Lowell Gauge...was Down Bearing

[Richard Brekne]

Strikes me as a very straight forward way of doing more or less the same 
thing as what Nossaman suggests doing with the Lowel gauge really. You 
are useing the speaking length as a kind of baseline, and figureing the 
rest from that... albiet without bubbles bubbling around.. :)

Skolnik seems to raise the point (as I read it) that the difference 
between the ideal flat surface top of the bridge... (yeilding two 
seperate angles) and the more real life condition of the string 
approaching a condition where it is actually curved around the bridge 
top is significant in terms of figuring downbearing.  Is it ?? I would 
have thought you could have figured the middle spot on the highest point 
of the string on the bridge (no matter how long) as a single point where 
the front and back lengths meet and create a single angle... more or 
less forming a simple triangle (with the straight line of the 
undeflected string) which could be interpreted as tension instead of 
distance and solved with simple vector geometry.

Cheers
RicB

John Hartman wrote:
> Bearing Heads,
> 
> ..... 
> Any straight grained hardwood will due, I like maple or cheery. Make 
> them in several lengths for each section of the tenor and treble. I Use 
> the same metal stacking gauges I use when setting the bearing with the 
> strings. If you must have angular deflections you simple look it up on a 
> chart. Since it reads the bearing in the same way I set bearing it gives 
> me fast and comprehensible feed back. It is interesting to see the 
> fluctuation due to changes in environmental RH.
> 
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> 
> John Hartman RPT
> 
> John Hartman Pianos
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> Rebuilding Steinway and Mason & Hamlin
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