AT77290B - Safety device for traction sheave hoists. - Google Patents
Safety device for traction sheave hoists.Info
- Publication number
- AT77290B AT77290B AT77290DA AT77290B AT 77290 B AT77290 B AT 77290B AT 77290D A AT77290D A AT 77290DA AT 77290 B AT77290 B AT 77290B
- Authority
- AT
- Austria
- Prior art keywords
- safety device
- traction sheave
- hoists
- contacts
- electromagnetic switch
- Prior art date
Links
Landscapes
- Control And Safety Of Cranes (AREA)
Description
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dynamo einen Widerstand in passender Grösse, der normalerweise durch die Kontakte eines elektromagnetischen Schalters kurzgeschlossen ist. Die Spule dieses elektromagnetischen Schalters ist einmal unmittelbar, das andere Mal über eine elektrische Stromquelle mit den beiden Kontakten der Vorrichtung 22 verbunden. Werden also diese Kontakte beim Eintritt des Seilrutsches oder hei sonstiger Unregelmässigkeit geschlossen, so erhält der elektromagnetische Schalter Strom und wird geöffnet. Dadurch wird der Kurzschluss am Widerstand des Erregerstromkreises der Steuerdynamo aufgehoben und dieser Widerstand in den Erregerstromkreis eingeschaltet.
Die Spannung der Hteuerdynamo und damit die Geschwindigkeit des Fördennotors sinken dann unter den Wert, bei dem die Fördermaschine jederzeit mit kurzen Auslaufweg stillgehalten werden kann, so dass der Maschinist in der Lage ist, beim Einfahren in die Hängebank den eingetretenen Seilrutsch ohne Gefahr für die Fördermaschine zu berücksichtigen.
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dynamo has a resistor of the appropriate size, which is normally short-circuited by the contacts of an electromagnetic switch. The coil of this electromagnetic switch is directly connected to the two contacts of the device 22 on the one hand and via an electrical power source on the other. If these contacts are closed when the zip line or other irregularity occurs, the electromagnetic switch receives current and is opened. This removes the short circuit at the resistance of the excitation circuit of the control dynamo and this resistor is switched on in the excitation circuit.
The tension of the control dynamo and thus the speed of the conveyor motor then fall below the value at which the conveyor machine can be stopped at any time with a short run-out distance, so that the machine operator is able to avoid the rope slip that has occurred when entering the suspension bank without endangering the conveyor machine to consider.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE77289X | 1915-09-04 | ||
| DE77290X | 1916-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT77290B true AT77290B (en) | 1919-07-25 |
Family
ID=25749688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT77290D AT77290B (en) | 1915-09-04 | 1917-05-31 | Safety device for traction sheave hoists. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT77290B (en) |
-
1917
- 1917-05-31 AT AT77290D patent/AT77290B/en active
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