So Here We Go.... Rules Or Scales

[hermetic]

yes, it is full scale, and i have to admit i don't know what a hook scale is!

 

[Bill Gruby]

Phil;

This is a hook scale. http://www.ebay.com/itm/NEW-STARRET...376092?hash=item2eeac68bdc:g:xfAAAOSwUV9Wnx8h

"Billy G"

 

[Eddyde]

Phil;

This is a hook scale. http://www.ebay.com/itm/NEW-STARRET...376092?hash=item2eeac68bdc:g:xfAAAOSwUV9Wnx8h

"Billy G"

It is a hook rule, or a rule with hook, according to the maker:
http://www.starrett.com/metrology/m...isplayMode=grid&itemsPerPage=24&sortBy=wp/asc

If the almighty Starrett company calls it a Rule, that's good enough for me.

 

[mws]

I've always considered "scale" to refer to a fixed mathematical relationship to another known standard. For instance; the "scales" on your hand wheels may be marked for 0.001" increments but are 0.050" apart, or a scale drawing.
A "rule" is a tool for marking off fixed increments or lines, either using a scale or an actual fixed measurement standard. In the latter case it becomes a "ruler".
Just my take on things. I'm also in electronics and spent much of my career calibrating laboratory equipment. Given all my time dabbling in things "metrological" I can't remember getting into the rule, scale, ruler debate ever. Guess it all seemed fairly obvious at the time.

 

[hermetic]

Thanks Bill et al, I don't think I have seen those this side of the pond, I will have a poke about!
Phil