Horological instrument

Details Horological instrument Horological instrument

1975-05-30

1977-07-19

Schaefer, Robert K.

58 50R, G04B 1906

Patent

active

040360091

ABSTRACT:
A horological instrument is disclosed comprising a dial, an electrically energizable light source, gnomon means for casting a shadow on the dial, and means for imparting relative movement between the electrically energizable light source and the dial to move the shadow on the dial in indicating time.

REFERENCES:
patent: 2584087 (1952-01-01), Barbieri
patent: 3430433 (1969-03-01), Sandor
patent: 3439492 (1969-04-01), Gravenson
patent: 3829980 (1974-08-01), Iversen
patent: 3832842 (1974-09-01), Parker

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