PSN-L Email List Message

Subject: Re: SPRENGNETHER 201 LONG PERIOD VERTICAL SEISMOMETER
From: "meredith lamb" paleoartifact@.........
Date: Wed, 20 Aug 2008 20:05:19 -0600


Hi Dick,

Thanks for the dimensions of the springs you have on your vertical.  Right
off....I can't imagine springs with holes in them
as being "the" original Sprengnether springs; mainly because I can't think
of a need/use for the holes...unless the holes
were some sort of crude visual positional indicators.  Logically; it would
seem that all 3 of us, are using "handy replacements"
put therein by the previous owners.   Its interesting that they all "work"
to whatever degree; with the vertical/s.

Take care, Meredith


On Wed, Aug 20, 2008 at 3:57 PM, Dick Webb  wrote:

> Sorry, that was 0.4 to 0.5 mm thick.  I only have a non digital old time
> mechanical micrometer.
> Dick
>
>
> Dick Webb wrote:
>
>> The dimensions are 0.05 mm thick by 6.3 mm wide and 4.5 cm long.  Also,
>> there are three holes at each end, the space between the central holes is
>> 2.3 cm.  It looks kind of like this:             000          000
>>
>> Hope this helps.
>> Dick
>>
>>
Hi Dick,

Thanks for the dimensions of the springs you have on your vertical.  Right off....I can't imagine springs with holes in them
as being "the" original Sprengnether springs; mainly because I can't think of a need/use for the holes...unless the holes
were some sort of crude visual positional indicators.  Logically; it would seem that all 3 of us, are using "handy replacements"
put therein by the previous owners.   Its interesting that they all "work" to whatever degree; with the vertical/s.

Take care, Meredith


On Wed, Aug 20, 2008 at 3:57 PM, Dick Webb <dwebb002@.............> wrote:
Sorry, that was 0.4 to 0.5 mm thick.  I only have a non digital old time mechanical micrometer.
Dick


Dick Webb wrote:
The dimensions are 0.05 mm thick by 6.3 mm wide and 4.5 cm long.  Also, there are three holes at each end, the space between the central holes is 2.3 cm.  It looks kind of like this:             000          000

Hope this helps.
Dick



[ Top ] [ Back ] [ Home Page ]