Seeing as how this has gone seriously off-topic already, this was my grandfather's mechanical pencil. Circa 1930. ...
View attachment 278319
Nice—Faber Castell? That flared end was intended as a pipe tamper.
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Seeing as how this has gone seriously off-topic already, this was my grandfather's mechanical pencil. Circa 1930. ...
View attachment 278319
Nice—Faber Castell? That flared end was intended as a pipe tamper.
Over years and countries probably many hundreds of established tool companies...while Starrett, Brown & Sharpe, Lufkin and others competed, they also recognized good design and execution. So while they mimicked ideas, object size a proprietary element. So, a variety of brands necessitate variety of snugs, scriber clamps. Goes so far they generated what some call 'bastard threads'. Kind of. Manufactured assemblies need screws and fittings, ad infinitum. Being full house captive shops they made their own taps and dies too. SAE, USS, BSS, DIN were decades away. When designer X had a slim indicator body, little screws were mandatory, he specified sufficient thread depth and selected a functional pitch [TPI]"What blows me away is no matter how many snugs and adapters I accumulate I still get stumped and don't have some odd size to do something".
A height gauge isn't a calibration item.
Not trying to split hairs pontiac428, is it only vernier height gage that isn't? As there are dial and digital height gages too. I'll bet they need to be calibrated. But not sure.
Yeah, well, I don't think mechanical drawing is taught in school anymore. So many kids don't even know which way to turn a screw to tighten or loosen it, much less what a ratchet is or is for. Sad.
Trend quite some time, at inspection, been to avoid interpretive measuring, for digital readouts. Calibration Exempt rarely means 'reliability assured'. These days; exempt is 'we don't know how', and 'customers coming in can't even read it'.Not trying to split hairs pontiac428, is it only vernier height gage that isn't? As there are dial and digital height gages too. I'll bet they need to be calibrated. But not sure.
Sorry. Not so little story, but true!