1. A warp-stretch woven fabric selected from the group consisting of plain, twill and satin construction, comprising:
a plurality of weft yarns and a plurality of warp yarns, wherein from about 15 to about 55 weight percent of the warp yarns are polyester bicomponent continuous filaments comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) and having an after-heat-set crimp contraction value from about 20% to about 80%.
2. The fabric according to claim 1, wherein from about 22 to about 33 weight percent of the warp yarns are polyester bicomponent continuous filaments.
3. The fabric according to claim 1, wherein the bicomponent continuous filament warp yarns are woven separately from other warp yarns in the woven fabric construction.
4. The fabric according to claim 1, wherein the weft yarns comprise a first yarn and a second yarn, and wherein the first yarn comprises bicomponent continuous filaments of poly(ethylene terephthalate) and poly(trimethylene terephthalate).
5. The fabric of claim 4, wherein the weft has a construction selected from the group consisting of pick-and-pick and co-insertion.
6. The fabric of claim 4, wherein the second yarn is a spun staple yarn.
7. The fabric of claim 1, wherein the fabric has a warp yarn repeating pattern selected to be most uniform for the weight percent of polyester bicomponent filament warp yarns present.
8. The fabric of claim 1, comprising from about 13 weight percent to about 28 weight percent polyester bicomponent yarns, based on total fabric weight, wherein the bicomponent yarns are present only in the warp.
9. The fabric of claim 1, comprising from about 13 weight percent to about 19 weight percent polyester bicomponent yarns, based on total fabric weight.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An AC power reduction measurement system for determining an amount of power reduction used by a load from an AC voltage source, said reduction measurement system comprising:
an alternating reference signal generator;
a comparator having a first input connected with the alternating reference signal generator and a second input connected with a line operable to carry a signal to be measured; and
a processor operable to determine an amount of power reduction as a function of the output of the comparator.
2. The reduction measurement system of claim 1 wherein the alternating reference signal generator comprises a triangle signal generator.
3. The reduction measurement system of claim 1 wherein the comparator is operable to output a signal representing a duty cycle of the signal to be measured.
4. The reduction measurement system of claim 1 wherein the signal to be measured comprises an alternating voltage signal.
5. The reduction measurement system of claim 1 wherein the signal to be measured comprises an alternating current signal.
6. The reduction measurement system of claim 1 wherein the processor is operable to determine a difference between an amount of power at a first time from at a second, different time.
7. The reduction measurement system of claim 6 wherein the amount of power reduction comprises a percentage of reduction from a full power mode to a power savings mode.
8. The reduction measurement system of claim 1 further comprising a display connected with the processor, the display operable to indicate the amount of power reduction.
9. The reduction measurement system of claim 1 wherein the line comprises an AC source line.
10. A method for determining an amount of power reduction by an AC power reduction measurement system, said method comprising:
(a) generating an alternating reference signal;
(b) comparing the alternating reference signal with a signal to be measured;
(c) reducing a power characteristic of the signal to be measured; and
(d) calculating an amount of power reduction as a function of (b) and (c).
11. The method of claim 10 wherein (a) comprises generating a triangle signal having a frequency greater than a frequency of the signal to be measured.
12. The method of claim 10 further comprising:
(e) outputting a signal representing a duty cycle of the signal to be measured, the output of (e) responsive to (b).
13. The method of claim 10 wherein (b) comprises comparing the alternating reference signal with the signal to be measured comprising an alternating voltage signal.
14. The method of claim 10 wherein (b) comprises comparing the alternating reference signal with the signal to be measured comprising an alternating current signal.
15. The method of claim 10 wherein (d) comprises calculating a difference between an amount of power at a first time from at a second, different time.
16. The method of claim 15 wherein (c) comprises operating in a power savings mode, and (d) comprises calculating the amount of power reduction as a percentage of reduction from a full power mode to the power savings mode.
17. The method of claim 10 further comprising:
(e) displaying the amount of power reduction.
18. The method of claim 10 wherein (b) comprises comparing the alternating reference signal with the signal to be measured comprising an AC source signal.
19. An AC power measurement system for determining an amount of power used by a load from an AC voltage source, said measurement system comprising:
an alternating reference signal generator;
first and second comparators, each of the first and second comparators having a first input connected with the alternating reference signal generator, the first comparator having a second input connected with a voltage signal line to be measured, and the second comparator having a second input connected with a current signal line to be measured; and
a processor operable to determine an amount of power as a function of the output of the first and second comparators.
20. The reduction measurement system of claim 19 wherein the processor is operable to determine a percentage reduction in watts between a full power mode and a power savings mode.