Horology: time measuring systems or devices – Time interval – Mechanical stop time type
Reexamination Certificate
2000-10-10
2002-08-06
Roskoski, Bernard (Department: 2841)
Horology: time measuring systems or devices
Time interval
Mechanical stop time type
Reexamination Certificate
active
06428201
ABSTRACT:
BACKGROUND OF THE INVENTION
2. 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.
Further, the invention relates to a lever apparatus for a time piece, particularly to a lever apparatus suitable for executing start/stop operation and reset operation of a chronograph time piece.
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 time piece suffers from the following problems.
(1) The hour counting slip mechanism, the second counting slip mechanism and the minute counting slip mechanism are constituted to include the clutch springs and accordingly, a number of parts constituting the counting mechanisms is large and the structure of the time piece is complicated.
(2) It is difficult to position and integrate the operating lever operated by the start/stop button for starting/stopping the chronograph time piece when the start/stop button is pushed. Particularly, the line spring is used for positioning the operating lever and accordingly, it is difficult to adjust a degree of bending the line spring.
(3) According to the chronograph time piece in which an operational amount of the hammer is large, an amount of bending a spring for operating the hammer must be increased. Therefore, it is necessary that the spring for operating the hammer is large and long and a size of the movement needs to be large.
In order to resolve such conventional problems, the following are objects according to the invention.
(1) To provide a chronograph time piece in which a mechanism constituting the chronograph time piece needs not to adjust when integrating the chronograph time piece.
(2) To provide a small-sized chronograph time piece using a lever having excellent spring characteristic without using the clutch spring.
(3) To provide a lever apparatus for a time piece capable of operating a plurality of levers with certainty.
SUMMARY OF THE INVENTION
In order to resolve the above-described problems, according to an aspect of the invention, there is provided a chronograph time piece comprising a front train wheel rotating based on rotation of a barrel complete, a second counting wheel constituted to rotate based on rotation of the front train wheel in a chronograph measurement mode, a chronograph second display member for displaying a result of measurement of an elapse time period of second based on rotation of the second counting wheel in the chronograph measurement mode, and a coupling lever for preventing the rotation of the front train wheel from being transmitted to the second counting wheel in a mode in which the chronograph measurement is not executed and transmitting the rotation of the front train wheel to the second counting wheel in the chronograph measurement mode.
Further, according to another aspect of the invention, there is provided a chronograph time piece comprising a front train wheel rotating based on rotation of the barrel complete, a second counter intermediate wheel rotating based on rotation of the front train wheel, a chronograph second display member for displaying a result of measurement of an elapse time period of second based on rotation of the second chronograph wheel, a second counting wheel rotating based on rotation of the second counter intermediate wheel in a chronograph measurement mode, the chronograph second display member for displaying the result of measurement of the elapse time period of second based on the rotation of the second counting wheel, and a coupling lever for preventing the rotation of the second counter intermediate wheel from being transmitted to the second counting wheel in a mode in which chronograph measurement is not executed and transmitting the rotation of the second counter intermediate wheel to the second counting wheel in the chronograph measurement mode.
Further, according to another aspect of the invention, it is preferable to provide the chronograph time piece comprising a minute counting train wheel provided to rotate based on rotation of the second counting wheel, and a chronograph minute display member for displaying a result of measurement of an elapse time period of minute based on rotation of the minute counting train wheel.
Further, according to another aspect of the invention, it is preferable to provide the chronograph time piece comprising at least one hour counting train wheel provided to rotate based on the 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 wheel.
Further, according to another aspect of the invention, there is provided the chronograph time piece comprising a center whe
Shibuya Norio
Takahashi Takashi
Watanabe Mamoru
Adams & Wilks
Roskoski Bernard
Seiko Instruments Inc.
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