Unidirectional correction arrangement for a time displaying devi

Details Unidirectional correction arrangement for a time displaying devi Unidirectional correction arrangement for a time displaying devi

1992-09-11

1994-04-12

Roskoski, Bernard

Horology: time measuring systems or devices

Regulating means

For setting

368190, G04B 1924

Patent

active

053032136

ABSTRACT:
This unidirectional correction arrangement (1) for a display device exhibiting a circular element (2) provided with teeth (3) includes a cylindrical element (4) around which is wrapped a helical spring (5), one of the ends of which serves as a finger (6) adapted to come into contact with a tooth (3). When the cylindrical element (4) is driven in rotation in a sense (A) for which the force (F1) exerted on the finger by the tooth is directed in a sense tending to wrap the spring around the cylindrical element and to tighten it therearound, the circular element (2) rotates. Such circular element (2) will not be driven when the cylindrical element (4) is driven so as to rotate in a sense (B) for which the force (F2) exerted on the finger by the tooth is directed in a sense tending to open the helical spring.

REFERENCES:
patent: 2633950 (1953-04-01), Phaneuf
patent: 3775965 (1973-12-01), Besson et al.
patent: 4320481 (1982-03-01), Hofert
patent: 4634287 (1987-01-01), Vuilleumier et al.

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