US 8,477,564 B2Granted

Timepiece with calendar mechanism including first date indicator and second date indicator

AssigneeSeiko Instruments Inc.

InventorShigeo Suzuki

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Abstract

A timepiece with a calendar mechanism has a first date indicator provided with numbers for indicating the ones place of a date, and a second date indicator provided with numbers for solely indicating the tens place of the date and numbers for singly indicating the one-digit date. The first date indicator has 12 calendar feeding teeth formed as inner teeth. The calendar feeding teeth comprise first to tenth calendar feeding teeth spaced apart angularly in a first direction, an eleventh calendar feeding tooth arranged at an angular interval in a second direction opposite to the first direction relative to the first calendar feeding tooth, and a twelfth calendar feeding tooth arranged at an angular interval in the first direction relative to the eleventh calendar feeding tooth. The second date indicator has at least one window portion for displaying the ones place using the numbers of the first date indicator.

Claims14

Dependent claims

A timepiece equipped with a calendar mechanism including two date indicators, the timepiece comprising:

a first date indicator configured to indicate a units place of a date;
a first date jumper for setting a position of the first date indicator in a rotation direction;
a second date indicator configured to indicate a tens place of the date and to singly indicate a one-digit date;
and
a second date jumper for setting a position of the second date indicator in a rotation direction;
wherein the first date indicator has a first date character display surface provided with a set of numbers including “0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8” and “9” for indicating the units place of the date;
wherein the first date indicator has 31 first date indicator tooth portions formed as inner teeth at an angular interval of (360/31) degrees and 12 calendar feeding teeth formed as inner teeth, the 12 calendar feeding teeth comprising first to tenth calendar feeding teeth arranged in a first direction at an angular interval of (360/31) degrees, an eleventh calendar feeding tooth arranged at an angular interval of (360*10/31) degrees in a second direction opposite to the first direction relative to the first calendar feeding tooth, and a twelfth calendar feeding tooth arranged at an angular interval of (360*10/31) degrees in the first direction relative to the eleventh calendar feeding tooth;
wherein the second date indicator has a second date character display surface provided with numbers for singly displaying the one-digit date, and numbers for displaying solely the tens place of the date;
wherein the second date indicator has at least one window portion for displaying the units place of the date using the numbers provided on the first date character display surface of the first date indicator;
and
wherein the second date character display surface of the first date indicator is arranged at a position closer to a dial than the first date character display surface of the second date indicator.

8 more elements

A timepiece equipped with a calendar mechanism, the timepiece comprising:

a first date indicator for displaying a units place of a date, the first date indicator comprising a display surface provided with a plurality of sequences of numbers spaced apart angularly and comprising a first sequence of numbers which are ordered by increasing value from 0 to 9, a second sequence of numbers following the first sequence and which are ordered by increasing value from 0 to 9, and a third sequence of numbers following the second sequence and which are ordered by increasing value from 0 to 1;
31 first date indicator tooth portions formed as inner teeth arranged circularly and spaced apart angularly;
and 12 calendar feeding teeth formed as inner teeth, the calendar feeding teeth comprising first to tenth calendar feeding teeth spaced apart angularly in a first direction, an eleventh calendar feeding tooth arranged at an angular interval in a second direction opposite to the first direction relative to the first calendar feeding tooth, and a twelfth calendar feeding tooth arranged at an angular interval in the first direction relative to the eleventh calendar feeding tooth;
a first date jumper for setting a position of the first date indicator in a rotation direction;
a second date indicator disposed in superimposed and concentric relationship relative to the first date indicator for displaying a tens place of the date and for singly displaying a one-digit date, the second date indicator comprising a display surface provided with a plurality of sequences of numbers spaced apart angularly and comprising a first sequence of numbers which are ordered by increasing value from 1 to 9 for singly displaying the one-digit date, and a second sequence of numbers following the first sequence of numbers and which are ordered by increasing value from 1 to 3 for solely displaying the tens place of the date;
and at least one window portion for selectively displaying the units place of the date using a number from the sequence of numbers of first date indicator;
and
a second date jumper for setting a position of the second date indicator in a rotation direction.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/928,575Filed 14 Dec 2010
Priority: JP 2009-29316124 Dec 2009
Published: US 2011/0158052 A130 Jun 2011
Granted: 2 Jul 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G04B 19/247
Characterised by the shape of the date indicator: disc-shaped
G04C 3/143
Incorporating a stepping motor: means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of…
G04C 17/0066
With date indication: electromagnetically driven, e.g. intermittently
G04B
Mechanically-driven clocks or watches