I am currently restoring a United 1962 Tropics ball bowler which is complete apart from the coin & front locking plate mechanism. I am working through the coin mechanism by modifying a GTB coin mech bracket assembly & fabricating one side of the coin chute-that's ok.
But the locking mechanism is quite ingenious but seemingly very difficult to procure & I am starting to think just as difficult to fabricate. This is a pic of the locking mechanism (not easy to see) kindly provided to me by feveredpinhead:
and this is the overall retaining bracket showing the locking rod guides at the bottom:
The locking mechanism consists of a normal lock but the rear tab is replaced by a circular toothed gear. In turn there are two rods; each one on either side of the gear which have a series of spiral grooves creating teeth to mesh with the circular toothed gear. When the key is turned to lock one rod goes up to lock the top & the other rod goes down to lock the bottom. Unlock is a reverse of that process. The meshing of the circular gear tab with each rod is therefore key to the mechanism.
Has anyone come across such a mechanism beyond a United ball bowler which might broaden the ability to purchase the rods & the circular gear? Thanks.