Telephone Rotary Dial Mechanism

The back side and innards of a rotary dial mechanism from a 1978 telephone. A clever arrangement of electric contacts and levers creates the "clicking" signals (pulse dialing) that go to the telephone exchange. Inside (not seen here) is a gear with a vertical spring that rotates the dial back to its original position, and the rotating axis with the brass extensions helps to control the rotation speed by creating more friction (in way of centrifugal force) as the speed gets higher.

[@silience4095]

Clever design! Nice!

[@idogendel]

Indeed, back when digital solutions were non-existent or too expensive, people developed amazingly clever mechanical stuff. There seems to be less and less of that around today.

[@NumaticVacuum]

A bit slow for a GPO dial.

[@idogendel]

Actually, I don't remember who made this telephone. I'll have to check if I still have it somewhere, but there's a good chance it's not British.

[@NumaticVacuum]

It has the identical innards but the finger wheel and number card cover looks different.

[@idogendel]

Beats me. Anyway this mechanism was stored for decades in less-than-optimal conditions, I wouldn't be surprised if it affected its springs and other moving parts.

[@xemnatakashimioudowitzscud8441]

how did i get here

[@idogendel]

+XemnaTakashimi OudowitzScudavichvinzki Probably clicked some links :-)

[@saskoilersfan]

Early hadron collider._. I'm alive and I try to contact the dead and fail. If i'm dead, it should be no problem contacting the liveing with all the dead geniuses here.