A leveling mechanism comprising two eccentrics rotatably mounted around the mounting shaft of a suspension system that supports an X-ray head. Respective wrenches for such eccentrics are mounted to the suspension system and may cooperatively engage their respective eccentrics to facilitate leveling of the suspension system in order to prevent drifting of the X-ray head.
A tension adjusting device for rackets. The system allows the player to adjust the tension of a number of strings while in the course of a match. By rotating a device having an offcenter hole and irregular sides the string which through it passes is extended or allowed to contract thereby providing a difference in the play of the racket.
A movable X-ray examining device has an X-ray tube unit which is connected by a horizontally extendable arm swingable in horizontal direction with a stand located upon a carriage. The device is particularly characterized by supports movable sidewise out of the carriage and a locking device cooperating with the arm and the supports and permitting the pulling out of the arm only when the supports are fully moved out and permitting the return of the supports only when the arm is pulled in.
A dental x-ray diagnostic installation comprises x-ray apparatus containing x-ray generator and x-ray tube having a hollow anode in the form of applicator for insertion in the interior of a patient's mouth. In order to facilitate the construction and handling of the apparatus in particular the insertion of the applicator in the mouth, the x-ray apparatus is designed as a unit capable of being positioned on a table or on a wall and contains a stationary member or part, which supports a horizontal axle which pivotably connects a housing containing the x-ray tube and the applicator on the stationary member for pivotable movement therewith. In addition, the installation includes a bite-on part which has a bite piece and a sleeve, which telescopically receives the applicator and enables the patient to locate the applicator in the desired position within the mouth.
For the purpose of stably securing an apparatus to be installed by a simple process, a positioner for securing to a floor an apparatus having positioning holes for receiving therethrough anchor bolts implanted upright in the floor, the positioning holes having a diameter substantially larger than that of the anchor bolts, comprises: a first cylindrical bushing member 21 having at an eccentric position a through hole 21c of a diameter for rotatably fitting one of the anchor bolts; and a second cylindrical bushing member 20 having at an eccentric position a hole 20c of a diameter for rotatably fitting the first bushing member 21, the second cylindrical bushing member rotatably fitting in one of the positioning holes provided in the apparatus to be positioned.
