Detent escapement for timepiece

Horology: time measuring systems or devices – Escapements – With oscillating or reciprocating means

Reexamination Certificate

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Details

C368S129000

Reexamination Certificate

active

07458717

ABSTRACT:
An escapement for a timepiece movement includes a toothed escape wheel, a balance and a detent respectively pivoted on rotation axes. The detent supports a pallet lock that interacts with the first tooth of the escape wheel along a certain length of penetration in order to block it in an idle phase during which the balance executes a free arc of oscillation. An impulse pallet rotationally driven by the balance interacts with a second tooth when the detent is pivoted in order to release the escape wheel, this wheel turning by a forward pitch before being blocked again by the pallet lock by interaction with the second tooth. The escapement also includes a limiting plate, which is coaxial and rotationally secured to the balance, has a periphery including a substantially circular main portion and a cutout positioned facing the pallet lock in the release phase.

REFERENCES:
patent: 180290 (1876-07-01), Voigt
patent: 3505805 (1970-04-01), Brashear et al.
patent: 4002021 (1977-01-01), Dubois et al.
patent: 6301981 (2001-10-01), Oechslin
patent: 6712500 (2004-03-01), Tu et al.
patent: 6942378 (2005-09-01), Hayek et al.
patent: 7192180 (2007-03-01), Hayek et al.
patent: 2005/0122847 (2005-06-01), Hayek et al.
patent: 3299 (1891-03-01), None

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