Outboard motor with engine tachometer
First Claim
1. In an outboard motor comprising a power head containing an internal combustion engine surrounded by a protective cowling, an air gap formed in said power head between a portion of said internal combustion engine and said proective cowling, a drive shaft housing fixed beneath said power head and carrying marine propulsion means driven by said internal combustion engine, and electrical generating means driven by said engine for generating electrical output that varies with the speed of said internal combustion engine, the improvement comprising sensor means carried by said cowling in proximity to said electrical generating means for generating an electrical signal related to the electrical output of said electrical generating means, indicator means carried by said cowling and positioned to be viewed by an operator of said motor for providing a speed indication in response to an electrical signal, and means for transmitting a signal from said sensor means to said indicator means.
1 Assignment
0 Petitions
Accused Products
Abstract
Two embodiments of improved electric tachometers for outboard motors wherein the tachometer and its driving sensor are mounted on the protective cowling of the power head of the motor and the sensor derives an electrical signal through an air gap so that no mechanical connection is required between the engine and the tachometer.
12 Citations
11 Claims
- 1. In an outboard motor comprising a power head containing an internal combustion engine surrounded by a protective cowling, an air gap formed in said power head between a portion of said internal combustion engine and said proective cowling, a drive shaft housing fixed beneath said power head and carrying marine propulsion means driven by said internal combustion engine, and electrical generating means driven by said engine for generating electrical output that varies with the speed of said internal combustion engine, the improvement comprising sensor means carried by said cowling in proximity to said electrical generating means for generating an electrical signal related to the electrical output of said electrical generating means, indicator means carried by said cowling and positioned to be viewed by an operator of said motor for providing a speed indication in response to an electrical signal, and means for transmitting a signal from said sensor means to said indicator means.
Specification