[cctalk] Re: Philips P3800 key lock swtch

On Tue, Apr 8, 2025 at 4:43 PM Walter Belgers via cctalk <cctalk(a)classiccmp.org> wrote: I did reply privately but some of the comments can be public. I am thinking of (temporarily?) fitting a different lock and coupling it to the camshaft that works the microswitches. When I've got that done I'll know I can manage without the orginal lock if II have to (although I would want to get a key and refit the original lock if possible). So I would then be prepared to post it to somebody else. I think there is only one key. The lock is somewhat unsual though. There are 4 pins in the plug (the rotating part). There are 3 positions of the lock and the key is removeable in all 3. There are therefore 3 sets of upper pins and springs in the housing. The 3 positions are 'OFF' (anticlockwise), ON (centre), PM (clockwise). The visible holes in the housing were always empty, I've not removed anything there. I think they were there to allow the springs and upper pins to be inserted when the lock to be assembled. Note that the hole for the 'OFF' position are ofset away from the front of the lock. Here's what I think happens. In the ON position you can use the key and simply turn to PM. And go back again But to select OFF you have to push the key and plug inwards before turning the key. To turn on, you just turn the key (you can't go too far and select PM by accident), the plug will then spring forwards. There was a compression spring in the back of the lock, forcing the plug forwards. I have removed this now for the moment. The in/out motion of the plug is controlled by a pin (the end of which is the silver circle in the 'side' photo) running in a groove in the plug. -tony