Abstract: The present invention relates to a system and method for securing wiring to a device housing. The device housing is provided with a base capable of securing different types of wiring. A reversible clamp strap is provided that may be used to further provide for the securing of different types of conductors into the device housing.

Abstract: A passive infrared detector has a first sensor (1) for generating an infrared signal, representative of the difference in temperature between a heat source and the background environment of the detector, a second sensor (3), influenced by the ambient temperature in the detector, and an evaluation circuit (2) for processing the infrared signal. The evaluation circuit contains a temperature compensation (4) for influencing the sensitivity of the detector as a function of the ambient temperature. The temperature compensation (4) is designed in such a way that the sensitivity of the detector is not directly influenced by changes in the ambient temperature. Influencing of the sensitivity of the detector takes place with delay and/or as a function of the speed of the change in the ambient temperature.

Abstract: A fire alarm having an electronic evaluator, an optical module, a temperature sensor, and at least one combustion gas sensor, where the electronic evaluator diagnoses one of a plurality of fire types and selects an application-specific algorithm based on the diagnosed fire type. The electronic evaluator uses the signals from the sensors to diagnose at least one of a plurality of types of fire. The fire alarm may have at least one polarization filter which may be an active polarizer with electrically adjustable polarization plane.

Abstract: A fire detection system comprising a control panel comprised of one or more controllers for controlling a plurality of devices. A pair of lines are operably connected to the control panel and the devices for communicating signals between said control panel and said devices. A circuit for providing a polarity sensing power and signal interface is provided between the control panel and devices to reduce to reduce system maintenance. The circuit includes a rectifier circuit operably connected the pair of lines wherein the rectifier circuit is comprised of at least two transistors for providing the circuit with a low-impedance path to ground and providing the circuit with a polarity insensitive output. Capacitors may be operably connected to the transistors in the rectifier circuit to keep the transistors turned on when a low voltage is applied to the rectifier circuit.

Abstract: An apparatus for detecting the temperature of a room (2) includes means (4) for generating and receiving sound waves, means (5) for determining the transit time of the sound waves for a certain distance (x) in the room (2) and means (10) for calculating the temperature (U) of the room (2) by means of the ascertained transit time (t) of the sound waves for the distance (x) in the room (2). An approximation procedure for ascertaining the distance (x) is automatically executed. The temperature (U) ascertained in that way corresponds to a mean room temperature over the distance (x).

Abstract: A security system utilizes danger sensors (3) and a central unit connected wirelessly to the danger sensors (3). The danger sensors (3) have a communication module (8) which has the same dimensions and same shape for all sensor types, and which is intended to attach the danger sensor (3) to a mounting plate (2). In addition to the communication module (8), the danger sensor (3) contains a detection module (9) where the communication module (8) has a mechanical and electrical/electronic interface with the detection module (9).

Abstract: A bus subscriber node (2) having a feed module (10) and means (9) for transmitting and/or receiving information by way of the bus (1) has a switch module (11) which is actuatable by way of a switching logical member (12) and by which the feed module (10) can be connected to the bus (1) or by which the feed module (10) can be separated from the bus (1). The bus subscriber node (2) also has a memory cell (14) and a monitoring member (13) for detecting a current supplied by the feed module (10). The switching logical member (12) is coupled to the memory cell (14) and the monitoring member (13) in such a way that the feed module (10) can be separated from the bus (1) on the basis of an item of information stored in the memory cell (14) or on the basis of a certain current level detected by the monitoring member (13). With the memory cell (14) the bus subscriber node (2) can be configured as a feeding or as a non-feeding bus subscriber node and can be used in communication networks with central and decentral feed.

Abstract: An operating mechanism for operating an actuating member is provided with an electric motor, a resetting spring and a centrifugal brake, wherein the actuating member can be operated in a first direction of movement by the electric motor activated by means of a control or regulating device, and in a second direction of movement by means of the resetting spring. In accordance with the invention, a brake body of the centrifugal brake is arranged on the rotor of the electric motor. The centrifugal brake arranged directly on the rotor can be configured such that a braking effect is generated only when the actuating member is operated by the resetting spring. When operated by the electric motor being switched on, on the other hand, the centrifugal brake has no braking effect. By means of the centrifugal brake, the speeds that can be reached are limited to the extent that no spurious vibrations and noises occur.

Abstract: A flame measuring device, in particular for use in a regulating device for a burner, includes an ionization electrode which is arranged in a flame region of the burner. An ac voltage is applied to the ionization electrode whereby a dc voltage component is superimposed on an ionization current that flows through a resistor connected to the ionization electrode. The flame region influences the ac voltage and the dc voltage at a blocking capacitor unequally, and allows an ac voltage component to be separated from the dc voltage component by way of a first means. The separated ac voltage component can be compared to a separated-off dc voltage component by way of a second means in order to produce a pulse width-modulated signal.

Abstract: A manual call point having a housing base (1), a cover and an alarm insert with a fragile panel (4), a printed-circuit board (3), a switching element (6) and an actuating mechanism. The actuating mechanism for the switching element (6) is formed by a pivoting lever (7) resting on a lateral edge of the panel (4), the pivoting lever (7) pressing on the switching element (6) in the normal state of the manual call point and holding the switching element (6) in a closed position. When the panel (4) is smashed the pivoting lever (7) pivots, so the switching element (6) is opened. The switching element (6) is arranged on the printed-circuit board (3) and comprises a flexible end switch. The manual call point also contains a device for triggering a test alarm comprising a switching lever (9) to displace the panel (4) until the pivoting lever (7) is released and comprises a member (10) to actuate the switching lever (9).

Abstract: A safety device (1) for a fluid transmission has a diaphragm (4) which is arranged deflectably in a feed passage (8) and which has at least one through opening (2) for the fluid. A return passage (10) for the fluid from the chamber of the consumer (9) is of such a configuration and arrangement that it can be opened and closed by deflection of the diaphragm (4), wherein the diaphragm (4) is of such a configuration that, when the fluid flow in the feed passage (8) falls below a given value, the return passage (10) is opened. The pressure in a pressure chamber (9) of a consumer can be let off by the device (1) when a pump (7) is no longer conveying.

Abstract: A device driver for a network device controller for selectively controlling an end device in a control network includes a first selector for selecting a plurality of first output signals from a plurality of first input signals, a second selector for selecting at least one second output signal from the first output signals, and a third selector for selecting an operating mode of the end device from a plurality of predefined operating modes based on the second output signal.

Abstract: A device driver for a network device controller for selectively controlling an end device in a control network includes a first selector for selecting a plurality of first output signals from a plurality of first input signals, a second selector for selecting at least one second output signal from the first output signals, and a third selector for selecting an operating mode of the end device from a plurality of predefined operating modes based on the second output signal.

Abstract: An actuating drive (1) has a housing (4) which also affords protection from splashed water and which comprises two housing portions (5; 6), wherein the two housing portions (5; 6) each have an edge (20; 40) with a respective end face (21; 41) which are disposed in opposite relationship when the housing portions are assembled. When the two housing portions (5; 6) are assembled zones which act in different ways are formed between the two end faces (21; 41). A first zone (Z1) in which the two housing portions (5; 6) are in contact with each other is provided on the housing (4) towards the exterior. A second zone (Z2) having a passage (55) is provided beside the first zone (Z1), towards the interior. The passage (55) of the second zone (Z2) is closed towards an internal space (33) of the housing by a third zone (Z3) in which the two housing portions (5; 6) are not in contact with each other.

Abstract: The passive infrared detector contains a heat-sensitive sensor and a focusing device for focusing thermal rays incident on the detector from the room under surveillance onto the sensor. The focusing device has focusing elements for surveillance regions having different positions in the room under surveillance. Each focusing element comprises a number of sub-elements, with the result that the surveillance regions are split up vertically into subzones having slightly different elevation. In a majority of the surveillance regions, the subzones overlap at most only slightly. Human being and animals are distinguished by the amplitude of the sensor signal which is proportional to the number of subzones interrupted by the object in the room under surveillance. The number of sub-elements and correspondingly the number of subzones increases with decreasing radial distance of the respective surveillance region from the detector.

Abstract: A regulating device for a burner regulates the air-gas ratio by way of an ionization electrode. In the event of dynamic changes in output preliminary control is implemented in accordance with the invention with two or more stored characteristics.

Abstract: During start-up a regulating device monitors the quality of the air ratio control in respect of time in accordance with the invention in that it observes the difference of a signal and comparison signal.

Abstract: The method according to the invention of monitoring a flame uses the known principle that a direct current signal (IF) of different magnitude is produced in dependence on the presence or intensity of the flame from an ac voltage signal. That purpose is served for example by ionization electrodes (3) or ultraviolet sensors (4, 4a) which in dependence on the intensity of the flame produce a corresponding direct current signal. When the flame is extinguished no direct current signal is produced. The direct current signal (IF) is detected by an evaluation circuit (6) and converted into a first output signal (A), wherein conversion is effected by various further circuit elements (7, 9, 10) in such a way that differently changing output signals (A1, A2) are obtained depending on the respective flame intensity.

Abstract: A circuit (1) for monitoring the state—open or closed—of an ac switch (2) has an input (4) which is connected by way of a diode (9) and a first resistor (10) to a high-ohmic input (11) of a first digital component (12). One terminal of the ac switch (2) is connected to the phase (P) of a mains voltage (UPN), while the other terminal is connected to the input (4) of the circuit (1). The high-ohmic input (11) of the first digital component (12) is connected by way of a second resistor (13) to an output (14) of a second digital component (15). In accordance with a predetermined time lapse, the output (14) of the second digital component (15) is either connected to the neutral point (N) of the mains voltage (UPN) or carries a voltage which is greater than the threshold voltage (US) of the input (11) of the first digital component (12).