DE399838C - Film holder with handle, through which the film can be held in the mouth perpendicular to the X-rays - Google Patents

Description

The invention relates to improvements in film holders for x-ray imaging of teeth, in which the film is held in the patient's mouth with the aid of a holder at right angles S to the X-rays. at According to the present invention, the film holder is provided with the aid of a pivotable arm Constructively designed so that the patient as well as the photographer can watch the film

ίο can easily adjust in the mouth so that the Rays fall on the film at right angles under all circumstances. There is also another ■ very simple and cheap locking device created which in or out of the Movement path of the film holder can be moved to adjust the latter and in to lock the relevant position.

The subject of the invention is shown in the drawing.

Fig. Ι shows the constructed according to the invention Film holder with the film locking device in a perspective view.

Fig. 2 is a special representation of the film carrier locked in its set position.

FIG. 3 is a section taken along line 3-3 of FIG.

The handle 1 made of metal, bent in the form of a loop, is with his End parts bent over a filler strip and fastened with rivets. The filler strip settles just before the end parts and is cut off in front, around the dotted in Fig. 2 drawn sloping shoulders.

The handle could also be massive and forked at the front, limiting the invention So do not refer to the design details given here.

Rotatable between the ends of the hand

Claims (3)

handle sits on a rivet an arm 2, which has lateral projections 14, 15 with inclined surfaces in order to be supported with such in a right-angled position to the handle on the inclined shoulders of the filler strip. On the end parts of the handle there is a displaceable locking ring 3 which engages over that of the two projections 14, 15 which is just resting against one of the inclined shoulders of the holder ι fs. Fig. 21, in order to lock the arm 2 firmly in a right-angled position on the relevant side of the handle. At the end of the arm 2, a film carrier 4 is rotatably attached, against the vertical part 5 of which the film is to be stored. A projection 6 is attached to the side of this part 5 and provides the support for the lower edge of the film and merges into a flange 7 to hold the film against part 5. To the side of the flange 7 an extension 8 bends, which is to be brought into contact with the teeth j. so as to keep the film j in the patient's mouth during the X-ray exposure. A slide 9 is attached to the arm 2 which carries an extension J 10 slotted at 11, through which the guide and Ee- | movement limitation with respect to the film carrier a pin provided with a head 12 extends through it. If this slide 9 is moved inward on the arm 2, its front end moves under the lateral projection 6; the film can then be swung out to either side of the arm. If the slide on the arm 2 is moved outwards, the extension moves under the lateral projection 6 in order to then hold the film carrier rigidly in every position. The holder is expediently made of aluminum, as this metal is easily penetrated by the rays and thus the creation of shadows on the negative is avoided during the X-ray exposure. Practical tests have shown that it is very difficult to hold the film in the mouth at the right angle so that the image of the teeth or the negative shows exactly the tip (apex) of the teeth, because the means are not given with which the attitude of the film in the mouth, of the patient could really be determined. The subject matter of the invention now provides a device by means of which the patient can hold the film on the handle in such a way that it assumes a position in the mouth which enables all teeth to be accommodated. By placing the arm at right angles to the handle, the angle of the film within the mouth can be changed and held by the patient in such a way that no distortion of the negative image occurs, which would be the case if the film were not exactly at right angles to the Radiation tube would be held. According to the above invention, the film holder consists of one. Handle and an arm articulated to it. which can be adjusted and locked on both sides of the handle at right angles to this, whereby the arm itself carries a rotatable holder, which can be reversed by 1 way in order to hold the film for both upper and lower maintenance: special devices lock the holder on each side of the arm. Pa τε ντ-An S γ r ü c η ε: 1. Film holder with handle, through which the film can be ile vertically in the mouth X-rays can be held, characterized by a split in two perpendicular to the handle lockable arm (2), which together with the film carrier located at its end (4) can be pivoted by 180 in the plane of the arm. 2. Film holder according to claim 1, characterized in that the forked, the Arm (2) receiving end of the handle includes two inclined surfaces, on which there are corresponding inclined surfaces (14, 15), alternately place them in such a way that a ring (3) that can be moved on the handle the arm (2) in a right-angled position on each of the two sides of the handle (r) 10c able to lock (Fig. 2). 3. Film holder according to claim 1 to 3, characterized in that for locking and releasing the film carrier on the support arm (2) with an extension 10; (10) provided slide (9) is provided is, which under a lateral projection (6) of the film carrier (4) can be pushed to this in its places of use to lock. πι 1 sheet of drawings.