Stop-watch wristwatch

Details Stop-watch wristwatch Stop-watch wristwatch

1990-07-03

1991-12-31

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368110, 368113, 368281, 368223, 368228, G04F 700, G04B 1900

Patent

active

050777084

ABSTRACT:
The minute summer is used as a counting-down device and comprises a rotating disk sector (11) revealing a contrasted dial sector preceding the zero of the graduated scale, at the start of counting-down, and equipped with cut-out (15). This cut-out reveals a second sector (14) of contrasted appearance at the moment when the front edge (19) of the first sector reaches a graduation mark close to zero, for example the final minute, so as to inform the wearer that the final minute has started. Particularly intended for yachting.

REFERENCES:
patent: 2300950 (1942-11-01), Lux
patent: 2783835 (1957-03-01), Poole
patent: 3077729 (1963-02-01), Schlenker

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