Krypton-85-free spark gap with cantilevered component

Patent metadata

Field	Value
Publication number	US-9913359-B1
Application number	US-201715400736-A
Country	US
Kind code	B1
Filing date	Jan 6, 2017
Priority date	Aug 17, 2016
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Embodiments of the present disclosure relate to a spark gap device that includes a first electrode having a first surface and a second electrode having a second surface offset from and facing the first surface. The spark gap device also includes a cantilevered component coupled to the first electrode that is configured to generate a field emission, a corona discharge or both, to emit light toward at least the first surface such that photons are incident on the first surface and cause electron emission from the first surface. The spark gap device may not include a radioactive component.

First claim

The invention claimed is:

1. A spark gap device, comprising:
a first electrode having a first surface;
a second electrode having a second surface offset from and facing the first surface; and
a cantilevered component coupled to a third surface of the first electrode, wherein the cantilevered component is configured to generate a field emission, a corona discharge, or both to emit light toward at least the first surface such that photons emitted by the field emission, the corona discharge, or both when the spark gap is operated are incident on the first surface and cause electron emission from the first surface.

2. The spark gap device of claim 1 , wherein the cantilevered component comprises an “L” shape having a first portion and a second portion.

3. The spark gap device of claim 2 , wherein the first portion extends radially outward from the first electrode a first distance, and wherein the second portion extends axially from the first portion a second distance.

4. The spark gap device of claim 3 , wherein the first distance is between 3 millimeters (mm) and 5 mm.

5. The spark gap device of claim 3 , wherein the second distance is between 3 millimeters (mm) and 5 mm.

6. The spark gap device of claim 2 , wherein the second portion extends past a surface of the first electrode.

7. The spark gap device of claim 1 , wherein the cantilevered component comprises a first diameter that is between 1% and 5% of a second diameter of the first electrode.

8. The spark gap device of claim 1 , wherein the first electrode comprises a cathode and the second electrode comprises an anode.

9. The spark gap device of claim 1 , wherein the spark gap device does not include a radioactive component.

10. The spark gap device of claim 1 , wherein the cantilevered component is configured to emit the field emission, the corona discharge, or both to emit the light toward the second surface.

11. An ignition device, comprising:
one or more igniters configured to ignite a fuel stream or vapor during operation; and
one or more exciter components, each connected to a respective igniter, wherein each exciter component comprises a spark gap having a cantilevered component configured to generate a field emission, a corona discharge, or both when the spark gap is operated.

12. The ignition device of claim 11 , wherein the spark gap comprises:
a first electrode having a first surface; and
a second electrode having a second surface offset from and facing the first surface, wherein the cantilevered component is coupled to a third surface of the first electrode.

13. The ignition device of claim 12 , wherein the first electrode is a cathode and the second electrode is an anode.

14. The ignition device of claim 12 , wherein the cantilevered component comprises a first diameter that is between 1% and 5% of a second diameter of the first electrode.

15. The ignition device of claim 12 , wherein the cantilevered component comprises an “L” shape having a first portion and a second portion.

16. The spark gap device of claim 15 , wherein the first portion extends radially outward from the first electrode a first distance, and wherein the second portion extends axially from the first portion a second distance.

17. The ignition device of claim 11 , wherein the cantilevered component is disposed within a housing of the spark gap.

18. A method for generating a conductive plasma, comprising:
applying a voltage across a spark gap comprising a first electrode and a second electrode, wherein the first electrode comprises a surface facing the second electrode, and wherein a cantilevered component is coupled to the first electrode;
generating free electrons at a tip portion of the cantilevered component via a field emission, a corona discharge, or both; and
subsequent to generating the free electrons, generating the conductive plasma across the spark gap.

19. The method of claim 18 , wherein free electrons are not generated by a radioactive isotope.

20. The method of claim 18 , wherein generating the free electrons at the tip portion of the cantilevered component via the field emission, the corona discharge, or both, comprises generating a high intensity electric field at the tip portion.

Assignees

• Gen Electric

Inventors

• Michael Joseph Darryl
• Sommerer Timothy John
• Younsi Karim
• Rahmane Mohamed

Classifications

• F02P23/04

  Other physical ignition means, e.g. using laser rays · CPC title

• H01T19/00

  Devices providing for corona discharge (for charging electrographic elements G03G15/02) · CPC title

• H05H1/52 Primary

  using exploding wires or spark gaps (H05H1/26 takes precedence) · CPC title

• H01T1/20 Primary

  Means for starting arc or facilitating ignition of spark gap · CPC title

• F05D2250/75

  given by its similarity to a letter, e.g. T-shaped · CPC title