Optical projection time-piece attachment for spectacles or combi

Details Optical projection time-piece attachment for spectacles or combi Optical projection time-piece attachment for spectacles or combi

1987-07-01

1988-06-14

Miska, Vit W.

Horology: time measuring systems or devices

Combined with disparate device

351158, G04B 4700, G02C 100

Patent

active

047516917

ABSTRACT:
A miniature time-piece attachment for use on spectacles or made as an integral component of a spectacles frame. The time-piece is of the electronic type displaying the time value as miniature light emitting numerical display when a miniature button is pressed. The time display is projected optically by a lens and clear transparent window arrangement such that the time display appears as a virtual image superimposed and projected at infinity on a side of the normal field of view of the spectacles wearer. When the display is not illuminated the normal field of view of the spectacles wearer is not impaired, or impaired as little as possible.

REFERENCES:
patent: 4274149 (1981-06-01), Flanagan
patent: 4526473 (1985-07-01), Zahn, III

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