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3 revisions | Wjhoward at Mar 17, 2017 07:36 PM | |
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96 Number of panels in the lens apparatus. Eight Number of prisms of each panel above dioptric drum or central belt of the lens. Eighteen Number of prisms of each panel below dioptric drum or central belt of lens. Eight Pedestal. Iron Service table. Wooden service table in watchroom. Tube leading through the center of the upper metal ring of the lens into the cowl, to carry off the gases of combustion and to assist in producing a proper draught in the lantern—of what material, diameter, and how fitted and connected with damper tube when in place. If revolving, revolving machinery. Revolving cord or chain—how led. Length of drop tube. Length of time revolving machinery will run after being wound up. | 96 Number of panels in the lens apparatus. Eight Number of prisms of each panel above dioptric drum or central belt of the lens. Eighteen Number of prisms of each panel below dioptric drum or central belt of lens. Eight Pedestal. Iron Service table. Wooden service table in watchroom. Tube leading through the center of the upper metal ring of the lens into the cowl, to carry off the gases of combustion and to assist in producing a proper draught in the lantern—of what material, diameter, and how fitted and connected with damper tube when in place. If revolving, revolving machinery. Revolving cord or chain—how led. Length of drop tube. Length of time revolving machinery will run after being wound up. |