Detent escapement for timepiece

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

Reexamination Certificate

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Details

C368S131000

Reexamination Certificate

active

07097350

ABSTRACT:
The invention concerns a detent escapement for a timepiece including an escape wheel fitted with teeth, a balance onto whose staff there is secured at least one roller4including an impulse pallet-stone and in the circular periphery of which a notch is made, and a blocking member in the form of a lever hinged on a pin, said blocking member carrying means for locking the escape wheel, a control finger-piece and a follower ending in a beak arranged for cooperating with the notch of said roller, characterized in that said roller further includes a safety finger-piece arranged for cooperating with the teeth of the escape wheel and locking the latter when the impulse pallet-stone is accidentally unlocked from the toothing of the escape wheel.

REFERENCES:
patent: 474301 (1892-05-01), Pequegnat
patent: 1105062 (1914-07-01), Cochran
patent: 1359005 (1920-11-01), Verner
patent: 2362836 (1944-11-01), McCullough
patent: 3462942 (1969-08-01), Egger et al.
patent: 3538705 (1970-11-01), Perry
patent: 4122665 (1978-10-01), Giger
patent: 6301981 (2001-10-01), Oechslin
patent: 641/75 (1977-01-01), None
patent: 1 538 490 (2005-06-01), None
patent: 1 538 491 (2005-06-01), None
patent: 1 544 689 (2005-06-01), None
European Search Report completed Jan. 13, 2006 in corresponding application No. EP 05 00 6850.

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