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OTC Tools (originally Owatonna Tool Company) is a tool and equipment manufacturer. It was founded in Owatonna, Minnesota , by Godfrey Kaplan, who operated a small machine shop there. Kaplan's son Rueben, invented the "Grip-O-Matic" universal gear puller and received his first patent. [ 1 ]
A spike puller can be seen on the right side of this image. A spike puller is a railroad maintenance of way machine designed to remove rail spikes from ties. [1] The spike puller automates the task of spike removal, allowing it to be done at a rate greater than can be achieved by hand.
For example, if an actor moves from 8 metres (26 ft) to 3 metres (9.8 ft) away from the focal plane, the focus puller changes the lens's distance setting in precise relation to the actor's changing position. The focus puller may also shift focus from one subject to another as the shot requires, a process called "rack focusing". [1]