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Posted by 1501 on January 24, 2008, 7:39 am
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I've been comparing these two devices and cannot spot any real
difference other than the RDG is cheaper and ready made and the Thomas
one is a kit from Hemingway. Has anyone else got an opinion?
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Posted by Tony Jeffree on January 24, 2008, 7:53 am
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On Thu, 24 Jan 2008 04:39:56 -0800 (PST), 1501
>I've been comparing these two devices and cannot spot any real
>difference other than the RDG is cheaper and ready made and the Thomas
>one is a kit from Hemingway. Has anyone else got an opinion?
The RDG one looks great value to me. Saw one at the last show I
attended (Warwick?) and as you say, looks exactly like a Thomas VDH.
No idea how well it is made though.
Regards,
Tony
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Posted by David Littlewood on January 24, 2008, 12:36 pm
Please log in for more thread options >On Thu, 24 Jan 2008 04:39:56 -0800 (PST), 1501
>
>>I've been comparing these two devices and cannot spot any real
>>difference other than the RDG is cheaper and ready made and the Thomas
>>one is a kit from Hemingway. Has anyone else got an opinion?
>
>The RDG one looks great value to me. Saw one at the last show I
>attended (Warwick?) and as you say, looks exactly like a Thomas VDH.
>No idea how well it is made though.
>
Yes, in fact it looks from the photo to be so similar that it would, but
for one important fact, infringe the Design Right under S 213 of the
Copyrights, Designs and Patents Act of 1988. (AFAIK, GHT licensed his
designs and drawings to Hemingway, which still sells them albeit after 2
changes of ownership.)
The important fact is that, sadly, such rights did not exist before the
1988 act, and designs published before then were protected only by
copyright, making it more problematical to pursue remedies. GHT
published the book in 1983, and I think the design might have been in ME
even earlier. Even so, if the rights were mine, I should be considering
a chat with Messrs Sue, Grabbit and Run.
I made a GHT VDH in the 80s, and I certainly learned more about
precision engineering from that than almost anything else. Still, life
is short, and if someone had offered a good quality ready-made version
at the time I would have been tempted.
David
--
David Littlewood
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Posted by PG1D/PA-11Ø12 on January 25, 2008, 5:34 pm
Please log in for more thread options > I made a GHT VDH in the 80s, and I certainly learned more about precision
> engineering from that than almost anything else. Still, life is short, and
> if someone had offered a good quality ready-made version at the time I
> would have been tempted.
>
> David
VWP (very well put). l like this phrase. The engineer's dilemma...
Dirk
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Posted by ravensworth2674 on January 25, 2008, 6:32 pm
Please log in for more thread options I, too, have made a GHT VDH but his Universal Pillar Tool is still to
finish.
With one of these Mill/Drill affairs, I bought a Vertex dividing head
but with the ability to be tilted to form a rotary table and with a
Myford nose to fit my lathes.
OK the Vertex is too big for the Myfords but I would still like a
headstock dividing attachment and a graduation marking tool by R.Main
but one which automatically turns with each stroke- done by F J
Langfield in ME. This would work in conjunction with the GHT HDA.
So I agree with David and this would have enabled me to watch another
set of wheels do the thinking.
Norman
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>difference other than the RDG is cheaper and ready made and the Thomas
>one is a kit from Hemingway. Has anyone else got an opinion?