Connector with wire sealing webs

Abstract: An improved MIL-C-26500 type connector having wire sealing webs (5), a hard dielectric face socket insert (14) to detect splayed or bent pins (27), and a controlled configuration of contact retention clips providing improved electrical performance, easy insertion and removal of contacts and improved serviceability. Additionally, a receptacle connector has a set of ground wave springs (31) assembled on the receptacle connector flange (30) to assure a secure ground path on electrically bonded connectors.

Description: The present invention concerns electrical connectors according to claim 1 and 10. It is an object of the present invention to eliminate waste associated with Mil-C-26500 type connector assembly and increase reliability and maintainability of the electrical connectors. As will be hereinafter appreciated, the present invention significantly lowers cost in the assembly of connectors and greatly improves the interconnection between the plug and receptacle connectors thereby avoiding discontinuities. Another object of the invention is to maintain Mil-C-26500 connector environment resistivity. A further object of the invention is to ensure proper mating or coupling on the electrical pin and socket contacts when splayed or bent contacts are affected. Yet another object of the invention is to eliminate manufacturers variation on the construction of the contact retention clips and institute ease of assembly or disassembly of the electrical contacts. A still further object of the invention is to provide a set of straight wave spring that becomes effective to assist the connector mounting screws in maintaining a secure ground path on the aircraft connectors that requires electrical bonding. The present invention provides Mil-C-26500 type electrical connectors with wire sealing webs, provision of a hard dielectric face socket insert to detect splayed or bent electrical contacts, user friendly retention clips which enhances insertion and removal of contacts resulting to elimination of damaged or push back retention clips. Ground wave springs assure protection against lightning strike and continued system protection against high intensity radio frequency (HIRF). By reason of improved electrical characteristics, the mechanical construction is also improved. The present invention is defined in independent claims 1 and 10. The other claims define preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side elevational view of a Mil-C-26500 electrical receptacle connector, a portion thereof being broken away in order to show the connector's internal construction illustrating installed shrinkable build-up sleeve on wire; Fig. 2 is a developed view of the sealing web formed in the rubber grommet of the Mil-C-26500 electrical connector; Fig. 3A-C is a graphical representation illustrating a Mil-C-26500 electrical plug connector having a hard dielectric face socket insert construction. A sectionalized view taken along lines 3B-3B, for the purpose of illustrating the connector insert consisting of two layers of material; in which the insert face is hard dielectric and functionally shaped and then bonded to an elastomeric type rubber; Fig. 4 is a fragmentary view depicting the internal construction of the connector for the purpose of illustrating the shape, size and construction of parts which form the present user friendly attributes on the contact retention clips of Mil-C-26500 connectors; and Fig. 5 is another fragmentary view corresponding generally to Fig. 4 but illustrating the criticality of assembling the rubber grommet to the other parts described in Fig. 4. Fig. 6A-D is a graphical representation illustrating a Mil-C-26500 electrical receptacle connector having a ground wave springs assembled on the receptacle flange. A detailed view of the ground wave spring and sectionalized view 6C-6C are show for the purpose of illustrating the shape, size and construction of parts as the attributes in the enhancement of maintaining a secure ground path on the receptacle connector to the aircraft panel and/or structure. DETAILED DESCRIPTION OF THE INVENTION An electrical, circular, environment resisting connector exemplifying the present invention is detailed in its entirety in Fig. 1 through Fig. 6. A connector of this type comprises a rigid shell 1 containing a rubber grommet 2 having formed inside a seal webbing 5, a rigid dielectric contact retainer 3 and a rubber insert 4. These members all being fixedly retained in the shell 1. Also, pictured is an electrical pin contact 6 crimped to a wire 7 with a shrinkable sleeve 8 used to build up diameter of wire 7. The several members 2-5 encompass and hold in place any preferred number of contacts 6, the precise number depending upon the number of wires 7 to be electrically connected. Although the function thereof is not readily apparent at this stage of the description, it can be pointed out that the seal webbing 5 in the rubber grommet 2 ensures an environmentally resistant property of the connector. For this description but not limited thereto, the existing seal webbing 5 is constructed to accommodate size 20 contact 6,15 on wire 7 with diameter range of 1.01 to 2.29 mm (0.040 to 0.090 in). Fig. 2 is illustrative of the present invention environment resisting rubber grommet 2 having seal webbing 5 with a wire seal range of 0.89 to 2.29 mm (0.035 to 0.090 in). At this time, attention is called to the shape and size of the seal webbing 5 construction in which the smaller diameter 9 of the seal webbing 5 is now 0.53 to 0.55 mm (0.021 to 0.0215 in.) but still within the molding elasticity of the rubber grommet 2. Equally important is the addition of a 0.64 to 0.76 mm (0.025 to 0.030 in.) flat radius 10 on each of the three seal webbings convolutions 11-13, thus securing a much more reliable wire seal. Another feature of the invention is shown in Fig. 3. As described earlier, conventional connector of this type uses a rubber insert 4 on both the plug 16 and receptacle 17 connectors. It should be understood that a plug 16 connector having socket contact 15 coupled to a receptacle 17 connector having a pin contact 6 can result in improperly mated pin 6 and socket 15 contacts. This condition exists when splayed or bent contacts are mated whereby the pin contact 6 is laying outside or alongside the socket contact 15. Performing a very critical role in the practicing of the invention is a specially configured hard dielectric face insert 14. The hard dielectric face insert 14 is physically added to the existing rubber insert 4. In order to comply to the dimensional geometry 39, 40 of the Mil-C-26500 receptacle 17 and plug 16 connectors interfacial seal, the layer of hard dielectric 14 is substituted to the removed portion of the rubber insert 4. As can be seen in Fig. 3, a layer of the hard dielectric 14 is bonded to the rubber insert 4 when the plug connector 16 or receptacle connector 17 has socket contacts 15. In this regard, it is to be observed that the socket contact hole opening 18 in the hard dielectric 14 has a diameter that chamfers down to another contact hole diameter 19 which is smaller in size than the combined diameter of the front ends 26 and 49 of the pin 16 and socket 15 contacts. Owing to these dimensional configurations, the inadvertent mating of splayed or bent contacts is eliminated. The advantages to be derived from incorporating standardized, user friendly contact retention clips 20 on the Mil-C-26500 connector is graphically illustrated on Figs. 4 and 5. It shall be observed that the contact retention clips 20 hole opening 28 is at the receiving end of a series of predetermined diameters 21-23 designed to lead in pin 6 and socket 15 contacts without interference. Also, attention is called to the positioning 24 and hole opening 25 of the retention clip tines 27. It can be discerned that this construction permits contacts 6,15 extraction with ease. Otherwise stated, the advantages can be understood as (1) less critical assembly or bonding of the rubber grommet 2 towards alignment with the rigid dielectric contact retainer 3 whereby each component halves or parts 2,3 has plurality of contact holes 29, (2) insertion and removal of contacts 6,15 is vastly improved and (3) construction variations and damage to the contact retention clips 20 are eliminated. These advantageous features are all simultaneously realized by virtue of the construction on the contact retention clips 20 within and outside the rigid dielectric contact retainer 3. From Figs. 6A-D it will be further discerned that adjacent to each receptacle 17 connector mounting hole 32 is a wave spring 31. For this illustration but not limited to is a 0.12 mm (0.005 in) thick BeNi wave spring 31 which is held stationary in a configured dimensioned slot 33. Although, the way it is held stationary is relatively unimportant to a practicing of the invention, it is imperative that its properly adjusted positions, height 34 and length 36, be maintained accordingly to the slot 33 depth 35 and length 37. For this purpose, the wave spring 31 is designed to about 60 percent point of compression or deflection when the receptacle 17 connector is mounted to the aircraft panel and/or structure 38 using mounting screws. It can be understood that the wave springs 31 permits a maintainable, reliable and secure ground path to the mounted receptacle 17 connector. Waste elimination associated with Mil-C-26500 type electrical connector assemblies, increased reliability and maintainability on these connectors with the addition of an improved environment resistant seal webbing 5, hard dielectric face socket insert 14, user friendly contact retention clips 20 and ground wave springs 31 are all realized in the preferred embodiment.

Claims: A Mil-C-26500 type electrical connector for standard insertion and removal in electrical contact assembly comprising an environment resisting rubber grommet (2) having sealing webs (5) and a rubber insert (4) characterized by a layer (3) of hard dielectric bonded rigidly to the rear face of said rubber insert, and contact retention clips (20) in which electrical contacts are received in tapered openings, said clips being fixedly secured within said layer (3). An electrical connector according to claim 1, wherein said seal webs have ranges on wire diameter consisting of: 0.89 to 2.29 mm (0,035 to 0,090 in) for size 20 contact 1.65 to 3.30 mm (0,065 to 0,130 in) for size 16 contact 1.85 to 3.56 mm (0,075 to 0,140 in) for size 12 contact A Mil-C-26500 type electrical connector according to claim 1, in which said contact retention clips (20) are located on a receiving end of a series of hole diameters (21-23) shaped to inwardly receive said contact (6,15). A Mil-C-26500 type electrical connector according to claim 1, in which the positioning (24) and hole opening (25) of contact retention clip tines (27) provide access toward removal of said electrical contact. A Mil-C-26500 type electrical connector according to claim 1, provided with three sealing webs (11-13) in the grommet. A Mil-C-26500 type electrical connector according to claim 1-5, wherein the connector has a set of ground wave springs (31) assembled on the receptacle flange (40). A Mil-C-26500 type electrical connector according to claim 6, in which said ground wave springs (31) become effective in assisting connector mounting screws in providing a secure ground path to said bonded receptacle connectors. A Mil-C-26500 type electrical connector according to claim 6 or 7, in which each said inwardly projecting wave spring (31) is fixedly secured within configured dimensions slot (33). A Mil-C-26500 type electrical connector according to claim 8, in which said ground wave springs (31) are positioned adjacent to each said receptacle connector mounted hole (32). An electrical connector for standard insertion and removal in electrical contact assembly comprising an environment resisting rubber grommet (2) having sealing webs (5) and a rubber insert (4) characterized by a layer (3) of a hard dielectric bonded rigidly to the rear face of said rubber insert, and contact retention clips (20) in which electrical contacts are received in tapered openings, said clips being fixedly secured within said layer (3), a set of ground wave springs (31) being assembled on a flange portion. An electrical connector according to claim 10, in which said ground wave springs (31) are coupled to the connector mounting screws for providing a secure ground path to the connector. An electrical connector according to claim 1-3, wherein said wave springs are fixedly secured within configured slots (33).

Inventors: LAZARO JR LUIS J, LAZARO JR.,LUIS J.
Applicants: BOEING CO, THE BOEING COMPANY
Application year: 1996
Main classification: H01R13
IPC codes: H01R13