APPENDIX C 



A small handle placed on top facilitates carrying the box 

 and is of utmost importance in lowering the camera 

 by means of a rope, to the diver. 



On the right side of the case is the lever which controls 

 the starting and stopping of the camera. The lever shown 

 in the photograph is one long bar of an elongated U which 

 is pivoted in the side of the camera at the base of the IT. 

 The other and inner long bar of the U is forked at its 

 distal end and fits about the starting button of the 

 camera. To make this possible, the starting button sup- 

 plied with the camera was removed and one shaped like a 

 flattened spool was installed in its place. Thus, when the 

 outer lever is pushed downward, the starting button also 

 moves down and the camera photographs. When it is 

 pushed upward the camera stops. 



Because the starting lever does not move more than 

 ^ of an inch at its outer end, it was decided that all the 

 motion could be taken up by utilizing the stretching 

 qualities of a large disk of heavy rubber, and that it was 

 unnecessary to make a stuffing box to avoid leaks at the 

 joint. This disk, as can be seen in the photographs, was 

 held in place by a brass ring, and firmly cemented to 

 the case at its periphery. At its center, it is cemented 

 between and held in place by two large flat washers, 

 the lowermost of which is part of the bottom of the U. 

 Thus when the starting lever is moved downward the 

 rubber merely stretches a little around the circle. This 

 joint, as can be seen, is simple and fool-proof, the only possi- 

 bility of a leak being through the rubber, and when two 

 sheets are used the likelihood of this happening is not very 

 great. 



As the camera box is not a perfect rectangle, having 

 protuberances such as starting buttons, finders, etc., it 

 does not fit the box exactly. To prevent the camera 

 rattling, thick pieces of rubber, an inch wide and half an inch 

 thick and as long as necessary, were inserted on the sides 



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