Surgical operating lamp

Claim 1

In a suspended surgical lamp having a hollow annular lighting body including a transversely extending lower surface, a plurality of light sources within said lighting body facing said lower surface, said lighting body having transparent portions at positions aligned with respective light sources in its lower surface to allow passage of visible light from said sources, an individual first visible light reflector disposed about each of said light sources to reflect visible light rays towards said transparent portions of said lower surface and to transmit infrared radiation therethrough, second infrared reflectors which are transparent to visible light positioned between said light sources and said transparent portions to reflect infrared rays emanating from said light source away from said transparent portions, the improvement wherein said lighting body further comprises concentric inner and outer bell shaped members surrounding all of said light sources and facing said transverse lower surface, said inner bell shaped member being joined at its periphery to said annular lighting body to form with said transverse surface a closed chamber and absorbing infrared radiation from said first and second reflectors, said outer bell shaped member having upper and lower openings facing said inner bell shaped member and being spaced from said inner bell shaped member to form a chimney such that said lower opening allows air to enter between said inner and outer bell shaped members for convection flow upwardly therebetween by absorbing heat from said inner bell shaped member, for discharge from said upper opening to maintain said outer bell shaped member relatively cool.