Abstract: The invention relates to a switch acting in contactless fashion for the purpose of detecting the position of a first part with respect to a second part, having a transceiver for attachment to one of the parts, which transceiver is supplied with power by an electrical supply source and comprises a coil, which is connected to a transmission/reception circuit, for the purpose of transmitting an interrogation signal and for the purpose of receiving a response signal, which can be transmitted in response to the interrogation signal by a transponder which can be arranged on the other part, wherein in addition to a first path for processing the response signal to an evaluation circuit, a second path is provided which has a proximity circuit, which is connected on the input side to a connection of the coil and on the output side to the evaluation circuit for the amplitude of the voltage tapped off by the coil for the purpose of determining the distance between the parts.

Abstract: The invention relates to an access protection device for a physical area which can be switched on and off in a controlled manner, comprising a fixed part, at least one movable part for closing an access opening in the fixed part and, for each movable part, a tumbler device having a magnetic circuit, which comprises a magnetizable yoke located on the movable part and an electromagnet which can be closed by means of the yoke, it being possible to regulate the locking force of said electromagnet by means of a current regulator, a first and a second desired value being predetermined for the current regulator, and it being possible to periodically carry out a controlled jump from the first to the second desired value, it being possible to measure the time from the beginning of the controlled jump to the time at which the second desired value is reached.

Abstract: The invention relates to a position monitoring device for establishing the position of a first part with respect to a second part, having a transceiver at the first part for emitting an interrogation signal and for receiving a response signal that can be emitted in reaction to the interrogation signal by a transponder, wherein a screen that attenuates signals between the transponder and the transceiver is provided, two members of the group consisting of the transceiver, the screen and the transponder being movable relative to one another.

Abstract: A safety monitoring device is provided for a lift car which can be moved in a lift shaft by a traction drive via a lift control system and whose instantaneous position can be registered by a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor in each case for location-dependent, instantaneous determination of the speed of the lift car and for comparison with a predefined movement profile, it being possible for a trigger signal that can be output via a safety relay stage to be generated if a predetermined instantaneous speed desired value is exceeded.

Abstract: A magnetic safety closure for a protection device that is movable with respect to a fixed part includes a housing that is attachable to the protection device and includes a handle for opening and closing the protection device. The housing includes a sensor housing that is attachable to the fixed part and provided with a sensor for determining whether the protection device is closed or open. The housing attachable to the protection device has an initiating device for the sensor and is opposite the sensor when the protection device is closed. The housing and the sensor housing share a magnet arrangement having at least one holding magnet and an associated pole plate. The handle is a two armed lever pivotably mounted on the housing, with arm of the lever facing the sensor housing with its free end disconnecting the holding magnet from its associated pole plate when the handle is pivoted out in order to open the protection device.

Abstract: The invention relates to a magnetic safety closure for a protection device moveable with respect to a fixed part, comprising: a housing attachable to the protection device and provided with a handle for opening and closing the protection device; the housing further comprising a sensor housing attachable to the fixed part and provided with a sensor for determining whether the protection device is closed or open; the housing attachable to the protection device having an initiating device for the sensor, which device is opposite said sensor when the protection device is closed; and the housing and the sensor housing sharing between them a magnet arrangement having at least one holding magnet and an associated pole plate; wherein the handle is a two-armed lever pivotably mounted on the housing, one arm of the lever facing the sensor housing and with its free end disconnecting the at least one holding magnet of the magnet arrangement from its associated pole plate when the handle is pivoted out in order to open th

Abstract: The invention relates to a switch acting in contactless fashion for the purpose of detecting the position of a first part with respect to a second part, having a transceiver for attachment to one of the parts, which transceiver is supplied with power by an electrical supply source and comprises a coil, which is connected to a transmission/reception circuit, for the purpose of transmitting an interrogation signal and for the purpose of receiving a response signal, which can be transmitted in response to the interrogation signal by a transponder which can be arranged on the other part, wherein in addition to a first path for processing the response signal to an evaluation circuit, a second path is provided which has a proximity circuit, which is connected on the input side to a connection of the coil and on the output side to the evaluation circuit for the amplitude of the voltage tapped off by the coil for the purpose of determining the distance between the parts.

Abstract: The invention relates to a position monitoring device for establishing the position of a first part with respect to a second part, having a transceiver at the first part for emitting an interrogation signal and for receiving a response signal that can be emitted in reaction to the interrogation signal by a transponder, wherein a screen that attenuates signals between the transponder and the transceiver is provided, two members of the group consisting of the transceiver, the screen and the transponder being movable relative to one another.

Abstract: The invention relates to a safety monitoring device for a lift car which can be moved in a lift shaft by means of a traction drive via a lift control system and whose instantaneous position can be registered by means of a position registering device which supplies two position signals, produced independently of each other, in a predetermined time pattern, having two-channel evaluation of the position signals by means of a microprocessor in each case for location-dependent, instantaneous determination of the speed of the lift car and for comparison with a predefined movement profile, it being possible for a trigger signal that can be output via a safety relay stage to be generated if a predetermined instantaneous speed desired value is exceeded.

Abstract: The invention relates to a magnetic safety closure for a protection device moveable with respect to a fixed part, comprising: a housing attachable to the protection device and provided with a handle for opening and closing the protection device; the housing further comprising a sensor housing attachable to the fixed part and provided with a sensor for determining whether the protection device is closed or open; the housing attachable to the protection device having an initiating device for the sensor, which device is opposite said sensor when the protection device is closed; and the housing and the sensor housing sharing between them a magnet arrangement having at least one holding magnet and an associated pole plate; wherein the handle is a two-armed lever pivotably mounted on the housing, one arm of the lever facing the sensor housing and with its free end disconnecting the at least one holding magnet of the magnet arrangement from its associated pole plate when the handle is pivoted out in order to open th

Abstract: The invention relates to an access protection device for a physical area which can be switched on and off in a controlled manner, comprising a fixed part, at least one movable part for closing an access opening in the fixed part and, for each movable part, a tumbler device having a magnetic circuit, which comprises a magnetizable yoke located on the movable part and an electromagnet which can be closed by means of the yoke, it being possible to regulate the locking force of said electromagnet by means of a current regulator, a first and a second desired value being predetermined for the current regulator, and it being possible to periodically carry out a controlled jump from the first to the second desired value, it being possible to measure the time from the beginning of the controlled jump to the time at which the second desired value is reached.