. Radiography and radio-therapeutics . Fig 13.—Dreaduouglit inter-rupter. 26 RADIOGRAPHY paid to the cleanliness not only of the interrupter but also of the motor,and especially of the commutator and oil cups. To fill the interrupter withgas, one tap is connected to the gas supply by a rubber tube and the othertap is left open for a few moments in order to expel the air. The gas jetmay be ignited and allowed to burn mitil all air has been expelled This is. Fig. 14.—Dreadnought interrupter showing detail. A, Container. F, Shaft bearing. B, Jet. H, Oil cups. C, Contact teeth. K, Motor ,
. Radiography and radio-therapeutics . Fig 13.—Dreaduouglit inter-rupter. 26 RADIOGRAPHY paid to the cleanliness not only of the interrupter but also of the motor,and especially of the commutator and oil cups. To fill the interrupter withgas, one tap is connected to the gas supply by a rubber tube and the othertap is left open for a few moments in order to expel the air. The gas jetmay be ignited and allowed to burn mitil all air has been expelled This is. Fig. 14.—Dreadnought interrupter showing detail. A, Container. F, Shaft bearing. B, Jet. H, Oil cups. C, Contact teeth. K, Motor , Screw. seen to be completely driven out when the flame is yellow m colour. (Ifair is allowed to remain in the receptacle and the interrupter allowed torotate, then an explosion takes place which may seriously damage the parts.)This tap is then closed and the other connected to the gas supply left open,and advantage taken of the pressure from the mains. If there is no handy
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