Hand-held trolling speedometer

Details Hand-held trolling speedometer Hand-held trolling speedometer

1977-03-04

1978-03-14

Woodiel, Donald O.

Measuring and testing

Navigation

Ship's log

G01C 2110

Patent

active

040784240

ABSTRACT:
A hand-held trolling speedometer or speed indicator for use by a person riding in a boat. The trolling speedometer includes a drogue, an indicator, and a flexible line interconnected between the drogue and a spring-biased marker in the indicator. The indicator includes a transparent column having a plurality of indicia which, in cooperation with the spring-biased marker, provides a visual indication of the resistance encountered by the drogue and, thereby, the speed of the boat. The drogue is fabricated as an open end container having a bottom with a plurality of enlarged apertures therein. A reducer cap is adapted to be removably mounted on the bottom of the drogue to selectively reduce the size of the apertures. The drogue also serves as a container for stowage of the flexible line and the indicator portion of the speedometer. A bail is affixed adjacent the open end of the container and serves as the attachment point for the flexible line.

REFERENCES:
patent: 168432 (1975-10-01), Trenchard
patent: 3681987 (1972-08-01), Ruskin

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