公开(公告)号：US4058803A

公开(公告)日：1977-11-15

申请号：US666645

申请日：1976-03-15

申请人： Andreas Scheidweiler

发明人： Andreas Scheidweiler

IPC分类号： G08B17/11 ,  G08B17/10

CPC分类号： G08B17/11

摘要： Two ionization chambers are formed on the sensor, one including a pair of electrodes and ionizing substance, which are relatively so located that, in the space between the electrodes, the air will be ionized with both positive and negative ions so that the current flowing between the electrodes will be generated by ions of both polarities to form a bipolar ionization chamber; the other has the electrodes and the ionizing substance so located that at least in a portion, preferably a major portion of the space between the electrodes, ions of only a single polarity will occur. The bipolar chamber is shielded from air flow therethrough, the unipolar chamber, however, being exposed to free air flow. Preferably, a third or reference chamber may be combined with the sensor. The unipolar and bipolar chambers are connected to an evaluation circuit which responds when the current between the electrodes in at least one of the unipolar or bipolar chambers drops below a certain threshold value.

摘要翻译： 在传感器上形成两个电离室，一个电极和一个电离物质，它们相对地位于电极之间的空间中，空气将被正离子和负离子两个电离，使得电流在 电极将由两个极性的离子产生，以形成双极电离室; 另一个电极和电离物质的位置使得至少在电极之间的空间的一部分，优选地主要部分，将仅发生单极性的离子。 双极室被隔离通过其中的气流，但是单极室暴露于自由空气流中。 优选地，第三或参考室可以与传感器组合。 单极和双极室连接到评估电路，该评估电路当至少一个单极或两极室中的电极之间的电流下降到某一阈值以下时响应。

公开(公告)号：US5381130A

公开(公告)日：1995-01-10

申请号：US942141

申请日：1992-09-08

申请人： Marc Thuillard ,  Andreas Scheidweiler ,  Kurt Hess

发明人： Marc Thuillard ,  Andreas Scheidweiler ,  Kurt Hess

IPC分类号： G08B17/107 ,  G08B17/10

CPC分类号： G08B17/107

摘要： In a scattered-light smoke detector, for preventing false alarms due to extraneous matter in a measurement chamber (1), a radiation source (2) and two radiation detectors (7, 8) are included. An evaluation circuit is provided for comparing the two detector signals, and an alarm signal is triggered if at least one of the detector signals exceeds a predetermined threshold, and if the two detector signals are at least approximately equal. In another embodiment, a scattered-light smoke detector includes two radiation sources (2, 22), a radiation detector (7), and circuitry for alternatively activating one (2) or the other (22) radiation source. For comparison, corresponding detector signals are stored in sample-and-hold circuits, and an alarm signal can be triggered depending on the same tests. Furthermore, in both cases, a trouble signal can be produced if the two signals are significantly different.

摘要翻译： 在散射光检测器中，为了防止测量室（1）中的外来物质引起的假警报，包括辐射源（2）和两个辐射检测器（7,8）。 提供用于比较两个检测器信号的评估电路，并且如果至少一个检测器信号超过预定阈值，并且如果两个检测器信号至少近似相等，则触发报警信号。 在另一个实施例中，散射光烟雾探测器包括两个辐射源（2,22），辐射探测器（7）和用于交替激活一个（2）或另一个（22）辐射源的电路。 为了比较，相应的检测器信号存储在采样和保持电路中，并且可以根据相同的测试触发报警信号。 此外，在两种情况下，如果两个信号显着不同，则可以产生故障信号。

公开(公告)号：US4405919A

公开(公告)日：1983-09-20

申请号：US257783

申请日：1981-04-27

申请人： Andreas Scheidweiler

发明人： Andreas Scheidweiler

IPC分类号： G01N21/53 ,  G08B17/00 ,  G08B17/06 ,  G08B17/10 ,  G08B17/103 ,  G08B17/113 ,  G08B23/00 ,  G08B25/00 ,  G08B29/18

CPC分类号： G08B17/10 ,  G08B17/00 ,  G08B17/113

摘要： A fire alarm installation possessing increased intelligence which enables differentiating between smoldering fires and fires having open or licking flames. This capability is obtained in that the fire alarm installation possesses two sensor elements working according to different functional principles and an evaluation circuit contains circuit elements which form the quotient of the signals received from both sensor elements. The different sensor elements can be united in a single fire alarm housing which simultaneously contains the evaluation circuit.

摘要翻译： 火灾报警装置具有增加的智能，能够区分闷烧的火焰和具有开放或舔火的火焰。 获得这种能力是因为火灾报警装置具有根据不同功能原理工作的两个传感器元件，并且评估电路包含形成从两个传感器元件接收的信号的商的电路元件。 不同的传感器元件可以联合在同时包含评估电路的单个火灾报警器壳体中。

公开(公告)号：US4404548A

公开(公告)日：1983-09-13

申请号：US271187

申请日：1981-06-08

申请人： Peter Mueller ,  Eugen Schibli ,  Andreas Scheidweiler ,  Jurg Muggli

发明人： Peter Mueller ,  Eugen Schibli ,  Andreas Scheidweiler ,  Jurg Muggli

IPC分类号： G08B25/00 ,  G08B17/00 ,  G08B26/00 ,  G08B29/02 ,  G08B29/06

CPC分类号： G08B26/005 ,  G08B17/00

摘要： In a fire alarm system individual fire alarms are connected in series by reporting lines with a central signal station. In order to be able to connect a greater number of fire alarms with the individual reporting or signaling lines and/or in order to be able to dispatch an increased amount of current through the reporting lines, the reporting or signaling lines from the last fire alarm of a line are returned back to the central signal station in the form of a ring circuit or loop. Upon the absence of signals at a reporting line an interrogation device is reversed, so that there can be ensured that in the event of a line disturbance or breakdown of a fire alarm the remainder of the fire alarms still can be utilized for giving a signal. The individual fire alarms are structured such that during assembly the inputs and outputs can be mutually interchanged.

摘要翻译： 在火灾报警系统中，通过向中央信号站报告线路，各个火灾报警器串联连接。 为了能够将更多数量的火警与各个报告或信令线路连接起来，和/或为了能够通过报告线路发送增加的电流，报告或信令线路从最后的火灾报警 一行以环形电路或回路的形式返回到中央信号站。 在报告线路上没有信号时，询问装置被反转，从而可以确保在线路干扰或火灾报警器故障的情况下，剩余的火灾报警器仍然可以用于给出信号。 各个火灾报警器的结构使得在组装期间，输入和输出可以相互互换。

公开(公告)号：US4194120A

公开(公告)日：1980-03-18

申请号：US853434

申请日：1977-11-21

申请人： Otto Meier ,  Andreas Scheidweiler

发明人： Otto Meier ,  Andreas Scheidweiler

IPC分类号： G01N27/04 ,  G01N27/64 ,  G08B17/10 ,  G08B17/113 ,  H01J39/28

CPC分类号： G08B17/113

摘要： An ionization chamber with two electrodes having a variable spacing and with a radioactive source for the ionization of the electrode gap therebetween includes an adjusting mechanism for the positional adjustment of one of the electrodes relative to the other. The mechanism is such that a spring element presses the adjustable electrode against at least one point of the adjusting mechanism.Several arrangements are disclosed for adjustably mounting a cup-shaped electrode in the housing of the chamber in such a manner that it is readily adjustable and will not undergo spurious readjustment as a result of vibration of shock.

摘要翻译： 具有可变间隔的两个电极和用于电极间隙电离的放射源的电离室包括用于相对于另一个电极之一位置调节的调节机构。 该机构使得弹簧元件抵靠调节机构的至少一个点压紧可调节电极。 公开了几种用于可调节地将杯形电极安装在腔室的壳体中的布置，使得其容易调节并且由于冲击的振动而不会进行虚假的重新调整。

公开(公告)号：US4109240A

公开(公告)日：1978-08-22

申请号：US741750

申请日：1976-11-15

申请人： Andreas Scheidweiler

发明人： Andreas Scheidweiler

IPC分类号： G08B17/11 ,  G08B17/10

CPC分类号： G08B17/11

摘要： An ionization chamber is exposed to the atmosphere to be supervised, the ionization chamber being so constructed that the electrical resistance thereof changes in the presence of fire particles or aerosols upon occurrence of a fire; to improve reliability of detection, the ionization chamber is connected as a resistance element in a free-running multivibrator oscillator circuit, which includes a pair of cross-coupled field effect transistors (FET's) so that, upon change of the atmosphere to which the ionization chamber is exposed, the pulse frequency of the oscillator changes, which change is detected by a pulse rate detector. If the detector has upper and lower threshold levels, deviation of pulse rate in one direction may be used to sense presence of a fire, and in the other direction may be used to sense incipient trouble in the circuit itself.