Abstract: The proposal is for a process and device making it possible to determine the condition of one or more machines (3) at several measuring points by means of a measuring head (MK) with measurement transducers (MW) which can be releasably fitted there and to supply to a computer the relevant measurement signal together with the characteristic data therefore obtained at the measuring point concerned. The invention lies in the special nature of the obtaining of the characteristic data.

Abstract: An accelerometer is comprised of a piezo element for producing an electrical signal. A seismic mass is located around the piezo element and has a center of gravity located below said piezo element. A support is provided for supporting the piezo element and the seismic mass. A housing cooperates with the support to enclose both the piezo element and the seismic mass. An electrical conductor is provided to conduct the electrical signal produced by the piezo element to a point outside of the housing.

Abstract: Holding device for magnetically mounting a contact sensor on a curved magnetic surface, for example on a pipeline or on a housing of a bearing, comprising at least two movable pole shoes having the same poling and, in the neighbourhood thereof, a plunger-like pole shoe with opposite poling. The plunger-like pole shoe is displaceable relative to the other pole shoes and the magnets and, upon contacting of the holding device is displaced towards the mounting surface by the magnetic force.

Abstract: A process and a device for the remote interrogation of measuring points is offered that form at least one group belonging together spatially and that supply electric measuring signals that are supplied separately to a central evaluation station. The distinction of this process and this device according to the invention is that the measuring signals from each of the measuring points forming one group are supplied in each case via an associated signal transmission device, preferably one (if necessary two-wire) line first to a network device assigned to the respective group, which holds the measuring signals receive from its measuring points for successive switching to its input and that for each network device the measuring signals are switched through control signals led via its input in a predetermined sequence to its input which is connected directly or indirectly with an input of the central evaluation station.

Abstract: The invention provides a contact temperature sensor consisting of a planar contact plate, a thermocouple element attached to the contact plate for determining the temperature of the contact plate, and a deflectable and tiltable holding system. The connection lines to the thermocouple element are wound around a tube. By vulcanisation with a rubber-elastic material, a one-piece elastic formed body is produced which connects together the contact plate, holding piece and inner tube. Through the rubber-elastic spring action and the deflectability and tiltability of the contact plate with reference to the surface of the object of measurement, and improved flow of heat to the contact plate and improved measurement results are achieved.

Abstract: A method is proposed for checking the alignment of body axes for parallelism, which method can be carried out in simple manner with low effort in auxiliary apparatus means and yet delivers highly accurate measurement results. In the method, a measurement beam L, preferably a laser beam, is emitted transversely to the body axis of each body 1 and 2 and on rotation about the body axis impinges on at least three detectors 4a, 4b, 4c, 4d and 4e in succession, which respectively deliver a signal denoting the position of the point of incidence along a detector axis 5 of the respective detector. From the detector signals and the relative position, which optionally is separately determined, of points of intersection of the body axes and the detector axes with a surface spanned by a measurement beam, the relative spatial position for each body axis with respect to a reference axis is computed. Also proposed is a particularly suitable device for carrying out the method.

Abstract: A device for the measurement of acceleration by piezo-electric transducers. The device comprises a carrier 14 and 16 with a principal axis parallel to the direction of acceleration measurement, a seismic mass 20 and 22 retained to be movable relative to the carrier and piezo-electric elements 12 and 12' coupled therewith for excitation and co-operating in pairs, wherein the arrangement is such that pyro-electric effects compensate for each other. According to the invention, the carrier has a transverse member 16 which extends transversely to the principal axis and the piezo-electric elements acted on by compression excitation are installed on sides thereof, which are opposite with respect to the direction of the principal axis, between this and the seismic mass 20 and 22. There is thus achieved, apart from the temperature independence, a large insensitivity to base expansion as well as to any accelerations of kind and direction other than linear and parallel to the principal axis.

Abstract: A plumb device includes a direction determination unit suspended on an upper, movable, convexed portion of a universal joint. A lower, fixed, concaved portion of the movable joint is rigidly connected to a stand by means of a housing. The lower joint part has a lubricant supply line through which a lubricant can be introduced to a groove located on the upper joint part and positioned so as to be between the upper and lower joint parts.

Abstract: The invention provides a device for monitoring pumps to detect danger of damage by cavitation. One object of the invention is to provide a device for this purpose which is simple in design, is readily handled, simple to attach to the pump to be monitored and permanently and straightforwardly indicates if there is cavitation and if so to what degree.

Abstract: An apparatus for detecting and monitoring changes in the position of rotating shafts in which a light ray generally parallel to the shafts is directed to measurement positions (which are offset from each other by about 90.degree. in the circumferential direction of the shafts) to a rectangular prism, which reflects the ray to a ray receiver, which supplies signals, which change with any change in the position of the shafts. In known apparatus for making possible a continuous monitoring of the alignment condition of coaxial shafts, the ray source and the ray receiver are arranged on one shaft and a prism is arranged on the other. The signals of the ray receiver and the power supply thereof require the use of complex and unreliable transmission means between the rotating and stationary parts of the apparatus. According to the invention light rays (S and S'), come from two separate source-receiver pairs (2.sub.1,9.sub.1, and 2.sub.2 and 9.sub.

Abstract: An apparatus is proposed for detecting changes in the mutual position of two mutually spaced and separately mounted machines or parts thereof in relation to a given initial position in a rectangular spatial coordinate system. A high degree of functional capability and accuracy of measuring which at the same time ensuring a simple structure and high reliability is made possible. Furthermore, errors in alignment in the form of parallel and angular offset may be immediately seen. This is made possible by the use of a respective reflecting rectangular prism and a respective light transmitter for each of the three axial directions of the coordinate system, in which a mutual parallel offset and angular offset is to be detected. The reflecting and the light transmitters are mutually rigidly fitted on the machines or parts thereof.

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).