Waterproof binoculars

Details Waterproof binoculars Waterproof binoculars

1982-01-22

1986-02-04

Punter, William H.

350589, G02B 2318, G02B 2300

Patent

active

045681554

ABSTRACT:
Waterproof binoculars of the central focus wheel-type having transfer bars coupled to focussing lens groups within the body tubes, with the transfer bars being simultaneously moved longitudinally by the co-action of a groove on each bar with a flange on a screw-threadingly mounted lead ring turned by a screw-threaded shaft. Each transfer bar is water-tightly sealed in its bore.

REFERENCES:
patent: 3985421 (1976-10-01), Beecher

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