Springs on brake drums

Please help settle an argument or start a new one. Myself and a couple of friends were debating the reasoning behind the spring that wraps around some brake drums on some cars in the late 50's-early 60's. These are non-finned type drums and the spring sits in a groove around the perimeter. One friend says it's for cooling (I'm skeptical) and myself and another friend can only think it may be there to absorb some vibration and help control brake shudder. We need the help from someone with far more technical knowledge than ourselves.........Thanks.

 

Vibration control. Same as the strap you put around it when you cut it (if you're doing it properly).

Cosmo

 

Keeps them quiet is the end and desired result and why it's there.

The spring dissipates the vibration and resonance of the "drum" canceling the most of the noise caused by those vibrations.

 

it serve as cooling and vibiration control-

 

My understanding has always been that it is for vibration. Similar to a hamonic balancer.




Sent via Illinois Bell Telephone Company's Car Radiotelephone

 

Thanks for the rapid responses guys. Sounds like the consensus is for vibration dampening primarily.