Re: Re: laser edge finder

> Graham.
>
> Catspaw is simply a piece of tubing with tapped holes in its wall
> for sets of screws angling inwards towards the work.
>
> Usually 2 sets of eitehr 3 or 4 holes. The effect is a versatile
> chuck for oddly shaped parts, or just a means to accurately place
> evena simple object into a known position.
>
> Gunscope and telescope tube mounts are analogous. For that matter,
> the "kleinbauer" 4bolt rail mount, taken in pairs on each rod is the
> same thing. It allows easy and precise alignment of the rail in all
> three axes.
>
> Sometimes machinists say "spider" instead of "catspaw". Depends on
> whether the projecting screws look like claws or legs, I suppose.<G>
>
> Ballendo

For 'Catspaw@ read Cathead.
Two types, the loose ones as 'loosly' described above and the type that runs in it's own bearing.

John S.