U.S. patent number 3,842,590 [Application Number 05/374,314] was granted by the patent office on 1974-10-22 for calendar timepiece.
This patent grant is currently assigned to Citizen Watch Company Limited. Invention is credited to Toshitake Kato.
United States Patent |
3,842,590 |
Kato |
October 22, 1974 |
CALENDAR TIMEPIECE
Abstract
An improved calendar timepiece in which the correspondence
between the month and date can be easily adjusted to obtain any
desired date and month relationship.
Inventors: |
Kato; Toshitake (Tokyo,
JA) |
Assignee: |
Citizen Watch Company Limited
(Tokyo, JA)
|
Family
ID: |
23476232 |
Appl.
No.: |
05/374,314 |
Filed: |
June 28, 1973 |
Current U.S.
Class: |
368/35; 968/400;
368/319; 968/172 |
Current CPC
Class: |
G04B
47/003 (20130101); G04B 19/25 (20130101) |
Current International
Class: |
G04B
19/00 (20060101); G04B 47/00 (20060101); G04B
19/25 (20060101); G04b 019/24 () |
Field of
Search: |
;58/4-6,58 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Franklin; Lawrence R.
Attorney, Agent or Firm: Tobin; Robert T.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are as follows:
1. A calendar timepiece comprising:
a casing having a dial thereon;
said dial having hour indicia regularly spaced about the periphery
thereof, a first window, a second window, and weekday indicators
fixed on said dial adjacent said second window designating in order
Sunday through Saturday;
a month disc viewable through the first window having indicia
thereon designating the months of the year;
a calendar disc having indicia thereon designating the dates of a
month, said calendar disc indicia being located such that when the
first date is positioned adjacent the corresponding weekday
indicator, a complete monthly calendar is viewable through said
second window with each date aligned with the proper corresponding
weekday indicator;
setting means mounted on said casing for manually setting said
month disc and said calendar disc;
a timepiece movement;
hour, minute, and second hands driven by said timepiece movement
overlying said dial;
and a day disc driven by said timepiece movement having means
coacting with said date indicia for indicating automatically the
day of the month.
2. A calendar timepiece as in claim 1 further comprising means
connected to said setting means for selectively changing the month
disc and the calendar disc, and means connected to said setting
means for changing the month disc and calendar disc in unison.
3. A calendar timepiece as in claim 2 wherein the month disc and
the calendar disc are so arranged in said timepiece that when the
calendar disc and month disc are adjusted to indicate the correct
month and the calendar disc indicia is positioned adjacent the
corresponding weekday indicator, and the means for changing the
month disc and calendar disc are operated in unison to correctly
position the calendar disc indicia adjacent the corresponding
weekday indicator for the next month in said second window, the
month disc is correspondingly adjusted to correctly indicate the
next month within said first window.
Description
This invention relates to improvements in and relating to a
calendar timepiece.
There are several types of conventional calendar timepieces.
The most typical type of conventional calendar timepiece is one in
which the date or date and day of the week are represented on the
timepiece.
In the second and less popular type of timepiece, a series of dates
covering a complete month are arranged along the periphery of the
dial and a separate ring carrying week day representations is
rotatably mounted relative to the dial. Any desired week day-date
correlation for a month can be obtained by turning the desired
amount the date ring relative to the dial.
In the third and less popular type timepiece, the complete monthly
dates are represented on the dial in stepped week groups, the
months of a year also being represented on the same dial. A
rotatable ring carrying the indicia for the day and year in two
concentric circles is mounted below the dial (refer to U.S. Pat.
No. 3,621,648 patented Nov. 23rd, 1971 to Tooru Takagi). Any
desired day-date correspondence for a specifically selected month
can be established by turning the said ring, so as to bring the
corresponding year representation thereon into registration with
the selected month representation on the dial.
The aforementioned conventional calendar timepieces represent,
however, various drawbacks.
In the case of the first type of calendar timepiece, day-date
representation of only the instant day is shown.
In the case of the second type of timepiece, the day representation
is arranged repeatedly on a circle, thus confusion may be
frequently encountered.
In the case of the third type of timepiece, the first day of a
week, or Sunday, may not always be positioned at the left-hand
extremity of the calendar.
The main object is to provide an improved calendar timepiece in
which the varying correlations for week and monthly day dates can
be easily established.
It is another object of this invention to permit positioning the
first calendar day of the month in spite of any necessary calendar
adjustment in order to obtain any correct day-date correspondence,
at the beginning or left hand end of the calendar representation
when seen from the side of a viewer.
A subsidiary and optional object of the present invention is to
provide an improved calendar timepiece wherein the calendar
representation is grouped substantially similar to a wall
calendar.
In order to achieve the objects of the invention, several main
features are used as set forth in the present specification.
These and further objects, features and advantages of the invention
will appear more apparent when the following detailed description
of the invention is read with reference to the accompanying
drawings illustrative of several preferred embodiments of the
invention.
In the drawings:
FIG. 1 is a plan view of the outline configuration of a first
preferred embodiment of the invention.
FIG. 2 is an enlarged section of the first embodiment of FIG. 1
taken substantially along a section line II-- II shown therein.
FIG. 3 is a schematic view, illustrating the cooperation between
several parts employed in the first embodiment.
FIG. 4 is a plan view of the calendar display mechanism employed in
the foregoing embodiment, in an enlarged scale relative to FIG.
1.
FIG. 5 is a plan view of a date indicator employed in the calendar
display mechanism shown in FIG. 4, in an enlarged scale relative to
FIG. 1.
FIG. 6 is a view similar to FIG. 1, showing a second embodiment of
the invention.
FIG. 7 is a partial and enlarged cross sectional view of several
inner parts of the second embodiment, taken substantially along a
section line VII-- VII shown in FIG. 6. In FIG. 7 several
unimportant elements thereof, such as the crystal and the back
cover of the timepiece have been omitted from the drawing for
simplicity.
FIG. 8 is a similar view to FIG. 1, showing a third embodiment of
the invention.
FIG. 9 is an enlarged section, showing several modified parts of
the calendar display mechanism.
Now referring to FIGS. 1 - 5, the first embodiment will be
described in detail.
Numeral 1 represents a watch casing which comprises mainly a case
band 1a; a crystal 1b fixedly, but detachably, press fit to the
case band through the intermediary of a first resilient sealing
ring 1c; and a back cover 1d fixedly, but detachably mounted onto
said case band through mating screw threads 1e and a second
resilient sealing ring 1f.
A conventional dial 2 is provided with 12 hour symbols 2a arranged
concentrically thereon and further with sector-shaped windows 2b
and 2c in radial registration to each other for showing dates and
months in digital form. In the present embodiment, the dial 2 is
fixedly attached to the case band 1a by glueing. Numerals 3, 4 and
5 represent seconds-, minute- and hour hands, respectively.
The viewer may observe through first window 2b a correspondingly
limited part of the surface area of a rotatable date display dial
6, covering a month of a first composite calendar 6a printed
thereon. He may observe, at the same, time, through second window
2c a limited part of a rotatable month display dial 7, covering a
year of a second composite calendar 7a printed thereon.
A series of characters, S, M, T, W, T, F and S, are printed on a
narrow strip-like area defined by and between the windows 2b; 2c
for representing seven successive days of a week from Sunday to
Saturday. Numeral 8 represents a U-shaped, month indicator attached
fixedly at its root end to the dial 6 by glueing, welding or
similar conventional technique. In the present embodiment, the dial
6 has been made of a transparent plastic material, to permit
observation of one or two of indicator marks 9a, 9c . . . . . 9f
printed on the upper surface of a rotatable indicator dial 9 which
is arranged underneath the dial 6 concentrically therewith, as
clearly seen from FIG. 2.
Numeral 10 represents a conventional winding crown which serves
time-setting and barrel-winding functions. Circumferentially
displaced a predetermined small distance from the winding crown 10,
there is a manually operable knob 11 adapted for selective
adjustment of the rotational position of either dial 6 or 7, as
will be more fully described hereinafter.
Numeral 12 represents a conventional watch movement, only partially
shown, which is held in position by a holder ring 13, the latter
being kept in position by case band 1a and back cover 1c, although
the specific positioning means has been omitted because it is well
known in the art.
As a part of the watch movement 12, there is provided a cannon
wheel 14 which performs a complete revolution every 12 hours and an
hour hand 5 conventionally attached thereto. A date wheel 16
performs a complete revolution every 24 hours by being driven
through a duplicate gear type intermediate wheel 15 from the cannon
wheel. A gear 9b having 28 teeth is made integral and concentric
with the date indicator dial 9, as clearly seen from FIGS. 2 and 5.
Said date wheel 16 is fed one tooth pitch every twenty four hours
by contact with a drive pin 16a which is studded on date wheel
16.
The dial 9 is loosely mounted on the cannon wheel 14 and normally
held in position by contact with a conventional jumper, not shown.
The intermediate wheel 15 and date wheel 16 are rotatably mounted
on respective studs 15a and 16b which are studded on a conventional
pillar plate 12a belonging to the watch movement 12 and only
partially shown.
The dial 6 has been made from a transparent plastic material and
provided at the peripheral rim on the lower surface with a crown
gear part 6b having twenty eight teeth, said dial 6 being rotatably
mounted at its perforated center by the cannon wheel 14.
The first composite calendar 6a represents generally a sector-like
shape and comprises a group of dates covering two-odd months
partially overlapped and arranged in five parallel circumferential
rows and along 13 radial lines corresponding to 13 of 28 tooth
pitches of the crown gear 6b (see, FIG. 4).
Month display dial 7 is made of a plastic material, having an outer
rim 7b provided at its lower surface with a crown gear portion 7c
which has 28 teeth arranged in radial registration with similar
teeth at 6b. The rim 7b has a radially inwardly extending arm 7d
made integral therewith, said arm being made integral with a
concentric dial proper 7e. The thus formed dial 7 is rotatably
mounted at the correspondingly perforated center of the dial proper
on the cannon wheel 14. The second composite calendar 7a has
generally a sector-like outline and arranged along and inside of
the outer periphery of the dial proper 7e, as specifically seen in
FIG. 4. This calendar 7a comprises a group of digits representing
two 12 months year partially overlapped at "7" (July) and "4"
(April) and in three circumferential rows along 13 radial lines
corresponding to 13 of the 28 teeth pitches of the crown gear 7c.
Since the crown gears 6b and 7c have the same number of teeth
arranged in mutual radial registration and the same tooth pitches,
the second composite calendar 7a has the same sector angle with
that of the first composite calendar 6a.
Knob 11 is rotatably mounted in a bearing sleeve 18 which is
press-fit into the case band 1a and has its reduced diameter stem
11c freely and inwardly projecting from said bearing sleeve and
rigidly carrying a stepped positioner 11b and a clutch pinion 17
one after another. Said pinion is adapted for selective engagement
with either crown wheel 6b or 7c depending upon the axial position
of the knob 11, as will be more fully described. For assuring the
axially selected position of the knob 11, a click spring 19 is
fixedly mounted on the case band 1a, so as to cooperate with said
positioner 11b.
With the knob 11 and its stem 11c positioned as shown in FIG. 2,
pinion 17 is kept in engagement with the crown gear part 6b of date
display dial 6. When the knob and its stem are pulled out one step
from the position shown, the pinion 17 is brought into engagement
with the neighboring crown gear part 7c of month display dial 7.
Jumper springs 20 and 21 are fixedly mounted on the case band 1a
and kept in meshing engagement with the teeth 7c and 6b of these
dials 7 and 6, respectively, as specifically shown in FIG. 3, for
resiliently positioning the latter.
Numeral 22 represents a separator disc which is rotatably mounted
on the cannon wheel 14 for avoiding mechanical interference between
the dials 2 and 7 (FIG. 2).
As may be well seen from FIG. 1, a viewer can observe the first
composite calendar 6a through the related viewing window 2b. This
calendar is composed of a series of date digits covering a complete
odd month, said calendar having an arrangement of dates in
resemblance with a regular wall calendar.
The number of days depends upon the kinds of months or whether the
month is odd or even, and whether it is a regular or leap year. The
series arrangement of odd and even months is definite for each
regular or leap year. When the week day for January 1st, for
instance, of a regular or leap year is determined, all the week
day-date relationship for the remainder of the year is
determined.
When the months of a complete year are grouped according to the
week day begining the first day of each month, the following table
is obtained: January and October; May; August and leap year
February; non-leap year February, March and November; June;
September and December; and July, April and leap year January. The
second composite calendar 7a resides in two such month groups,
omitting, however, a common group of July, April and leap year
November, as example.
The operation of the first embodiment so far shown and described is
as follows:
As described hereinbefore, date indicator dial 9 is advanced
counter clockwise in FIG. 1 a tooth pitch 9b every 24 hours by the
driving action of pin 16a of date wheel 16. Date indicator mark 9a
is positioned on the dial 9, so as to have a radial distance
corresponding to that of the innermost row of the composite
calendar 6a, including date digits 1, 2 . . . . . 7. Mark 9c has a
one step longer radial distance corresponding to the second row
including the date digits 2 - 14 and it is positioned at a
90.degree. apart central angle, as measured clockwise in FIG. 5
from the first mark 9a. 9d, 9e and 9f are positioned successively
in the similar manner. Marks 9a, 9d and 9f are positioned on the
same radial line.
Rotation of the dial 9 is stopped by the action of a jumper, not
shown, when the marks 9a, 9c and 9f are brought into radial
registration with the date digits of the date calendar 6a. When it
is assumed that the position of the dial 9 is such that with
rotational movement thereof, the first mark 9a moves counter
clockwise from the date digit "1", then, the mark 9a will be
successively brought into registration with the digits "2" and "3"
for display thereof, upon the lapse of each 24 hours. When the
first mark 9a disappears from the display area of the window 2b,
the next succeeding indicator mark 9c will appear in the window 2b
from the left. Similar operational principles apply to further
indicator marks 9d, 9e and 9f in succession, and so on.
For convenience of the description, it is assumed that the instant
day is January 1st of a year. The watch wearer manipulates knob 11
shown in FIG. 2 so as to rotate the dial 6 through pinion 17 and
crown gear part 6b until the first date digit "1" is brought into
radial registration with a predetermined day symbol "T" (second
occurence) which means Thursday if the first day of the year
corresponds thereto, as shown in FIG. 1.
Next, the watch wearer must being the month digit "1" or "(1)"
corresponding naturally to January as mentioned hereinbefore, into
the next indicating space of a "U" of the member 8. For this
purpose, he can pull out knob 11 together with its stem 11c one
stop and turn it properly, so as to rotate the second dial 7
through gear meshing at 17; 7c.
Further, the wearer manipulates the time-setting crown or knob 10
through 14, 15 and 16 to the dial 9. Then, with the regular
time-keeping operation of the watch movement 12, successive
indicator marks 9c - 9f will scan the respective second, third,
fourth and fifth date digit rows, as was referred to hereinbefore,
as the month of January elapses. During this period, all the
successive date digits 2 - 31 are displayed one after another after
every 24 hours.
On the first day, Sunday, of February, the wearer manipulates the
knob 11 so as to rotate the dial 6 together with its month
indicator 8, to catch the second month digit "2" for regular year
or "(2)" for leap year by the indicator, whereupon the day-date
correspondence will become proper for February. When the last day
of the foregoing month (January in this case) corresponds to
Saturday, the dial 9 must be rotated 90.degree. in the reverse
direction. However, if the last day of the foregoing month
corresponds to any other day, such reverse rotation of the dial 9
is unnecessary. This is becuase the indicator marks 9a; 9c . . . .
. 9f are positioned on four quardrant lines and the first and fifth
indicator marks 9a and 9f are positioned on one and the same radial
line of dial 9, said four quadrants being allocated to 4 weeks of
the calendar.
With the regular time-keeping operation of the movement 12, the
marks 9a, 9c . . . . . 9f will scan all the date digits
successively for the indication of all the February dates, and so
on.
When the 31st day, Thursday, of December of the same year comes,
the wearer knows the type of day, Friday, of the first day of
January of the year. Then, he operates knob 11 positioned as shown
in FIG. 2, so as to bring the first date digit "1" of the first
calendar 6a into coincidence with the day mark, to bring the first
month digit "1" of the second calendar 7a into coincidence with the
month indicator 8, and so on.
Even before arrival of the first day of a month or a new year, a
calendar may be conveniently reproduced to permit advance
consulation of the calendar for optimum future planning or the like
by a corresponding advance manipulation of knob 11 in two different
ways.
Next, referring to FIGS. 6 and 7, the second preferred embodiment
will be described in detail hereinbelow.
In the present embodiment, the month indicator 108 represents a
small window formed through regular dial 102 in place of the
movable arrangement employed in the foregoing embodiment. Further,
month display window 102c is arranged on the dial 102, indeed,
substantially in opposition to date display window 102b relative to
the center of the dial. It is, therefore, necessary to provide date
display dial 106 and month display dial 107 with a possibility of
synchronous rotation in the same direction. Thus, the manual
operating mechanism for these dials is different in its structure
and function from that employed in the foregoing first embodiment,
while other operational means may be designed similar to those
corresponding parts of the first embodiment. For better
understanding and easy comparison of the present embodiment with
the first one, same or similar parts of the apparatus are denoted
with respective same reference numerals, each being added, however,
with 100.
Date display dial 106 is provided at its outer periphery with
twenty eight teeth 106b, a first or date composite calendar 106a
being formed on the upper surface of the dial 106. As seen, odd
date digits are only completely shown, while even date digits have
been replaced by respective dots for simplicity. The date of the
instant day can be demonstrated by one of the indicator marks 109a;
109c - 109f on date indicator dial 109.
Dial 102 is formed with date display window 102b and day marks 102d
"S, M, T, W, T, F and S" corresponding to a complete week and shown
in a slightly decorative mode.
Knob 111 having a stem 151 rigid therewith is axially slidably and
rotatably mounted in case band 101a in a water tight way by the
provision of a resilient sealing ring 150 and a bearing sleeve 118
which is fixedly mounted in the case band by means of fixing means
such as screws, or press fit, both of which are not shown. On the
inner end of the stem 151, a pair of pinions 152; 153 having pinion
teeth 152a; 153a, respectively, are rotatably mounted and kept
meshed with gear teeth 106b; 107c of date display dial 106 and
month display dial 107, respectively. These pinions 152; 153 are
made hollow and formed at their respective inner wall surfaces with
spline-teeth 152b; 153b, respectively, yet in phase with each
other. Axial shift of these pinions is prevented by a part of a
conventional movement holder, only a part thereof being shown, and
a positioner spring 119 which is rotatably mounted on the stem
151.
Stem 151 is formed on its peripheral surface at an intermediate
position between its end extremities with turn ring groove 111b, an
axial blind bore 111c also being formed in the material of said
stem. Said positioner spring 119 is mounted to be axially shiftable
in said turn ring groove 111b. Main part 154a of a substantially
S-sectioned spring key 154 is inserted under tension into said
axial bore 111c which is closed at 111d. A flared and hooked end
154b of said spring key 154 is kept in slidable engagement with the
spline grooves 152b; 153b of both pinions 152; 153 in unison, while
a smaller flared end 154c of the spring key is kept in engagement
with a lateral bore 111f which communicates with the blind bore
111c.
Thus, when knob 111 is manually rotated in its shown position,
motion will be transmitted therefrom to these pinions 152; 153.
With these pinions thus rotated by manipulation of the knob 111,
both dials 106; 107 are correspondingly rotated.
However, when the knob 111 is axially drawn out and rotated, motion
will be transmitted therefrom only to pinion 153, on account of the
limited engagement of the spring key with the spline groove 153b of
same. In this case, only month display dial 107 is adjusted as
desired in its angular position.
As aforesaid, the dials 106 and 107 can be rotatingly adjusted in
unison or separately. By the united rotation of both dials 106; 107
adjustment between date digits 106a and day marks 102d can be
brought about. By the single rotation of the latter dial 107,
adjustment between month calendar mark 107a and month indicator 108
is brought about.
Once preset in the above mentioned way, each monthly manual
adjustment can be made by the common rotation of both dials 106;
107, until the desired month display will appear at the small
window 108.
The whole manipulation procedures may easily be understood from the
above brief description of the second embodiment by consultation of
the foregoing detailed description of the first embodiment.
FIG. 8 illustrates a third embodiment of the invention. The
difference in this embodiment from the foregoing second embodiment
resides in mounting at 3 and 9 o'clock on both sides of its center
the window at 202b for the date digit display and that denoted 208
for month mark display. The month display window consists
exclusively of a small window at 208. Month display dial 20,
although not shown in its entirety, has a large outer diameter so
as to fully cover the third row of date digits (15, 17 and 19
illustrated on the drawing), but it is provided with a
sector-shaped large recess, (not shown,) for avoiding appearance of
month digits (shown specifically and representatively as (2) and 8)
in the window 202b. By adopting this measure, the month display can
be substantially enlarged for providing a clearer and more distinct
representation of successive calendar months. Numeral 209g
represents the dark colored part of the date indicator, while
numeral 209c represents a clear part thereof adapted to show the
specific and appropriate date digit concerned.
Other several parts which are denoted with the same reference
numerals as those in the foregoing second embodiment, yet each
having added the digit 100, can be easily understood in their
structure and function when consulting with the same or similar
parts shown and described in the second embodiment.
When common and unitary rotation of the date display dial and month
display dial is required as in the case of the second and third
embodiments, various drive mechanisms serving that purpose may be
adopted as occasion requires, other than that shown in the second
embodiment. In FIG. 9, a modification thereof is shown, wherein all
the reference numerals adopted have the same respective numerals
attached to those of the first embodiment, yet each has a "300"
added for easy comparison and identification.
Month display dial 307 is formed with a number of grooves 361 on
the inside surface thereof, the pitch of these grooves being
selected to be equal to the divided sector angle defining the
radial arrangement of the date digits. Date display dial 306 is
attached fixedly with a spring member 360 which is adapted for
successive engagement with said recesses 361. Case band 301a is
provided with a spring member 362 which is adapted for exerting a
resiliently frictional braking force upon the dial 307. When the
dial 306 is rotated forcibly, then it can not accompany the other
dial 307 on account of the braking force applied by the spring 362.
On the other hand, when the month display dial 307 is forcibly
rotated, it will accompany the neighboring date display dial
306.
* * * * *