Time-setting mechanism for clock movement with perpetual...

Details Time-setting mechanism for clock movement with perpetual... Time-setting mechanism for clock movement with perpetual...

1999-12-27

2001-09-25

Roskoski, Bernard (Department: 2859)

Horology: time measuring systems or devices

With calendar indicator

Movable ring or disk

C368S038000

Reexamination Certificate

active

06295250

ABSTRACT:

This invention concerns a mechanism for setting the hour, date, month and year of a perpetual date calendar movement, which includes at least devices for display of the hour, date, month and year. In particular, the invention concerns such a mechanism that allows rapid correction of the information on the displays mentioned above.
Perpetual date mechanisms of an exclusively mechanical type are generally associated with mechanical movements, and in particular with automatic timepiece movements whose operation stops either when they are not manually wound (simple mechanical movement), or when they are not carried by a user (automatic mechanical movement).
Thus, when watches containing such movements are sold, it is often necessary to correct information about time, that is, setting the hour, date, month and possibly the year, since sales are usually made after stocking the watches in a warehouse for several months after they are received from the factory or the wholesaler.
Currently, this correction activity is complicated and is difficult to understand both for the uninformed user and the seller. This type of difficulty often results in aborting the sale. This correction operation is done by means of the conventional time-setting stem and by a combination of correcting pushing devices, which are active only for a period of the day, each indication of the date having its correcting pushing device (date, months, years).
Thus, the goal of this invention is to remedy this disadvantage by supplying a time-setting mechanism for the date, month and year of a perpetual date movement, whose correction operations may be carried out simply and quickly, essentially by manipulation of the conventional time-setting stem.
To that end, the purpose of this invention is a mechanism for setting time in a perpetual date timepiece movement which includes a driving device for driving a date display including driving means that can advance that indicator by jumps once every 24 hours, this movement also including an adjusting device that allows this indicator to make adjusting steps to automatically take account of months with 28, 29 or 30 days, said device including a rotary cam which is moved at least one step every 24 hours, this cam having a profile suitable for operating a sensor, causing:
on the one hand, the oscillating movement of a mobile assembly with a pawl system to make the date display of the required additional adjusting step or steps advance, and
on the other hand, the advancement of this cam to make it carry out a number of steps equal to the number of the adjusting steps of this indicator in order to have it make one complete turn per year, characterized in that it comprises means for disengaging the sensor to disengage it from the profile of that cam, and means for coupling the indicator with that cam, said coupling means being operated by said disengaging means which are themselves controlled by a control stem.


REFERENCES:
patent: 3716983 (1973-02-01), Tanaka et al.
patent: 4026100 (1977-05-01), Kume et al.
patent: 6118734 (2000-09-01), Ray et al.

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