Lighting element for a firearm or sight

Abstract

A lighting element for a firearm or sight with a gaseous tritium light source and with an injection-molded plastic housing, wherein the plastic housing at least partially encloses the gaseous tritium light source. High mechanical ruggedness can be achieved if the plastic housing at least partially consists of a polyamide 12 (PA12)-based or polycarbonate (PC)-based plastic.

Claims

1. A lighting element for a firearm or sight, comprising: a gaseous tritium light source; and an injection-molded plastic housing that at least partially encloses the gaseous tritium light source, wherein the plastic housing at least partially consists of a polyamide 12 (PA12)-based or polycarbonate (PC)-based transparent plastic.

2. The lighting element according to claim 1, wherein the polyamide 12 (PA12) base is selected from the group consisting of PA 12/MACMI, PA MACMI/MACMT/12, and PA12 GF30 as well as mixtures or blends of one or more of these plastics.

3. The lighting element according to claim 1, wherein the polycarbonate (PC) base is selected from the PC-HT group as well as mixtures or blends of one or more of these plastics.

4. A sight comprising the lighting element according to claim 1.

5. The lighting element according to claim 1, wherein a first end of the plastic housing forms an optical lens.

6. The lighting element according to claim 5, wherein the lens is plano-convex, convex-convex, or concave-convex.

7. The lighting element according to claim 5, wherein an inner radius of the lens and an outer radius of the lens are different from each other.

8. The lighting element according to claim 1, wherein a first end of the plastic housing has an optical lens, and the lens is injection-molded onto the plastic housing or the plastic housing is injection-molded onto the lens using a 2-component injection-molding process.

9. The lighting element according to claim 8, wherein the lens is plano-convex, convex-convex, or concave-convex.

10. The lighting element according to claim 8, wherein an inner radius of the lens and an outer radius of the lens are different from each other.

11. The lighting element according to claim 10, wherein the inner radius and/or the outer radius is/are in a range from 1.25 to 4 times half of a diameter of the gaseous tritium light source.

12. The lighting element according to claim 1, wherein the plastic has pigments, and the pigments are selected from the group consisting of color pigments, luminous pigments, fluorescent pigments, phosphorescent pigments, and combinations thereof.

13. The lighting element according to claim 1, wherein the gaseous tritium light source is integrally bonded to the plastic housing with an adhesive.

14. The lighting element according to claim 13, wherein the adhesive is white.

15. The lighting element according to claim 1, wherein the gaseous tritium light source has a hermetically sealed glass tube as its outer shell.

16. The lighting element according to claim 1, wherein the injection-molded plastic housing is elongated.

17. The lighting element according to claim 1, wherein a see-through region of the plastic housing at least partially consists of the polyamide 12 (PA12)-based or polycarbonate (PC)-based plastic.

18. A firearm comprising the lighting element according to claim 1.

19. A firearm comprising the sight according to claim 4.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The subject matter of the invention is shown by way of example in the figures based on multiple embodiment variants. In the drawings:

(2) FIG. 1 shows a cross-sectional view of a lighting element according to a first exemplary embodiment,

(3) FIG. 2 shows a cross-sectional view of a lighting element according to a second exemplary embodiment,

(4) FIG. 3 shows a cross-sectional view of a lighting element according to a third exemplary embodiment,

(5) FIG. 4 shows a cross-sectional view of a partially depicted firearm with a sight, having a lighting element according to a fourth exemplary embodiment, and

(6) FIG. 5 shows a three-dimensional view of the sight according to FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(7) The lighting elements 1, 2, 3, 13 shown in FIGS. 1 to 4 all have a gaseous tritium light source 4, which is also known as a GTLS in the prior art. In the exemplary embodiments, this gaseous tritium light source 4 includes a hermetically sealed, round glass tube 4a made of borosilicate glass as its outer shellwherein the glass tube 4a is coated on the inside with a luminophore such as zinc sulfide 4b and is filled with tritium 4c. In all of the lighting elements 1, 2, 3, 13, the gaseous tritium light source 4 is provided in an elongated plastic housing 5, 6, 7, 15, which at least partially encloses the gaseous tritium light source 4 with its housing shell 5a, 6a, 7a and thus protects it from damage. The gaseous tritium light source 4 is held in the plastic housings 5, 6, 7, 15as shown in FIGS. 1, 2, 3, and 4.

(8) The first plastic housing 5 of the lighting element 1 according to FIG. 1 is injection molded out of a transparent plastic based on polyamide 12 (PA12), namely PA 12/MACMI. It is also conceivable for the first plastic housing 5 to be injection molded out of a transparent PC-based plastic.

(9) By means of the PA 12/MACMI plastic, the first plastic housing 5 can advantageously also integrally form a concave-convex optical lens 8, which significantly reduces the design complexity of the lighting element 1. The plastic can be PC-based.

(10) The lens 8 adjoins a casing 5a of the first plastic housing 5 that is annular cross-section and in this example, forms the first end 5b of the plastic housing 5.

(11) The integration of the optical lens 8 with freely selectable lens shapes into the first plastic housing 5, however, does not incur added costs of any consequence, for example, if this is carried by means of an injection-molded shaping. It is therefore possible to omit a cost-intensive, specially produced, shaped lens or sapphire used as an insert in the plastic housing.

(12) As is clear from FIG. 1, the inner radius R2 of the lens 8 and the outer radius R1 of the lens 8 are different from each other.

(13) In addition, the gaseous tritium light source 4 is integrally bonded to the first plastic housing 5 by means of amore particularly whiteadhesive 9 in order to thus increase the brightness of the lighting element 1 at the end 5b through reflection.

(14) FIGS. 2 and 3 show lighting elements 2 and 3 with a differently shaped plastic housing 6 and 7.

(15) According to FIG. 2 the second plastic housing 6 is connected to a lens 10 onto which the second plastic housing 6 is injection molded. The second plastic housing 5 is injection molded of a transparent plastic based on polyamide 12 (PA12), namely PA 12/MACMI. It is also conceivable for the first plastic housing 5 to be injection molded of a transparent PC-based plastic. For example, the lens 10 is a sapphire.

(16) In comparison to this, the third plastic housing 7 according to FIG. 3 forms a lens 11. This third plastic housing 7 also forms an outer flange 14 that adjoins this lens 11 and accommodates a daylight sight ring 12. The daylight sight ring 12 is an additional component in the 2-component injection molding process. This daylight sight ring 12 improves the visibility of the lighting element 3 in daylight.

(17) The third plastic housing 5, which is another component in the 2-component injection molding process, is made of a transparent plastic based on polyamide 12 (PA12), namely PA 12/MACMI. It is also conceivable for a transparent PC-based plastic to be injection molded.

(18) The sight 100 according to FIG. 4 and FIG. 5 has a lighting element 13 according to a fourth exemplary embodiment, which is inserted into a metal housing 102 of the sight 100. It is also conceivable, however, for the lighting element 1, 2, or 3 to be inserted instead of the lighting element 13. The lighting element 13 is bonded to the metal housing 102 across an area with the aid of adhesive 109.

(19) Here, too, the fourth plastic housing 15 of the lighting element 13 also partially encloses the gaseous tritium light source 4, which is glued in a recess 16 on the circumference surface 15a of the plastic housing 15 with the aid of an additional adhesive 110. At the end 15b of the plastic housing 15, this forms a see-through region 17 for providing a view of the gaseous tritium light source 4. The fourth plastic housing 15 is made of a transparent plastic based on polyamide 12 (PA12), namely PA 12/MACMI. It is also conceivable for a transparent PC-based plastic to be injection molded.

(20) The sight 100 is provided on a barrel 104 of the firearm 101, as schematically depicted in FIG. 4.

(21) The selection of the polyamide 12 (PA12)-based or PC-based plastic for the various plastic housings 5, 6, 7, 15 yields a high mechanical ruggedness, high temperature resistance of up to 120? C. (degrees Celsius), and a chemical resistance.

(22) The plastic housing 5, 6, 7, 15 according to the invention also passes the environmental test according to NUREG (NUREG 1556, Vol. 8, Rev. 1, Appendix D). This NUREG test tests the environmental conditions of the lighting elements 1, 2, 3, 13 during its use for sights 100 and in so doing, subjects the plastic housing 5, 6, 7, 15 to tests of resistance to dry heat at 120? C., moist heat at 42? C. with 100% humidity, cold at ?46? C., temperature shock cycles (?46? C. to 80? C.), vibrations, pressure, mechanical shock (drop test), firing test with 5000 rounds, and penetration. In addition, tests for leaks and chemical resistance (e.g.: to gun cleaning compound) were performed.

(23) The testing of the lighting elements 1, 2, 3, 13 with the plastic housings 5, 6, 7, 15 according to the invention was thus carried out in relation to cleaning compounds according to the specification MIL-C-372B of (NUREG 1556, Vol. 8, Rev. 1, Appendix D, 3.3.2.1 Chemical). This requirement was adapted to current practice, i.e. the carcinogenic and thus prohibited agent chloroform was replaced with the conventional substances listed below. The resistance of the lighting element 1, 2, 3, 13 was tested by immersing it for forty-eight hours at room temperature in each of the following substances: Cleaning compounds, gun oils, and products containing combinations thereof: MIL-C-372B Neoval Ultra-Clean Ballistol Oil Hoppe's Black No. 9 gun cleaner Hoppe's Black No. 9 copper cleaner Hoppe's Black No. 9 Gun Oil Lucas Oil CLP Extreme Duty CLP-4 Break Free Brunox gun care spray Robla, Solo MIL barrel cleaner Neoval oil spray
and the following agents: diesel gasoline (kerosene) 5% sodium chloride insect repellents

(24) The illuminants 1, 2, 3, 13 with the plastic housings 5, 6, 7, 15 according to the invention passed all of these tests.