Attached are images of a no9 L-Delay switch i have finished cutting today, I recieved this in very poor overall condition as can be seen in the image showing it opened up during stripping down..
these used a lead element which stretches over time whilst under tension,a lead rod is connected to the striker at one end along with a spring that is connected to the lower part of the casing.This causes the spring to stretch under tension ,once the safety pin is removed the pulling of the spring causes the lead to stretch until it breaks ,this then releases the striker which flies forward into the percussion cap initiating the explosive charge it is connected to,,
they came with preset delays o f 1, 6, 12, 24 hours,also 3, 7, 14 and 28 day delays,
over 5 million of these were produced by MD1
a more detailed page describing method of operation is attached
these used a lead element which stretches over time whilst under tension,a lead rod is connected to the striker at one end along with a spring that is connected to the lower part of the casing.This causes the spring to stretch under tension ,once the safety pin is removed the pulling of the spring causes the lead to stretch until it breaks ,this then releases the striker which flies forward into the percussion cap initiating the explosive charge it is connected to,,
they came with preset delays o f 1, 6, 12, 24 hours,also 3, 7, 14 and 28 day delays,
over 5 million of these were produced by MD1
a more detailed page describing method of operation is attached
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