US4027171A — Power demand limiting system

Claim 1

Independent Claim 70 words

A power demand limiting system for limiting peak power demand of a space conditioning load adapted to be coupled with an electric utility power supply through space temperature responsive switching means comprising, in combination, timer means for cyclically coupling and uncoupling the space conditioning load with said electric utility power supply through the space temperature responsive switching means, and timer control means for selectively energizing and deenergizing said timer means.

Claim 2

Dependent Claim 70 words

A power demand limiting system for limiting peak power demand of a space conditioning load adapted to be coupled with an electric utility power supply through space temperature responsive switching means comprising, in combination, timer means for cyclically coupling and uncoupling the space conditioning load with said electric utility power supply through the space temperature responsive switching means, and timer control means for selectively energizing and deenergizing said timer means.

Claim 3

Dependent Claim 18 words

A power demand limiting system in accordance with claim 1 wherein said timer control means comprises a thermostat.

Claim 4

Dependent Claim 19 words

A power demand limiting system in accordance with claim 1 wherein said timer control means comprises radio receiver means.

Claim 5

Dependent Claim 22 words

A power demand limiting system in accordance with claim 1 wherein said timer control means comprises power transmission line ripple sensing means.

Claim 6

Dependent Claim 59 words

A power demand limiting system for limiting peak power demand of a space conditioning load adapted to control the temperature of a designated space comprising a first thermostatic switch operatively responsive to the temperature of air within the designated space in series circuit with a second thermostatic switch operatively responsive to the temperature of air outside the designated space.

Claim 7

Dependent Claim 59 words

A power demand limiting system for limiting peak power demand of a space conditioning load adapted to control the temperature of a designated space comprising a first thermostatic switch operatively responsive to the temperature of air within the designated space in series circuit with a second thermostatic switch operatively responsive to the temperature of air outside the designated space.

Claim 8

Dependent Claim 29 words

A power demand limiting system in accordance with claim 5 wherein said first and second thermostatic switches are in series circuit with an air conditioning system energizing relay coil.

Claim 9

Dependent Claim 76 words

A power demand limiting system for limiting peak power demand of a space conditioning load comprising circuit means for alternatively coupling the space conditioning load with an electric utility power supply through a thermostatic switch operatively responsive to the temperature of air within the conditioned space, and through both said thermostatic switch and a time cycling switch that includes an actuator driven by a motor coupled with the electric utility power supply through said thermostatic switch.

Claim 10

Dependent Claim 76 words

A power demand limiting system for limiting peak power demand of a space conditioning load comprising circuit means for alternatively coupling the space conditioning load with an electric utility power supply through a thermostatic switch operatively responsive to the temperature of air within the conditioned space, and through both said thermostatic switch and a time cycling switch that includes an actuator driven by a motor coupled with the electric utility power supply through said thermostatic switch.

Claim 11

Dependent Claim 27 words

A power demand limiting system in accordance with claim 7 wherein said circuit means further includes a double throw switch in series circuit with said thermostatic switch.

Claim 12

Dependent Claim 29 words

A power demand limiting system in accordance with claim 8 further comprising means responsive to the temperature of air without the conditioned space for actuating said double throw switch.

Claim 13

Dependent Claim 58 words

A power demand limiting system for limiting peak power demand of a space conditioning load comprising, in combination, space conditioning load energizing means coupled with a source of electric power serially through a thermostatic switch operatively responsive to the temperature of the conditioned space, a double throw switch controlled by switch actuating means, and a time cycling switch.

Claim 14

Dependent Claim 58 words

A power demand limiting system for limiting peak power demand of a space conditioning load comprising, in combination, space conditioning load energizing means coupled with a source of electric power serially through a thermostatic switch operatively responsive to the temperature of the conditioned space, a double throw switch controlled by switch actuating means, and a time cycling switch.

Claim 15

Dependent Claim 25 words

A power demand limiting system in accordance with claim 10 further comprising conductor means connected with said double throw switch across said time cycling switch.

Claim 16

Dependent Claim 38 words

A power demand limiting system in accordance with claim 10 wherein said time cycling switch includes a motor adapted to be coupled with said source of electric power serially through said thermostatic switch and said double throw switch.

Claim 17

Dependent Claim 33 words

A power demand limiting system in accordance with claim 10 wherein said switch actuating means includes a second thermostatic switch operatively responsive to the temperature of ambient air external to the conditioned space.

Claim 18

Dependent Claim 20 words

A power demand limiting system in accordance with claim 10 wherein said switch actuating means includes a radio wave receiver.

Claim 19

Dependent Claim 22 words

A power demand limiting system in accordance with claim 10 wherein said switch actuating means includes a power transmission line ripple sensor.

Claim 20

Independent Claim 98 words

A method of limiting power demand of a space conditioning load adapted to be coupled with an electric utility power supply by the positioning of a space temperature sensitive thermostatic switch in an on position, said method comprising the steps of coupling the space conditioning load continuously with the electric utility power supply when the thermostatic switch is in the on position during periods of relatively low power demand, and coupling the space conditioning load intermittently with the electric utility power supply when the thermostatic switch is in the on position during periods of relatively high power demand.

Claim 21

Independent Claim 98 words

A method of limiting power demand of a space conditioning load adapted to be coupled with an electric utility power supply by the positioning of a space temperature sensitive thermostatic switch in an on position, said method comprising the steps of coupling the space conditioning load continuously with the electric utility power supply when the thermostatic switch is in the on position during periods of relatively low power demand, and coupling the space conditioning load intermittently with the electric utility power supply when the thermostatic switch is in the on position during periods of relatively high power demand.

Claim 22

Dependent Claim 39 words

A method of limiting power demand in accordance with claim 16 wherein the periods of relatively high power demand and the periods of relatively low power demand are differentiated by sensing the temperature of ambient air external the space.

Claim 23

Dependent Claim 35 words

A method of limiting power demand in accordance with claim 16 wherein the periods of relatively high power demand and the periods of relatively low power demand are differentiated by power transmission line ripple signals.

Claim 24

Dependent Claim 32 words

A method of limiting power demand in accordance with claim 16 wherein the periods of relatively high power demand and the periods of relatively low power demand are differentiated by radiowave signals.

Claim 25

Independent Claim 84 words

A method of limiting power demand of a space conditioning load comprising the steps of coupling the space conditioning load with an electric utility power supply through thermostatic switch means responsive to the temperature of air within the space during a first set of time spaced intervals, and coupling the space conditioning load with the electric utility power supply through the thermostatic switch and through a time cycling switch during a second set of time intervals time spaced by the first set of intervals.

Claim 26

Independent Claim 84 words

A method of limiting power demand of a space conditioning load comprising the steps of coupling the space conditioning load with an electric utility power supply through thermostatic switch means responsive to the temperature of air within the space during a first set of time spaced intervals, and coupling the space conditioning load with the electric utility power supply through the thermostatic switch and through a time cycling switch during a second set of time intervals time spaced by the first set of intervals.

Claim 27

Dependent Claim 32 words

A method of limiting power demand in accordance with claim 20 wherein the first and second sets of time intervals are differentiated by sensing the temperature of ambient air external the space.

Claim 28

Dependent Claim 28 words

A method of limiting power demand in accordance with claim 20 wherein the first and second sets of time intervals are differentiated by power transmission line ripple signals.

Claim 29

Dependent Claim 25 words

A method of limiting power demand in accordance with claim 20 wherein the first and second sets of time intervals are differentiated by radio signals.

Claim 30

Independent Claim 80 words

A method of limiting power demand of a plurality of space conditioning loads adapted to be coupled with an electric utility power supply comprising the step of interposing a space temperature responsive switching means including a timer means and timer control means for selectively energizing and deenergizing said timer means between each of said loads and said power supply during periods of relatively high power demand to provide the unsynchronous, cyclical coupling and uncoupling of said loads with said supply.

Claim 31

Independent Claim 80 words

A method of limiting power demand of a plurality of space conditioning loads adapted to be coupled with an electric utility power supply comprising the step of interposing a space temperature responsive switching means including a timer means and timer control means for selectively energizing and deenergizing said timer means between each of said loads and said power supply during periods of relatively high power demand to provide the unsynchronous, cyclical coupling and uncoupling of said loads with said supply.

Claim 32

Dependent Claim 19 words

A method of limiting power demand in accordance with claim 24 wherein said timer control means comprises a thermostat.

Claim 33

Dependent Claim 73 words

A power demand limiting system for limiting peak power demand of a plurality of space conditioning loads adapted to be coupled with an electric utility power supply through space temperature responsive switching means comprising, are in combination, timer means for cyclically coupling and uncoupling each of said loads with said power supply through said switching means, and timer control means for the selective, unsynchronous energizing and deenergizing of each of said timer means.

Claim 34

Dependent Claim 73 words

A power demand limiting system for limiting peak power demand of a plurality of space conditioning loads adapted to be coupled with an electric utility power supply through space temperature responsive switching means comprising, are in combination, timer means for cyclically coupling and uncoupling each of said loads with said power supply through said switching means, and timer control means for the selective, unsynchronous energizing and deenergizing of each of said timer means.

Claim 35

Dependent Claim 18 words

A power demand limiting system in accordance with claim 26 wherein said timer control means comprises a thermostat.

Claim 36

Independent Claim 102 words

A method of limiting the peak electrical power demand of a residential user having an air conditioning unit connected in an electrical power supply, comprising the steps of monitoring the temperature of the ambient air outside the residence and the temperature inside the residence and in response to both the outside monitored temperature exceeding a first preselected value and the temperature inside the residence exceeding a second preselected value, cyclically coupling and uncoupling the air conditioning unit with the electrical power supply on a timed, repetitive basis until the temperature of the ambient air outside the residence drops below the preselected value.

Claim 37

Independent Claim 102 words

A method of limiting the peak electrical power demand of a residential user having an air conditioning unit connected in an electrical power supply, comprising the steps of monitoring the temperature of the ambient air outside the residence and the temperature inside the residence and in response to both the outside monitored temperature exceeding a first preselected value and the temperature inside the residence exceeding a second preselected value, cyclically coupling and uncoupling the air conditioning unit with the electrical power supply on a timed, repetitive basis until the temperature of the ambient air outside the residence drops below the preselected value.

Claim 38

Independent Claim 109 words

The method of limiting peak electrical power cumulatively demanded by the air conditioning units associated with a plurality of consumer spaces serviced in common by an electrical power network, which comprises the steps of: (a) sensing the ambient temperatures associated with the locations of groups of said consumer spaces; (b) cyclically disconnecting the air conditioning units of those groups of consumer spaces with which the temperatures sensed in step (a) exceed a predetermined value; and (c) asynchronously controlling the cyclings of step (b) whereby the aggregate demand placed upon the electrical power network is materially reduced while still maintaining the temperatures within said consumer spaces at a tolerable level.

Claim 39

Independent Claim 109 words

The method of limiting peak electrical power cumulatively demanded by the air conditioning units associated with a plurality of consumer spaces serviced in common by an electrical power network, which comprises the steps of: (a) sensing the ambient temperatures associated with the locations of groups of said consumer spaces; (b) cyclically disconnecting the air conditioning units of those groups of consumer spaces with which the temperatures sensed in step (a) exceed a predetermined value; and (c) asynchronously controlling the cyclings of step (b) whereby the aggregate demand placed upon the electrical power network is materially reduced while still maintaining the temperatures within said consumer spaces at a tolerable level.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-05-30	1980-11-29	1981-05-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-05-30	1984-11-29	1985-05-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-05-30	1988-11-29	1989-05-31	$7700.00	Window Closed / Lapsed

Power demand limiting system

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