. Elementary and dental radiography / by Howard Riley Raper . y Figure 361.—Overhead wiring system. 328 APPENDIX gives the usual green color.) Third, a small glass compression cylinderis attached as part of the tube. Fourth, the regulating chamber and thecathode end of the tube are connected with a special connection the func-tion of which connection is to allow just enough current to pass. Figure 362.— through it, and so through the regulating chamber, to keep the vacuum ofthe tube constant, i. e., to keep it from raising. It will be seen from the foregoing that the idea of the unit issimplif
. Elementary and dental radiography / by Howard Riley Raper . y Figure 361.—Overhead wiring system. 328 APPENDIX gives the usual green color.) Third, a small glass compression cylinderis attached as part of the tube. Fourth, the regulating chamber and thecathode end of the tube are connected with a special connection the func-tion of which connection is to allow just enough current to pass. Figure 362.— through it, and so through the regulating chamber, to keep the vacuum ofthe tube constant, i. e., to keep it from raising. It will be seen from the foregoing that the idea of the unit issimplification for the operator and indeed as long as all parts are in goodworking order radiographs may be made with it by simply posing thepatient and switching on the current for the proper length of time. Whenit becomes necessary to make some adjustments, however, the operatorwill then feel the need of the information set forth in the first one hundredpages of this book. X-RAY MACHINES 329
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