macfixer01
Well-known member
Hi all,
I got these some time ago on Ebay, and was wondering if anybody knows anything about them? They seem to be made in April 1959 by the date codes, and came in cloth-backed copper bags that identify them as contacts. I don't doubt they cost the government good money back then, and would be even more expensive to make today. The items on the left are just solid. They have a knurled cap and a finely threaded section maybe 3/8 inch long, then the plain thick pin on the end.
The items on the right seem to have a red insulating resin of some sort in-between the inner and outer metal pieces. I thought they may be some sort of insulated feed-throughs? You can't see it that well in the photo but at the larger end the center piece has a hole surrounded by six radial slots, almost like a collet. It appears like it was meant to expand slightly when something was plugged into it then gripped whatever piece that was to make a solid connection. That end of the device is also finely threaded around the outside part. The opposite end has a solid pin and has two tiny holes next to the base of the pin for some reason? Don't know if it was for outgassing in case of failure, or for a special pin wrench applied there to install/remove them? Wrench holes doesn't seem likely though since they have hex sides and a deep well socket wrench would have likely worked better.
Any opinions?
Thanks,
macfixer01
I got these some time ago on Ebay, and was wondering if anybody knows anything about them? They seem to be made in April 1959 by the date codes, and came in cloth-backed copper bags that identify them as contacts. I don't doubt they cost the government good money back then, and would be even more expensive to make today. The items on the left are just solid. They have a knurled cap and a finely threaded section maybe 3/8 inch long, then the plain thick pin on the end.
The items on the right seem to have a red insulating resin of some sort in-between the inner and outer metal pieces. I thought they may be some sort of insulated feed-throughs? You can't see it that well in the photo but at the larger end the center piece has a hole surrounded by six radial slots, almost like a collet. It appears like it was meant to expand slightly when something was plugged into it then gripped whatever piece that was to make a solid connection. That end of the device is also finely threaded around the outside part. The opposite end has a solid pin and has two tiny holes next to the base of the pin for some reason? Don't know if it was for outgassing in case of failure, or for a special pin wrench applied there to install/remove them? Wrench holes doesn't seem likely though since they have hex sides and a deep well socket wrench would have likely worked better.
Any opinions?
Thanks,
macfixer01
