Status-reporting device for reporting a predetermined temperature state, temperature sensor suitable for such a status-reporting device, and process for the production of such a temperature sensor
First Claim
1. Status-reporting device for reporting a predetermined temperature state comprising a plurality of temperature sensors (Rs1 -Rs7) producing output signals according to a temperature state monitored by the sensors, and an evaluating device connected to the sensors and having means for generating and transmitting an alarm signal when a preselected value the output signals is reached, said evaluating device comprising an interrogating device (IC3) having an output (3) and a plurality of inputs (1, 2, 5, 12-15) for said sensors (Rs1 -Rs7), means (IC2) for connecting the sensors and the inputs (1, 2, 5, 12-15) of the interrogating device (IC3) with the output (3) of the interrogating device (IC3) periodically and one after the other, said means (IC2) being coupled with said interrogating device, and a threshold switch (IC51) having an output (7) being connected to said means for generating and transmitting said alarm signal and connected with the output (3) of said interrogating device, wherein each of said temperature sensors (Rs1 -Rs7) is a bead-heat conductor (1) provided with a tip (3) carrying a semiconductor bead (4) and arranged in a housing (6), said housing (6) having a hollow end portion (8) and a protective cap (12) connected to said hollow end portion (8) so that said tip 3 is arranged within said protective cap (12), said protective car (12) is provided with at least one opening for maintaining a flow of air around said tip (3) and said bead-heat conductor (1) in said housing (6) is embedded in a casting compound (11) in such a way that only said tip (3) projects out of said casting compound (11).
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Accused Products
Abstract
The invention is directed to a status-reporting device with a plurality of sensors which send output signals whose values depend on the status monitored by the sensors and with an evaluating device which is connected to the sensors and responds by sending an alarm signal when a preselected value of the output signals is reached. According to the invention, the evaluating device has an individual threshold switch (IC51) which generates the alarm signal and is connected with the output (3) of an interrogating device (IC3) which has a plurality of inputs (1, 2, 5, 12-15) connected to each sensor, respectively, and means (IC2) which connect the inputs (1, 2, 5, 12-15) with the output (3) periodically and one after the other. Also described is a temperature sensor which is particularly suitable for fire detection and fire extinguishing systems, as well as a process for the production thereof (FIG. 4).
34 Citations
24 Claims
- 1. Status-reporting device for reporting a predetermined temperature state comprising a plurality of temperature sensors (Rs1 -Rs7) producing output signals according to a temperature state monitored by the sensors, and an evaluating device connected to the sensors and having means for generating and transmitting an alarm signal when a preselected value the output signals is reached, said evaluating device comprising an interrogating device (IC3) having an output (3) and a plurality of inputs (1, 2, 5, 12-15) for said sensors (Rs1 -Rs7), means (IC2) for connecting the sensors and the inputs (1, 2, 5, 12-15) of the interrogating device (IC3) with the output (3) of the interrogating device (IC3) periodically and one after the other, said means (IC2) being coupled with said interrogating device, and a threshold switch (IC51) having an output (7) being connected to said means for generating and transmitting said alarm signal and connected with the output (3) of said interrogating device, wherein each of said temperature sensors (Rs1 -Rs7) is a bead-heat conductor (1) provided with a tip (3) carrying a semiconductor bead (4) and arranged in a housing (6), said housing (6) having a hollow end portion (8) and a protective cap (12) connected to said hollow end portion (8) so that said tip 3 is arranged within said protective cap (12), said protective car (12) is provided with at least one opening for maintaining a flow of air around said tip (3) and said bead-heat conductor (1) in said housing (6) is embedded in a casting compound (11) in such a way that only said tip (3) projects out of said casting compound (11).
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11. Status-reporting device for reporting a predetermined temperature state comprising a plurality of temperature sensors (Rs1 -Rs7) producing output signals whose values depend on a temperature status monitored by the sensors, and an evaluating device connected to the sensors and including means for transmitting an alarm signal when a preselected value of the output signals is reached, a threshold switch (IC51) for producing the alarm signal and having an output (7);
- an interrogation device having an output (3) and a plurality of inputs (1, 2, 5, 12-15) for said sensors (Rs1 -Rs7), the output (3) of the interrogation device being connected to the threshold switch (IC51); and
means (IC2) for connecting the sensors and the inputs (1, 2, 5, 12-15) of the interrogation device (IC3) with the output (3) of the interrogation device (IC3) periodically and one after the other, wherein each of the temperature sensors (Rs1 -Rs7) have a housing (6) and a bead-heat conductor provided with a tip (3) carrying a semiconductor bead (4) in the housing (6) and embedded in a casting compound (11) in such a way that said tip (3) carrying the semiconductor bead (4) projects out of the casting compound, the housing (6) includes a hollow end portion (8) and a protective cap (12) connected with the hollow end portion (8), said protective cap being provided with at least one opening for maintaining a flow of air around the tip (3), and the casting compound (11) also partially fills the protective cap (12); and
monoflop means (IC6) for temporarily storing the alarm signal having an output and connected with the output (7) of the threshold switch (IC51). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
- an interrogation device having an output (3) and a plurality of inputs (1, 2, 5, 12-15) for said sensors (Rs1 -Rs7), the output (3) of the interrogation device being connected to the threshold switch (IC51); and
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20. Status-reporting device for reporting a predetermined temperature state, said status-reporting device comprising a plurality of temperature sensing means (Rs1 -Rs7) for generating output signals whose values are characteristic of temperatures monitored by the sensing means, and evaluating means for receiving said output signals and for sending an alarm signal in response to said output signals when a preselected value of at least one of the output signals is reached, said evaluating means including a threshold switch (IC51) for generating the alarm signal;
- an interrogation device (IC3) having a plurality of inputs (1, 2, 5, 12-15) connected to respective ones of said sensing means (Rs1 -Rs7) and an output (3) connected to said threshold switch (IC51) and means (IC2) for connecting the sensors and the inputs (1, 2, 5, 12-15) of the interrogation device (IC3) with the output (3) of the interrogation device (IC3) periodically and one after the other; and
testing means for checking for a proper functioning of the evaluating means and for responding to an improper functioning of the evaluating means and means for sending an additional alarm signal when the improper functioning is detected, said testing means being connected in parallel with the evaluating device and including an additional threshold switch (IC52) for generating the additional alarm signal, an additional interrogating device (IC4) having a plurality of inputs (1, 2, 4, 5, 12, 13,
15) connected to respective ones of said sensing means (Rs1 -Rs7) and an output connected to the additional threshold switch (IC52) and means (IC2 ) for connecting the sensors and the inputs (1, 2, 4, 5, 12, 13,
15) of the additional interrogating device (IC4) with the output (3) of the additional interrogating device (IC4) periodically and one after the other, wherein the interrogating devices (IC3, IC4), the threshold switches (IC51, IC52), and the means (IC2) are combined to form a standardized plug-in card (IC8) having input connections including connections for heat conductors, adjusting members, display devices and operating voltages, and means for selecting and adjusting said heat conductors individually, and having at least one output (2) for transmitting the alarm signals generated by the evaluating means and wherein each of the temperature sensing means (Rs1 -Rs7) includes a housing (6) and a bead-heat conductor comprising a tip (3) carrying a semiconductor bead (4) in the housing (6) embedded in a casting compound (11) in such a way that said tip (3) carrying the semiconductor bead (4) projects out of the casting compound, the housing (6) includes a hollow end portion (8) and a protective cap (12) connected with the hollow end portion (8) and provided with at least one opening for maintaining a flow of air around the tip (3), and the casting compound (11) also partially fills the protective cap (12).
- an interrogation device (IC3) having a plurality of inputs (1, 2, 5, 12-15) connected to respective ones of said sensing means (Rs1 -Rs7) and an output (3) connected to said threshold switch (IC51) and means (IC2) for connecting the sensors and the inputs (1, 2, 5, 12-15) of the interrogation device (IC3) with the output (3) of the interrogation device (IC3) periodically and one after the other; and
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21. Process for making a temperature sensor comprising a housing (6) having a base (9), a hollow end portion (8) remote from the base, said hollow end portion being at an open end of the housing, and a protective cap (12) on the open end of the housing, said protective cap being provided with at least one opening for maintaining a flow of air;
- plug-in connectors arranged within the housing (6) and a sensor element (1) in the form of a bead-heat conductor and having leads (5) and a tip (3) carrying a semiconductor bead (4), said sensor element (1) being arranged within said hollow end portion (8) so that said leads (5) are connected with the plug-in connectors and said tip (3) is arranged within said protective cap (12), wherein said hollow end portion (8) and partially also said protective cap (12) are filled by a casting compound (11) consisting of epoxy casting resin, said sensor element (1) being embedded in the casting compound (11) so that said tip (3) projects out of the casting compound (11), said process comprising the steps of;
a) providing the sensor element (1) with the leads connected to the plug-in connectors in the housing (6); b) filling the hollow end portion and at least a part of the protective cap with a mixture of a sealing compound and a hardener in a mixture weight ratio of said sealing compound to said hardener of 10;
1 to 10;
1.1 so as to form the casting compound, said filling continuing until only the tip of the bead conductor carrying the heat conductor bead projects out of the casting compound;c) heating the filled hollow end portion and the filled part of the protective cap of step d) at about 80°
C. for about 16 hours, then heating at about 120°
C. for about 3 hours and finally heating at about 180°
C. for about 3 hours so as to cure the casting compound; andd) allowing the filled hollow end portion and the filled part of the protective cap heated in step e) to cool to room temperature so as to form the temperature sensor. - View Dependent Claims (22, 23)
- plug-in connectors arranged within the housing (6) and a sensor element (1) in the form of a bead-heat conductor and having leads (5) and a tip (3) carrying a semiconductor bead (4), said sensor element (1) being arranged within said hollow end portion (8) so that said leads (5) are connected with the plug-in connectors and said tip (3) is arranged within said protective cap (12), wherein said hollow end portion (8) and partially also said protective cap (12) are filled by a casting compound (11) consisting of epoxy casting resin, said sensor element (1) being embedded in the casting compound (11) so that said tip (3) projects out of the casting compound (11), said process comprising the steps of;
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24. Temperature sensor comprising:
- a housing (6) having a base (9), and a hollow end portion (8) remote from the base and at an open end-of the housing and a protective cap (12) on the open end of the housing, said protective cap being provided with at least one opening for maintaining a flow of air, plug-in connectors arranged in the housing (6) and a sensor element (1) in the form of a bead-heat conductor having a glass tube with a tip (3) enclosing a heat sensing bead (4), and with leads (5) fastened to said bead (4) and being guided out of said glass tube, said sensor element (1) being arranged within said hollow end portion (8) so that said leads (5) are connected with the plug-in connectors and said tip (3) being arranged within said protective cap (12), wherein said hollow end portion (8) and partially also said protective cap (12) are filled by a casting compound consisting of epoxy casting resin (11), said sensor element (1) being embedded in the casting compound so that said tip (3) projects out of the casting compound.
Specification