Entry posted by Fen End Pit
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I've managed to have a go at fastening an extra micro-switch to be activated by the catch handle on a Shropshire and Herefordshire Area Group (spelled out in full to avoid being replaced by #####, the so-called scunthorpe problem) lever frame.
In order to make it so I could still take the levers apart I built it as follows:-
20mm of rectangle brass tube (K&S)
saw slot in the narrow side of the tube, this allows it to feed over the tag on the lever which holds the bottom of the spring
Drill a hole on the opposite side and tab 10BA
Solder a bit of brass on to act as a bracket to mount the micro-switch, drill with a couple of holes to match micro-switch fixing
I fitted the switch to the bracket and then reassembled the lever in the frame leaving the rectangular tube to be able to move on the lever.
I made a loop of brass wire to go around the loop on the bottom of the catch handle linkage (where the spring connects) and then over the tab on the micro-switch.
The photo probably makes this clear.
It may be possible to loose the supplied spring altogether and just use the spring in the micro-switch to pull the catch handle down. In that case you could probably not bother slotting the brass rectangular tube and instead just cut/file off the bottom hook on the lever. I wasn't brave enough to try this (yet)
A picture probably make it all clearer.
David
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