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On Sat, 24 Sep 2005 22:54:41 -0400, Gary Casey <glcasey@adelphia.net> wrote:
A third way would be to have the switch inside the door but make it so that you have to have continuity to make the light go > out, probably with an inverting relay. In that case the light would be on with the door in any position and it would only go > out if it was fully latched.
Gary,
Do you have the circuitry diagram for the inverting relay? Is this the same as a latching relay?
We looked at the door side of the latch mechanism and decided to try the following: Using a 5 button contact switch set. The third button of the set has been used for a "Door Pump On" light. The 4th brings power to the door microswitch and the 5th takes it back to the annunciator panel, thru the LED and then to the common ground of the annunciator panel.
The pin that holds the locking pawl in the bracket has a "C" clip in either side to hold it in. We took a c clip off and removed the pin, It is a 3/16" diameter, so we put an AN3 in to temporarily hold it. A friend is going to machine a new pin with the grooves in the same place but one end about 0.75" longer. It looks like we can install a simple NC lever microswitch on an angle bracket to catch the pin when the pawl is close to fully up against the pin of the fuselage latch. Will take some pictures of all the stuff if it works.
I also like Bob Pastuseks's approach on his LIVP. His is a little more complicated because you have to remove rool pin, remove the hex bolt, drill the head, and insert a roll pin to catch a microswitch. He has already done this so we'll use that if our idea does not work well.
Best,
John
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