C2 clocks how to power?

[Alan D.]

First I assume all c2 clocks where the same on the inside. I'm playing with a 65-67 clock.

There is a single connector on the rear which bring in 12V and ground.
The frame is the ground (thus most parts inside) while the 12V is connected directly to the relay coil.
A timing metal lever slowly moves towards the relay, evidently hitting the relay case arm thus grounding it.
Result is that the relay arm pushes that metal timing lever away from the relay, thus starting the timing again.


So confusion is - since the relay is active with the ground connected thru the relay case arm, what opens the circuit so relay
does not fry ?

[Alan D.]

Re: C2 clocks how to power?

Well no clock interests here?? So naturally could not leave alone, put back together and no running for past hour.
It would appear that when the Relay Case Arm pushes the Timing Metal Lever back via the relay being activated,
it springs back almost to metal post, why? Either another spring is under Timing Metal Lever or the dark part under
that area is a magnet and pulls the the lever back towards the metal post (in picture post is at "T" of "Timing metal lever"
Just in case somebody else wonders.

Wish I could take the knob off adjuster, but it's running - so I'll well enough alone.

[Gary C.]

Re: C2 clocks how to power?

Explanation of how old car clocks work
https://www.oldcarsweekly.com/featur...%20same%20time.

[Alan D.]

Re: C2 clocks how to power?

That's the stuff I needed. Great site that I did not have but do now.
Thanks Gary and so it's a spring.

[Mark L.]

Re: C2 clocks how to power?

Alan, can you put this in the Tech Articles file for future reference.

[Stephen L.]

Re: C2 clocks how to power?

As a footnote, disconnect the battery when the car is not used for extended periods to "save" the clock.
Reasoning:
The clock "rewinds" cycles the spring approximately every 2 minutes.
That is 30 times perhour x 24 = 720 per day x365 = 262800 per year.
This will prolong the "life" of the contacts immensely!!!!!