Round Pedestal Oak Dining Table

Round Pedestal Oak Dining Table. Approx 45" diameter. Top is constructed of small tongue and groove pieces similar to flooring. Inside of the pedestal is a gear mechanism that when turned approx 1/4 of a turn latches the pedestal together. There are 4 legs/feet extending from the pedestal and each has a wheel on the bottom. Top of the table was in horrendous condition--we think it was used outdoors as a plant stand. Top has been sanded, nothing else has been done to it. Curious about inside gear mechanism and origin.