Apparatus for detecting a connection between adjacent panels of a curtain wall

An apparatus for detecting a connection between interlocking connectors of adjacent vertical panels, each of the interlocking connectors having a connector member and a channel, the apparatus comprising:

• a first contact element positioned adjacent a bottom of one of the interlocking connectors;
• a second contact element positioned adjacent a bottom of the interlocking connector of the adjacent panel, said second contact element positioned in proximity to said first contact element when the interlocking connectors are connected together;
• a first conductive line connected to said first contact element;
• a second conductive line connected to said second contact element, said first and second conductive lines extending along a substantially entire length of the interlocking connectors so as to have an end adjacent to or outwardly of a top end of the interlocking connectors;
• a means for passing a current to at least one of said first and second conductive lines;
• and
• a detection means connected to one of said first and second conductive lines, said detection means for ascertaining the existence of an electrical connection between said first and second contact elements.