15. MECHANICAL ARM 



This unit, built by General Mills Corporation, is 

 basically their Model 150 mechanical arm modified for 

 use under high ambient pressures. The arm is located 

 in the forward field of vision beneath the forward ballast 

 tub. It is capable of operating in several axes in a circle 

 4 feet in diameter on the sea floor and can pick up 50 

 pounds of weight. The unit allows the scientists diving in 

 TRIESTE to obtain selected samples from the sea floor. 

 The arm is controlled by a pushbutton switch box inside 

 the sphere. 



16. CLOSED CIRCUIT TELEVISION 



The purpose of this system is to increase the field of 

 vision at the sea floor. The vidicon camera unit is 

 located beneath the entrance tube facing aft, and the 

 monitor unit is inside the sphere. The scientist can, by 

 looking at the monitor, determine the characteristics of 

 the bottom behind the sphere and also observe biological 

 activity. The monitor will be fitted with a small auto- 

 matic camera to provide scope photographs. Since the 

 TV camera has a light sensitivity better than that of the 

 human eye, it requires minimum illumination of the sea 

 floor. A switch- operated focusing arrangement permits 

 detailed inspection. Provisions have been made for a pan 

 and tilt unit, though it is not presently on board. 



17. SPHERE 



The Terni sphere was completely gutted, re-treated 

 for preservation, and rewired. This 2 0, 000-foot sphere 

 is more than adequate for the projected, local (San Diego) 

 diving program. The Krupp sphere was also stripped and 

 then sent to Mare Island Naval Shipyard for reconditioning. 



In the Terni sphere overhaul, emphasis was on a 

 more functional layout of the controls for the pilot to 

 leave more room available for the scientist. Also empha- 

 sized was standardization of panel size and power supply, 

 so that the various equipments needed by scientists with 

 different specialties could be interchanged rapidly. The 



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