling the condition of air within a building, said apparatus comprising at least: condition sensing means for providing a first output dependent upon a condition of said air; load control means adapted to control said at least one of said loads in accordance with the condition being sensed; proportional demand controller means for sensing power consumption of said loads and for providing a second output dependent upon the approach of said power consumption to the predetermined demand limit; and, reset means connected to said condition sensing means for receiving said first output, connected to said proportional demand controller means for receiving said second output, and connected to said load control means, said reset means controlling said load control means in accordance with said first output, said second output resetting said load control means to maintain said power consumption below said predetermined demand limit.
Claim 2
Independent Claim
165 words
An apparatus for limiting the power consumption of a building's loads below a predetermined demand limit, at least one of said loads controlling the condition of air within a building, said apparatus comprising at least: condition sensing means for providing a first output dependent upon a condition of said air; load control means adapted to control said at least one of said loads in accordance with the condition being sensed; proportional demand controller means for sensing power consumption of said loads and for providing a second output dependent upon the approach of said power consumption to the predetermined demand limit; and, reset means connected to said condition sensing means for receiving said first output, connected to said proportional demand controller means for receiving said second output, and connected to said load control means, said reset means controlling said load control means in accordance with said first output, said second output resetting said load control means to maintain said power consumption below said predetermined demand limit.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 wherein said proportional demand controller means comprises a current transformer for sensing the current supply to the loads of the building.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 wherein said proportional demand controller means further comprises an output means connected to said current transformer for generating said second output.
Claim 5
Dependent Claim
55 words
The apparatus of claim 3 wherein said output means comprises a coil connected to said current transformer, a flapper operated by said coil, nozzle means having a pressure therein dependent upon the position of said flapper with respect to said nozzle means, and connecting means connected to said nozzle means for supplying said second output.
Claim 6
Dependent Claim
106 words
The apparatus of claim 4 wherein said reset means comprises a housing having a chamber of a first circumference connected to said connecting means and having a passageway, of a second circumference less than said first circumference, a tube extending into said passgeway forming a restrictive passage having a pressure gradient therealong, said tube having an orifice for picking off a pressure along said pressure gradient, an output port connected to said tube to receive said pressure and connected to said load control means, an actuator connected to said tube to position said orifice along said passageway, said actuator being connected to said condition sensing means.
Claim 7
Dependent Claim
22 words
The apparatus in claim 5 wherein said load control means comprises a valve connected to said output port for controlling said load.
Claim 8
Dependent Claim
30 words
The apparatus in claim 6 wherein said condition sensing means comprises a temperature sensor for sensing the temperature of said air and connected to said actuator of said reset means.
Claim 9
Dependent Claim
108 words
The appartus of claim 1 wherein said reset means comprises a housing having a chamber of a first circumference connected to said proportional demand controller means and having a passageway, of a second circumference less than said first circumference, a tube extending into said passageway forming a restrictive passage having a pressure gradient therealong, said tube having an orifice for picking off a pressure along said pressure gradient, an output port connected to said tube to receive said pressure and connected to said load control means, an actuator connected to said tube to position said orifice along said passageway, said actuator being connected to said condition sensing means.
Claim 10
Dependent Claim
22 words
The apparatus in claim 8 wherein said load control means comprises a valve connected to said output port for controlling said load.
Claim 11
Dependent Claim
30 words
The apparatus in claim 9 wherein said condition sensing means comprises a temperature sensor for sensing the temperature of said space and connected to said actuator of said reset means.
Claim 12
Independent Claim
223 words
An apparatus for limiting the power consumption of a building's loads below a predetermined demand limit, at least first and second loads of said building's loads controlling the condition of respective first and second bodies of air within a building, said apparatus comprising at least: first and second condition sensing means for providing corresponding first and second outputs dependent upon a condition of said respective first and second bodies of air; first and second load control means adapted to control said respective first and second loads in accordance with the condition of said respective first and second bodies of air; proportional demand controller means for sensing power consumption of said building's loads and for providing a third output dependent upon the approach of said power consumption to the predetermined demand limit; and, first and second reset means connected to said respective first and second condition sensing means for receiving said respective first and second outputs, connected to said proportional demand controller means for receiving said third output, and connected to said respective first and second load control means, said first and second reset means controlling said respective first and second load control means in accordance with said respective first and second outputs, said third output resetting said first and second load control means to maintain said power consumption below said predetermined demand limit.
Claim 13
Independent Claim
223 words
An apparatus for limiting the power consumption of a building's loads below a predetermined demand limit, at least first and second loads of said building's loads controlling the condition of respective first and second bodies of air within a building, said apparatus comprising at least: first and second condition sensing means for providing corresponding first and second outputs dependent upon a condition of said respective first and second bodies of air; first and second load control means adapted to control said respective first and second loads in accordance with the condition of said respective first and second bodies of air; proportional demand controller means for sensing power consumption of said building's loads and for providing a third output dependent upon the approach of said power consumption to the predetermined demand limit; and, first and second reset means connected to said respective first and second condition sensing means for receiving said respective first and second outputs, connected to said proportional demand controller means for receiving said third output, and connected to said respective first and second load control means, said first and second reset means controlling said respective first and second load control means in accordance with said respective first and second outputs, said third output resetting said first and second load control means to maintain said power consumption below said predetermined demand limit.
Claim 14
Dependent Claim
24 words
The apparatus of claim 11 wherein said proportional demand controller means comprises a current transformer for sensing the current supply to the building's loads.
Claim 15
Dependent Claim
26 words
The apparatus of claim 13 wherein said proportional demand controller means further comprises an output means connected to said current transformer for generating said third output.
Claim 16
Dependent Claim
55 words
The apparatus of claim 13 wherein said output means comprises a coil connected to said current transformer, a flapper operated by said coil, nozzle means having a pressure therein dependent upon the position of said flapper with respect to said nozzle means, and connecting means connected to said nozzle means for supplying said third output.
Claim 17
Dependent Claim
119 words
The apparatus of claim 14 wherein each of said first and second reset means comprises a housing having a chamber of a first circumference connected to said connecting means and having a passageway, of a second circumference less than said first circumference, a tube extending into said passageway forming a restrictive passage having a pressure gradient therealong, said tube having an orifice for picking off a pressure along said pressure gradient, an output port connected to said tube to receive said pressure and connected to said respective first and second load control means, an actuator connected to said tube to position said orifice along said passageway, said actuator being connected to said respective first and second condition sensing means.
Claim 18
Dependent Claim
36 words
The apparatus in claim 15 wherein said first and second load control means each comprises a valve connected to said respective output port of said respective reset means for controlling said respective first and second loads.
Claim 19
Dependent Claim
45 words
The apparatus in claim 16 wherein said first and second condition sensing means each comprises a temperature sensor for sensing the temperature of said respective first and second bodies of air and connected to said respective actuator of said respective first and second reset means.
Claim 20
Dependent Claim
119 words
The apparatus of claim 11 wherein said each of first and second reset means comprises a housing having a chamber of a first circumference connected to said connecting means and having a passageway, of a second circumference less than said first circumference, a tube extending into said passageway forming a restrictive passage having a pressure gradient therealong, said tube having an orifice for picking off a pressure along said pressure gradient, an output port connected to said tube to receive said pressure and connected to said respective first and second load control means, an actuator connected to said tube to position said orifice along said passageway, said actuator being connected to said respective first and second condition sensing means.
Claim 21
Dependent Claim
39 words
The apparatus in claim 18 wherein said first and second load control means each comprises a valve connected to said respective output port of said respective first and second reset means for controlling said respective first and second loads.
Claim 22
Dependent Claim
45 words
The apparatus in claim 19 wherein said first and second condition sensing means each comprises a temperature sensor for sensing the temperature of said respective first and second bodies of air and connected to said respective actuator of said respective first and second reset means.
References Cited (Backward Citations)
USRE17851E
Cited
US2789197A
Cited
US2874310A
Cited
US3077542A
Cited
US3296452A
Cited
US3291998A
Cited
US3423598A
Cited
US3708684A
Cited
US3858110A
Cited
US3767894A
Cited
US3901308A
Cited
US4027171A
Cited
US4020358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |