Light source for use in leak detection in heating, ventilating, and air conditioning systems that utilize environmentally-safe materials

• US 5,674,000 A
• Filed: 02/08/1996
• Issued: 10/07/1997
• Est. Priority Date: 02/08/1996
• Status: Expired due to Term

• Current Assignee: Bright Solutions Incorporated (Bright Solutions)
• Original Assignee: Bright Solutions Incorporated (Bright Solutions)
• Inventors: Kalley, Terrence D.
• Primary Examiner(s): Lazarus, Ira S.
• Assistant Examiner(s): Basichas, Alfred
• Application Number:
  US08/598,435
• Time in Patent Office: 607 Days
• Field of Search: 362/293, 362/294, 362/306, 362/264
• US Class Current: 362/293
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 15/04 Resilient mountings, e.g. shock absorbers shock absorbing devices of vehicle headlamp housings B60Q1/0491; in general F16F15/04
• CPC Class Codes: F21V 29/15 Thermal insulation
• CPC Class Codes: G01M 3/228 for radiators

Abstract

A light source for use in examining leak detection sites in heating, ventilating, and air conditioning systems that utilize a fluorescence-producing dye in the refrigerant to determine the presence of leaks. The light source combines a faceted reflector with a lamp and interference filter to provide a narrowed emission of wavelength of light emitted from the light source.

Claims

1. A light source for examination of a substance which reemits light at a wavelength greater than the wavelength of light emitted from said light source, said light source comprising:

a lamp assembly including;

a faceted white light reflector;

said faceted white light reflector is a focusing reflector;

a lamp positioned between said faceted white light reflector and said substance;

said lamp connected to a source of electrical power and operated in response to said electrical power to emit light;

said faceted white light reflector functioning to reflect a selected portion of said light emitted from said lamp;

a lens filter positioned between said lamp assembly and said substance;

said lens filter operated to further restrict said light from said lamp and said light reflected by said faceted white light reflector;

whereby said light emitted from said light source is restricted to a predetermined range effective to enhance the reemission of light from said substance.

2. A light source as claimed in claim 1 wherein:

said lamp is a tungsten halogen lamp.

3. A light source as claimed in claim 1 wherein:

said faceted reflector is made of aluminum.

4. A light source as claimed in claim 1 wherein:

said faceted reflector is made of glass.

5. A light source as claimed in claim 4 wherein:

said glass faceted reflector includes an aluminized surface.

6. A light source as claimed in claim 1 wherein:

said lamp assembly further includes a protective shield functioning as an absorption filter.

7. A light source as claimed in claim 1 wherein:

said lamp assembly is prefocused to a predetermined beam spread.

8. A light source as claimed in claim 1 wherein:

said lens filter is an interference filter.

9. A light source as claimed in claim 1 wherein:

said lens filter is an absorption filter.

10. A light source as claimed in claim 1 wherein:

there is further included a shock absorbing compression spring positioned between said lamp and said lens filter functioning to maintain proper spacial relationship between said lamp and said filter lens.

11. A light source as claimed in claim 1 wherein:

said substance is a leak detection dye.

12. A light source as claimed in claim 11 wherein:

said dye is chosen from a group including naphthalimide, perylene, thioxanthine, coumarin, and fluorescene.

13. A light source as claimed in claim 1 wherein:

said wavelength of light emitted from said source is further restricted by the utilization of filter lens eyewear, or in the alternative a filter shield, employed by a user of said light source.

14. A light source as claimed in claim 13 wherein:

said wavelength of light emitted from said source is further restricted by the inclusion of long wavelength pass material in said filter lens eyewear or in the alternative included in said filter shield.

15. A light source for examination of a substance which reemits light at a wavelength greater than the wavelength of light emitted from said light source, said light source comprising:

a lamp assembly including;

a faceted white light reflector reflecting light primarily in an emission range having a wavelength between 400 and 700 nanometers;

said faceted white light reflector is a focusing reflector;

a lamp positioned between said faceted reflector and said substance;

said 1amp connected to a source of electric power and operated in response to said electrical power to emit light;

said faceted reflector functioning to reflect a selected portion of said light emitted from said lamp;

whereby said light emitted from said light source is restricted to a predetermined range effective to enhance the reemission of light from said substance.

16. A light source for examination of a substance which reemits light at a wavelength greater than the wavelength of light emitted form light source, said light source comprising:

a lamp assembly including;

a faceted white light reflector reflecting light primarily in an emission range having a wavelength of between 325 and 700 nanometers;

said faceted reflector is a focusing reflector;

a lamp positioned between said faceted reflector and said substance;

said lamp connected to a source of electrical power and operated in response to said electrical power to emit light;

said faceted reflector functioning to reflect a selected portion of said light emitted from said lamp;

whereby said light emitted from said light source is restricted to a predetermined range effective to enhance the reemission of light form said substance.