Chapter 12 - Clocks and Associated Devices - Miscellaneous Clockwork Mechanisms: Verzogerungs Kontakt (VK) (Delay Contact)Chapter 12 - Clocks and Associated Devices - Period Delay Mechanisms (P.D.M.): Mechanical P.D.M.
GERMAN UNDERWATERS ORDNANCE MINES
Chapter 12 - CLOCKS AND ASSOCIATED DEVICES
MISCELLANEOUS CLOCKWORK MECHANISMS
VERZOGERUNG WERKE (VW) (DELAY CLOCK)

The VW is a spring-wound six-day scuttling clock used in the EMS mine. It can be set from six hours to six days by intervals of six hours. Figure 294

Operation. A soluble washer is switch C, figure 295, dissolves, allowing a potential to be applied across terminals 1 and 3, which blows fuse F and starts the clock. After the clock runs for approximately 10 minutes, arming switch A closes and the mine is armed. At the end of the preset time, scuttling switch B closes, placing the detonator across the battery to destroy the mine.

Figure 294– VW

Figure 295 – VW in EMS Mine Circuit

Chapter 12 - Clocks and Associated Devices - Miscellaneous Clockwork Mechanisms: Verzogerungs Kontakt (VK) (Delay Contact)Chapter 12 - Clocks and Associated Devices - Period Delay Mechanisms (P.D.M.): Mechanical P.D.M.