That's very interesting... It makes sense though that the idea to put
eyelets in boards was probably from someone who used them in other products.
They put them in tarpaulins and clothing and in metal so why not in boards
as well.
I bet the high speed automation of eyelet installation in boards was pretty
much a disappointment when plated through hole technology came along..
It sounds like great material for a 'history of the eyelet or plated through
hole' article to me.
It might be a fun research project for someone.
I remember the name USECO, do you know what that acronym stood for?
I'm just curious. Probably something like 'U.S. Eyelet Co.' We said it like
a word, "you-see-co".
By the way JaMi, that means you're older than I am, by a bit... I didn't
graduate from High School until 1973, although I had been working with my
father making PC boards all through high school. I think that would have put
me in Junior High school when you were at Lear Siegler. (Still wet behind
the ears) Thanks for the insight, as always.
Bill Brooks
PCB Design Engineer , C.I.D., C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Tuesday, January 20, 2004 4:46 AM
To: [log in to unmask]
Subject: Re: [DC] Hole size for test points
Some of the earliest commercial insertion equipment was made by US Shoe
company, I think... Used to work at a place (big automotive electronics
co.) where the line had beaucoup heads, each inserting one component.
Pretty sure the makers of the assembly equip. also made lines for shoe
factories...
"Brooks,Bill"
<[log in to unmask]> To:
[log in to unmask]
Sent by: DesignerCouncil cc:
<[log in to unmask]> Subject: Re:
[DC] Hole size for test
points
01/19/2004 01:23 PM
Please respond to
"(Designers Council
Forum)"; Please respond to
"Brooks,Bill"
You used to put the eyelets into shoes for shoe strings?
Bill Brooks
PCB Design Engineer , C.I.D., C.I.I.
-----Original Message-----
From: JaMi Smith [mailto:[log in to unmask]]
Sent: Friday, January 16, 2004 12:10 PM
To: [log in to unmask]
Subject: Re: [DC] Hole size for test points
Jean-Francois and Bill,
Ok,
I've tried to follow the thread, but the one thing that I missed was
whether
the
hole size was for a plated thru hole or a non-plated thru hole.
Somehow I think that that the Manufactures Spec may have been for a
non-plated thru
hole.
It does make a difference.
Don't forget that if it is a plated thru hole, that you can't rely on a
connection
made to it on an inner layer, since there can be seperation of the wall
plating when
the hole is put in compression. It used to be that you were not allowed to
use
plating on any hole that would be put in compression for just this reason.
On a different note, Ah yes, eyelets.
I can remember when we at Cimron Division of Lear Siegler went to the very
first
Nepcon Show in 1968 in Long Beach California with our brand new Eyelet
Machine
designed exclusively for Printed Circuit Boards (as opposed to shoes
(USECO)), that
could be used to install .060 Funnel Flange Eyelets at a rate of up to 100
a
minute.
JaMi Smith
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