Patent Number: 053965337
Section: claims

1. In a primary radiation diaphragm for a radiation apparatus comprising a housing with at least one diaphragm plate adjustable in a plane perpendicular relative to a central ray of a radiation emitter, the improvements comprising a single mount being provided for the diaphragm plate, said single mount supporting the diaphragm plate at one side to be in said plane and being adjustable along a guideway so that the plate is free of any mount on a side opposite the one side. 2. In a primary radiation diaphragm according to claim 1, which has two diaphragm plates being arranged parallel to one another in the plane, and means for moving the plates oppositely adjustable to one another. 3. In a primary radiation diaphragm according to claim 2, which includes a second pair of diaphragm plates being provided in a plane parallel to the first pair of diaphragm plates, said second pair being mounted for movement in a direction offset by 90.degree. relative to the direction of movement of the first pair and means for oppositely adjusting the second pair relative to one another. 4. In a primary radiation diaphragm according to claim 2, wherein the guideway includes first and second guide rails being mounted on the same side of the housing of the primary radiation diaphragm, each mount of each of the pair of diaphragm plates having guide parts engaging the first and second guide rails. 5. In a primary radiation diaphragm according to claim 2, which includes a second pair of diaphragm plates being provided in a second plane extending parallel to the plane of the first pair of diaphragm plates, said second pair of diaphragm plates each having a single mount, means for moving the second pair of diaphragm plates in a direction extending perpendicular to the direction of movement of the first pair and opposite relative to one another, a first set of first and second guide rails being disposed on one wall of the housing, a second set of first and second guide rails disposed on a second wall extending at right angles to the first set, each of the mounts of the first pair of diaphragm plates having guide parts engaging the first and second guide rails of the first set and each of the mounts of the second pair of diaphragm plates having guide parts engaging the first and second guide rails of the second set. 6. In a primary radiation diaphragm according to claim 1, wherein the guideway includes a first and second guide rail being mounted on a single side of the housing of the primary radiation diaphragm, the single mount of the diaphragm plate engaging said first and second rails with guide parts and being movable therealong. 7. In a primary radiation diaphragm for a radiation apparatus comprising a housing with at least one pair of diaphragm plates adjustable in a plane perpendicular relative to a central ray of a radiation emitter, the improvements comprising means for mounting said pair of diaphragm plates comprising each plate being supported for movement in the plane by a single mount engaging only a first side of the plate, said mount being adjustable along a guideway mounted on one wall of the housing so that the plate is free of a second mount on a side opposite said first side. 8. In a primary radiation diaphragm according to claim 7, wherein the guideway includes first and second guide rails, each mount of each diaphragm plate having guide parts engaging the first and second guide rails. 9. In a primary radiation diaphragm according to claim 7, which includes a second pair of diaphragm plates being provided in a second plane extending parallel to the plane of the first pair of diaphragm plates, said second pair of diaphragm plates each having a single mount, means for moving the second pair of diaphragm plates in a direction extending perpendicular to the direction of movement of the first pair and opposite relative to one another, said guideway including a first set of first and second guide rails being disposed on said one wall of the housing, a second guideway formed by a second set of first and second guide rails disposed on a second wall extending at right angles to the first set, each of the mounts of the first pair of diaphragm plates having guide parts engaging the first and second guide rails of the first set and each of the mounts of the second pair of diaphragm plates having guide parts engaging the first and second guide rails of the second set.