DE576683C - Safety device for premises with the help of several radiation paths - Google Patents
Safety device for premises with the help of several radiation pathsInfo
- Publication number
- DE576683C DE576683C DE1930576683D DE576683DD DE576683C DE 576683 C DE576683 C DE 576683C DE 1930576683 D DE1930576683 D DE 1930576683D DE 576683D D DE576683D D DE 576683DD DE 576683 C DE576683 C DE 576683C
- Authority
- DE
- Germany
- Prior art keywords
- premises
- help
- safety device
- radiation paths
- several radiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Sicherheitsvorrichtung für Räumlichkeiten mit Hilfe von mehreren Strahlungswegen Es sind Anordnungen bekannt, um mit Hilfe von Strahlung einen Raum gegen Betreten zu sichern, bei welchem zur Ausschaltung von Stromschwankungen der Sendelampe der Strahlenweg geteilt und auf zwei Einzelempfänger geleitet wird. . Die beiden letzteren, z. B. Thermoelemente, werden zweckmäßigerweise gegeneinander geschaltet, so daß normalerweise Stromlosigkeit herrscht und nur bei Abblendung des einen Strahlenweges der Differenzstrom auf das Relais wirkt. Die Teilung der Strahlenwege ist schon seit langem bei optischen Photometern üblich, z. B. dem bekannten Hartmannschen Mikrometer, und auch neuerdings auf die lichtempfindlichen Photometer übernommen. Das gleiche Verfahren, nämlich die Verwendung von zwei Strahlenwegen, ist auch schon zur Rauchgasanalyse bzw. zur Raumschutzsicherung angewendet worden. Im Prinzip unter sich gleich, haben diese Anordnungen jedoch den Nachteil, daß kein Alarm ausgelöst wird, wenn auf irgendeine Weise die beiden Strahlenwege gleichzeitig abgeblendet werden, wie es durch mechanische Mittel oder von zwei gut eingeübten Personen möglich erscheint. Auf diese Weise wird also der in schaltungstechnischer Beziehung gewonnene Vorteil der beiden Strahlenwege wieder illusorisch gemacht.Safety device for premises with the help of several radiation paths Arrangements are known to prevent entry into a room with the aid of radiation to secure, in which to switch off current fluctuations of the transmitter lamp the Beam path is divided and directed to two individual receivers. . The latter two, z. B. thermocouples are advantageously switched against each other so that normally there is no current and only when one beam path is dimmed the differential current acts on the relay. The division of the beam paths is nice has long been common in optical photometers, e.g. B. the well-known Hartmannschen Micrometer, and has recently been adopted by light-sensitive photometers. The same procedure, namely the use of two beam paths, is also fine has been used for smoke gas analysis and room protection. In principle under the same, however, these arrangements have the disadvantage that no alarm is triggered if in some way the two beam paths are blocked out at the same time as possible by mechanical means or by two well-trained people appears. In this way, the one obtained in terms of the circuitry is obtained Advantage of the two beam paths made illusory again.
Die Erfindung umgeht diesen Nachteil dadurch, daß Empfangssysteme benutzt werden, welche verschieden große Trägheit gegenüber Änderungen der Bestrahlung besitzen. Diese Trägheit kann z. B., falls es sich um -Wärmestrahlung handelt, durch verschieden große Maße der empfangenden Thermoelemente erzielt werden. Die Trägheit, welche man willkürlich in den einen Teil der Empfangsapparatur einführt, braucht aber nicht notwendigerweise in dem Thermoelement zu liegen. Wenn dieses auch aus technischen Gründen der einfachste Weg ist, so besteht jedoch noch die Möglichkeit, z. B. denjenigen Teil des Empfangsrelais, welcher von dem einen Strahlenweg betätigt wird, mit einer von dem übrigen unterschiedlichen Zeitkonstanten zu versehen. In jedem Fall aber, und das ist das Wesentliche der Erfindung, erfolgen in der Relaisapparatur, an welche die beiden Strahlenwege bzw. Empfangssysteme angeschlossen sind, die Stromimpulse mit . einer gewissen Phasenverschiebung auch dann, wenn die Abschaltung der beiden Strahlenbündel durch irgendein Hindernis zu gleicher Zeit eintreten sollte.The invention avoids this disadvantage in that receiving systems be used, which different degrees of inertia with respect to changes in the irradiation own. This inertia can e.g. B., if it is heat radiation through different sizes of the receiving thermocouples can be achieved. The indolence which one arbitrarily introduces into one part of the receiving apparatus but not necessarily residing in the thermocouple. If this one too is the easiest way for technical reasons, but there is still the possibility z. B. that part of the receiving relay which actuates one of the beam paths is to be provided with a different time constant from the rest. In in any case, and this is the essence of the invention, take place in the relay apparatus, to which the two beam paths or receiving systems are connected, the current pulses with . a certain phase shift even when the shutdown of the two Beams should enter through any obstacle at the same time.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE576683T | 1930-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE576683C true DE576683C (en) | 1933-05-16 |
Family
ID=6570019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930576683D Expired DE576683C (en) | 1930-04-16 | 1930-04-16 | Safety device for premises with the help of several radiation paths |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE576683C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189413B (en) * | 1961-01-03 | 1965-03-18 | Pyrotector G M B H | Flame measuring and signaling device with a detector and a signal circuit |
DE1616017B1 (en) * | 1967-01-27 | 1972-03-09 | Hughes Aircraft Co | Surveillance system |
US4531170A (en) * | 1981-05-18 | 1985-07-23 | Tokyo Shibaura Denki Kabushiki Kaisha | Combination magnetic head |
-
1930
- 1930-04-16 DE DE1930576683D patent/DE576683C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189413B (en) * | 1961-01-03 | 1965-03-18 | Pyrotector G M B H | Flame measuring and signaling device with a detector and a signal circuit |
DE1616017B1 (en) * | 1967-01-27 | 1972-03-09 | Hughes Aircraft Co | Surveillance system |
US4531170A (en) * | 1981-05-18 | 1985-07-23 | Tokyo Shibaura Denki Kabushiki Kaisha | Combination magnetic head |
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