"SASH CONTROLS" Crank Replacement

A quick learner from Indianapolis, Indiana says:
House built in 1970. Original small window cranks open/closed. It will not close completely due to stripped gear (see photos). Need to replace the arm with the gears/teeth on one end. The other arm says "SASH CONTROLS INC. DET. 14, MICH. PAT NO. 3,085,299" (See photo). Do you have a replacement arm (with gears/teeth)? Thanks.
Thumbnail of the uploaded file named Sash Control - Stripped Gear.jpg
Thumbnail of the uploaded file named Sash Control - Parts Info.jpg
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Tom from SWISCO responded:

I have seen that patent number only once before, and it was for a very, very old style operator that isn't made anymore. I don't know it for a fact since we have such limited information, but based on its design and age then I think it's safe to say that it's obsolete.

The only products we sell that might work are our 39-020 and 39-021 , along with a new 39-520 track, but this is an educated guess. I am personally not optimistic but some of my colleagues think it can be adapted, as long as you're handy. You may want to contact a local professional to do the job for you just in case.

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Anatomy of a casement window
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How to install a wood casement window crank
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