US 12,117,777 B2
Assembly for measuring the relative humidity level inside a watch case
Dominique Dubugnon, Saint-Prex (CH); Cedric Blatter, Commugny (CH); and Michel Willemin, Prêles (CH)
Assigned to The Swatch Group Research and Development Ltd, Marin (CH)
Filed by The Swatch Group Research and Development Ltd, Marin (CH)
Filed on Sep. 21, 2021, as Appl. No. 17/480,759.
Claims priority of application No. 20202331 (EP), filed on Oct. 16, 2020.
Prior Publication US 2022/0121157 A1, Apr. 21, 2022
Int. Cl. G04D 7/00 (2006.01); G04B 47/06 (2006.01); G01N 21/3554 (2014.01)
CPC G04D 7/004 (2013.01) [G04B 47/06 (2013.01); G04D 7/007 (2013.01); G01N 21/3554 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An assembly (1) for measuring a relative humidity level inside a watch (2), comprising said watch (2) and a determining device (4) for determining the humidity level present in an enclosure (9) of a case (3) of said watch (2), the determining device (4) comprising a free space optical system and a control unit (7), the free space optical system including:
an emitter module (5) for emitting at least one light beam (8);
a receiver module (6) for receiving said at least one light beam (8);
said control unit (7) being connected to said modules (5, 6) and said at least one light beam (8) emitted by the emitter module (5) defining an optical path partly comprised in said case (3) and extending as far as the receiver module (6) and the control unit (7) being configured to evaluate the absorption of said light beam (8) by water vapour present inside said enclosure (9) of the case (3),
wherein the case (3) comprises a crystal (15), a dial (17), a movement (18) and a back (16), comprising at least one passageway through which said at least one light beam passes (8).