efficient operation, maintenance, and repairs (figs. 2 and 3). The stainless-steel junction 

 box, located directly below the aluminum camera case and supported by the light steel 

 frame, serves to hold the protected flash tube, aluminum reflector, and the oil-filled 

 tripping switch. A thick-walled stainless steel tube connecting the box and camera case 

 carries and protects the necessary electrical wires. A mechanical tripping device, which 

 employs a free-swinging lead weight, is attached to the frame below the junction box 

 to activate the electrical tripping switch. Operation of this switch by bottom contact at 

 30-second intervals permits at least 24 successive photographs to be taken on a single 

 lowering of the camera. Figures 4 and 5 show the electrical components and self- 

 explanatory circuits employed. Detailed plans and specifications of the equipment are 

 available upon request. 



CAMERA CASE 



ROBOT CAMERA 



f 2.8 



30 MM LENS 



CONNECTING TUBE 



Figure 2. Camera and power supply unit in camera case. 



