The early Ithaca Model 37's actually had a second sear that released the hammer when the bolt locked into battery.
The second sear only came into use when the trigger was held back and the gun was operated. More of a pumpfire and not a slamfire.
Note the Winchester Model 12 would do the same if the trigger was held back. I do not know of any other mfgr's that will do the pumpfire.