Sealed electronic digital switching structure

Claim 1

A DIGITAL SWITCHING UNIT INCLUDING MEANS DEFINING A SEALED ELECTRIC PARTS CHAMBER, RELATIVELY FIXED FIRST CONTACT MEANS MOUNTED IN SAID SEALED CHAMBER, RELATIVELY MOVABLE SECOND CONTACT MEANS MOUNTED IN SAID SEALED CHAMBER IN COOPERATIVE RELATION WITH SAID RELATIVELY FIXED FIRST CONTACT MEANS FOR MAKING AND BREAKING CIRCUITS, AT LEAST ONE OF SAID FIRST AND SECOND CONTACT MEANS INCLUDING RESILIENT CONTACT MEANS MAINTAINED IN COMPRESSION DURING SAID CIRCUIT MAKING AND BREAKING, A ROTARY SWITCHING WHEEL HAVING FINGER ENGAGING MEANS TO ROTATE THE WHEEL, MEANS DEFINING AN UNSEALED SPACE ADJOINING SAID SEALED CHAMBER, ROTATABLE SHAFT MEANS JOURNALED IN A PARTITION WALL OF SAID SEALED CHAMBER, SAID PARTITION WALL BEING LOCATED BETWEEN SAID SEALED CHAMBER AND SAID UNSEALED SPACE, SAID WHEEL HAVING A DRUM CONCENTRIC WITH SAID SHAFT MEANS AND CARRYING INDICIA ON THE OUTER FACE THEREOF THAT IS CONCENTRIC WITH SAID SHAFT MEANS, SAID UNSEALED SPACE CONTAINING SAID ROTARY SWITCHING WHEEL AND BEING PARTIALLY DEFINED BY WALL MEANS PROVIDING AN APERTURE THROUGH WHICH SAID FINGER ENGAGING MEANS PROJECT AND ALSO PROVIDING A WINDOW FOR VIEWING A SELECTED INDICIUM IN A RADIAL DIRECTION RELATIVE TO SAID SHAFT MEANS, ONE END OF SAID SHAFT MEANS BEING COUPLED TO SAID RELATIVELY MOVABLE SECOND CONTACT MEANS FOR DRIVING SAID SECOND CONTACT MEANS IN SAID SEALED CHAMBER WITH RESPECT TO SAID RELATIVELY FIXED FIRST CONTACT MEANS IN SAID SEALED CHAMBER, SAID SWITCHING WHEEL BEING MOUNTED IN SAID UNSEALED SPACE ADJACENT SAID PARTITION WALL AND BEING ATTACHED TO A PORTION OF SAID SHAFT MEANS PROTRUDING INTO SAID UNSEALED SPACE FOR DRIVING SAID SHAFT MEANS AND THEREBY SAID MOVABLE CONTACT MEANS, AND SEAL MEANS COMPRESSED ABOUT SAID SHAFT MEANS AND IN ENGAGEMENT WITH THE SAID PARTITION WALL FOR SEALING SAID SEALED CHAMBER IN THE REGION OF SAID SHAFT MEANS JOURNAL.