Speed indicating device

Details Speed indicating device Speed indicating device

1980-01-21

1981-10-20

Gill, James J.

Measuring and testing

Navigation

Ship's log

7386171, G01C 2110

Patent

active

042953677

ABSTRACT:
A speed indicating device disclosed includes a plate scaled with speed indicia mounted for pivotal movement about a generally vertical pivot at the front of the plate to enable the plate to aline with the direction of boat movement. A pointer is mounted for pivotal movement about a generally horizontal pivot at the rear of the plate. A drag assembly inclusive of a flexible line with a weight is suspended from the pointer causing the pointer to swing through an arc related to boat speed and the plate to aline with the direction of the boat as the weight is dragged by the boat via the water.

REFERENCES:
patent: 2707878 (1955-05-01), Cameron et al.
patent: 2749751 (1956-06-01), Hastings
patent: 3089335 (1963-05-01), Ebert

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