Two C-H double-throw switch versions [one set of movable blades versus two] are illustrated on page 26 of www.eatonelectrical.com/unsecure/cms1/TB00800001E.PDF {Aaak! 5MB file}
[Linked Image from 6l6.net]
Note also the two applications on page 24 fig. 8-7 — “two sources” versus “two loads”.
[Linked Image from 6l6.net]




[This message has been edited by Bjarney (edited 04-05-2004).]