Device for rapid demonstration of the action of phototropic obje

Details Device for rapid demonstration of the action of phototropic obje Device for rapid demonstration of the action of phototropic obje

1983-05-05

1985-03-19

Skogquist, Harland S.

Education and demonstration

Means for demonstrating apparatus, product, or surface...

G09B 2500

Patent

active

045056838

ABSTRACT:
A device for rapidly demonstrating the darkening action of phototropic objects, particularly eyeglasses. The device has a housing or casing provided in its lower part (6) with a hollow space (7) which is placed over the objects to be demonstrated (8, 9) while such objects lie on any suitable horizontal supporting surface such as a table or desk. These objects are uniformly illuminated by a flash tube emitting light in the UV-A range and in the visible range. Upon each actuation of the circuit controlling the flash tube a plurality of flashes which succeed each other at a predetermined time interval is automatically given off.

REFERENCES:
patent: 2565079 (1951-08-01), Kern
patent: 3269267 (1966-08-01), Collins

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