it's ideas not science. consider it brainstorming, please don't be so critical...often.
the dictionary is a source for words not understood. but you're right they do sound a little 'made up'... ha ha! you didn't check the dictionary did you?
don't the words show motion---go on imagine 'actu-ator'... wow, i can just see that dial slowly rotating---then reversing? that's the magic of the pen and the power of the word!
as for the attachment point 'square ('bent up' piece at # fifteen) in round hole' (simply a spring). or maybe it's just bent up for balance or to scratch something...no! i think it has the purpose of being "THE" attachment point that enables the dial to be rotated either and in both directions.
or, should i slam you and say there is no way for anything to connect "under the small space under the rivet". no, i will use your idea possibly to assist my mind in future thoughts. quit slamming me please and others! (if you don't mind me saying so!). it is embarrassing for you to point out that my stupid ideas are stupid when they actually have some value somehow to somebody, maybe only one somebody but that somebody may get something from my stupid idea (or yours) that further motivates their thought process to provide this forum with another stupid idea that might just lead to an "id-------banner!!!!!
have you ever seen a soccer team bickering on the field at each other (on the same team)? come on...we are in this together.
my thoughts and expressing them (without the fear of repercussion!) is just to show (my idea!) that there is a way to connect to the bent up piece. you have an unnatural way of 'hopping on' or 'harping on' a previous posts.
(because i feel there is a way to connect to that bent up piece!) try this one... if a flat-thin-light-weight rod had a cup that swiveled near the end at a 90 degree. and the cup, though upside down sitting over the 'bent up' piece, was made to receive the flat bent piece. (in other words the 'bent up' piece has a hat, that swivels on a rod, at 90 degrees, that goes to the source of movement for the dial!) then the rod is moved in an arc necessary to rotate the dial......
i have no problem with you. please don't think i am being harsh toward you. i am just trying to defend my right to offer ideas in any forum without being bashed. please accept this reasoning as purely defensive and let's go on hopefully finding value in others views.

(i just know you are going to knit pick a word, or a sentence, or a paragraph from this post and slam me. please spare me and the rest of t net.