Author: claimsbot

1. A compound represented by Formula I:
or a salt, ester or hydrate thereof, wherein:
X is halo, or X is O\u2014W-Z, wherein W is a bond, \u2014CH2\u2014, (O)\u2014 or (O)CH2\u2014;
Z is selected from the group consisting of:
(1) H,
(2) C1-11alkyl,

(3) C3-11cycloalkyl or a benzofused analog thereof,
(4) phenyl or naphthyl, and
(5) HET1, wherein HET1 represents a 5- to 10-membered mono- or bicyclic, aromatic or non-aromatic ring, or a benzofused analog thereof, containing 1-3 heteroatoms selected from O, S and N,
groups (2), (3) and (5) above are optionally substituted with 1-2 oxo groups,
groups (2)-(5) above are further optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo
(b) nitro,
(c) hydroxy,
(d) C1-4alkyl,
(e) C1-4alkoxy,
(f) C1-4alkylthio,
(g) C3-6cycloalkyl,
(h) phenyl or naphthyl,
(i) phenoxy,
(j) benzyl,
k) benzyloxy, and
(l) a 5 or 6-membered aromatic or non-aromatic ring containing from 1-3 heteroatoms selected from O, S and N,

groups (d)-(g) above are optionally substituted with oxo and 1-3 substituents independently selected from halo and C1-4alkoxy,
groups (h)-(l) above are optionally substituted with 1-3 substituents independently selected from halo and C1-4alkyl, and
group (4) is further optionally substituted up to its maximum with halo groups;
R2 is selected from the group consisting of:
(1) H,
(2) halo,
(3) hydroxy,
(4) nitro,
(5) cyano,
(6) C1-10alkyl, C3-10cycloalkyl, C1-10alkoxy, \u2014S(O)0-2C1-10alkyl or \u2014NHC1-10alkyl, each optionally substituted with 1-2 oxo or carboxy groups and further optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo,
(b) hydroxy
(c) cyano,
(d) C1-4alkoxy,
(e) \u2014NHR7, wherein R7 is independently H or C1-5alkyl,
(f) \u2014S(O)0-2C1-4alkyl, and
(g) HET2, wherein HET2 represents a 5- to 7-membered aromatic or non-aromatic ring containing 14 heteroatoms selected from O, S and NR8, wherein R8 is independently H or C1-5alkyl, said HET2 being optionally substituted with oxo and further optionally substituted with 1-2 substituents independently selected from halo and C1-4alkyl, said C1-4alkyl being optionally substituted with 1-3 halo groups,

(7) phenoxy or \u2014S(O)0-2phenyl,
(8) benzyloxy or \u2014S(O)0-2benzyl,
(9) benzoyl,
(10) phenyl or naphthyl,
(11) \u2014O-HET2 or \u2014HET2, said HET2 being optionally substituted with oxo and further optionally substituted as defined below, and
(12) HET3, wherein HET3 is a 5- or 6-membered aromatic or non-aromatic ring, or a benzofused analog thereof, containing from 1 to 4 heteroatoms selected from O, S and N, said HET3 being optionally substituted with oxo and further optionally substituted as defined below,

groups (7)-(12) above are each optionally substituted with 1-2 substituents independently selected from the group consisting of: halo, cyano, C1-4alkyl and C1-4alkoxy, said C1-4alkyl and C1-4alkoxy being optionally substituted with 1-3 halo groups;
R3 is phenyl or C1-10alkyl, said C1-10alkyl optionally substituted with 1-2 oxo or carboxy groups and further optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo,
(b) hydroxy
(c) cyano,
(d) C1-4alkoxy,
(e) \u2014NHR7, wherein R7 is independently H or C1-5alkyl,
(f) \u2014S(O)0-2C1-4alkyl, and
(g) HET2, wherein HET2 represents a 5- to 7-membered aromatic or non-aromatic ring containing 1-4 heteroatoms selected from O, S and NR8, wherein R8 is independently H or C1-5alkyl, said HET2 being optionally substituted with oxo and further optionally substituted with 1-2 substituents independently selected from halo or C1-4alkyl, said C1-4alkyl being optionally substituted with 1-3 halo groups,

each R4 is independently selected from the group consisting of: H, halo, hydroxy, C1-6alkyl and C1-4alkoxy, said C1-6alkyl and C1-4alkoxy being optionally substituted with oxo and further optionally substituted with 1-3 halo groups; and
R5 is selected from the group consisting of: H, phenyl, naphthyl, C1-6alkyl optionally substituted with OR12 and 1-3 halo groups, and C5-7 cycloalkyl optionally containing one heteroatom selected from O, S and NR13,
wherein R12 is selected from the group consisting of: H, C1-5alkyl optionally substituted with 1-3 halo groups, and benzyl optionally substituted with 1-3 substituents independently selected from halo, C1-4alkyl and C1-4alkoxy, and R13 is H or C1-4alkyl optionally substituted with 1-3 halo groups; and
R6 represents H;
or in the alternative, R5 and R6 are taken in combination and represent a ring of 4-7 members, said ring optionally containing one heteroatom selected from O, S and NR13.
2. The compound according to claim 1 wherein X is halo.
3. The compound according to claim 1 wherein X is \u2014O\u2014W-Z.
4. The compound according to claim 3 wherein Z is selected from the group consisting of:
(1) C1-11alkyl,
(2) C3-11cycloalkyl or a benzofused analog thereof, and
(3) phenyl or naphthyl,
wherein groups (1)-(3) above are optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo
(b) nitro,
(c) hydroxy,
(d) C1-4alkyl,
(e) C1-4alkoxy,
(f) C1-4alkylthio,
(g) C3-6cycloalkyl,
(h) phenyl or naphthyl,
(i) phenoxy,
(j) benzyl and
(k) benzyloxy.
5. The compound according to claim 1 wherein R3 is methyl.
6. The compound according to claim 1 wherein R2 and each R4 are hydrogen.
7. The compound according to claim 1 wherein R5 is selected from the group consisting of: C1-6alkyl, phenyl and naphthyl.
8. The compound according to claim 1 wherein:
X is halo or \u2014O\u2014W-Z;
W is a bond, \u2014CH2\u2014, C(O)\u2014 or \u2014C(O)CH2\u2014;
Z is selected from the group consisting of:
(1) C1-6alkyl, optionally substituted with 1-3 halo groups,
(2) C3-11cycloalkyl or a benzofused analog thereof, and
(3) phenyl or naphthyl, optionally substituted with 1-3 groups independently selected from halo or C1-4alkyl,

R3 is methyl, ethyl or phenyl;
R2 and each R4 are hydrogen;
R5 is selected from the group consisting of: C1-6alkyl, C5-7cycloialkyl, phenyl and naphthyl; and
R6 is hydrogen.
9. A compound of Formula II
or a salt, ester or hydrate thereof, wherein:
X is halo;
R1 and R2 are each independently selected from the group consisting of:
(1) H,
(2) halo,
(3) hydroxy,
(4) nitro,
(5) cyano,
(6) C1-10alkyl, C3-10cycloalkyl, C1-10alkoxy, \u2014S(O)0-2C1-10alkyl or \u2014NHC1-10alkyl, each optionally substituted with 1-2 oxo or carboxy groups and further optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo,
(b) hydroxy
(c) cyano,
(d) C1-4alkoxy,
(e) \u2014NHR7, wherein R7 is independently H or C1-5alkyl,
(f) \u2014S(O)0-2C1-4alkyl, and
(g) HET2, wherein HET2 represents a 5- to 7-membered aromatic or non-aromatic ring containing 14 heteroatoms selected from O, S and NR8, wherein R8 is independently H or C1-5alkyl, said HET2 being optionally substituted with oxo and further optionally substituted with 1-2 substituents independently selected from halo and C1-4alkyl, said C1-4alkyl being optionally substituted with 1-3 halo groups,

(7) phenoxy or \u2014S(O)0-2phenyl,
(8) benzyloxy or \u2014S(O)0-2benzyl,
(9) benzoyl,
(10) phenyl or naphthyl,
(11) \u2014O-HET2 or \u2014S-HET2, said HET2 being optionally substituted with oxo and further optionally substituted as defined below, and
(12) HET3, wherein HET3 is a 5- or 6-membered aromatic or non-aromatic ring, or a benzofused analog thereof, containing from 1 to 4 heteroatoms selected from O, S and N, said HET3 being optionally substituted with oxo and further optionally substituted as defined below,

groups (7)-(12) above are each optionally substituted with 1-2 substituents independently selected from the group consisting of: halo, cyano, C1-4alkyl and C1-4alkoxy, said C1-4alkyl and C1-4alkoxy being optionally substituted with 1-3 halo groups;
R3 is C1-10alkyl, optionally substituted with 1-2 oxo or carboxy groups and further optionally substituted with 1-3 substituents independently selected from the group consisting of:
(a) halo,
(b) hydroxy
(c) cyano,
(d) C1-4alkoxy,
(e) \u2014NHR7, wherein R7 is independently H or C1-5alkyl,
(f) \u2014S(O)0-2C1-4alkyl, and
(g) HET2, wherein HET2 represents a 5- to 7-membered aromatic or non-aromatic ring containing 14 heteroatoms selected from O, S and NR8, wherein R8 is independently H or C1-5alkyl, said HET2 being optionally substituted with oxo and further optionally substituted with 1-2 substituents independently selected from halo or C1-4alkyl, said C1-4alkyl being optionally substituted with 1-3 halo groups,

each R4 is independently selected from the group consisting of: H, halo, hydroxy, C1-6alkyl and C1-4alkoxy, said C1-6alkyl and C1-4alkoxy being optionally substituted with oxo and further optionally substituted with 1-3 halo groups; and
R5 is selected from the group consisting of: H, phenyl, naphthyl, C1-6alkyl optionally substituted with OR12 and 1-3 halo groups, and C5-7 cycloalkyl optionally containing one heteroatom selected from O, S and NR13,
wherein R12 is selected from the group consisting of: H, C1-5alkyl optionally substituted with 1-3 halo groups, and benzyl optionally substituted with 1-3 substituents independently selected from halo, C1-4alkyl and C1-4alkoxy, and
R13 is H or C1-4alkyl optionally substituted with 1-3 halo groups; and
R6 represents H;
or in the alternative, R5 and R6 are taken in combination and represent a ring of 47 members, said ring optionally containing one heteroatom selected from O, S and NR13.
10. The compound according to claim 9 wherein:
R1 is selected from the group consisting of:
(1) halo,
(2) C1-4alkyl or C1-4alkoxy, each optionally substituted with oxo and 1-3 halo groups, and
(3) HET3, wherein HET3 is a 5- or 6-membered aromatic or non-aromatic ring, or a benzofused analog thereof, containing from 1 to 4 heteroatoms selected from O, S and N, and optionally substituted with 1-2 substituents independently selected from halo and C1-4alkyl, said C1-4alkyl being optionally substituted with 1-3 halo groups;

R2 and each R4 are hydrogen;
R5 is selected from the group consisting of: C1-6alkyl, phenyl and naphthyl; and
R6 is hydrogen.
11. The compound according to claim 10 wherein HET3 is 1,2,4-oxadiazole, optionally substituted with C1-4alkyl.
12. A method for detecting active caspase-3 in cells or tissues of a mammal comprising contacting said cells or tissues with a compound of claim 1 and detecting active caspase-3.
13. A method for detecting active caspase-3 in cells or tissues of a mammal comprising contacting said cells or tissues with a compound of claim 9 and detecting active caspase-3.
14. A method for determining the caspase-3 active site occupancy of a sample reversible caspase-3 inhibitor in an animal model of cellular injury comprising:
1) administering to said animal said sample reversible caspase-3 inhibitor;
2) euthanizing said animal and extracting said injured cells;
3) contacting said injured cells ex vivo with a compound according to claim 1;
4) detecting the amount of said compound to determine the number of caspase-3 free active sites; and
5) comparing said number of caspase-3 free active sites to the total measure of active caspases to determine the caspase-3 active site occupancy.
15. A method for determining the caspase-3 active site occupancy of a sample reversible caspase-3 inhibitor in a cell culture comprising:
1) contacting said cell culture with a sample reversible caspase-3 inhibitor;
2) contacting said cell culture with a compound according to claim 1;
3) detecting the amount of said compound to determine the number of caspase-3 free active sites; and
4) comparing said number of caspase-3 free active sites to the total measure of active caspases to determine the caspase-3 active site occupancy.
16. A kit for detecting active caspase-3 in cells or tissues of a mammal comprising a compound of claim 1.
17. A kit for detecting active caspase-3 in cells or tissues of a mammal comprising a compound of claim 9.
18. The compound according to claim 1 which is
or a salt, ester or hydrate thereof.
19. A compound according to claim 1 which is selected from the following table:

or a salt, ester or hydrate of any of the above.
20. A compound of any one of claims 1 to 11, 18 or 19 for use in detecting active caspase-3 in cells or tissues of a mammal.
21. A compound of any one of clams 1 to 11, 18 or 19 for use in determining the caspase-3 active site occupancy of a sample reversible capase-3 inhibitor in an animal model of cellular injury.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A gas generating system comprising:
a baffle system for cooling a gas generated by the gas generating system, the baffle system including:
a first enclosure;
a second enclosure spaced apart from a wall of the first enclosure to define a first fluid flow passage between the second enclosure and the wall, the second enclosure defining a baffle chamber therein, the second enclosure including at least one first opening for enabling fluid communication between a gas source and the second enclosure baffle chamber, and at least one second opening for enabling fluid communication between the second enclosure baffle chamber and the first fluid flow passage; and
a third enclosure spaced apart from the wall of the first enclosure to define a second fluid flow passage between the third enclosure and the wall, the second fluid flow passage being in fluid communication with the first fluid flow passage, the third enclosure defining a baffle chamber therein, the third enclosure including at least one first opening for enabling fluid communication between the second fluid flow passage and the third enclosure baffle chamber, and at least one second opening for enabling fluid communication between the third enclosure baffle chamber and an exterior of the gas generating system,
wherein all generated gas flowing to the exterior of the gas generating system is directed through the third enclosure baffle chamber.
2. The gas generating system of claim 1 further comprising a rupturable, fluid-tight seal positioned to seal the at least one second enclosure first opening.
3. The gas generating system of claim 1 further comprising a rupturable, fluid-tight seal positioned to seal the at least one third enclosure second opening.
4. The gas generating system of claim 1 wherein the third enclosure is positioned adjacent the second enclosure.
5. The gas generating system of claim 1 wherein the second enclosure and the third enclosure from a single structure.
6. The gas generating system of claim 1 wherein the third enclosure abuts the second enclosure.
7. The gas generating system of claim 1 wherein the second fluid flow passage is contiguous with the first fluid flow passage.
8. The gas generating system of claim 1 wherein the gas source is a gas generant combustion chamber and the gas generating system further includes a barrier separating the second enclosure baffle chamber from the combustion chamber.
9. The gas generating system of claim 1 wherein the gas source is a gas generant combustion chamber and the gas generating system further includes a barrier separating the first fluid flow passage from the combustion chamber.
10. The gas generating system of claim 1 wherein the third enclosure is positioned adjacent the second enclosure along a longitudinal dimension of the gas generating system.
11. The gas generating system of claim 1 further comprising a gas generant composition and a barrier separating the first fluid flow passage from the gas generant composition.
12. The gas generating system of claim 11 wherein the gas generant composition is a smokeless gas generant composition.
13. The gas generating system of claim 1 further comprising a fourth enclosure spaced apart from a wall of the first enclosure to define a third fluid flow passage between the fourth enclosure and the wall, the fourth enclosure defining a baffle chamber therein, the fourth enclosure including at least one opening for enabling fluid communication between the third enclosure baffle chamber and the fourth enclosure baffle chamber; and
at least one opening for enabling fluid communication between the fourth enclosure baffle chamber and the third fluid flow passage,
wherein the third fluid flow passage is not in fluid communication with the second fluid flow passage, and the third fluid flow passage is in fluid communication with the exterior of the gas generating system.
14. The gas generating system of claim 13 further comprising a fifth enclosure spaced apart from a wall of the first enclosure to define a fourth fluid flow passage between the fifth enclosure and the wall, the fourth fluid flow passage being in fluid communication with the third fluid flow passage, the fifth enclosure defining a baffle chamber therein, the fifth enclosure including at least one opening for enabling fluid communication between the fourth fluid flow passage and the fifth enclosure baffle chamber, and
at least one opening for enabling fluid communication between the fifth enclosure baffle chamber and the exterior of the gas generating system.
15. The gas generating system of claim 14 wherein the fourth fluid flow passage is contiguous with the third fluid flow passage.
16. The gas generating system of claim 1 further comprising:
a gas generant composition;
an ignition source for igniting the gas generant composition upon activation of the gas generating system; and
a barrier positioned between the gas generant composition and the ignition source, the barrier including an orifice to enable fluid communication between the ignition source and the gas generant composition, the orifice defining a Venturi tube.

1. A system that facilitates detecting an object in a surround-view image of a vehicle and superimposing a semi-symbolic graphical representation of the object in the surround-view image, comprising:
a first camera that captures a first image of an object from a first vantage point;
a second camera that captures a second image of the object from a second vantage point;
a processor configured to:
generate a composite image by merging the first and second images;
analyze the composite image to detect one or more features indicative of the object in the composite image;
replace object pixels with corresponding background pixels;
generate a semi-symbolic graphical representation of the object that comprises one or more object features detected in the first and second images;
insert the semi-symbolic graphical representation of the object into the composite image at a calculated position of the object relative to the vehicle; and
output the composite image with the semi-symbolic representation to a display.
2. The system according to claim 1, wherein the processor is further configured to replace object pixels corresponding to the object in the first image with background pixels from the second image, and replace object pixels corresponding to the object in the second image with background pixels from the first image.
3. The system according to claim 1, wherein the object is a pedestrian and the one or more object features comprise one or more of:
pedestrian clothing color;
and
pedestrian height in pixels.
4. The system according to claim 1, wherein the object is a pedestrian and the processor is further configured to superimpose an image of the pedestrian’s face, or a similar face, on the semi-symbolic graphical representation.
5. The system according to claim 1, further comprising a disagreement calculation module configured to analyze the composite image to identify an area of disagreement D between the first and second images.
6. The system according to claim 5, further comprising a ray calculation module configured to calculate at least one ray emanating from each camera through its field of view to a boundaries of a more distant half, relative to each camera, of the area of disagreement D.
7. The system according to claim 6, wherein the object is a pedestrian and further comprising a ray intersection identification module configured to identify an intersection R of camera rays, wherein the intersection corresponds to a highest point of the pedestrian, and wherein the processor is configured to execute a tracking module configured to track the highest point of the pedestrian and to adjust the position of the semi-symbolic graphical representation to correspond to the tracked point.
8. The system according to claim 1, wherein the object is a pedestrian and the processor is further configured to execute an object shape identification module that identifies a shape formed by each of a front view representation and a rear view representation of the pedestrian in the composite image, wherein the position of the pedestrian relative at the vehicle is determined to be at the point of intersection of the front and rear view representations of the pedestrian in the composite image.
9. The system according to claim 8, wherein the object is a pedestrian and the processor is further configured to determine a height of the head of the pedestrian above the ground in the composite image, and wherein the processor is configured to execute a tracking filter that tracks the location of the head of the pedestrian and to adjust the position of the semi-symbolic graphical representation to correspond to the location of the head of the pedestrian.
10. A method of detecting an object in a surround-view image of a vehicle and superimposing a semi-symbolic graphical representation of the object in the surround-view image, comprising:
capturing a first image, from a first vantage point, of an object;
capturing a second image, from a second vantage point, of the object;
generating a composite image by merging the first and second images;
analyzing the composite image to detect one or more features indicative of the object in the composite image;
replacing object pixels with corresponding background pixels;
generating a semi-symbolic graphical representation of the object that comprises one or more object features detected in the first and second images;
inserting the semi-symbolic graphical representation of the object into the composite image at a calculated position of the object relative to the vehicle; and
outputting the composite image with the semi-symbolic representation to a display.
11. The method according to claim 10, further comprising replacing replace object pixels corresponding to the object in the first image with background pixels from the second image, and replace object pixels corresponding to the object in the second image with background pixels from the first image.
12. The method according to claim 10, wherein the object is a pedestrian and the one or more object features comprise one or more of:
pedestrian clothing color; and
pedestrian height in pixels.
13. The method according to claim 10, the object is a pedestrian and further comprising superimposing an image of the pedestrian’s face on the semi-symbolic graphical representation.
14. The method according to claim 10, wherein the object is a pedestrian and further comprising:
analyzing the composite image to identify an area of disagreement D between the first and second images;
calculating at least one ray emanating from each camera through its field of view to a boundaries of a more distant half, relative to each camera, of the area of disagreement D; and
identifying an intersection R of camera rays, wherein the intersection corresponds to a highest point of the pedestrian, and tracking the highest point of the pedestrian as it moves past the vehicle.
15. The method according to claim 10, wherein the object is a pedestrian and further comprising identifying a shape formed by each of a front view representation and a rear view representation of the object in the composite image, wherein the pedestrian is determined to be positioned where the front and rear view representations intersect in the composite image.
16. The method according to claim 15, further comprising determining a height of the head of the pedestrian above the ground in the composite image, and tracking the location of the head of the pedestrian as it moves past the vehicle.
17. A processor configured to execute computer-executable instructions for detecting an object in a surround-view image of a vehicle and superimposing a semi-symbolic graphical representation of the object in the surround-view image, the instructions comprising:
capturing a first image, from a first vantage point, of an object;
capturing a second image, from a second vantage point, of the object;
generating a composite image by merging the first and second images;
analyzing the composite image to detect one or more features indicative of the object in the composite image;
replacing object pixels with corresponding background pixels;
generating a semi-symbolic graphical representation of the object that comprises one or more object features detected in the first and second images;
inserting the semi-symbolic graphical representation of the object into the composite image at a calculated position of the object relative to the vehicle; and
outputting the composite image with the semi-symbolic representation to a display.
18. The processor according to claim 17, the instructions further comprising replacing object pixels corresponding to the object in the first image with background pixels from the second image, and replace object pixels corresponding to the object in the second image with background pixels from the first image.
19. The processor according to claim 17, wherein the object is a pedestrian and the one or more object features comprise one or more of:
pedestrian clothing color;
and
pedestrian height in pixels.
20. The processor according to claim 17, wherein the object is a pedestrian, the instructions further comprising superimposing an image of the pedestrian’s face on the semi-symbolic graphical representation.
21. The processor according to claim 17, wherein the object is a pedestrian, the instructions further comprising:
analyzing the composite image to identify an area of disagreement D between the first and second images;
calculating at least one ray emanating from each camera through its field of view to a boundaries of a more distant half, relative to each camera, of the area of disagreement D; and
identifying an intersection R of camera rays, wherein the intersection corresponds to a highest point of the pedestrian, and tracking the highest point of the pedestrian as it moves past the vehicle.
22. The processor according to claim 17, wherein the object is a pedestrian, the instructions further comprising identifying a shape formed by each of a front view representation and a rear view representation of the object in the composite image, wherein the pedestrian is determined to be positioned where the front and rear view representations intersect in the composite image.
23. The processor according to claim 22, wherein the object is a pedestrian, the instructions further comprising determining a height of the head of the pedestrian above the ground in the composite image, and tracking the location of the head of the pedestrian as it moves past the vehicle.
24. An apparatus that facilitates detecting an object in a surround-view image of a vehicle and superimposing a semi-symbolic graphical representation of the object in the surround-view image, comprising:
means for capturing a first image, from a first vantage point, of an object;
means for capturing a second image, from a second vantage point, of the object;
means for generating a composite image by merging the first and second images;
means for analyzing the composite image to detect one or more features indicative of the object in the composite image;
means for replacing object pixels with corresponding background pixels;
means for generating a semi-symbolic graphical representation of the object that comprises one or more object features detected in the first and second images;
means for inserting the semi-symbolic graphical representation of the object into the composite image at a calculated position of the object relative to the vehicle; and
means for outputting the composite image with the semi-symbolic representation to a display.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A flue baffle for use in a hot water tank flue pipe wherein said flue pipe is adapted to be in contact with water to be contained in an inner tank having a burner chamber at a lower end thereof, said flue baffle comprising an elongated rectangular metal strip having a plurality of spaced metal discs disposed substantially transverse to said strip and dimensioned to be spaced closely to an inner surface of the flue pipe, and two or more spacers protruding from a circumferential outer edge of said metal discs and are spaced apart from one another for frictional engagement with the inner surface of the flue pipe to maintain a substantially constant passage between said outer edge of said metal discs and the inner surface of the flue pipe.
2. A flue baffle as claimed in claim 1 wherein said metal discs are circular metal discs integrally formed with said elongated rectangular metal strip and disposed at right angles to said metal strip.
3. A flue baffle as claimed in claim 2 wherein said circular metal discs are each formed by two semi-circular disc sections cut from said metal strip, each disc section being disposed on a respective side of a transverse diametrical rib section, each disc section being bent at right angles from a respective edge of said rib section and on a respective one of opposed sides of said metal strip, said disc sections forming a substantially circumferential and constant passage about each said discs.
4. A flue baffle as claimed in claim 3 wherein said spacers are spacing nipples integrally formed with said semi-circular disc sections, there being two of said spacing nipples projecting from each said two semi-circular disc sections.
5. A flue baffle as claimed in claim 2 wherein said elongated rectangular metal strip has a stiffening rib formed along opposed elongated side edges thereof by a folded-over edge strip section, said edge strip sections and said transverse diametrical rib section forming a rigid support frame.
6. A flue baffle as claimed in claim 2 wherein said elongated rectangular metal strip has opposed support flanges projecting from opposed elongated side edges thereof at a top end of said elongated rectangular metal strip.
7. A flue baffle as claimed in claim 5 wherein said folded-over edge strip section extends from a bottom end of said elongated rectangular metal strip and terminates a short distance from a top end thereof to define an outwardly projecting flange section at said top end, said outwardly projecting flange section constituting a support flange for suspending said strip in the flue pipe.
8. A flue baffle as claimed in claim 2 wherein said flue baffle is a one-piece flue baffle constructed entirely from said elongated rectangular metal strip.
9. A flue baffle as claimed in claim 3 wherein said semi-circular disc sections are cut from said elongated rectangular metal strip by one of metal stamping or laser cutting.
10. A flue baffle as claimed in claim 1 wherein said elongated rectangular metal strip is constructed from 18 gauge steel sheet material.