Patent GB-169150-A (GB)
Title: Improvements in and relating to apparatus for projecting light and other electro magnetic radiation
IPC: H05G1/02
Filed: 1921-08-19
Abstract: 169,150. Pieper, O. H., and Pieper, A. F. Sept. 15, 1920, [Convention date]. Light and other radiations, treating diseases with.-A self-contained cabinet apparatus for projecting light and other radiations, more especially for X-ray work, comprises a cabinet 20, Fig. 1, with a hinged door 22 and containing the electrical apparatus and a telescoping counterbalanced standard 30 supporting the light source, such as an X-ray tube 74, by a series of adjustable arms 46, 50, 60, a forked bracket 69, and a yoke 71 for the tube holder 73, Figs. 1 and 11, whereby the tube can be adjusted and held in any position. The supporting bracket 73 can be positioned in the yoke 71 for stereoscopic purposes. The high-tension cable 83 is supported by insulated struts 84, passes through an insulated guide 85, and is reeled off and on a spring drum inside the cabinet. The low-tension cable 80 is also suspended along the tube supporting arms and carries also the leads for heating the cathode filament of the tube. The standard 30 slides through rollers 32 in a U-bracket 28, Fig. 3. This bracket is supported by braced struts 25 secured to the base of the cabinet, and mounted at the upper end on a plate 23 fixed to the wall of the cabinet and supported by other bracebars 24. The lower end of the standard 30 carries rollers 35 engaging a guide-bar 34, and a cord 37 which passes over a pulley 38 and supports the counterbalancing weight 40 sliding on a guide-bar 42. The standard is clamped in position by a screw head 45, Fig. 1. The arm 46 is rotatably mounted on the standard 30, and is fitted with rollers 53. Fig. 7, for the sliding section 50 which is prevented from sliding right out by stops. The forked end 58 of the section 50 is graduated for positioning the pivoted section 60. The forked end 61, Fig. 11, of the section 60 carries a pivoted lug 63 which can be angularly fixed by a pin 66 and which carries the head 67 of the forked bracket 69 in a graduated socket 64, the angular position of the bracket being indicated by a pointer 68. The yoke 71 carrying the tubeholder 73 is pivoted on the bracket 69, and is are-shaped, Fig. 12, and fitted with slides 72 and notches 78, Fig. 11, so that the tube-holder 73 can be positioned by a spring-actuated head 77 in adjacent positions for stereoscopic purposes. A milliammeter 95, Fig. 2, a starting-switch 94, and an auto-transformer switch 91 are mounted on the top of the cabinet, and a time switch 100, Fig. 1, may be used for predetermined periods of operation. The transformers 110, 108, Fig. 16, for the coil and the cathode filament as well as the auto-transformer 104 and other circuit equipments are mounted inside the cabinet, the arrangement being diagrammatically illustrated in Fig. 16. The switch used comprises three contacts a, b, c, the contacts a, c, being connected to the time switch when used. The function of the third contact b is first to switch the resistance 111 in circuit with the high-tension transformer 110 through the contacts a, b, and subsequently to short-circuit it through contact c.