Abstract: A method for scanning a plurality of optical measuring reflectors adapted to reflect a scan beam in a position-related manner to a position detector, which supplies signals relating to the position of the beam incidence point in the detector plane. So far a separate scan beam has been generated for each measuring reflector and there has been a separate position detector for use therewith. In accordance with the invention a single common linearly polarized scan beam L1 and a single common detector D are provided and by turning the plane of polarization of the scan beam under electronic control and by the use of further optical means the scan beam is switched over as desired to a selected measuring reflector, which then reflects the incident scan beam to the common position detector D in position-related manner.

Abstract: A rig puller for removing rings from shafts to which they are affixed. The puller is formed by a steel heat accumulator ring having a slot separating the ring into a band having separated ends. An electrical conductor extends between the ring ends, and a clamping device is provided to force the ring ends towards each other about a ring to be removed. By utilizing steel which as compared to most metals and more particularly aluminum has relatively low specific heat and thermal conductivity, the ring may be efficiently heated inductively and used immediately to effect expansion of the ring to be removed without requiring cleaning where the accumulator ring had been heated in an oil bath or the like as previously.

Abstract: A method for checking the coaxial alignment of tandem-arranged shafts involving the detection of a coaxial in-line or an offset state of the said shafts. In different angular positions of measurement two independent signals are produced related to any parallel offset and any angular offset of the shafts respectively. In the known methods the angular positions of measurement are bound by a mutual angular spacing of 90.degree.. This leads to problems if there are obstructions in these angular positions of measurement of the device used for measuring. The method in accordance with the invention makes possible alignment checking operations using freely selectable angular positions of measurement.

Abstract: An electro-optic device for constantly monitoring the relative position of two machines or parts of machines has in a known manner a beam transmitter (10) that transmits a light beam (L) and a light receiver (11) which receives the light beam in conditions depending from the relative position of the machines or parts of machines and generates electric signals with position parameters processed in a computer from which various data partially deduced from the position parameters can be requested. An electric signal with an intensity parameter is obtained from the position parameter signals. The intensity parameter is applied in the computer (15) for cyclically requesting the data obtainable from the computer, thus allowing an easy remote operation of the data requests by arbitrarily interfering with the light beam (L) or with the reflected light beam (L').

Abstract: A measuring instrument for determining and evaluating data representative of the condition of a machine provided with measuring points is provided with a test data probe, incorporating a test data receiver and an evaluation circuit with memory for picking up and evaluating the test data received from the relevant measuring points, and with an identifying data sensing probe incorporating a sensing unit for sensing identifying data at the measuring points. The memory includes storage positions for data specific to the measuring points which are activated by the corresponding identifying data from the measuring points. The test data probe and the identifying data sensing probe are provided in a common housing. Within the common housing there is a measuring chamber which is open towards the forward end of the measuring head of the instrument, the chamber accommodating a machine-side data transfer component which is also the carrier for the identifying data specific to the measuring points.

Abstract: Device intended to determine whether two shafts arranged one behind the other are aligned or parallel or whether they are offset with a certain angle. The device employs a light beam S, S' and a mirror prism (6) or any other optical system and displays separately the alignment errors directly as a function of the parallel displacement and of the angular displacement. It may be used to align shafts and/or monitor permanently the alignment state of the shafts (3, 4).