Abstract: A mounting device may include a top plate including a cone-shaped center portion, a flange coupled to the cone-shaped center portion, a number of apertures defined in the flange, and a number of fasteners engaged with the apertures to couple the top plate to a surface of a structure. The flange seals a bottom side of the top plate to the surface of the structure. The flange includes a seal coupled to the bottom of the flange. The cone-shaped center portion has a convex paraboloid shape. The flange includes at least one surface that is parallel to a surface of the structure, and a transition between the cone-shaped center portion and the flange forms an angle. The top plate has a diameter sufficient to displace a load greater than 50 pounds over the surface of the structure.

Abstract: The switching valve of a quick-operating slider system is an electrically operated stop valve. In the case of a required rapid shutoff, the coil (19) must be de-energized in a very short period of time in order to allow the switching valve (18) to open. For this purpose, a voltage-dependent resistor (33) is provided between the voltage source (25) and the coil (19), said resistor (33) having a high resistance below a switching voltage (Us), but a negligibly small resistance above the switching voltage. An auxiliary voltage source (35) is connected in parallel to the coil (19), the voltage of said auxiliary voltage source (35) being opposite to that of the voltage source (25). In this manner, the switching valve is rapidly opened both when a corresponding signal is received and in the case of power failure.

Abstract: A trigger circuit comprises a first series circuit (16) defined by an electronic switch (17) and an electromagnetic actuator (10). A second series circuit (18) defined by a resistor (19) and a sensor (20) responding to danger situations is arranged in parallel to said first series circuit (16). A tap (24) of said second series circuit (18) is connected with a control electrode (25) of said electronic switch (17). The circuit is of simple configuration and ensures a reliable switching behavior. Even when said sensor (20) is closed again, the trigger state is maintained.

Abstract: A trigger circuit comprises a first series circuit (16) defined by an electronic switch (17) and an electromagnetic actuator (10). A second series circuit (18) defined by a resistor (19) and a sensor (20) responding to danger situations is arranged in parallel to said first series circuit (16). A tap (24) of said second series circuit (18) is connected with a control electrode (25) of said electronic switch (17). The circuit is of simple configuration and ensures a reliable switching behavior. Even when said sensor (20) is closed again, the trigger state is maintained.

Abstract: The switching valve of a quick-operating slider system is an electrically operated stop valve. In the case of a required rapid shutoff, the coil (19) must be de-energized in a very short period of time in order to allow the switching valve (18) to open. For this purpose, a voltage-dependent resistor (33) is provided between the voltage source (25) and the coil (19), said resistor (33) having a high resistance below a switching voltage (Us), but a negligibly small resistance above the switching voltage. An auxiliary voltage source (35) is connected in parallel to the coil (19), the voltage of said auxiliary voltage source (35) being opposite to that of the voltage source (25). In this manner, the switching valve is rapidly opened both when a corresponding signal is received and in the case of power failure.

Abstract: The actuation circuit for an actuator (10) includes an energy store (11) arranged near the actuator (10). The energy store (11) is configured such that it instantaneously discharges in response to a trigger signal, wherein the discharge current or voltage is limited to that amount which is required to operate the actuator (10). This ensures rapid response of the actuator (10) without an overshoot of the discharge energy occurring.

Abstract: A shutoff device for shutting off liquids or gases comprises a device housing (10) and a device (13) movable in said housing (10), the device (13) being provided with an opening (14). For sealing purposes, annular sealing bodies (28) are provided which are supported in annular fluid cylinders (27). The contact surfaces (34) are coated with a hard-material layer (37,39) which is subjected to microfinishing. The sealing bodies (28) are yieldingly supported such that they are capable of following any deformation or displacement of the device (13). The sealing is particularly suitable for aggressive and abrasive media and solids-carrying media.

Abstract: A shutoff device for shutting off liquids or gases comprises a device housing (10) and a device (13) movable in said housing (10), the device (13) being provided with an opening (14). For sealing purposes, annular sealing bodies (28) are provided which are supported in annular fluid cylinders (27). The contact surfaces (34) are coated with a hard-material layer (37,39) which is subjected to microfinishing. The sealing bodies (28) are yieldingly supported such that they are capable of following any deformation or displacement of the device (13). The sealing is particularly suitable for aggressive and abrasive media and solids-carrying media.

Abstract: The actuation circuit for an actuator (10) includes an energy store (11) arranged near the actuator (10). The energy store (11) is configured such that it instantaneously discharges in response to a trigger signal, wherein the discharge current or voltage is limited to that amount which is required to operate the actuator (10). This ensures rapid response of the actuator (10) without an overshoot of the discharge energy occurring.