Re: 1947 Super Clipper ammeter
Posted by HH56 On 2011/10/24 13:03:12
Anything is possible. In these photos you can see the needle is fairly well supported but perhaps one of the plates sandwiching the needle has loosened.
Some other possibilities although all are just guesses without examination:
The tiny needle or point at a shaft end has broken or become gummed up where it enters it's support bearing.
A fleck of paint loosened or lint or dirt somehow wound up inside and is causing a problem. In the photos I marked the vulnerable spot and then moved the needle. You can see the iron vane attached to the needle is suspended only about a hair's width above the current plate--each side the same. It's hard to tell, but there may be a tiny hair like centering spring hidden but mostly all is done essentially by balance. If there is a spring, it might have broken but at the least, anything that manages to lodge in that space or spring area will prevent free movement.
The fiberboard or the ceramic supports the current plate is attached to has warped or broken and has thrown the front and back bearings out of alignment.
Somehow the movement has become magnetized.
Attach file:
(19.62 KB)
(29.40 KB)
Some other possibilities although all are just guesses without examination:
The tiny needle or point at a shaft end has broken or become gummed up where it enters it's support bearing.
A fleck of paint loosened or lint or dirt somehow wound up inside and is causing a problem. In the photos I marked the vulnerable spot and then moved the needle. You can see the iron vane attached to the needle is suspended only about a hair's width above the current plate--each side the same. It's hard to tell, but there may be a tiny hair like centering spring hidden but mostly all is done essentially by balance. If there is a spring, it might have broken but at the least, anything that manages to lodge in that space or spring area will prevent free movement.
The fiberboard or the ceramic supports the current plate is attached to has warped or broken and has thrown the front and back bearings out of alignment.
Somehow the movement has become magnetized.
Attach file:
(19.62 KB) (29.40 KB)
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