U.S. patent number 3,645,090 [Application Number 05/047,701] was granted by the patent office on 1972-02-29 for day-date quick-adjuster for calender timepiece.
This patent grant is currently assigned to Citizen Watch Co., Ltd.. Invention is credited to Yoshifumi Mochizuki, Akira Tsuzuki.
United States Patent |
3,645,090 |
Mochizuki , et al. |
February 29, 1972 |
DAY-DATE QUICK-ADJUSTER FOR CALENDER TIMEPIECE
Abstract
The calendar correction mechanism for use with a calendar
timepiece having a date and a day calendar dial operable
independently from each other is operable by the manually rotatable
winding stem. The correction torque transmitting arrangement is so
designed that by turning said stem in one direction both calendar
dials are rotated for correction in unison with each other and by
turning the stem in the opposite direction only one of the dials is
rotated independently from the other and in the same direction as
before when the stem was rotated in said one direction.
Inventors: |
Mochizuki; Yoshifumi (Tokyo,
JA), Tsuzuki; Akira (Tokyo, JA) |
Assignee: |
Citizen Watch Co., Ltd. (Tokyo,
JA)
|
Family
ID: |
26388715 |
Appl.
No.: |
05/047,701 |
Filed: |
June 19, 1970 |
Foreign Application Priority Data
|
|
|
|
|
Jun 19, 1969 [JA] |
|
|
44/48443 |
Jun 19, 1969 [JA] |
|
|
44/58167 |
|
Current U.S.
Class: |
368/32; 968/83;
968/172 |
Current CPC
Class: |
G04B
11/006 (20130101); G04B 19/25 (20130101) |
Current International
Class: |
G04B
11/00 (20060101); G04B 19/00 (20060101); G04B
19/25 (20060101); G04b 019/24 () |
Field of
Search: |
;58/4,5,58 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wilkinson; Richard B.
Assistant Examiner: Miller, Jr.; George H.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are as follows:
1. In a calendar timepiece comprising a rotatable date calendar
ring, a rotatable day calendar ring, a rotatable winding stem and
setting means operatively connected between said rings and said
stem for imparting a correcting rotation to both of said rings
simultaneously upon rotating said stem in one direction and for
imparting a correcting rotation to only one of said rings by
rotating said stem in the opposite direction, said setting means
comprises first and second date indexing means for indexing the
date calendar ring and day indexing means for indexing the day
calendar ring, a first transmission means for coupling the winding
stem to the first date indexing means and the day indexing means
upon rotation of said stem in the said one direction and a second
transmission means for coupling the winding stem to the second date
indexing means upon rotation of said winding stem in the said
opposite direction.
2. A calendar timepiece as claimed in claim 1 wherein each of the
transmission means includes a common gear operatively coupled to
the winding stem during calendar ring setting and arranged for
selective meshing with another gear of one of said first and second
transmission means in dependence on the direction of rotation of
the winding stem.
3. In a calendar timepiece comprising a rotatable date calendar
ring, a rotatable day calendar ring, a rotatable winding stem and
setting means operatively connected between said rings and said
stem for imparting a correcting rotation to both of said rings
simultaneously upon rotating said stem in one direction and for
imparting a correcting rotation to only one of said rings by
rotating said stem in the opposite direction, said setting means
comprises a day indexing means for indexing the day calendar and a
date indexing means being coupled to first and second gears
respectively and a third gear arranged to be coupled to the winding
stem during the calendar ring setting.
4. A calendar timepiece as claimed in claim 3 wherein the setting
means comprises fourth and fifth meshing gears mounted on a common
rotatable support, said fourth gear disposed in mesh with the third
gear so that upon turning of the winding stem in the said one
direction the support is rotated to a position in which the fourth
gear meshes with the second and third gears and the fifth gear
meshes with the first gear and upon turning of the winding stem in
the said opposite direction the support is rotated to a position in
which the fourth gear meshes with the third gear and the fifth gear
meshes with the second gear.
5. A calendar timepiece as claimed in claim 3 wherein the third
gear meshes with the first gear and the setting means comprises a
fourth gear mounted on a support rotatable about the axis of the
first gear and which is disposed in mesh with the first gear, said
fourth gear arranged to be coupled to the second gear only during
turning of the winding stem in the said one direction during
calendar ring resetting.
6. A calendar timepiece as claimed in claim 3 wherein the third
gear is brought into mesh with the first and second gears during
calendar ring resetting and wherein one of the indexing means is
coupled to its associated gear of the first and second gears
through a one-way clutch.
7. A calendar timepiece as claimed in claim 3 wherein the day and
date indexing means are coupled to said first and second gears
respectively by means of a one-way clutch.
8. A calendar timepiece as claimed in claim 7 wherein the setting
means comprises a sun gear in mesh with said third gear and first
and second planet gears in mesh with the sun gear and mounted on a
support rotatable about the axis of the sun gear, said first and
second planet gear being selectively brought into mesh with the
first and second gears in dependence on the direction of turning of
the winding stem during calendar ring setting.
9. A calendar timepiece as claimed in claim 7 wherein the third
gear is brought into mesh with the first gear during calendar ring
resetting.
Description
The present invention relates broadly with improvement in and
relating to calendar timepieces. More specifically, it relates to a
quick-calendar correction mechanism for use with the timepiece of
the above kind having a date calendar dial and a day calendar dial
operable independently from each other.
One of recently advanced day and date calendar correction
mechanisms is constructed so that by turning the conventional
winding stem in one direction upon preparatory positioning thereof
in its quick calendar correcting position, either of the both
calendar displays is subjected correction and by turning the stem
in the reverse direction the remaining calendar display is
corrected.
If the timepiece movement should stop its motion for several days,
the winding stem must be rotated for performing one kind of
calendar correction at first in one direction and then in the
opposite direction for performing the remaining kind of calendar
correction. Therefore, with use of the prior advanced correction
mechanism, two successive operations must be adopted for carrying
out the day and date calendar corrections.
It is therefore an object of the present invention to provide a
further improved quick calendar correction mechanism, adapted for
performing simultaneously the both day and date calendar
corrections.
A still further object of the invention is to provide a calendar
correction mechanism of the above kind, capable of providing the
ability to correct the day calendar display in the reverse
direction for attaining an easier and quicker day correction at the
end of a small month.
These and other objects, features and advantages of the invention
will become more apparent when read the following detailed
description by reference to the accompanying drawings illustrative
of several preferred embodiments of the invention.
In the drawings:
FIG. 1 is a schematic plan view of a preferred first embodiment of
the invention.
FIG. 2 is a sectional view taken substantially along a section line
A-A' shown in FIG. 1.
FIG. 3 is a sectional view taken substantially along a section line
B-B' shown in FIG. 1.
FIGS. 4 and 5 are plan views of several main working parts of
preferred second and third embodiments of the invention,
respectively.
FIG. 6 is a sectional view taken substantially along a section line
C-C' shown in FIG. 5.
FIG. 7 is a schematic plan view of a fourth embodiment of the
invention.
FIG. 8 is a sectional view taken substantially along a section line
D-D' in FIG. 7.
FIGS. 9 and 10 are schematic plan views of two different working
modes of a preferred embodiment of the invention.
FIG. 11 is a similar view to FIG. 9, illustrative of the time
setting position of the fifth embodiment.
FIGS. 12 and 13 are plan views of a sixth embodiment of the
invention, illustrative of different operating positions of the
mechanism.
Referring now to FIGS. 1-3, illustrating the first embodiment, the
numeral 10 represents a conventional plate of a timepiece movement
and a conventional winding stem 11 is rotatably and slidably
mounted in the plate. The stem 11 is formed with a ring groove 11a
with which a projection 12a of a setting lever 12 is kept in
engagement as conventionally for the prevention of otherwise
possible slip-out of the stem from position.
Winding stem 11 carries a winding pinion 13 and a clutch wheel 14
having a gear portion 14a made integral therewith, as
conventionally.
Winding position 13 is slidable in the axial direction of the stem
11 and rotatable relative thereto, while clutch wheel 14 is
arranged only slidable longitudinally of the stem, thus being
rotatable in unison with the latter.
Clutch wheel 14 is formed on its cylindrical peripheral surface
with a ring groove 14b with which one end of clutch lever 15 is
engaged, the latter lever being movable in unison with the push-in
and drawout manual operation applied to the winding stem 11 by
receiving motion therefrom through the setting lever 12.
In the position shown in FIG. 1, clutch wheel 14 having a tooth
portion 14c being kept in its disengaged position with the tooth
portion at 13a formed on the winding pinion 13. At this stage,
setting wheel 16 mounted rotatably on a stationary shaft portion
10a formed on the plate 10 is kept again in its disengaged
position, as shown, with the toothed portion at 14a of clutch wheel
14. At this stage, further, the clutch wheel 14 is so positioned,
as shown, in a stabilized way that its toothed portion 14a is
positively kept in engagement with a gear 18a which is rigid with a
shaft 19 rotatably mounted in a lever 17.
When the winding stem 11 is pushed in rightwards in FIG. 2 from the
position shown therein, the clutch lever 15 is moved leftwards
relatively, thus the toothed portion 13a on winding pinion 13 is
brought into engagement with the toothed portion 14c of clutch
wheel 14, while the engagement between the toothed portion 14a with
the gear 18 is released ready for spring winding.
Conversely, when the winding stem 11 is drawn out leftwards in FIG.
2 from the position shown, clutch lever 15 is moved rightwards
relatively and the toothed portion 14d on winding pinion 14 is
brought into engagement with the setting wheel 16. As seen from
FIG. 1, this position is ready for the timesetting operation
wherein motion is transmitted from the winding stem through a
conventional minute wheel 24.
Since the lever 17 can move more than that which is performed by
the winding pinion 14 in the right-hand direction in FIG. 2 in this
stage, the engagement of the toothed portion 14a on winding pinion
with the gear 18a is released. The gear 18 rigid with gear 18a
fixedly mounted on the shaft 19 will act as the prime mover wheel
for the mechanism to be described, as will be more fully described
hereinafter.
Now turning back to FIG. 1, illustrative of the mechanism according
to this invention in a specific way, setting lever 12 is rotatably
mounted around a shaft 20 which is rigid with the plate 10, and
clutch lever 15 is rotatably mounted on its shaft 21 which is also
rigid with the plate. A conventional clutch lever spring 22 urges
the clutch lever 15 so as to establish a pressure contact thereof
with setting lever 12. Numeral 23 represents a conventional setting
lever spring the main nonelastic part of which is fixed onto the
plate 10 by means of setting screws 23a and 23b.
Setting lever spring 23 comprises an elastic arm 23c which is kept
in pressure contact with setting lever pin 12b. Setting lever
spring 23 is formed with an elastic arm 23d which exerts a
resilient pressure upon the setting lever 12 for keeping the latter
in position within the timepiece movement.
Setting wheel 16 is kept in meshing with minute wheel 24.
The lever 17 is rotatably mounted on a shaft 25 which is rigid with
the plate 10, said lever 17 being abutting under pressure against
the setting lever pin 12b under the influence of a bar spring 26
which is shown only partially for simplicity of the drawing.
Although not shown, this bar spring 26 is mounted at its root
portion fixedly on the plate 10.
The aforementioned relative arrangement of setting lever 12, clutch
lever 15, clutch lever spring 22 and winding stem 11 is
substantially known per se for the two position setting mechanism
for the timepiece movement.
Since the lever 17 is kept in a positive pressure engagement with
the setting lever 12b and movable in the counter clockwise
direction in FIG. 1 irrespective of occasional and selective moving
direction of the lever 12 caused by a push-in or drawout operation
applied to the winding stem, indeed, by the intimate and positive
cooperating engagement of cam parts 17a; 17b of the setting lever
pin 17b. On the lever 17, a gear 28 is rotatably mounted around a
shaft 27 which is rigid with the lever, said gear 28 meshing with
said gear 18. On the same lever 17, there is a further gear 29
which is rotatable around a shaft 25 rigid with the said lever. A
further lever 30 is also mounted rotatable on the same shaft 25, a
further shaft 31 being fixedly mounted on the said lever 30 and a
further gear 32 being rotatably mounted on the shaft 31 and meshing
with gear 29.
When gear 29 rotates in clockwise direction in FIG. 1, lever 30 is
subjected to a mechanical urging force acting in clockwise
direction and gear 32 is brought into meshing with gear 34 which is
rotatably mounted on the shaft at 33.
As shown in FIG. 3, gear 34 meshes at its ratchet tooth portion 34a
with that shown at 35a of gear 35 which is rotatably mounted on the
shaft 33. These ratchet tooth portions are so designed and arranged
that when gear is rotated in clockwise direction, rotation is
transmitted therefrom to gear 35 which is kept in meshing with a
day star wheel 36, the latter being controlled in its movement by a
jumper lever 44 as is known per se.
Gear 34 meshes gear 38 which is rotatably mounted on a shaft 37.
Gear 39 is rotatably mounted on the same shaft 37 and so designed
and arranged that when gear 38 rotates in counter clockwise
direction, rotation is transmitted to gear 39 through the
intermeshing between ratchet tooth portions 38a and 39a. Gear 39 is
kept in meshing with date display ring 40.
With the arrangement so far shown and described and with a
clockwise rotation of gear 29, gear 32 is brought into meshing with
gear 34, motion being thus transmitted through gear 35 to the day
star wheel 36 for performing the desired correction of the day
display.
At the same time, rotation is transmitted from gear 34 through
gears 38 and 39 to the date display ring 40 for the correction of
display. Although not shown, the date ring 40 is controlled by a
conventional jumper means.
It will be clear from the foregoing that with rotation of gear 29
in clockwise direction, both the day display and the date display
are subjected to correction.
With counter clockwise rotation of gear 29, gear 32 is shifted to a
position shown at 32a so as to mesh with gear 42. Gear 42 is
rotatably mounted on the shaft 41 and a gear 43 is positioned on
the gear 42 and rotatably mounted concentrically therewith. As seen
these related parts are so designed and arranged that only with
counter clockwise rotation of gear 42, the correction force can be
transmitted to date ring 40. The configuration and arrangement of
the ratchet means are selected for satisfying these
requirements.
With counter clockwise rotation of gear 29, gear 32 is shifted to a
position shown at 32a and the correction force is transmitted
through gears 42 and 43 to date ring 40.
With either rotational direction of gear 29, date ring 40 is turned
in its regular or forward direction and when a drive power is
transmitted from the power spring or the like source to both the
date ring and the day ring, gears 43, 35 and 39 are rotated in idle
and rotation can not be transmitted to any other means not related
therewith, thanks to the design and arrangement of the related
ratchet means.
Next, referring to FIG. 4, the second embodiment will be described
in detail. Since, in the present embodiment, the design and
function of the working parts arranged in advance of the gear 29
rotatably mounted on the shaft 25 are substantially similar to
those shown and described with reference to the foregoing first
embodiment, detailed description thereof may be omitted without
injury to better understanding of the present second
embodiment.
With counter clockwise rotation of gear 29, a gear 45 rotatably
mounted on a shaft 46 made rigid with an arm 57 which is pivotably
mounted on a shaft 47 is brought into meshing engagement not only
with gear 29, but also with gear 53.
Said gear 53 is rotatably mounted on shaft 54 upon which a gear 55
is concentrically mounted with gear 53. This partial gear train is
so designed and arranged, as will be seen from FIG. 4, drive force
is transmitted when the gear 53 is rotated in counter clockwise
direction. Gear 45 is further kept in meshing with a gear 49 which
is rotatably mounted on a shaft 48 made rigid with arm 57. Arm 57
is kept in contact with a stop means which is rigid with the plate
of the timepiece movement, although not shown.
Gear 50 is rotatably mounted on a shaft 52 and made with a gear 51
meshing with the day star wheel 36 controlled by a jumper lever 44
as conventionally.
With rotation of gear 29 in counter clockwise direction, motion
will be thus transmitted through gears 45, 53 and 55 to date ring
40 and, through gears 45, 49, 50 and 51 to day star wheel 36, for
the correction of day- and date dials.
With clockwise rotation of gear 29 and on account of that gears 29
and 45 have deeper dedendums, respectively, gear 45 is brought to a
position shown at 45a, and gear 49 to a position shown at 49a.
Thus, rotation is transmitted from gear 29 through gears at 45, 49,
53 and 55 to date ring 40 which is thus subjected to a correction
as in the former way. Day ring is not affected in this case.
Next, when a drive force is transmitted from the power spring or
the like source to rotate the day star wheel, gears 51 and 49 are
also brought into rotation, but, the gear 49 is receded to the
position at 49a so that no mechanical interference may be invited.
Even with rotational movement of the date ring, a slip may be
invited through the ratchet means provided between the related
gears 55 and 53.
Referring further to FIGS. 5 and 6, the third embodiment of the
invention will now be described.
The upstream working parts in advance of gear 29 when seen in the
transmitting direction of the calendar correcting force are
substantially same as before and a detailed description thereof
will be omitted herein.
With clockwise rotation of gear 29, motion is transmitted therefrom
to a gear 58 which is rotatably mounted on a shaft 59 and provided
on an arm 60 which is pivotable on the same shaft 59 rigid with the
plate.
Shafts 61 and 62 are made rigid with arm 60 and gears 63 and 64 are
rotatably mounted on these shafts, respectively. As seen from the
sectional drawing in FIG. 6, gear 64 is kept in meshing with gears
65 and 66 rotatably mounted on a shaft 68 made rigid with the plate
10. The ratchet means 66a; 67a are so designed and arranged that
rotation is transmitted therethrough only with counterclockwise
rotation of gear 65. Gear 65 meshes gear 67 through said ratchet
means. Gear 65 is kept in meshing with gear 69 rotatably mounted on
the shaft 70. Rotation is transmitted from gear 69, only when
rotated in clockwise direction, through ratchet means 69a; 71a to
gear 71 which is kept in meshing with date calendar ring 40.
Calendar ring 40 and day star wheel 36 are controlled by jumper
means as conventionally, although not specifically.
With clockwise rotation of gear 29, both calendar rings are
subjected to correction in unison.
With counter clockwise rotation of gear 29, arm 60 is
correspondingly swiveled and gear 63 is shifted to a position shown
at 63a and gear 64 to a position shown at 64a. Rotation will be
thus transmitted from the gear 29 through gears 58, 63a, 69 and 71
to date ring 40 which is thus subjected to a corresponding
correction.
At this stage, gear 69 is kept in meshing with gear 65, but gear 64
does not act as a member of the related gear train, thus, no
rotation being transmitted to the gear 66. It will be seen that in
this case the correction is made only upon the date ring 40.
Further, referring to FIGS. 7 and 8, the fourth embodiment will be
described in detail.
In the present embodiment, the following numerals denote respective
same parts as before, thus a further analysis of these parts have
been omitted:
10; 10a; 11; 11a; 12; 12a; 12b; 13; 13a; 14; 14a; 14b; 14c; 14d;
15; 16; 17; 18; 18a; 19; 20; 21; 22; 23; 23a; 23b; 23c; 23d; 24;
25; 26; 27; 28 and 29.
Gear 29 is fixedly attached with gear 121 and an arm 122 is
pivotably mounted on the shaft 25, said arm 122 fixedly mounting in
turn a shaft 123 which mounts a gear 124 carrying thereon two pins
126a and 126b adapted for meshing with a date gear 125 having 31
gear teeth formed in its periphery.
With clockwise rotation of gear 29, rotation is transmitted
therefrom through gear 30 to day calendar ring 127. At the same
time, rotation will be transmitted through gear 124, pins 126a and
126b and date gear 125. Therefore, both date and day corrections
are brought about.
With rotation of gear 29 in counter clockwise direction, the day
calendar ring will be rotated in the reverse direction as in the
above case, but, on account of counter clockwise rotation of arm
122 causing the pins 126a and 126b to disengage from gear 125, and
therefore the date calendar ring being affected in no way.
Under the regular working conditions of the timepiece, the lever 17
is brought to its counterclockwisely rotated position. The arm 122
is urged mechanically by contact with a pin 17d formed on the
projecting part 17c of lever 17 so as to release the engagement
between pins 126a; 126b and gear 125 and thus there may be a
possibility of the engagement of gear 121 with day calendar ring
127. But, it may be observed that all the gears meshing with the
gear 121 are kept in their free position, thus no mechanical
interference being invited in this case.
Next, referring to FIGS. 9 and 10, the fifth embodiment of the
invention will be described in detail. The position shown in FIG. 9
is that for spring winding.
Winding stem 128 mounts rotatably a winding pinion 129 and the
conventional square section part of the stem 128 a conventional
clutch wheel 130 is mounted nonrotatably, yet axially slidably.
Clutch lever 132 urged resiliently by a conventional clutch lever
spring 131 is kept by its projecting end in engagement with a ring
groove formed on the stem 128 as before. Under normal operational
conditions, therefore, the clutch wheel 130 is kept in engagement
with the winding pinion 129. Rotation of the winding stem can be
transmitted to a conventional crown wheel for winding the power
spring, not shown. In this operational stage, it is natural that
clutch wheel 130 is kept in disengagement from the setting wheel
133.
In FIG. 10, the quick-calender correcting position of the same
embodiment is shown, being of the one step drawing out type.
With the winding stem 128 drawn out, setting lever 134 is rotated
in the counterclockwise direction and the projecting end shown at
134a of the lever will rise up along the convexly curved surface
shown at 132a of clutch lever, the latter being thereby urged to
rotate in the counterclockwise direction so that clutch wheel 130
is brought into engagement with setting wheel 133 by virtue of the
mechanical cooperation of the tip end of clutch lever 132 with a
ring groove formed on the clutch wheel. At the same time, the
engagement between winding pinion 129 and clutch wheel 130 is
released. A spring 136 is provided for urging the lever at 135
pivoted on the setting wheel shaft to rotate in clockwise
direction.
A gear 137 rotatably mounted on a shaft rigid with lever 135 is
kept in engatement with setting wheel 133 and urged by a spring 136
against a gear 140 which is fitted with a further gear 139 kept in
meshing with the day star wheel 138.
A lever 141 is rotatably mounted on the shaft of gear 140 and
mounts a further shaft mounting a gear 142 meshing with said gear
140. The gear 142 is so designed and arranged that with clockwise
rotation of gear 140, the gear 143 fixed on gear 142 is brought
into engagement with date ring 144 for the correction thereof, so
that, in this case, the both calendars day and date, are subjected
to correction simultaneously. On the other hand, when gear 140 is
rotated in the counterclockwise direction, gear 142 will escape or
recede in the counter clockwise direction so that the gear 143 is
released from engagement with date ring 144. Thus, correction is
made only on through the day star wheel.
It can be thus seen that in the present embodiment, a regular
rotation of the winding stem, both calendars are corrected, while
with a reversed rotation of the stem, the day calendar is corrected
in the reverse sense.
In FIG. 11, the shown position is that for time setting.
The winding stem 128 has been brought to a still further drawn out
second position. By this manual operation, a pin 134b mounted on
the setting lever 134 acts upon the lever 135 to rotate it in
counter clockwise direction against the action of spring 136 so
that gear 137 is brought into engagement adapted for transmitting
the rotation of setting wheel to minute wheel 145.
Further transmission of the time setting effort from the minute
wheel is carried out as in the conventional way. Although the
position of setting lever 134 is at this stage somewhat different
from that shown in FIG. 10, the clutch lever will occupy a
substantially same position as before so that the clutch wheel 130
is kept in engagement with the setting wheel 133. Although the
winding stem 128 and the setting lever 134 have been omitted only
for simplicity, these parts are kept in position for being
prevented from slipping out of the timepiece movement, by virtue of
the provision of a setting lever spring, as was referred to
hereinbefore.
Finally, the sixth embodiment of the invention will be described.
In the present embodiment, the day calendar can be corrected in
either direction, but the date calendar may be adjusted in one
direction only, as was referred to hereinbefore in connection with
the fourth to the fifth embodiment.
The position shown in FIG. 12 is that for time setting and that
shown in FIG. 13 is for calender correction.
In FIG. 12, the full line position of the main working parts are
those ready for for the spring winding operation, while the
chain-dotted line position for the time setting.
In FIGS. 12 and 13, several working parts already described
hereinbefore in connection with the first embodiment are
represented with respective same reference numerals, each, however,
attached with a prime.
Thus, 12' represents a conventional setting lever; 12b' a setting
lever pin; 20' a pivot shaft thereof; 23' a setting lever spring;
23a' a pivot shaft thereof; 23c' a first elastic arm similar to
that shown at 23c in the foregoing; 23d' a second elastic arm
similar to that shown at 23d in the foregoing; 24' a minute wheel;
29' a gear; 30' a pivotable lever similar to that shown at 30 in
the foregoing; 32' an intermediate gear; 33' a shaft similar to
that denoted 33 in the foregoing; 34' a gear; 35' a further gear;
36' a day star wheel; 40' a date calendar dial; and 44' a jumper
lever for control of star wheel 36'.
When the setting lever 12' is swiveled in clockwise direction in
FIG. 12 from its full line position to its chain-dotted line one by
drawing out the winding stem, not shown, from its spring winding to
its time setting position, a pin 146 rigid with lever 12' will act
upon one end 147a of a change-off lever 147 rotatably mounted on a
shaft 148 rigid with the conventional plate, not shown, thereby the
lever 147 being caused to rotate in clockwise direction in FIG. 12,
against the spring action exerted by an elastic arm 149a formed on
a minute wheel positioner 149 which is fixedly attached to the
plate, not shown, by means of a set screw 150 and a positioning pin
151 which is studded on the plate and in engagement with a
cooperating recess 149b formed on said positioner 149.
With the temporarily of setting lever 12' in clockwise direction,
the tip end 12'c of the latter acts upon an inclined end surface
30'a on the lever 30' so as to tempararily turn the latter in
clockwise direction against the resilient action exerted thereupon
by a spring strip 152 the root end of which is fixedly mounted the
lever 30' , although the fixing means have been omitted from the
drawing only for simplicity. However, the lever 30' will occupy
substantially the same position shown in full line in FIG. 12,
because the thus clockwise turned setting lever 12' is brought by
its tip end 12'c into engagement with a recess 30'b formed on the
lever 30'. Thus, gear 32' mounted on the lever 30' will
substantially occupy the shown position.
At this operational stage, the intermediate gear 29' mounted in the
present embodiment on the change-off lever 147 will occupy the
shown position in which the latter is kept in separation from the
gear 32'. During the time setting operation by manipulating the
winding stem for this purpose, motion is transmitted therefrom to
the gear 29' in the same manner as was referred to in the foregoing
several embodiments, thus the gear 29' being kept in rotation at
this stage, wherein the last-mentioned gear meshes a further
intermediate gear 153 rotatably mounted on the plate. Motion is
transmitted from gear 153 through minute wheel 24' and minute
pinion 154 made rigid therewith. The minute pinion 154 rotates a
conventional cannon wheel 155, thus the minute hand, not shown, is
rotated as desired.
Finally, referring to FIG. 13, the chanin-dotted line position of
several main working parts corresponds to that shown in full lines
in FIG. 12.
The full line position in FIG. 13 is that of the calendar
correction.
When the winding stem, not shown, is drawn out from the spring
winding position axially thereof one step to the calender
correcting position, setting lever 12' is rotated in clockwise
direction in FIG. 13 into its full line position. Thus, lever 30'
is rotated in clockwise direction from its chain-dotted line to its
full line position. At the same time, the change-off lever 147 is
also rotated in clockwise direction so as to occupy its full line
position. In this case, gear 29' is brought into meshing relation
with gear 32' carrying rigidly thereon a pinion 156 which is now
brought into engagement with an intermediate pinion 157 mounted
rotatably on the plate, on account of the pinion 156 rotatably
mounted on the lever 30'. Gear 157 is permanently kept in meshing
with gear 34', a gear 35' serving as a driver for day calendar
correction being coupled concentrically with the gear 34' through a
friction coupling, although not specifically shown. The gear 35' is
kept at this operational stage in meshing with the day star wheel
36'. By rotation of the winding stem in either direction under
these operational conditions, the day calendar dial, not shown, is
corrected in one direction or in another direction, as the case may
be, depending upon the rotational direction of the winding stem.
When a driving torque, if applied from the regular gear train
including cannon wheel 155, to star wheel 36', no day calendar
correction will be invited, because such torque may be relieved
through said friction coupling.
In this embodiment, an improved jumper lever 44' having two tooth
projections 44'a and 44'b is arranged to cooperate with the star
wheel 36', so as to provide two holding positions to the wheel for
providing two different day calendar displays, such as, for
instance, expressed in English and German.
Simultaneously with the day calendar correction, rotation is
transmitted from gear 32' to gear 242 permanently meshing
therewith, the latter gear cooperating with a date correction
pallet 243 through an one way clutch, not shown, arranged between
the gear 242 and the pallet 243, as at 66a shown at 66a; 67a in
FIG. 6. The pallet is arranged to drive the date calendar dial 40',
only partially shown. Therefore, motion is transmitted normally
from gear 242 to the pallet so as to rotate the latter in clockwise
direction. When the gear 242 is rotated in the opposite or counter
clockwise rotation by rotation of the winding stem in the opposite
direction, no torque will be transmitted from the gear 242 through
the one way clutch to the pallet, thus no correcting effect being
transmitted to the dage calender dial 40'.
Holding plate 159 is fixedly attached to the plate by means of a
plurality of set screws of which only one is shown at 160, a spring
arm 159a projecting the main part of the holding plate 159, so as
to contact from upper with the pallet 243 so as to provide an axial
pressure onto the one way clutch to keep it always in its
ready-for-operational position.
For the regular drive of the date from the side of the normal gear
train of the timepiece movement, the pallet 243 must be disengaged
from the dial, in order to avoid an excess energy consumption of
the drive poser source. For this purpose, there is provided an
elongated spring arm 161 which is fixed at its root end to the
holding plate 159, while the free end of the spring arm is kept in
pressure contact with the tooth space on the pallet.
In the similar way, a further elongated spring arm 162 is provided
for the gear 35'.
* * * * *