Spring-barrel arrangement for a timepiece

Horology: time measuring systems or devices – Mechanical time base – Mainspring

Reexamination Certificate

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Details

C368S144000

Reexamination Certificate

active

07318669

ABSTRACT:
A spring-barrel arrangement for a timepiece includes a fixed plate-like component with a circular cutout. A spring barrel is rotatably mounted in said circular cutout by its corresponding circular outer contour. A barrel core is coaxially rotatably mounted relative to the spring barrel and is enclosed by a helical tension spring. An inner end of the spring is connected to the barrel core and its outer end connected to the spring barrel. A crown wheel with a toothed ring is fixed to the spring barrel and a first wheel of a wheel train of the timepiece is fixed to the barrel core. The circular cutout is formed through the plate-like component and the spring barrel has two supporting regions which extend radially beyond the diameter of the circular cutout and are each in abutment against one of the mutually opposite side surfaces of the plate-like component.

REFERENCES:
patent: 848976 (1907-04-01), Currie
patent: 861727 (1907-07-01), Hubscher
patent: 3294198 (1966-12-01), Pfeffer
patent: 3852954 (1974-12-01), Bachmann
patent: 3974639 (1976-08-01), Gilomen et al.
patent: 4363553 (1982-12-01), Thomi et al.
patent: 5119348 (1992-06-01), Mathys
patent: 29070 (1903-09-01), None
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patent: 319 631 (1957-02-01), None
patent: 521 623 (1971-12-01), None
patent: 3573 (1981-07-01), None
patent: 431 728 (1911-06-01), None
patent: 2 287 717 (1974-05-01), None

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