Adaptor box for mounting fixture to low voltage track

An adaptor box for mounting a fixture to a low voltage lighting track comprising an insulating body formed by an elongate web joining flanges, having respective free ends from which mounting edge portions protrude inwards towards each other over the elongate web defining a channel section cavity for receiving a mounting head portion of the adapter box, ears located adjacent junctions of the flanges and the web and wire busses mounted on respective ears;

• the adaptor box comprising:
• a housing molded in one piece of insulating plastic material and comprising opposite side walls joined by upper, lower and rear walls providing a housing cavity having a front which is open, a mounting head integrally formed with the upper wall to upstand therefrom and formed with opposed mounting ears and a contact receiving through-passageway having a front, contact insertion opening, both the contact receiving through-passageway and the front, contact insertion opening extend from the housing cavity vertically through the mounting head between the mounting ears, the upper wall being formed with a recess extending from the front of the housing cavity which is open to the front, contact insertion opening so that the housing is open at a front and at a top, from the front to the front, contact insertion opening and an opening in the lower wall;
• an insert molded in one piece of insulating plastic material comprising a contact separating rib and a releasable, rotation preventing latching tab portion connected together to extend in generally parallel relation, one above the other, by a transverse, resilient web hinge,
• a pair of one-piece contacts extending through the contact receiving through-passageway each having one end located in the housing cavity for connection to respective conductors of a fixture and another end exposed for electrical connection to respective track busses,
• means for attaching a low voltage lighting fixture to the housing, and
• the housing and the insert having resilient latching means cooperable to assemble the housing and insert together in a snap fit,
• the insert being assembled with the housing by insertion of the contact separating rib through the front, contact insertion opening into the through-passageway, between the contacts, with the rotation preventing latching tab portion extending across the front of the housing cavity and the transverse, resilient web hinge extending across the recess, the rotation preventing latching tab comprising an upper catch portion which, in an undeformed position of the resilient web hinge, protrudes above the upper wall of the housing in a rotation preventing position preventing rotation of the housing relative to the channel section cavity of the track when the mounting head is received therein and a lower fingerpiece, depressible to deform the resilient web hinge and withdraw the upper catch portion toward the upper wall to a release position permitting rotation of the mounting head within the channel section cavity of the track to enable removal of the adaptor box therefrom;
• the improvement residing in that the one ends of the contacts comprise, respectively, a first, resilient female contact portion and a second, resilient female contact portion, means are provided in the housing cavity for locating the contacts with the first female contact portion aligned spaced apart from and above the second female contact portion to provide a common mating axis aligned with the opening in the lower wall,
• so that a male coax connector having a first male contact portion and a second male contact portion, located axially spaced apart from each other, adjacent and remote from a leading free end, respectively, can be inserted through the opening in the lower wall progressively into the housing cavity along the mating axis so that the first male contact portion passes through the second female contact portion and mates with the first female contact portion and the second male contact portion mates with the second female contact portion.