File:Radiography, x-ray therapeutics and radium therapy (1915) (14734523406).jpg

Identifier: radiographyxrayt00knoxuoft (find matches)
Title: Radiography, x-ray therapeutics and radium therapy
Year: 1915 (1910s)
Authors: Knox, Robert, 1868-1928
Subjects: Radiography Radiotherapy X-rays
Publisher: London : A. & C. Black
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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ustment, which is fittedby means of a bracket, with a vertical rack-and-pinion movement attached toa wooden upright, which in turn should be mounted on a sohd metal base,not a wooden one, so as to make a stable and fairly rigid apparatus. Alladjustments can then be conveniently made. An elaboration of this is thepillar tube-stand, suitable for use with much larger outfits and for all kindsof work. Description and Use of Pillar Stands.—The pillar stand (Fig. 61)consists of a solid pedestal with castors, which carries a vertical column of 62 THE PILLAR TUBE-STAND 63 steel tube. An adjustable sleeve, to which one end of the wire is secured,is mounted on this column. The wire runs over a pulley, and carries amovable lead weight inside the steel tube, which serves to balance the tube-box and the whole movable system. The sleeve can be locked in anvposition by the lever. The pulley is secured to a ball-bearing, and canrevolve freely round the top of the column. The sleeve has a horizontal
Text Appearing After Image:
Fig. 61.—Pillar stand, protected tube-box and accessories. (Siemens.) arm, which carries a second sleeve. In order to avoid a displacement ofthe sleeve in the longitudinal direction of the arm, the latter has a grooveat the end, which engages the screw of the lever. The tube-box is hingedto the sleeve in such a manner that it may be revolved horizontally throughan angle of about 90°. In order to fix the position of the angle, there is acircular slot above the hinge, through which travels the screw of the lever.If, now, the lever is turned to the right, its head is firmly pressed against the 64 EADIOGRAPHY slot, and thereby prevents any further rotation of the hinge. The sleeve,together with the tube-box, can be turned radially to the arm. The sleeveis locked by tightening up a screw by means of the lever, so that the sleevepressed on to the arm. Thus, the tube-box can be moved as follows : is (a) up and down ; (6) round the column ; (c) round the arm ; (d) throughan angle of 90° r

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