We just bought a ranch-style home built in 1965, and the windows need some love — in the whole house, there is only one window with a semi-functioning sash balance. They have some kind of spring-based balancing system, but in all my looking, I haven't seen anything quite like them.
It looks like they're just tension springs that somehow clip into the sides of the sash and run up to... somewhere... in the frame. It looks like there's some kind of clip or something that fastens to the sides of the sash, and that's come detached (or broken, I can't tell) on most of the windows. I don't think there's any cable like I'd expect to see in a block-and-tackle balance, and the channel balances I've seen on the internet look different. Pictures (as best as I can get them) below.
So! A few questions:
- Does this setup look familiar? What's it called?
- Can I find replacement parts?
- How can I get this apart to start making it better?