In an operation microscope (1) with an integrated navigation system (3), the control of the navigation system (3) takes place by means of an operating unit (5, 7, 9) that can be operated directly from the operation microscope (1) and which acts on a navigation system control menu (11) that is reflected into the visual field of the operation microscope (1).

For the use of an Operation Microscope, in computer-supported stereotactic surgery, a set of preoperative diagnostic data of a patient is first generated by means of an image-forming preoperative diagnostic procedure. The surgeon then plans the operation path on a central control unit and determines which of the stored diagnostic images are to be reflected into the observation optics of the operation microscope. During the operation, the operation microscope, arranged on a motorized support syst...

The elongated, hollow, thin-walled metal shaft of an operation endoscope is lined internally throughout its length by a separate thin-walled sleeve of electrical insulating material, the shaft and sleeve being mounted removably on a common head independently of each other in such manner that they are separable by relative longitudinal movement in the direction by which the sleeve is retracted rearwardly relative to the shaft, thereby affording retraction and replacement of the sleeve without rem...

An apparatus is provided for initiating the operation of a device by requiring plural actuations of a coin-controlled reciprocating operating handle. A rail, which includes a pawl affixed thereto, is reciprocated by the operating handle. A ratchet having a plurality of teeth is rotatably mounted on an operating shaft in operative relation to the pawl. An operation-initiating disc member is fixed relative to the shaft and is coaxially mounted relative to the ratchet. The ratchet and the operation...

Method of operating a quarry area comprises the steps of advancement of excavation such that a central trench is first provided for receiving overburden from adjacent strips to both sides of such trench. When the operation in the quarry is completed, a plurality of elongated spoil ridges are left with the valleys between the ridges providing solid ground for access roads to a further quarry area subsequently opened to one end of the depleted area. The method also facilitates the handling of over...

An electrically driven dryshaver has a shear system composed of an outer shear element and an inner shear element which cooperates with the outer shear element and at least one of these elements is driven for movement with reference to the other. The shear elements are biased into abutment with a force in excess of 4 kg/cm.sup.2.

A method of performing an operation on a workpiece comprising the preparatory steps of simultaneously positioning and clamping a workpiece by a bearing surface thereof onto a receiving surface of a clamping body with the aid of complementary positioning devices provided in the bearing surface and receiving surface and which enable the workpiece and the clamping body to be clamped together. The clamping body has, at a predetermined position relative to its positioning devices, reference features ...

A surgical operation table has a platform with a main section and an end extension section removably fitted adjacent an end of the main section. The extension section has a pair of support arms removably engageable in complementary sockets secured to the main section. At least one of the sockets has a spring locking plate which is engageable with a support arm inserted in the socket to prevent the arm being withdrawn from the socket. Means are provided for disengaging the locking plate from the ...

A surgical operation table has a patient supporting surface supported on a column on a movable base. The base has a plurality of feet which can rest on the ground to support the base in a fixed position. The base can be moved on running wheels which are movable with respect to the base to and from a position in which they are engaged with the ground, and the feet are clear of the ground. A support frame is displaceable with respect to the base to move the running wheels into the position in whic...

An operation microscope comprising an objective lens, a pair of magnification power changing lens systems, a pair of eye lenses, a camera body, a first illumination system for illuminating a part of a patient's body for observation, a second illumination system for illuminating the part of the body for photographing. Said second illumination system includes a light source for photographing which is positioned behind said objective lens and at a side of said pair of magnification power changing l...