It is important that an electrolytic interrupter should be  connected correctly, the platinum to the positive pole of the  source. If connected otherwise, the platinum will gradually  Induction-coils have been already referred to in the intro-  duction to this chapter, and some of the conditions of their  working discussed. We do not propose to enter into any  detail of their theory or construction, since those will be found  sufficiently described in any modern text-book on electricity.  (A few notes on their practical working are appended to this  chapter for the convenience of workers not familiar with  them.) The coil forms, however, a most important part of  an X-ray installation, and it is advisable that every operator  should make himself thoroughly acquainted with its theory  and practical working. For our present purpose it is sufficient  to recall that its function, broadly speaking, is to raise or  dissolve, or possibly fuse if thin, and the coil will not work  well. If the direction of current be correct, the sparks in the  interrupter have a red colour; if wrong, they have a blue  colour. Litmus-paper can, of course, give us the necessary  indication before connection is made, the positive pole making  a red stain on the moist paper, as described in the section on  the charging of accumulators.

On the Continent electrolytic interrupters are used com-  monly, but in conjunction with coils specially made to suit  them. The chief check to their use here is the heavy  mortality amongst tubes, most of which can stand the heavy  current transmitted for a very brief period.

No related posts.