. Radiography, X-ray therapeutics and radium therapy . stment, 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 solid 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
. Radiography, X-ray therapeutics and radium therapy . stment, 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 solid 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 anyposition 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.
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Keywords: ., bo, bookauthorknoxrobert18681928, bookcentury1900, bookdecade1910
