Patent GB-670289-A (GB)
Title: Improvements in roentgen apparatus
Inventor: NOSCHIS KAJ WILHELM WALTER
IPC: A61B6/00
Filed: 1948-05-11
Abstract: 670,289. X-ray apparatus. SCHONANDER AKTIEBOLAG, G. May 11, 1948. No. 11375/49. Divided out of a Specification left in respect of Applications 12941/48, 670,239 and 670,240, under which a Specification was laid open to inspection on Nov. 13, 1948. Class 98 (i). Apparatus comprising an X-ray source, an image receiver, a protective box to contain the patient between the X-ray source and the image receiver, is characterized in that the rear part of the box, preferably including adjacent portions of the side walls, is horizontally movable relative to its front part. A feeler member may be movably mounted in the rear part to contact the patient's back. Movement of the rear part may effect film change when a photographic camera is included to photograph the image on the screen. The camera, when included, may be removable as a unit. As shown, Fig. 1, the two parts of the box are mounted on a flat base 1, and each consists of two separable units. One part comprising units 11, 12 is fixed, while the other part comprising units 13, 14 slides on rails 7 mounted on the base towards and away from the fixed part, and forms an enclosure for the patient with the front part when moved thereagainst. An X-ray tube 2 is supported on a column 3 fixed to the base to project into an opening in the movable part. A movable platform 21, of the kind set forth in Specification 12941/48 (as open to inspection under Sect. 91), is housed in the front part. A cord 16 fastened to the frame of the platform 21 passes over pulleys 17 and carries a weight 19 (which may be replaced by a spring) at its free end. A pointer 15 is positioned on the card according to the patient's height to assist the operator in adjusting the height of the platform. A rod 73, which may be journalled in the rear part of the box, has arms 74 between the outer ends of which a cord 72 is stretched. When the rear part is advanced, the card contacts the patient's back and turns rod 73, which carries a pointer 75 moving over a scale outside the box to indicate the thickness of the patient's chest. The pointer deflection may be conveyed to operate means controlling the time of exposure or the X-ray intensity. Alternatively, a rod mounted in the rear part may be urged endwise against the patient's back; the length of rod protruding through the box gives a measure of the thickness of his chest. When the rear part is moved back, a hook thereon may engage a wire connected to the film wind in the camera (if any), releasing it when the film is wound. Alternatively, a projection 84 on the rear part may engage a lever 82 pivoted to the base, operating the film wind. The camera, when fitted, is enclosed in a casing 6 and is of the kind set forth in Specification 670,240, and photographs a fluorescent screen 4. The patient's data card is placed in a holder 97 in the field of the camera and illuminated by a lamp in a housing 91 through a shutter which is opened when the X-ray exposure is made, so that the card and the screen are simultaneously photographed on the same film. Only the upper part of unit 6 has much lead protection. The unit 6-is detachable, and may be carried as by a resilient transport track.