Extra-thin watch movement

Details Extra-thin watch movement Extra-thin watch movement

1993-05-26

1994-01-11

Miska, Vit W.

Horology: time measuring systems or devices

Mechanical time base

Mainspring

368147, 368206, 368220, G04B 110, G04B 2300

Patent

active

052788075

ABSTRACT:
A manually or automatically wound extra-thin watch movement, comprising at least one barrel (3) and in which all the wheel sets are assembled in cantilever on one sole base plate (1) with the help of one ball bearing only (15 to 21). The ratchet (25) is in the form of a drum surrounding the barrel. It is swivelled by its periphery with the help of at least three rollers, each pivoted on a ball bearing, and the barrel (3) is pivoted within the ratchet by means of a ball bearing (23). This design enables reducing to a minimum the energy losses due to friction.

REFERENCES:
patent: 3852954 (1974-12-01), Bachmann
patent: 3952498 (1976-04-01), Saito et al.
patent: 4117664 (1978-10-01), Mathys
patent: 4132061 (1979-01-01), Mathys
patent: 4363553 (1982-12-01), Thomi et al.
patent: 5119348 (1992-06-01), Mathys

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