Technology and Operations
This forum is for discussing technological & operational matters pertaining to U-boats.
U-Boat Alarms
Posted by:
Scott Sorenson
()
Date: November 04, 2008 03:40PM
Dear Bobby Boyce,
Some time ago you asked about the U-boat alarms, the location and what they look like. I did some reseach and I might have found your answer.
The alarms consists essentially of seven watertight magnetic-ally operated vibrator type bells which are located one each as follows:
Aft Torpedo Room
Maneuvaring Room
Engine Room
Control Room
Officer's Quarters
Crew's Quarters Forward Torpedo
In parallel with the engine Room and Maneuvering Room bells, a visual system is installed to insure attention is drawn to the alarm signal. This portion of the system operates as follows. The compartment illumination circuit is led into a relay, the coil of which is energized through the normally closed contacts of an inductance capacitance type vibrator which in turn is only energized when the alarm system is energized. Thus, when the alarm circuit is energized, the compatment illumination flashes on and off at a rate of approximately 90-120 time per minute.
The system is energized from the ship's 110 V regulated D.C. bus. The control points are the C.T. and C.R. Rotary type snap switches are used for the purpose and provision is made for energizing at one compartment and de-energizing at the other compartment.
The components are of water tight construction, being manufactured from cast aluminum, fabricated sheet metal and the necessary other materials. Water tight seals are of eight O ring design or socket type rubber gaskets. Terminal blocks used throughout the system.
The German used of a flashing compartment illumination system at points of high noise intersity in conjunction with the diving alarm system is noteworthy.
I hope this helps answer your question.
Scott
Some time ago you asked about the U-boat alarms, the location and what they look like. I did some reseach and I might have found your answer.
The alarms consists essentially of seven watertight magnetic-ally operated vibrator type bells which are located one each as follows:
Aft Torpedo Room
Maneuvaring Room
Engine Room
Control Room
Officer's Quarters
Crew's Quarters Forward Torpedo
In parallel with the engine Room and Maneuvering Room bells, a visual system is installed to insure attention is drawn to the alarm signal. This portion of the system operates as follows. The compartment illumination circuit is led into a relay, the coil of which is energized through the normally closed contacts of an inductance capacitance type vibrator which in turn is only energized when the alarm system is energized. Thus, when the alarm circuit is energized, the compatment illumination flashes on and off at a rate of approximately 90-120 time per minute.
The system is energized from the ship's 110 V regulated D.C. bus. The control points are the C.T. and C.R. Rotary type snap switches are used for the purpose and provision is made for energizing at one compartment and de-energizing at the other compartment.
The components are of water tight construction, being manufactured from cast aluminum, fabricated sheet metal and the necessary other materials. Water tight seals are of eight O ring design or socket type rubber gaskets. Terminal blocks used throughout the system.
The German used of a flashing compartment illumination system at points of high noise intersity in conjunction with the diving alarm system is noteworthy.
I hope this helps answer your question.
Scott
| Subject | Written By | Posted |
|---|---|---|
U-Boat Alarms
|
Scott Sorenson | 11/04/2008 03:40PM |
|
Re: U-Boat Alarms
|
ThomasHorton | 11/10/2008 01:41PM |