Patent ID: 8882551
Filing Date: 2014-11-11
Classification: B63H

Abstract:
1. A hydraulic marine jack plate, comprising a support member and a slide member for use with an outboard marine engine, which will allow vertical movement of the outboard marine engine in a plane which is parallel with a transom of a boat when said jack plate is attached to said transom, said support member being adapted to receive said slide member such that said slide member can move up and down in a plane which is approximately parallel with said transom, wherein said support member and said slide member are interconnected by a hydraulic cylinder which is in turn connected to a source of hydraulic power, wherein the improvement comprises: a position indicator for tracking the position of the slide member in relation to the support member, the position indicator including an electronic signal generator device having a transducer which is capable of being activated, a rectifier operatively coupled to the transducer for preventing reverse bias voltage damage to the transducer, the position indicator also having a magnet capable of actuating the transducer, wherein the transducer is attached to the hydraulic cylinders body and wherein the magnet is attached to said hydraulic cylinders ram and wherein an output signal of the transducer is sent to an L.E.D. visual indicator which is regulated, in relation to ambient light, by a photoelectric cell.