Detent escapement for a timepiece

Details Detent escapement for a timepiece Detent escapement for a timepiece

2006-05-09

2006-05-09

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Escapements

With oscillating or reciprocating means

C368S131000

Reexamination Certificate

active

07040803

ABSTRACT:
The blocking member (6) or detent member of the escapement carries a follower (20) which ends in a beak (21) which cooperates with a small roller (23) comprising a notch (22). When the locking pallet-stone (7) of the blocking member releases itself from the teeth of escapement wheel (2), the beak (21) penetrates in the notch (22). The return of the pallet-stone (7) in the locking position is caused by a rising flank (25) of said notch, said rising flank being inclined such that the beak (21) is forced to follow and climb over said flank when the small roller (23) rotates. The arrangement allows the escapement to resist to shocks and consequently to omit the return spring acting on the blocking member.

REFERENCES:
patent: 48726 (1865-07-01), Rothfelder
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: 3 299 (1891-08-01), None
patent: 64 175 D (1977-01-01), None
Huguenin, Guye and Gauchat, Echappements et Moteurs pas á pas, 1975, Fig 17-5.
European Search Report, completed Jul. 13, 2004.

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