Topic: John Derbyshire or Davidson piano insulator

[Lustrousstone]

My insulator is unmarked (I've checked) and yes I've made an assumption, but I would argue the colour does not rule Davidson out (the thicker the yellow uranium glass, the more green is observed in my experience).
I have three Davidson non-pearline yellow uranium pieces (and some green ones)
http://lustrousstone.co.uk/cpg/displayimage.php?pid=1434
http://lustrousstone.co.uk/cpg/displayimage.php?pid=1281
http://lustrousstone.co.uk/cpg/displayimage.php?pid=908

Paul can you measure your insulator please

[Paul S.]

this insulator is noticeably wider at the base than the top - a truncated shape - and measurements are..........

diameter at top.......          90mm
diameter at base...........    98mm
height               ...........    45mm

and in view of the lack of wear inside the cavity where a castor would sit, am assuming it hasn't seen service for the purpose for which it was intended.    

[mhgcgolfclub]

Nice one Paul

I just checked my uranium ones but different shape.

Roy

[Lustrousstone]

My insulator is the same size as yours Paul. Bernard will be turning in his grave at you measuring old English glass in mm!!!

[Paul S.]

thanks Christine  -  it does appear there is a good probability both are the same design and from the same source, originally - which looks to be JD.

I was educated at a time when imperial ruled the roost, but spent my working life dealing with products that were measured mostly in metric, so I had the best of both worlds, and switching from one to the other isn't a problem.          I'd find it difficult saying 3 and 36/64ths inches instead of 90 mm

Assume you have really looked at the underside of yours for even the faintest of marks.

[Lustrousstone]

Absolutely nothing except muck  . Interestingly, mine has cooling wrinkles on the top, while your has them on the bottom

[neilh]

I've picked up an example of this insulator today in a standard green colour. There is no JD mark, though maybe their moulds were sold on after one or more of their financial blowouts?

Paul, when I was referring to 3 JD piano foot designs, I was probably adding the 1877 bulls head example as the third. It was made at the same works, though by then they were renamed to Regent Road Glass Works

[Paul S.]

thanks for the explanation Neil.