Abstract: An X-ray tube is movable between a minimum distance from an image receptor and a maximum distance. Signals are generated representative of the X-ray tube focal spot-to-image distance (SID), the peak kilovoltage (kVp) that is to be applied to the X-ray tube anode during a fluorographic exposure and the desired brightness of the X-ray image. The signals are processed in a manner that results in a control signal being developed that adjusts the X-ray tube filament current in a way that produces an X-ray tube current (mA) during the exposure which results in a constant limited X-ray dose rate at the X-ray beam entrance plane of a patient at any permissible kVp and SID setting and assures that the dose rate limit will not be exceeded at minimum permissible SID regardless of the selected kVp.

Abstract: The isocenters of two independent frontal and lateral viewing X-ray systems are made coincident using an X-ray permeable target frame that has congruent crosshairs defined by X-ray impermeable lines on opposite side walls. A small steel ball is located in the frame between side walls on a line running from the intersection of one set of crosshairs to the other. A television display of the X-ray image of the ball resting on the patient supporting table top with the frame leveled and of the crosshairs with the frontal system having the central ray of its X-ray beam vertical and then horizontal and with X-ray impermeable crosshairs on the image receptor permits shifting the frame until the crosshairs on it and on the receptor are coincident with the ball and the isocenter in vertical and horizontal orientations. The procedure for establishing the isocenter of the lateral system is comparable.

Abstract: Collimator for regulating the shape and size of the pattern of radiation projected on a radiation detector from a radiation source, particularly for regulating the beam of radiation in a medical diagnostic x-ray machine. One or more (preferably three) longitudinally stacked plates are provided, the top plate having a large aperture, the middle plate having a medium sized aperture, and the lower plate having a small aperture. The middle and lower plates are provided with means to substantially open up their apertures, rendering these plates inactive when they are not in use. Each plate is longitudinally movable between first and second extremities of travel, the first extremity being nearest the radiation source. When each plate is at its first extremity of travel the beam of radiation has its maximum size.

Abstract: A device for handling a group of cables running to medical x-ray equipment that is movable in all degrees of freedom comprises: A vertical axle mounted overhead; a boom swingable in a horizontal plane on the axle; a housing on the axle having openings for receiving and clamping the ends of respective flexible cable enclosing tubes, one of which extends over the boom to the equipment and the other of which establishes a cable path continuing to a swivel mechanism that is spaced from the axle and mounted overhead.

Abstract: There is disclosed a composite web of pressure sensitive labels and method of making and using same. The composite web has a web of supporting material and a series of two-part labels releasably secured by pressure sensitive adhesive to the supporting material web. One part of the label is detachably connected to the other part by a line of partial severing. The adhesive is preferably coated onto only the one label part and the other label part is preferably free of adhesive. The label parts that are adhesive-free are detachably connected to each other by frangible portions which prevent the adhesive-free label parts from moving away from the supporting material web until the labels are delaminated from the supporting material. There is also disclosed method of making such composite webs and method of using such composite webs in label printing and applying machines.

Abstract: There is disclosed a composite web of pressure sensitive labels and method of making and using same. The composite web has a web of supporting material and a series of two-part labels releasably secured by pressure sensitive adhesive to the supporting material web. One part of the label is detachably connected to the other part by a line of partial severing. The adhesive is preferably coated onto only the one label part and the other label part is preferably free of adhesive. The label parts that are adhesive-free are detachably connected to each other by frangible portions which prevent the adhesive-free label parts from moving away from the supporting material web until the labels are delaminated from the supporting material. There is also disclosed method of making such composite webs and method of using such composite webs in label printing and applying machines.

Abstract: There is disclosed a composite web of pressure sensitive labels and method of making and using same. The composite web has a web of supporting material and a series of two-part labels releasably secured by pressure sensitive adhesive to the supporting material web. One part of the label is detachably connected to the other part by a line of partial severing. The adhesive is preferably coated onto only the one label part and the other label part is preferably free of adhesive. The label parts that are adhesive-free are detachably connected to each other by frangible portions which prevent the adhesive-free label parts from moving away from the supporting material web until the labels are delaminated from the supporting material. There is also disclosed method of making such composite webs and method of using such composite webs in label printing and applying machines.

Abstract: A device for aligning the central ray of an x-ray beam with the center of an image receptor comprises a metal tube in a mounting which is provided with means for establishing the axis of the tube perpendicular to the plane of the image receptor or other plane which is perpendicular to the central ray. The tube is mounted in such manner that the region around it is x-ray permeable. The mounting is adapted for being moved in parallelism with the plane such that alignment of the central ray with a point on the receptor may be determined when the circular shadow cast by the outside of the tube is concentric with the circular image of the tube bore.