Unit that comprises a winding ratchet that is attached to a...

Details Unit that comprises a winding ratchet that is attached to a... Unit that comprises a winding ratchet that is attached to a...

2009-11-20

2011-10-18

Miska, Vit (Department: 2833)

Horology: time measuring systems or devices

Mechanical time base

Mainspring

C368S206000

Reexamination Certificate

active

08038341

ABSTRACT:
A unit is formed by a winding ratchet (1) and a barrel arbor (4) having an end which includes a non-circular driving formation (5) and a groove (6) adjacent thereto that defines a small-section portion whose shape and dimensions are such that they extend into the section of the driving formation, whereby a shoulder (18) of the barrel arbor limits the height of the groove. The ratchet includes a central opening (2) corresponding to the driving formation and at least one off-centered tapping (3) relative to the ratchet. It includes an attachment washer (8) having a central passage (9) corresponding to the driving formation and engaged therewith in an assembled position, and at least one off-centered piercing (10), at least one screw for screwing the attachment washer onto the ratchet in a position angularly offset so that in this assembled position, the central opening is not aligned with the central passage.

REFERENCES:
patent: 424185 (1890-03-01), Donne
patent: 1339941 (1920-05-01), Borresen
patent: 2903844 (1959-09-01), Reymond
patent: 3119227 (1964-01-01), Stamm
patent: 3846974 (1974-11-01), Giger
patent: 3893290 (1975-07-01), Fluck et al.
patent: 3974639 (1976-08-01), Gilomen et al.

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