Kay, also could you send a picture of your AS1, with the wire pivot?

Thanks, Ted


----- Original Message ----- 
From: "Ted Channel" 
To: 
Sent: Friday, November 18, 2011 2:52 PM
Subject: Re: Spring for AS-1 type vertical seismometer


> Thanks, Kay,  Yes may I have the parts list?   tchannel@............
>
> Ted
>
>
> ----- Original Message ----- 
> From: "Kay Wyatt" 
> To: 
> Sent: Friday, November 18, 2011 2:47 PM
> Subject: Re: Spring for AS-1 type vertical seismometer
>
>
>> Sorry about the delay in getting back to you.  I was in a bad accident 
>> followed by surgery and physical therapy. But I am happy to say that I am 
>> now walking again and back at my computer.
>>
>> The AS-1 came with 2 sizes of springs.  The early AS-1s had a very narrow 
>> diameter spring and the newer AS-1s came with a 3/8" diameter spring.  I 
>> used McMaster-Carr for about 3/4 of the items that I needed for the 
>> seismometer.  The spring that I used is their part number 9664k19 
>> described as "Spring-Tempered Steel Cont Extension Spring 36" Length, 
>> 3/8" Outside Diameter, .035" Wire":
>>    http://www.mcmaster.com/#9664k19/=ezpnh8
>>
>> Another question that I get asked often is what type of wire I used for 
>> the pivot point.  I ordered it from www.SmallParts.com which is another 
>> supplier that I like.  It is called "music wire" and is .020 inches in 
>> diameter.  The part number is SMW-020-36-10 and is at
>>    http://www.smallparts.com/dp/B001383CPS/ref=sp_dp_g2c_asin
>> I have plenty extra of the music wire if you want me to mail it to you.
>>
>> I order all of my magnets from K&J Magnetics at www.kjmagnetics.com
>> The magnetic damping devices requires four of part #BX084 which are 1" x 
>> 1/2" x 1/4"
>> The sensor assembly requires four of part #BX0X02 which are 1" x 1" x 
>> 1/8"
>>
>> I have a complete part list that I can supply anybody that wants it.
>>
>> Thanks!
>> Kay Wyatt
>>
>>
>>
>> -----Original Message----- 
>> From: tdavisjb
>> Sent: Thursday, November 17, 2011 9:37 PM
>> To: PSN Listserver
>> Subject: Spring for AS-1 type vertical seismometer
>>
>> Folks,
>> I am building a vertical seismometer based on drawings put together by 
>> Kay
>> Wyatt (with help from Chris Chapman), it uses a piano wire hinge and the
>> coil is attached to the boom. My current problem is locating a spring for
>> this thing. I have found one at the local hardware store, it's long 
>> enough
>> (about 14") but it's pretty large in diameter and perhaps a bit too 
>> stiff.
>> I have tried to contact Kay but have had no luck. I work in a middle 
>> school
>> here in Portland (I'm the tech support person) and we have 2 AS-1's that 
>> I
>> maintain. Their springs are much smaller in diameter. So I am wondering 
>> if
>> any one on the list knows where, or how I would go about obtaining such a
>> spring.
>> I might mention that I have built two horizontal seismometers based on 
>> the
>> design that Chris Chapman helped to design in England for use in schools.
>> They use crossed carbide rods for hinges. I wound my own coils and hope 
>> to
>> have them up and recording within a year (being realistic here, as I have
>> been working on all three seismometers, on and off for almost a year
>> already). So I may be asking more questions!
>> Thanks in advance for any help. You can respond here or email me direct:
>> tdavisjb@............
>>
>>
>>
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