Horology: time measuring systems or devices – Time interval – Mechanical stop time type
Reexamination Certificate
2000-09-11
2002-06-18
Miska, Vit (Department: 2859)
Horology: time measuring systems or devices
Time interval
Mechanical stop time type
C368S106000
Reexamination Certificate
active
06406176
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a chronograph time piece, particularly to a chronograph time piece for measuring “hour”, “minute” and “second” and displaying respective results of measurement by a chronograph hour hand, a chronograph minute hand and a chronograph second hand.
2. Background Information
In reference to
FIG. 32
, according to a conventional chronograph time piece, a barrel complete
110
rotates a front wheel train
312
. A mainspring (not illustrated) is arranged in the barrel complete
110
and constitutes a power source of the chronograph time piece. A barrel pinion
912
is attached to the barrel complete
110
via a barrel complete slip mechanism
910
. An hour counter intermediate wheel
914
is integrated to rotate by rotation of the barrel pinion
912
. An hour counting gear
916
is integrated to rotate by rotation of the hour counter intermediate wheel
914
. An hour counting wheel stem
920
is attached to the hour counting gear
916
via an hour counting slip mechanism
918
and by a chronograph hour hand
128
attached to the hour counting wheel stem
920
, there is displayed a result of measurement of an elapse time period of “hour” such as an elapse of 1 hour.
A second counting train wheel
316
is integrated to rotate by rotation of the front train wheel
312
. A second counting wheel stem
934
is connected to the second counting train wheel
316
via a second counting slip mechanism
932
. By a chronograph second hand
118
attached to the second counting wheel stem
934
, there is displayed a result of measurement of an elapse time period of “second” such as an elapse of 1 second.
A minute counting wheel train
940
is integrated to rotate by rotation of the second counting wheel train
316
. A minute counting wheel stem
944
is connected to the minute counting wheel train
940
via a minute counting slip mechanism
942
. By a chronograph minute hand
124
attached to the minute counting stem
944
, there is displayed a result of measurement of an elapse time period of “minute” such as an elapse of 1 minute. Transmission of rotation from the second counting wheel train
316
to the minute counting wheel train
322
is constituted to carry out via a pivoting wheel (not illustrated).
According to such a conventional chronograph time piece, the hour counting slip mechanism
918
, the second counting slip mechanism
932
and the minute counting slip mechanism
942
are constituted to include clutch springs. Further, by operating the clutch springs, operation of the counting wheel trains is constituted to control.
Further, according to the conventional chronograph time piece, in pushing a button for starting/stopping the chronograph time piece, there is used an operating lever operated by the button. Further, a line spring is used for positioning the operating lever and by bending a portion of the operating lever, the line spring is hooked to the bent portion.
In zeroing the chronograph hands by pushing a reset button, a hammer is operated by a plate spring.
Further, according to the conventional chronograph time piece, there is provided a cam subjected to operation of a yoke for controlling to start and stop operation and zeroing of the chronograph and the cam is constituted to control various functions of the chronograph.
For example, there is disclosed a constitution of a conventional chronograph in Japanese Patent Laid-Open No. 9463/1975 and Japanese Patent Laid-Open No. 9464/1975.
However, the conventional chronograph timepiece has the following problems:
(1) In integrating a chronograph time piece, a mechanism constituting the chronograph time piece must be adjusted finely.
(2) An hour counting slip mechanism, a second counting slip mechanism and a minute counting slip mechanism are constituted to include clutch springs and therefore, a number of parts constituting the counting mechanisms is large and structure of the time piece is complicated.
(3) Further, the mechanisms including the clutch springs are used and accordingly, a thickness of the time piece is thickened by a thickness of the springs.
In order to resolve such conventional problems, objects of the present invention reside in the following points.
(1) To provide a chronograph time piece capable of being integrated easily with no need of adjusting parts constituting counting mechanisms when integrating the chronograph time piece.
(2) To provide a chronograph time piece having a small number of parts constituting counting mechanisms.
(3) To provide a chronograph time piece in which counting mechanisms are operated with certainty.
(4) To realize a small-sized and thin chronograph time piece by thinly constituting counting train wheels.
SUMMARY OF THE INVENTION
In order to resolve the above-described problems, a chronograph time piece according to the invention is provided with a front train wheel rotating based on rotation of a barrel complete and a second counter intermediate wheel rotating based on rotation of the front wheel train. In a chronograph measurement mode, a second counting wheel rotates based on rotation of the second counter intermediate wheel and a chronograph second display member displays a result of measurement of an elapse time period of second. A minute counting train wheel rotates based on rotation of the second counting wheel and a chronograph minute display member displays a result of measurement of an elapse time period of minute.
The chronograph time piece according to the invention includes at least one hour counting train wheel provided to rotate based on rotation of the barrel complete in the chronograph measurement mode and a chronograph hour display member for displaying a result of measurement of an elapse time period of hour based on rotation of the hour counting train wheels.
By constituting in this way, a number of parts of the chronograph time piece can be reduced and the second counting wheel, the minute counting train wheel and the hour counting train wheel can be operated efficiently.
Further, it is preferable according to the chronograph time piece of the invention that the hour counting train wheels include an hour counting slip mechanism constituted such that one of train wheels constituting the hour counting train wheels can slip relative to other one thereof.
Further, the hour counting train wheels of the chronograph time piece according to the invention include a first hour counting train wheel rotating based on rotation of the barrel complete. It is preferable to include a second hour counting train wheel rotating based on rotation of the first hour counting train wheel in the chronograph measurement mode, and an hour counting slip mechanism constituted such that when chronograph measurement is not executed, rotation of the first hour counting train wheel is not transmitted to the second hour counting train wheel and in the chronograph measurement mode, the rotation of the first hour counting train wheel is transmitted to the second hour counting train wheel.
Further, it is preferable according to the chronograph time piece of the invention to include a center wheel & pinion provided to rotate based on the rotation of the barrel complete, a third wheel & pinion provided to rotate based on rotation of the center wheel & pinion, a second wheel provided to rotate based on rotation of the third wheel & pinion, a second display member rotating based on rotation of the second wheel for displaying second, a minute transmission pinion provided to rotate based on the rotation of the center wheel & pinion, a minute drive wheel provided to rotate based on rotation of the minute transmission pinion, a minute display member rotating based on rotation of the minute drive wheel for displaying minute, an hour wheel provided to rotate based on the rotation of the minute transmission pinion, and an hour display member rotating based on rotation of the hour wheel for displaying hour.
Further, according to the invention, there is provided a chronograph time piece characterized in that in a chronograph
Jujo Koichiro
Takahashi Takashi
Takizawa Katsuyoshi
Adams & Wilks
Miska Vit
Seiko Instruments Inc.
LandOfFree
Chronograph timepiece does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chronograph timepiece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chronograph timepiece will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2979364