Sliding mechanism with lock

[ashjunkmail]

Hello, I'm trying to design a holder for a Digital Dial indicator. The idea is to use it has a height gauge. Something like this but it holds the dial indicator. I have a requirement to allow the dial indicator to travel up and down, the lock in place to adjust for Higher or lower levels of measuring. I was thinkin of using a sliding dovetail for the travel, but I'm not sure how to add a locking feature into it so it stays in place? 

[etfrench]

Do you want the display to have several different places where it's attached to the stand, or do you want to lock the scale in different positions?

[ashjunkmail]

Hello, Thanks for the reply, the Measuring Pin only has a 1 inch reach, so ideally I would like to have the Display slide upwards so that I can measure 3-5 inches