Thin walled lamp with tungsten halogen capsule and pyrophoric fuse

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the oxidizable coating is a combination of metals and a binder.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes iron.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes aluminum.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes boron.

An incondescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes organic binder.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes an acrylic binder.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes iron, aluminum, boron, and an acrylic binder.

An incandescent lamp comprising:

• a) a sealed, light transmissive tungsten halogen capsule receiving electrical power through a first lead and a second lead;
• b) at least one of the leads being coupled in series with an oxidizable electrical connection having a first pyrophoric stage ignitable at a first temperature and a second pyrophoric stage ignitable at a second temperature higher than the first temperature, the first pyrophoric stage positioned sufficiently near the second pyrophoric stage to transmit sufficient heat from the first pyrophoric stage during pyrophoric ignition to the second stage to cause ignition of the second stage;
• and
• c) a sealed light transmissive outer envelope enclosing the capsule, the oxidizable connection and an inert atmosphere around the connection, and providing electrical connection for the tungsten halogen capsule
• wherein the first pyrophoric stage is an oxidizable coating at least partially covering the second pyrophoric stage;
• and
• wherein the coating includes by weight about 84% iron, 5% aluminum, 10% boron and 1% acrylic binder.