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Author Topic: John Derbyshire or Davidson piano insulator  (Read 2093 times)

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Offline Lustrousstone

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Re: John Derbyshire or Davidson piano insulator
« Reply #10 on: June 15, 2016, 10:31:59 AM »
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

Offline Paul S.

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Re: John Derbyshire or Davidson piano insulator
« Reply #11 on: June 15, 2016, 12:53:27 PM »
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. :)   

Offline mhgcgolfclub

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Re: John Derbyshire or Davidson piano insulator
« Reply #12 on: June 15, 2016, 06:43:30 PM »
Nice one Paul

I just checked my uranium ones but different shape.

Roy

Offline Lustrousstone

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Re: John Derbyshire or Davidson piano insulator
« Reply #13 on: June 16, 2016, 06:33:11 PM »
My insulator is the same size as yours Paul. Bernard will be turning in his grave at you measuring old English glass in mm!!!

Offline Paul S.

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Re: John Derbyshire or Davidson piano insulator
« Reply #14 on: June 16, 2016, 06:46:08 PM »
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 ;D

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

Offline Lustrousstone

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Re: John Derbyshire or Davidson piano insulator
« Reply #15 on: June 16, 2016, 08:33:57 PM »
Absolutely nothing except muck  :-[ . Interestingly, mine has cooling wrinkles on the top, while your has them on the bottom

Offline neilh

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Re: John Derbyshire or Davidson piano insulator
« Reply #16 on: June 03, 2017, 03:31:14 PM »
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

Offline Paul S.

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Re: John Derbyshire or Davidson piano insulator
« Reply #17 on: June 03, 2017, 03:58:09 PM »
thanks for the explanation Neil.

 

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