DE439297C - Apparatus for producing X-ray fluoroscopy and images in quick succession - Google Patents

Description

GERMAN EMPIRE

ISSUED JANUARY 8, 1927

REICH PATENT OFFICE

PATENT LETTERING

M 439297 CLASS 57a GROUP 7

(V18890IXI57a)

Veifa-Werke Akt-Ges. in Frankfurt a. M.

Device for producing x-ray fluoroscopy and images

in quick succession.

Patented in the German Empire on January 27, 1924.

Around parts of the body that have been x-rayed several times in a row immediately after the x-ray To be able to record, disk cartridges are in use, which allow four recordings. The four quarters one and the

same plate are presented one after the other by corresponding edges of the plate cassette brought the aperture. Viewing the pictures is made difficult by their canted Location on the plate. In addition, one wishes

in many cases, to take more than four pictures in quick succession.

The shortcomings of the known device are remedied in the simplest manner by means of the invention that a roll film cassette is used which, after each fluoroscopy for the purpose of effecting the recording, is quickly pushed in front of the panel in a guide limited by stops and after the recording away from the panel the side is pulled. While another fluoroscopy is being done, a new piece of film is placed in front of the bezel of the cassette. Since all handling takes place in the dark, proper actuation of the roll film by means of known devices is not possible. The roll film cassette is therefore provided with a SperrvorrichtuHg for the film according to the invention, consisting of a spring into an opening of the ^film: is incident button which the film at the incident ■ at its other end 'locks take-up roll.. By this automatic blocking of the film in its respective rieh-; The set-up time for a new recording is kept within the smallest limits. Any number of X-rays and recordings can therefore be made quickly one after the other, so that movement and processes of the gastrointestinal canal, movements of the diaphragm, the heart, or the like can be recorded continuously on the film tape.

In the drawing, the new device j is shown in Fig. 1 in a perspective view represents.

Fig. 2 is a longitudinal section through a | slightly less than the usual arrangement modified roll film cassette.

FIG. 3 is a longitudinal section through taken perpendicular to the section of FIG the cassette.

It is ι a protective plate with aperture cutout 2, which on the luminescent screen 3 of the _; Fluoroscopy and recording device, is attached. The protective plate 1, which is impermeable to X-rays, can be clamped to the frame 3, for example by means of clamps 20. Guide strips 4 and stops 4 'are provided on the plate 1. The cassette 5, which is provided with corresponding guide surfaces, is displaced on the guide strips. The stops 4 'limit the stroke of the cassette and have the effect that it quickly and reliably assumes the correct position in front of the panel cutout 2 when it is picked up. The I ^: cassette is moved using the handle 6.! After the recording has taken place, the cassette is pulled into the position shown in Fig. 1. 'In this position of the cassette, the film is ι by means of the wing screw 7 in a known; Way moved forward. Since this ER in the dark (to follow, a special device is provided which provides the guarantee that the film j is advanced by the correct amount. <To this end the film is provided on the edge in the image size corresponding intervals with holes 8. A pin 9, which is arranged on a spring 14 rotatable at 10, can be placed in these holes the ratchet wheel 12. As soon as a hole 8 comes under the pin 9 when the ratchet wheel 12 is rotated and the film moves forward, the pin 9 enters the hole; the spring 14 rotates around the pivot point ίο, and the ratchet tooth 11 the spring settles in the teeth 13, so that further movement of the ratchet wheel 12, to which the wheel with the teeth 13 is attached, is not possible aube 7 whose cone 15 presses against a pin 16 on the spring 14 and whose tooth 11 thereby lifts out of the teeth 13, the film can be rotated further.

While a new piece of unexposed film was placed in front of the aperture of the cassette is, by means of the LeuchtscMrmes 3, the fluoroscopy is optionally carried out by a made by another person. Immediately after the end of the fluoroscopy, the film cassette can be pushed in front of the aperture 2 and a new recording can be made.

Claims (1)

^Claim : 1o ° Device for the production of X-ray fluoroscopy and recordings in quick succession, indicated by a between the luminescent screen and the with Aperture-provided protective plate consisting of a displaceable roll film cassette with a locking device for the film from a resiliently falling button into an opening of the film, which when it falls locks the film take-up roll with its other end. 1 sheet of drawings.