Abstract: A device for the electric contacting of a sensor present on the outer side of the window of a motor vehicle, which sensor has an electric conductive track which is connected to an electric connecting contact within the motor vehicles. In order to produce a device for the corrosion-free, water-tight electric contacting of a moisture sensor present on the outer side of the motor vehicle, a conductive track arranged on a flexible support is arranged on the vehicle window, gripping around its edge region, the conductive track being conductively connected to the sensor conductive track in the region outside the vehicle and to a connecting contact in the region inside the vehicle.

Abstract: A measuring device with an integrated light beam scanning means for detecting the number of revolutions of a rotating body, contrast-coded data (bar codes) being capable of detection by means of the light beam scanning means. The measuring device includes a selecting means to select the mode of operation consisting of measuring the number of revolutions or detecting data. An analyzing means analyzes signals outputted by the scanning means (1) and automatically selects one of the modes of operation consisting of measuring the number of revolutions and detecting data in dependence on the result of the analysis.

Abstract: A system for controlling actuating members in the doors of motor vehicles has at least one electromotive actuating drive and at least one actuating element (switch, button) in the door of the motor vehicle, as well as a control unit located in the vehicle itself. The system employs only a two-wire connection between control unit and actuating drive. The control unit, in addition to an ordinary pole-reversing and evaluation circuit, furthermore contains a source of alternating voltage as well as means for connecting the alternating voltage and a decoder. At least two passive components (resistor, capacitor, coil) of different size are provided to be connected by the actuating element in parallel with the actuating drive into the two-wire connection.

Abstract: According to a remote control method, sound waves are output by a transmitter as short and long remote control pulses. These pulses are evaluated according to their duration. In order to largely avoid disturbances in the evaluation due to superimposition with reflected remote control signals, defined parameters, particularly at least one evaluation time of the remote control method, are adapted to variations in the duration of the remote control pulses output by the transmitter which are possible due to superimposition. Furthermore, a blanking is proposed which has a variable blanking duration that automatically adapts to a pause duration between two remote control pulses, which is varied due to a reflection.

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: 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: 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: A hearing aid with wireless remote control of at least one of its controllable functions. The microphone of the hearing aird is used as a receiving element for the control signals. Energy (such as ultrasound) which the hearing aid microphone can transform into electrical signals which are separated from the other signals in a remote control part and caused to act upon the control members is used as a control signal transmission medium. Equipping a hearing aid with a remote control according to the invention is suited in particular for miniature hearing aids and for hearing aids insertable into the ear canal.

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: An electro-acoustical transmitter converts electrical signals which correspond to acoustical events into mechanical vibrations which are transmitted onto the skin. The aim is to achieve a small vibrator which, insofar as possible, can be worn on the wrist, for instance, in the manner of a wristwatch. To that end, a coil is employed into which a magnetic core, resiliently mounted relative thereto for instance by a diaphragm, projects as an armature. The housing which carries both the diaphragm and the coil forms the magnetic return flux path. Thus, a miniaturization of the vibrator on the desired order is achieved. An inventive vibrator is particularly suited for the deaf.

Abstract: A thread draw-off nozzle for an open-end rotor spinning machine includes a nozzle body, and an exchangeable thread inlet funnel connected to the nozzle body.

Abstract: A thermoelectric level detector employs an impedance element, at least a portion of which is meandering in configuration in which the resistive path repeatedly traverses the axis thereof, to detect the level of liquid in a tank. The impedance of the element depends on temperature and provides a measure of the liquid level. The pitch of the meander is relatively small in the reserve region of the tank to provide fine resolution in this region.

Abstract: Spinning rotor for an open-end spinning machine including a rotational body having a hollow interior, the body being formed of steel and having thereon a surface layer formed of at least one of the compounds iron carbide, iron boride, iron silicide and iron nitride at least at locations of the hollow interior thereof at which the spinning rotor comes into contact with spinning fibers being spun into a thread, the steel body with the surface layer thereon being tempered and having increased ductility at high elastic limits, and a method of manufacturing a spinning rotor.

Abstract: An electronic clock, particularly a quartz clock, with a timer signal transmitting stage, an indicator system which at least contains a minute counter and an hour counter, as well as a decoding stage and a digital indicator board, and an alarm system which at least contains a presettable counter associated with the minutes and a presettable counter associated with the hours, the outputs of which presettable counters are able to be locked on the indicator system, and a coincidence stage for comparison of the output signals of the counters of the indicator system with those of the alarm system. Each counter of the alarm system constitutes a forward-rearward-counter, and switches are provided for selection of the counting direction.

Abstract: The invention relates to a wind direction indicator for sailboats wherein a rotatably mounted permanent magnet connected to the shaft of a weather vane is employed as a pick-up. By means of its magnetic field, it controls, in dependency upon the wind direction with great respect to the midship line two magnetically controllable semiconductors mutually displaced by an angle of 90.degree.. This is an improvement over U.S. Pat. No. 3,791,211.

Abstract: An electronic clock, such as a quartz-crystal clock, is tested and may be adjusted by measuring the oscillation frequency of the clock with an active antenna. The oscillation frequency is electrically compared with a reference frequency to determine deviation and provide an output indication. Internal calibration is carried out when the system is not being used for testing.

Abstract: The invention relates to an electric clock with an oscillator, especially a quartz oscillator, a frequency divider connected thereto, and a control stage connected to the output of the frequency divider either directly or via a pulse shaper stage. Through the control stage, a stepper motor, preferably a single-phase stepper motor, connected to the hand mechanism is acted upon by square-wave pulses of identical or alternating polarity.