Patent GB-632916-A (GB)
Abstract: 632,916. Rontgen-ray apparatus. PHILIPS LAMPS, Ltd., and GRAY, W. R. April 5, 1944, No. 6380. [Class 98 (i)] The apparatus comprises two units, one consisting of the ray-tube mounted on its hightension generator so as to be adjustable into either of two aligned positions, and the other of a housing containing radiographic camera and fluorescent screen, accommodation for a wheeled control trolley therebelow, and means for supporting the subject to be X-rayed. In apparatus intended both for ordinary radiography and miniature radiography in which a reduced photograph is taken of an X-ray image on a fluorescent screen, the tube-support of the first unit has provision, such as that described in Specification 632,914 for displacing the tube into either of its operative positions, and the second unit has alternative means for the two kinds of radiography. Such apparatus may also have a spot-light projector as described in Specification 632,914 for verifying the alignment of the ray-tube, and also means as described in Specification 632,915 for automatically masking the X-ray beam to the extent appropriate to each position of the ray-tube. As shown, one unit comprises a transformer casing 10, Fig. 1, supporting the ray-tube 8 as described in Specification 632,914 for two-position use; and the other unit comprises a housing 1 into which can be run on detachable ramps a wheeled trolley 2 having a control panel behind which is supported a ventilated casing containing the control devices, an instrument panel 7 behind which is supported an instrument casing, a drawer 15 for accessories, and a manipulating handle 16, which housing at its upper part 3 constitutes or contains a light-tight enclosure extending between a camera 4 and a fluorescent screen 5, Fig. 2, facing the ray-tube. The electrical connections between the trolley 2 and the transformer housing 10 are made by plug-and-socket connections on the side of the trolley facing the housing 10 and a flexible cable beneath a ramp platform 11 disposed between the two units; the plug-and-socket connections may be provided in known manner with a safety shutter which prevents coupling unless the control switches are in the " off " position. A platform 26 for the patient is mounted on the housing 1 so as to be adjustable in height, as by means operated by an electric motor in the housing 1 under control of a handle 34, so that the patient, gripping handles 31, may rest his chin on a support 30. A holder 33 is provided to receive data cards relating to individual patients for miniature radiography, the card being illuminated and photographed on the same film space as the image on the screen 5. Data common to all patients may be similarly recorded from a card placed in a holder 32, or alternatively by interposing a transparency bearing them between the camera 4 and screen 5. For ordinary radiography a cassette holder (Fig. 7, not shown), provided. with slideways for the cassette, is supported on pins 37 so as to cover the screen 5, and at its lower end rests against or is anchored to the housing 1. An aligning target may be temporarily mounted on this holder for use with the spot-light projector referred to above. The two units may have wheels or castors for manoeuvrability, with jack systems for immobilizing them in set position. The housing 1 serves to protect the control operator from the X-radiation, and a separate screen 12 with lead-glass window 13 protects the operator who poses the patient.