1. In an apparatus for monitoring one or more motor vehicle tire conditions, said apparatus having a receiver for intercepting signals from sensors mounted on the tires, a processor for identifying, converting, evaluating and storing said sensor signals, a keypad for selecting sensor data, an alarm for indicating an undesirable tire condition, and a display for providing sensor data, that improvement which comprises:
a. an unswitched circuit connected to a voltage source and to the receiver and the processor in the monitoring apparatus; and
b. a switched circuit connected to the voltage source and to the monitoring apparatus as a whole.
2. The apparatus according to claim 1, wherein an ignition switch in the motor vehicle opens and closes the switched circuit.
3. The apparatus according to claim 2, wherein the unswitched circuit is operative when the ignition switch is turned off.
4. The apparatus according to claim 3, wherein a battery in the motor vehicle is the voltage source.
5. The apparatus according to claim 4, wherein a three conductor harness defines a portion of the unswitched and switched circuits, said three conductor harness having a grounded first conductor, a second conductor connected to the ignition switch, and a third conductor connected to the battery.
6. Apparatus according to claim 3, wherein the keypad, the alarm and the display are inoperative and the receiver and the processor are operative when the ignition switch is turned off.
7. The apparatus according to claim 6, wherein the processor identifies, converts, evaluates and stores sensor signals when the ignition switch is turned off.
8. Then apparatus according to claim 7, wherein sensor data generated by the processor when the ignition switch is turned off is available to the user as soon as the ignition switch is turned on.
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 combustor dome assembly for a gas turbine engine having a longitudinal centerline axis extending therethrough, comprising:
(a) an annular dome plate having an inner portion, an outer portion, a forward surface, and a plurality of circumferentially spaced openings formed therein, wherein a radial section defined between each of said openings includes a cooling trough formed therein; and,
(b) a free floating swirler located upstream of said dome plate in substantial alignment with each of said openings in said dome plate, said swirler including a forward portion and an aft portion;
wherein said aft portion of each said swirler is configured so as to permit air flow to said cooling trough during operation of the gas turbine engine.
2. The combustor dome assembly of claim 1, said swirler aft portion further comprising a substantially annular flange extending adjacent to said forward surface of said dome plate, wherein opposing portions of a circumference for said flange adjacent said radial sections of said dome plate are substantially linear.
3. The combustor dome assembly of claim 2, wherein the circumference of said swirler flange has a variable radius between said opposing portions.
4. The combustor dome assembly of claim 2, said swirler flange including an undercut along a portion of an aft surface thereof so as to form a recessed area.
5. The combustor dome assembly of claim 4, said swirler flange including a plurality of circumferentially spaced purge holes formed therein in flow communication with said recessed area.
6. The combustor dome assembly of claim 4, said aft surface of said swirler flange including a layer of thermal barrier coating along said recessed area.
7. The combustor dome assembly of claim 1, wherein each opening in said dome plate has at least a predetermined diameter.
8. The combustor dome assembly of claim 1, wherein a circumferential distance between adjacent openings in said dome plate is no greater than a predetermined amount.
9. The combustor dome assembly of claim 1, said swirler aft portion further comprising a lip connected to said flange and oriented substantially parallel to a centerline axis through a dome plate opening.
10. The combustor dome assembly of claim 9, further comprising a deflector plate connected to and positioned within each opening in said dome plate, wherein a cavity is formed between an inner surface of each deflector plate and said swirler aft lip.
11. The combustor dome assembly of claim 2, wherein said swirler aft portion is contoured to limit stress on said flange to a predetermined amount.
12. The combustor dome assembly of claim 5, wherein at least a portion of said purge holes in said swirler flange are angled in a first direction.
13. The combustor dome assembly of claim 12, wherein at least a portion of said purge holes in said swirler flange are angled in a second direction.
14. The combustor dome assembly of claim 5, wherein at least a portion of said purge holes in said swirler flange are oriented straight through said swirler flange.
15. The combustor dome assembly of claim 5, wherein said purge holes have a varying diameter.
16. The combustor dome assembly of claim 1, said swirler forward portion including a pair of anti-rotation tabs associated therewith.