Relays

I don't see any photos.

The links came through OK for me, Hot.

Makes me wish I knew something about relays . . .

EdKing

These are reliable traditional "glass relays" which operated detection circuits and signals until the advent of solid state control, which is now the standard.  The glass case was to keep the contacts clean and free of any interference with movement by critters or debris.  The relays were often set on shelves, rather than being bolted to something in the relay cabinet.

They were designed to close when energized and to open by gravity when not energized.  This gravity feature was an advantage (simplicity) and also a disadvantage, as a Signal Maintainer could turn a relay onto its side to keep it closed during testing, and forget to upright it, resulting in a serious compromise to signal safety.

They are disappearing fast as railroads replace signal equipment with moving parts at a rapid rate.

Number 90 - Thanks for the info!  So these relays are still in service in some places?  What is the difference between the smaller relays and the larger one?

Tom B