Abstract: A production method for producing cast parts from metal using a sand casting mold (1). The sand casting mold (1) is produced in this case in a molding box (2) by means of a negative-pressure molding method. According to the invention, the sand casting mold (1), which is under negative pressure, in the molding box (2) is first of all filled with molten metal (5). The molding box (2) with the sand casting mold (1), which is under negative pressure therein, is then completely or partially impinged upon by a cooling fluid (4) and after, at the same time as, or before the cooling fluid impingement is opened at places with cooling fluid impingement. As a result of this, cooling fluid (4) is sucked into the sand casting mold (1) which is under negative pressure, as a result of which the solidifying cast part (3) is quenched more quickly.

Abstract: A production method for producing cast parts from metal using a sand casting mould (1). The sand casting mould (1) is produced in this case in a moulding box (2) by means of a negative-pressure moulding method. According to the invention, the sand casting mould (1), which is under negative pressure, in the moulding box (2) is first of all filled with molten metal (5). The moulding box (2) with the sand casting mould (1), which is under negative pressure therein, is then completely or partially impinged upon by a cooling fluid (4) and after, at the same time as, or before the cooling fluid impingement is opened at places with cooling fluid impingement. As a result of this, cooling fluid (4) is sucked into the sand casting mould (1) which is under negative pressure, as a result of which the solidifying cast part (3) is quenched more quickly.

Abstract: An electronic safety system for an elevator with a controller, which is coupled to a motor for driving an elevator car, a safety controller and a bus by means of which the controller can communicate with bus nodes which receive data from at least one sensor. The controller can communicate with a safety circuit which can be put into an open state by the safety controller, as a result of which the motor is shut off, and the safety circuit has a means which notifies the controller of shut-off of the motor, or shut-off of the motor can be detected by the controller on the basis of the data transmitted from the bus nodes to the controller.

Abstract: Electronic safety system for an elevator with a controller (1) which is coupled to a motor (21) for driving an elevator car (2), comprising a safety controller (10) and a bus (3) by means of which the controller (1) can communicate with bus nodes which receive data from at least one sensor (4, 5, 5?, 6, 7, 9), wherein the controller (1) can communicate with a safety circuit (11) which can be put into an open state by the safety controller (10), as a result of which the motor (21) is shut off, and the safety circuit (11) has a means which notifies the controller (1) of shut-off of the motor (21), or shut-off of the motor (21) can be detected by the controller (1) on the basis of the data transmitted from the bus nodes to the controller (1).

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 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.