The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14754415671)

Identifier: americanjournroen08ameruoft (find matches)

Title: The American journal of roentgenology, radium therapy and nuclear medicine

Year: 1906 (1900s)

Authors: American Radium Society American Roentgen Ray Society

Subjects: Radiotherapy X-rays

Publisher: Springfield, Ill. C.C. Thomas

Contributing Library: Gerstein - University of Toronto

Digitizing Sponsor: University of Toronto

Text Appearing Before Image:

the opening in the dia-phragm, it becomes a serious danger to boththe patient and the operator. As a step towards overcoming these dan-gers above described. I have made use ofopac(ue rubber which contains approximately25 per cent of lead and which has an insulat-ing value equivalent to a 4 inch spark. Thatis, it will force a spark to leap around theedge for a distance of 12 inches beforepuncturing the rubber. But since the distancefrom the terminal of the tube to the topof the rubber is only 8 inches the actualinsulation value is only about 4 inches, be-cause the current tends to creep along therubber to about one half the air spark re-sistance. The rubber is about 3 millimetersthick, and is sold as Hercules red rubberpacking. A piece of this rubber, 12 inches by18 inches, is attached to the base of thediaphragm and is then curved over the ends g-i, anl t the Midwinter Meeting of the Eastern Section ofAtlantic City, N. J.,January 28, 29, 1921. 240 A New Device for Increased Protection

Text Appearing After Image:

Fig. a (above). Lateral View, showing the opaquelead rubber curved aliout the ends of the tube andclosing off the line of radiation through the open-ings in the tube, (i) The opaque rubber. (2) Re-inforcement layer. (3) Springs and hooks holdingthe top of the lead rubVier together across the topof the lead glass shield. Fig. B (middle). Front view of protective shield. Fig. C (beloz^). Top view of protective shield. of the tubes and the wires, and is folded backtowards the glass bowl so as to cover boththe front and the back and at the same timeto carry the wires upward 8 inches. The cen-tral portion of this rubber directly in frontof the terminals of the tube is reinforced byanother thickness of this rubber, 6 inches by6 inches, which increases the insulation andincreases the protection against the roentgenray. The upper ends of this rubber arefastened together by cords and small hooksso that they can be easily released whenit is necessary to change the tube. The chang-ing of tubes i

the american journal of roentgenology radium therapy and nuclear medicine 1906 book illustrations medicine x ray roentgen rays medical devices medical therapy images from internet archive canada

1906

University of Toronto

http://commons.wikimedia.org/

public domain