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Патент USA US2056905

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Oct. 6, 1936.
A. P. NEYHART
? 2,056,905
CALENDAR CLOCK MECHANISM
Filed Oct. 2, 1933
2 Sheets-Sheet 1
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ATTORNEY .
Oct. 6, 1936.
A. P. NEYHAFET
CALENDAR CLOCK MECHAN I SM
Filed Oct. 2, 1933
2 Sheets-Shee?i; ?9
TTORNE Y
Patented Oct. 6, 1936
2,056,905
UNITED STATES
PATENT OFFICE
2.056.905
CALENDAR CLOCK MECHANISM
Arthur P. Ncyhart, Los Angeles, Calif., assignor
of one-half to Kenneth T. Norris, Los Angeles,
Calif.
Application October 2, 1 933, Serial No. 691,765
16 Claims.
This invention relates to and has for a general
object the provision of a calendar mechanism
adapted to beconnected with a clock in such a
manner that the proper day of the week, day of
Cl the month and month will be visibly indicated on
or through the dial of the clock, in addition to the
hours and minutes indicated by the clock mecha
nism; and additionally contemplates the provi
10
sion of means operated by the power of the clock
mechanism, whereby the day of the week and day
of the month indications will be automatically
changed at the close of each day of twenty-four
hours, and the month indication will, likewise, be
changed automatically at the end of the last day
of each month, except in leap years, regardless
of the number of days in a month.
More speci?cally, this invention contemplates
the combination with a clock mechanism and a
dial for indicating the time of the day, of a set
of dials or discs which will be hereinafter referred
to as indicators, independently rotatable and op
eratively connected with the driven spindle of the
clock mechanism, and provided with means en
gageable with and under the control of a regulat~
25 ing means driven from the clock mechanism, for
automatically advancing the day of the week in
dicator and the day of the month indicator at
the close of each day of a month, and selectively
arranged for advancing the day of the month in
30 dicator one, two or four steps at the close of the
last day of each calendar month, and for advanc
ing the month indicator one step at the close of
the last day of each month.
Another object is to provide a simple and e??ec
tive means for setting the indicators at proper
positions in the event that the clock to which-my
improvements may be attached may be stopped.
Still other objects may appear as the description
=10
progresses.
I prefer to associate my improvements with an
electrically actuated clock mechanism having a
. dial for indicating the time of day and a power
operated spindle to which the hour and minute
hands of the clock are connected for operation.
In such event I provide a gear driven actuator
which is capable of rotation at but one-half the
speed of the hour hand of the clock, i. e. said
actuator makes but one complete revolution in
each period of twenty-four hours.
50
Said actuator is preferably associated directly
with the peripheries of the day of the week, day
of the month?and month indicators, through the
instrumentality of a detent which is under the
control of the actuator and serves to prevent the
rotation of all of the indicators except at the prop
(Cl. 58-5)
er times, and then only to proper extent, for coor
dinating the calendar with the clock mechanism.
The detent is preferably adjustable in order that
it may be released from the actuator and also
from the indicators, and manually operable means 5
is provided for regulating and effecting the re
lease of said detent when it may become neces
sary to set the calendar mechanism, as when the
clock may have stopped.
In general I have sought to provide a calendar 10
clock mechanism of maximum simplicity and
durability which is capable of production at a
minimum cost.
Such a mechanism is illustrated
in the accompanying drawings, in which:
Fig. 1 is a front elevation of a clock embodying 15
my improvements;
Fig. 2 is a rear elevation of the same;
Fig. 3 is a front elevation of the calendar indi
cating mechanism, with the face of the clock re
moved;
20
Fig. 4 is a sectional plan on line 4-4 of Fig. 2;
Fig. 5 is a sectional plan on line 5?5 of Fig. 3;
Fig. 6 is an enlarged?fragmentary section on
line 6?5 of Fig. 3;
Fig. 7 is a face view of the calendar setting de
20
vice; as seen from line 1?1 of Fig. 4;
Fig. 8 is a typical face view of one of a set of
friction plates adapted to be fixed to ?the driving
spindle of the clock and associated with and for
imparting movement to the calendar indicators, 30
thus partaking of the nature of clutches;
Fig. 9 is a face view of a spring washer a?ixed
to the end of the clock spindle for holding the
indicators and their driving plates in frictional
contact;
35
Fig. 10 is a fragmentary enlarged front view of
the indicators positioned in readiness for a trans
fer from the 28th day of February to the? 1st day
of March;
Fig. 11 is a view of said indicators showing 40
their relative positions at the completion of a
transfer movement from February 28th to
March 1st;
Fig. 12 is a similar view of the indicators pre
paratory to a change from January 31st to Feb- 45
ruary 1st;
Fig. 13 is a similar view of the same at the com
pletion of said change;
Fig. 14 is a similar view of the indicators pre
paratory to a change from a month of 30 days, as 50
in April, to the first day of a succeeding month;
Fig. 15 is a view of the same at the completion
of the change in date suggested in Fig. 14;
Fig. 16 is a fragmentary face view of the day
of the week indicator;
65
2
2,056,905
Fig. 17 is a similar view of the day of the month
Fig. 18 is a full face view of the month indi
cator;
Fig. 19 is a side view of a calendar indicator
setting cam;
'
Fig. 20 is a diagram showing a projection of
10
thereon, in annular arrangement and at regu
larly spaced points, the abbreviations for the days
indicator;
of the week, in sequence, as at 28, 23 etc. There
being seven days of the week, the indicator is
subdivided into seven segments of uniform size 5
and outwardly of each day designation a T
shaped aperture is provided in the indicator, as
the setting cam for indicating different positions
at 29, 29, etc.
of the cam with respect to the calendar indica
Radially opposite each of the apertures 29 and
the day designations 28 the periphery of indi 10
tors.
'
Brie?y . described,
my
improved
calendar
mechanism is adapted to be associated with a
suitable clock C having a dial D and a motor
driven mechanism E suitably mounted in a case
15 F. A typical clock mechanism usually includes
a pair of spaced plates I and 2 which are spaced
apart and secured together by means of spacers
3, 3, etc., and the dial D is held on the front of the
frame thus provided, while the mechanism E
20 is suitably supported between or on said plates.
In many clock mechanisms a driven spindle 4
is provided on which an hour hand 5 and a min
ute hand 6 is mounted coaxially. Minute-hand
6 is ?xed ,to spindle 4 and the hour-hand 5 isop
25 erated from shaft ?I through gears 4', ?I?, 8 and 9.
.
cator I4 is provided with a notch 36. The bot
toms of all of the notches 30 are at uniform dis
tances from the axis of spindle 4, and the inter
mediate arcuate portions 3|, 3|, etc., are also
concentric with the axis of spindle 4 and are of
a common radius.
On corresponding sides of the notches 30 teeth
32 are correspondingly formed and extend out
wardly for corresponding distances from the pe
ripheral portions 3|; also the corresponding edges
20
of said teeth form continuations. on radial, lines,
of corresponding lateral edges of the notches 30.
The day of the month indicator I5, which is
the innermost of the set of indicators, is pro
vided with regularly spaced and annularly ar
Gear 4' is ?xed to shaft 4 and gear 9 is loose on ' ranged numerals, as at 33, representing days of
-shaft 4.
the month, in sequence from ?1? to ?31? inclu
It will be noted that I provide but two addi
sive, thus subdividing this indicatorinto thirty
tional gears for operating the calendar mecha
onesegments. Radially opposite each of the day
30 nism of my invention, and that gear I6 is pref
of the month designations 33 a peripheral notch 30
erably arranged on the inner side of plate I on a 34 is formed which is in all respects similar in
pin II secured to said plate and is meshed with form, size and distance from the axis of spindle
and driven by gear 9 on spindle 4.? Gear I0 is 4 to the notches 30 in indicator I4. The notches
of a ratio of two to one with respect to gear 9, 34 for all of the day of the month designations,
35 so that it will make but one complete revolu
except for the twenty-eighth, thirtieth and 35
tion for each two revolutions of gear 9, or one thirty-?rst days of the month are separated by
revolution in every twenty-four hours.
similar arcuate intermediate portions 35 ar
Gear 9 may be provided as shownv in Fig. 6 ranged on a circle concentric with spindle 4,
with an extended shaft or hub I2 which is bored
40 to telescope the spindle 4, and additionally, with
thirtieth and thirty-?rst days.
said hub.
thirty-?rst day designations, differently formed
I employ the shaft or hub I2 as a
support for the three indicators I4, I5 and I6,
for a corresponding number of friction driving
plates,? as shown in Fig. 9, as at IT, I8 and I9.
An additional and similar plate 20 is also pro
50 vided externally of the indicator I4.
All of said driving plates are provided with
' central perforations '2I ?tting the shaft or hub
I2 and'with inwardly projecting teeth 22 which
65
75
Opposite
the . twenty-eighth,
thirtieth
40
and
peripheral cam segments 31, 3B and 39, respec
tively, are provided on the indicator I5 inter 45
mediate the notches 34,-34, and said cam sec
tions extend outwardly for gradually increasing
distances from the portions 35, in the order
named.
?
a
It will be observed that, as shown in Fig. 17, 50
the outer edges of the cam sections 31, 38 and 39
are inclined outwardly from their innermost to
their outermost extremities and in the direction
indicated by the sequence of the day of the month
hub. Thus the plates I_'I, I3, I9 and 20 are ?xed designations in Fig. 17; and left hand lateral
to and for rotation with the spindle 4. The indi
edges thereof correspond in form and in position
cators I4, I5 and I6, however are centrally bored to the similar edges of the teeth 36.
as at 24 so as to loosely ?t the shaft or hub I2.
The month indicator I6is provided ?with regu
The extended forward portion of said shaft or larly spaced and annularly arranged month des
hub I2 has an annular groove 25 thereon which ' ignations 40 and apertures 4I outwardly there 60
is engaged by a radially slotted spring washer 26 from and radially opposite said designations.
of concave cross section, the slot 21 therein be
Said indicator I6 also is provided opposite each
ing adapted to engage the groove 25 in shaft or of the month designations with peripheral
hub I2.
,
notches 42 which correspond in position and in
The washer 26 serves to hold the friction driv
form to the notches 30 in indicator I4 and 34 in 65
ing plates l1, l8, I9 and 20 in friction engage
indicator I5.
ment with the calendar indicators to which they
At corresponding extremities of the notches 42
are adjacent, whereby the continuous rotation of opposite all months having thirty-one days teeth
hub I2 tends to impart corresponding movement 43 are formed on the periphery of the indicator
to the indicators, The movement of the indi
I6 which correspond in position to the teeth 32
cators, except at the close of each day is pre
on indicator I4 and 36 on indicator I5 but are
vented by means hereinafter described.
substantially longer than the teeth on said other
By reference to Fig. 16 it will be observed that indicators. Each of themonth segments of indi
the day of the week indicator I4, which is the cator I6 has a peripheral arcuate portion 44 cor
outermost of the set of indicators, has marked responding as to distance from the axis of spindle 75
commonly engage a keyway 23 in said shaft or
60
cator I4, except opposite said twenty-eighth,
a circular plate I3 forwardly of the plate I, and
the hour hand 5 is secured to the outer end of
45 representing the days of the week, the days of
the month'and the months of a year, and also
55
and projecting teeth 36 are provided, as on indi
2,056,905
3,
4 to the similar portions on the day of the week su?iciently to clear the outer ends of the teeth 32
and day of the month indicators, except such and 36 on the indicators l4 and I5. When so
segments as are indicated by month abbrevia
tions having less than thirty-one days.
The month segments for February, April, June,
September and November are provided, respec
tively, with cam segments 45, 46, 41, 48 and 43
of variable form and length, corresponding to the
number of days in such months. The segment 45
10 is the longest for the reason that it represents
February with but 28 days and its length corre
sponds to four of the day segments on the day
of the month indicator l5, in order that a change
may be made to March 1st at the close of Feb
15 ruary 28th.
April having thirty days, the segment 46 is of
a length corresponding to but two of the day
segments, and the same is true for the cam seg
ments 41, 48 and 49 opposite the June, September
and November designations. All of the cam seg
ments 45, 46, 41, 48 and 49 have outer edges which
are inclined from the positions of lowest order
to the positionsiof highest order, according to the
sequence of designations on the indicator. For
instance, the lowest point on cam segment 45 is
opposite the February designation while the
highest point thereon is opposite the March des
ignation. The positions named correspond to the
designation ?28? and ?1? on the day of the month
30
indicator.
"
I
At the completion of each operation for chang
ing the date the indicators l4, l5 and 16 'are set
so that the notches 30, 34 and- 42 are in lateral
registration; also the'aperture 29 on indicator l4
and the aperture 4| on indicator 16, for given
dates, will register with each other and with one
of the designations on the day of the month in
dicator l5, as ?30? in Fig. 14. Thus the month
designation is visible through an aperture 29 of
indicator l4, and the day of the month is visible
through an aperture 4| of the month indicator
and also through an aperture 29 of the day of
the week indicator.
A detent 50 is oscillatably and siidably mount
45 ed on a transverse shaft 5i which is journaled in
plates I and 2 and is extended outwardly from
the plate 2 and is provided with a knob 52, by
means of which the shaft maybe rotated. Detent
50 has an elongated hub 53 which is slidable on
50 shaft 5| against the tension of a compression
spring 54 held on the shaft between hub 53 and
plate 2. An elongated pin 55 is fixed to the free
end of detent 50 and extends forwardly through
plate i and under the indicators l4, l5 and i6
and is adapted to seat in the notches 30, 34 and
42 of said indicators, respectively, when the indi
cators are at rest, for preventing the movement
of the indicators and holding them at proper po
sitions for indicating the dates.
60
>
Detent 5D underlies an actuator 56 which may
partake of the form of a pin attached to and pro->
iecting from a side of the gear ID. A hump 51
may be provided on the detent 50 for engagement
with actuator 56. Thus, as gear 10 completes
each revolution, once in each period of twenty
four hours, the actuator 56 will engage the hump
51 of the detent 50, thereby releasing the pin 55
Irom the notches 30 and 34 of the day of the
week and day of the month indicators 14 and i5,
70. respectively, so that both of said indicators will be
free to rotateto the extent of one day segment
for changing the date from one day to the next.
From the ?rst to the next to the last of the
month inclusive all operations of the indicators
i4 and I5 are similar, the pin 55 being moved
released, the indicators are caused to advance
one step each in their rotation by means of the
friction applied thereto from the driving plates
l1, l8 and I9.
On the last day of each month, however, the
operation of the day of the month indicator varies
to correspond to the number of days in the ex
piring month, and the month indicator must also 10
operate at such times for properly changing the
month indication on the calendar. As shown in
Figs. 10 and 11, at the close of the 28th day of
February, it is necessary to skip the 29th, 30th,
and 31st day indications on the day of the month 15
indicator in order that the following designation
may be the 1st day of March. Thus, opposite the
28th day indication on the indicator l5 the cam
section 37 is so positioned that upon the release
of the pin 55 of the detent 50 from the notches 30 20
and 34 of indicators 14 and I5, the initial move;
ment of indicator l5 in a clockwise direction as
seen in Fig. 10 will move the lower portion of
cam segment 31 beneath the pin 55, and during
the further movement of indicator l5 the inclined
portion of segment 31 will engage and move pin 55
further from the periphery of indicator [5 to a
point where it may engage the lower extremity
of cam segment 45 on the month indicator IS.
The month indicator, however, is held station 30
ary by the engagement of pin 55 with the radial
shoulder at the lowest point on cam 45 opposite
the notch 42 until cam 31 has moved the pin 55
into position for engagement with the peripheral
ly inclined edge of cam 45. 'I'hereupon, with the
pin 55 in the position shown in broken lines in
Fig. 10, the month indicator will be free to rotate
by the friction of its driving plates, and the con?
tinued movement thereof will gradually move pin
55 outwardly from the periphery of indicator l5
so as to clear the cam segments 38 and 39 on the
indicator l5, in succession.
When the month indicator has progressed in its
movement to a point at the remote end of cam
segment 45 the pin 55 will drop behind the end
of cam segment 39 upon the adjacent peripheral
portion 35 of indicator l5 and will gradually find ,
its way into the notch 34 opposite the day desig
nation ?1? on indicator l5.
The further move
ment of the month indicator and the day of the 50
month indicator is prevented by engagement or
pin 55 with the teeth 43 and 36 on said indi
cators, respectively. The day of the week indi
cator will continue to advance until one of its
teeth 32 also engages the pin 55, the day segments
on the indicator l4 being substantially longer
than the month segments on indicator l6 and
the day segments on indicator l5. Each of the
day segments on indicator I4 is longer at the
periphery than the periphery of cam section 45 60
on the indicator l6 and exceed the peripheral
length of the four day segments on indicator i5
corresponding to the four days from February
28th to March 1st.
As shown in Figs. 12 and 13, when a change is 65
made from the 31st day of a month to the 1st day
of a succeeding month the cam segment 33 on
indicator I5 is positioned so that upon the release
of pin 55 the day of the week indicator I 4 begins
to advance, as does also the indicator l5, and the 70
continued movement of indicator [5 further
moves the pin 55 by the engagement thereof ?with
the edge of section 39. When the movement of
indicator i5 has progressed to a point where the
pin 55 is at the remote extremity of segment 33, 75
4
2,056,905
said pin 55 will drop upon the peripheral portion
35 and ?nally ?nd its way into the notch 34 of
indicator I 5 and arrest the-movement of said
indicator. In the meantime the cam segment 39
will have moved pin 55 su?iciently to clear the
tooth 43 opposite the January designation on in
dicator It, thus releasing the'month indicator.
Thereupon the month indicator will continue to
rotate until the pin 55 engages the near end of
10 cam segment 45 thereon, and the day of the week
indicator will continue to rotate until said pin
engages the tooth 32 opposite the proper day of
in a clockwise direction for four-?fths of a revo
lution until the position ?A? on the dial 63 is
indicated, at which point the cam 59 will have 10
been completely restored to normal position, and
pin 55 will have reengaged the notches in the
indicators, preparatory to automatic operation.
the week designation.
In Figs. 14 and 15 I have shown the relative
15 positions of the three indicators for effecting a
change of date from a month having thirty days
to the ?rst day of a following month. In this
instance the cam segment 38 on indicator I5 is
20
SI of the cam 59 will have retracted the detent 50
and its pin 55 from engagement with the actuator
56 and indicators I4, I6 and I5.
whereupon the indicators may be moved manu
ally to indicate the proper month, day of the
month and day of the week. Following the set
ting of the indicators, the knob 52 is then turned
Indicators I5, I6 and I4 are reengaged by pin
55, in succession. as the cam 59 reaches positions
?C?, ?D? and ?E?, respectively, and at position
?A? said pin is positioned for reengagement with
actuator 56.
cam segment 46 on indicator I6, thereby suc
It will be understood from a consideration of
my invention that though I have shown and de 20
scribed my improved calendar mechanism in con
cessively releasing the day of the week, the day
nection with a clockv I may operate the same
of the month and the month indicators.
automatically merely as a calendar, by the ap
effective for moving the pin 55 into position for
engagement with and further movement by the
Ob
viously as pin 55 disengages cam segment 46 it _ plication of .power thereto from an electric or
mechanical motor such as are used in the op
25 will arrest the further movement of the indi
cator I5 and following that will arrest the move
ment of indicator I6. The indicator It will con
tinue to advance until pin 55 engages the tooth
32 thereon opposite the proper day of the week
30 designation. Cam segment 46 has a length cor
responding to but two of the day of the month
segments.
No provision is made in this simpli?ed mech
anism for changing the date at the end of Febru
85 ary in a leap year, and in such case the indicators
must be set manually, as hereinafter described.
The mechanism described is, however effective,
without manual attention, for indicating the
changes in date automatically for at least four
40 year periods.
The detent 5D is resiliently held in position
for engagement with the actuator 56 and with the
indicators I 4, I5 and It, by means of a tension
spring 58 which may be attached at its oppo
45 site ends, as shown in Fig. 2, to the pin II and
the extremity'of the detent, or otherwise.
Shaft 5| which supports the detent 50 carries
a setting cam 59 which is ?xed thereto and the
crowned periphery thereof is adapted to engage
503 a portion 60 of the detent, whereby the detent
may be disengaged from the actuator 56 and the
When applied to clocks the dial D is provided
with an aperture, as shown in Fig. l, of such
form and size and so positioned that the month, 35
day of the month and day of the week indica
tions may be visible at the face of the dial.
When arranged as shown, the appearance of the
clock is unimpaired, and hour and minute of a
day, the day of the week, day of the month and
month are simultaneously and continuously 40
indicated.
The mechanism is arranged preferably to effect
the changes of date at midnight of each day, but
may be arranged to make the changes at any
45
other suitable or desired hour of the day.
What I claim, is:
1. A calendar mechanism comprising a power
operated shaft, a plurality of superposed indica
tors having designations thereon, respectively, for
the months of a year, the days of a month and 50
the days of a week, all but the innermost of
said indicators having apertures through which
surface is subdivided into ?positions? and sections
portions of the inner indicators are simultane
of different form and length and include a posi
tion of rest which is designated as position ?A?;
a rather abrupt inclined section terminating at
postion ?B?; and a gradually declined section
having positions ?C?, ?D? and ?E? thereon at
regularly spaced points, said sections being des
ignated on the drawings as 5| and 62, respectively.
Plate 2 is provided with a dial 533 on its outer
face concentric with shaft 5I and provided with
ously visible, for indicating the designation of
a given date, means for applying power from
55
said shaft to said indicators independently, and
means engageable and cooperating with periph
eral portions of said indicators for normally hold
mg the same against rotation and operative for
releasing one or all of said indicators once in 60
each period of a calendar day, for changing the
correspond to the positions on the cam 59. Knob
52 also has a pointer 55 which visibly indicates
the particular position of the cam 59 at all times
dates indicated thereby.
2. A calendar mechanism as speci?ed in claim
16, including: cooperating means associated with
and for regulating the movement of said month 65
and said day of the month indicators, at the
with respect to detent 5B.
When it is desired to set the indicators I18, I5
spond to the number of days in a closing month.
designations ?A?, "B?, ?C?, ?D? and ?E? which
70
motors and which are in use, as well as to clocks
in the course of manufacture.
said cam are shown in Figs. 19_and 20. The cam
indicators I4, I5 and I6, at will. The details of
60
eration of clock mechanisms.
The simplicity, form and arrangement of the
mechanism herein shown and described readily
adapts the mechanism to application to clocks
which are either operated by spring or electric 30
and It, as at the end of February in a leap year,
the knob 52 is turned in a clockwise direction as
seen in Fig. 7 to the extent of one-?fth of a revo
lution, at which the pointer 65 will register with
the position "13? on dial 53, and the engagement
76 of the portion 60 of the detent 5D with the section
end of any month in a calendar year, to corre
3. A calendar mechanism as speci?ed in claim
16, including: manually adjustable means for re
tracting and extending .said releasable detent
means, whereby said indicators may be manually
set for a desired date, at will.
_
4. A calendar mechanism comprising a driving
75
2,056,905
means timed to rotate at a ?xed ratio relative
to the number of hours in a calendar day, a
plurality of indicators coaxially mounted and pro
vided with month, day of the month and day
of the week designations thereon, respectively,
friction driving elements engaging said indica
tors and connected with said driving means, a
detent common to and for engagement with and
5
11. A calendar mechanism as speci?ed in claim
8, including peripheral means on the day of the
month indicator for releasing and rendering the
month indicator operative for changing the
month designation at the end of a month, and
peripheral means on the month indicator for
varying the movement of the day of the month
indicator to correspond to the number of days
for normally holding said indicators stationary
10 in the intervals between the date; changing pe
in a closing month.
riods, and an actuator operatively )connected with
said driving means and with said indicators, for
automatically and selectively releasing said indi
cators at corresponding times in each calendar
15 day, for indicating successive dates of a year.
resetting thereof, at will.
5. A calendar mechanism as specified in claim
12. A calendar mechanism as specified in claim 10
8, including manually adjustable means for re
leasing said detent from said indicators for the
13. A calendar mechanism comprising a power
operated mechanism including a shaft, a plu 15
rality of co-axially mounted indicators arranged
on corresponding faces thereof with month, day
of the month and day of the week designations,
the operation of said indicators at the close of ? respectively, means for operatively- connecting
20 each calendar month, to correspond to the num
said indicators with said power operated mecha 20
ber of days in a closing month.
nism for independent operation, detent means
4, including: cooperating means on said indica
tors engageable with said detent, for regulating
6. A calendar mechanism as speci?ed in claim
4, including: manually adjustable means for ex
tending and retracting said detent, so as to render
25 said indicators operative 0r inoperative, at will.
7. A calendar mechanism as speci?ed in claim
4, including: means formed in all but the inner
most of said indicators, for rendering the cal
endar designations on all of said indicators simul
30
and peripheral means on said indicators engage
able with said detent means for normally hold
ing said indicators stationary between the rate
changing periods, and means for operably con
ated mechanism whereby said indicators may be
selectively released for rotation at the end of
each calendar day, for indicating the successive
taneously visible.
dates in a year.
8. A calendar mechanism comprising a power
operated means including a shaft, a plurality of
14. A calendar mechanism as speci?ed in claim
13, including: cooperating peripheral means on
indicators having designations thereon, respec
25
necting said detent means with said power oper
30
said indicators, for regulating the movement of
tively, for the months of a year, the days of a
35 month and the days of a week, said indicatorsv said month and said day of the month indicators,
at the end of any month in a calendar year, to 35
being arranged in superposed relation for indi
correspond to the number of days in a closing
cating successive dates, means for establishing
independent driving connections between said in
dicators and said shaft for rotation, a detent
40 common to all of said indicators for normally
holding said indicators stationary in the inter
vals between the date changing periods, and
means for operably connecting said detent with
said power operated means for selectively releas
45 ing certain of said indicators once in each calen
dar day, for changing the dates indicated, said
indicators having peripheral portions adapted to
be engaged by said detent.
9. A-calendar mechanism as speci?ed in claim
8, said indicators having peripheral segments ?for
eifecting the operation of the day of the month
indicator at the end of certain months, to cor
respond to the number of days less than thirty
one days in said months.
10. A calendar mechanism as speci?ed in claim
55
8, including peripheral means on the day of the
month indicator for releasing and rendering the
month indicator operative for changing the
month designation at the end of the month.
month.
7
15. A calendar mechanism as specified in claim
13, including: means for manually adjustingysaid
detent, for setting said indicators at will.
40
16. A calendar mechanism comprising a power
operated mechanism including a shaft, a plu
rality of indicators coaxially mounted on said
shaft and provided with month, day of the month
and day of the week designations thereon, re 45
spectively, frictional driving elements on said
shaft engaging and for rotating said indicators
independently, a detent means, means on the
peripheries of the said indicators engageable with
said detent means for holding said indicators 50
stationary in the intervals between date chang
ing periods, and means operatively connecting
said detent means with said power operated
mechanism, for releasing said detent from and
to eifect the selective rotation of said indicators
at corresponding periods in each calendar day,
for changing the dates indicated thereby, suc
cessively.
ARTHUR P. NEYHART.
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