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Патент USA US3091926

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June 4, 1963
J. A. VAN HORN
3,091,916
AUTOMATIC REGULATOR FOR A TIMEPIECE
Filed May 19, 1960
2 Sheets-Sheet l
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VIII.
20
I
INVENTOR
Jul-m A. v») HORD
BY WM ?ak
ATTORNEYS
June 4, 1963
J. A. VAN HORN
3,091,916
AUTOMATIC REGULATOR FOR A TIMEPIECE
Filed May 19, 1960
Fig.5
2 Sheets-Sheet 2
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@
70
a
-
m
JOHN A.VAN HORN
/
‘
W?‘ &ATTORNEYS
3,091,916
Patented June 4, 1963
1
2
amount of regulation from the front of the clock with
3,091,916
AUTOMATIC REGULATOR FOR A TIMEPIECE
John A. Van Horn, Lancaster, Pa, assignor to Hamilton
Watch Company, Lancaster, Pa., a corporation of Penn
out tampering with the regulating mechanism itself. As
regulation each time that the hands of the clock are set
adapted to existing clock movements since the mere addi—
tion of a series of inexpensive gear wheels is necessary.
a second advantage it is possible to correct a regulation
in the wrong direction which has been injected by in
sylvania
advertently moving the clock hands in the wrong direc~
tion. Neither of these advantages is possible with the
Filed May 19, 1960, Ser. No. 30,182
22 Claims. (Cl. 58-855)
>
limit and lock-out systems previously mentioned.
According to the speci?c embodiment of the invention
This invention relates to a timepiece with an automatic
illustrated herein the regulating element is connected to
regulator and more particularly relates to a timepiece so 10 the setting element through an intermittent low velocity
constructed as to automatically accomplish regulation
drive mechanism, such as, a Geneva drive. Such an ar
thereof when the hands of the timepiece are set.
rangement causes the regulating element to be driven at
This application is a continuation-in-part of applica
a predetermined rate during the period of engagement of
tion of John A. Van Horn, Serial No. 840,373, ?led Sep
the drive mechanism followed by no movement of the
tember 16, 1959, now abandoned. Conventional time 15 regulating element during the ensuing motion of the
pieces, such as watches and clocks, are ordinarily pro
drive mechanism. The drive mechanism then Ire-engages
vided with a regulator which is accessible either from the
to cause further movement of the regulating element at
inside of the case or from the back of the timepiece so
the predetermined rate and the sequence is inde?nitely
that the timepiece may be regulated to keep accurate
repeated to provide what essentially amounts to a low
time. In certain types of timepieces, however, such as
velocity drive between the setting element and the regulat
automobile clocks, the mounting of the clock makes it
ing element. This intermittent low velocity drive is re
di?icult to provide a readily accessible regulator which is
ducible to a very simple mechanism of low cost and high
not also subject to undesired tampering, such as by chil
reliability which provides effective automatic regulation
dren. In solving this difficulty, it has been proposed to
with the advantages previously mentioned. In addition
provide an automatic regulator which is actuated to cause 25 to this, such an automatic regulation system is readily
to correct an inaccurate time indication.
\
In a certain type of regulator of this nature which has
been proposed heretofore it has been suggested that it is
essential for proper automatic regulation that some means
he provided to insure that the regulation set into the
clock in a speci?ed period of time is limited to a pre~
determined maximum. As one means of accomplishing
It is accordingly a primary object of the present inven
tion to. provide an improved automatic regulator for a
timepiece.
It is another object of the invention to provide an im
proved automatic regulator for a timepiece wherein there
is no limitation on the amount of regulation which can be
this, it has been suggested to always vary the regulator
injected into the timepiece at any given setting ‘of the
by a predetermined ?xed amount each time that the 35 hands but wherein the rate of movement of the regulator
hands of the clock are set. One such example of this type
corresponding to a given increment of movement of the
of regulator is shown in Rabinow Patent No. 2,542,430.
setting of the hands is non-uniform.
According to another suggestion of the same inventor
It is another object of the invention to provide an auto~
(Rabinow Patent No. 2,858,029) it has been proposed to
matic regulator for a timepiece wherein the amount of
utilize limit means for limiting the magnitude of change 40 regulation corresponding to a given increment of setting
of adjustment for a change in indication within a pre
of the hands varies as the hands are set so as to provide
determined period of time to insure that at no time will
a non-linear unlimited automatic adjustment to the rate
the change in regulator adjustment exceed this predeter
mined amount. In conjunction with such limit means
this same inventor provides a regulator “lock-out” so that
it is impossible to re-regulate during the predetermined
period of time.
As opposed to this prior concept of a limitation on
regulator of the timepiece.
It is another object of the invention to provide an auto
matic regulator including an intermittent low velocity
drive between the setting mechanism and regulating
mechanism.
~
It is another object of the invention to provide an
the maximum regulation which may be injected into the
clock in a predetermined period of time, the present in
automatic regulator including an intermittent low velocity
vention utilizes a system which provides for regulation as
a non-linear function of clock setting. That is to say,
there is no limitation on the amount of regulationwhich
anism and regulating mechanism.
drive such as a Geneva ‘drive between the setting mech
It is still another object of the invention to provide an
automatic regulator which has no limit on the amount
can be injected into a clock at a given setting or in a
of regulation which may be injected in one setting and
predetermined period of time except, of course, by the 55 no means to lock out the regulating mechanism for a pre
inherent limit of movement of the rate regulator itself
determined period of time but which still provides prac
(not shown), but the regulation occurs at a non-uniform
tical insurance against the injection of excessive regula
rate so that regulation is effected at a high rate only dur
tion.
ing the initial movement of the setting stem and then is
These and further objects and advantages of the in
60
effected at a much lower rate or at a zero rate until the
setting stem has been twisted a certain predetermined
amount. At this time, regulation again occurs at the
high rate and the sequence may be inde?nitely repeated.
As one advantageous result of this system it becomes
possible for a jeweler or clock repairman to inject a large
vention will become more apparent upon reference to
the following speci?cation and claims and appended
drawings, wherein:
,
FIGURE 1 is a perspective view of an automatic regu
lator constructed according to one embodiment of the
invention;
3,091,916
3
FIGURE 2 is a vertical elevation, partially in section,
of the regulator of FIGURE 1;
ll
raise the setting pinion 20‘ to a position where it engages
minute wheel 18 so that upon rotation of the setting knob
lator constructed according to another embodiment of
24 the minute and hour hands of the clock are rotated
in a conventional manner through rotation of minute
the invention wherein the amount of regulation for a pre
determined rotation of the setting knob is increased;
FIGURE 4 is a perspective view of an automatic regu
staff 22 elevates arm 42 of bent leaf spring 26 to cause
FIGURE 3 is a perspective view of an automatic regu
wheel 18, minute pinion 14 and hour wheel 10‘.
This same lifting motion of setting knob 24 and setting
gears 36 and 38 to be elevated to place the teeth of gear
38 in meshingengagement with the teeth of hour wheel
FIGURE 5 is a perspective view of the crown wheel 10 18 and to place the pin 52 in engagement with the teeth
of gear 68. Thus, the same rotation of setting knob 24
utilized in the embodiment of the invention shown in
which introduces setting motion into the hands of the
FIGURE 3; and
lator constructed according to another embodiment of the
invention;
FIGURE 6 is a perspective view of still a further em—
bodiment of the invention showing the use of a full
Geneva drive.
FIGURES l and 2 illustrate a timepiece having an hour
wheel 10 meshing with a minute pinion 14 and driving an
hour hand 12. The minute pinion 14 is attached by shaft
16 to the conventional minute wheel 18 and this is adapted
clock also causes rotation of pin 52 with a concomitant
rotation of gear 68 and regulator wheel 58 so as to
introduce unlimited automatic regulation into the time
piece.
Regulation is introduced at a substantially uniform
rate until the pin 52 clears the teeth of gear 68 and then
ceases completely. As the setting knob 24 is further ro
to be driven by setting pinion 20‘. Setting pinion 28 is 20 tated no further regulation occurs until the pin 52 has
been caused to make a complete revolution and again
arrives at a position to engage the teeth of the gear 68.
At such re-engagement the regulator wheel 58 is again
moved at the same initial rate until the pin 52 again clears
having one arm 28 secured to a post 30 which is attached
to the clock frame in any suitable manner. The setting 25 the teeth of gear 68. After the timepiece has been set
and the setting knob 24 released the bent leaf spring 26
staff 22 has a necked-down portion 32 received in a slot
returns the elements to the positions shown in FIGURE
34 at the end of arm 28 of leaf spring 26. The setting
1 except for the fact that the pin 52 is now at a different
staff 22 may be raised upwardly against the biasing force
position determined by the amount of rotation of the set
of the leaf spring until the setting pinion 20 engages the
minute wheel 18 so that the hands of the clock may be set 30 ting knob 24.
Gear 36 has also been rotated so that its teeth are
in a conventional manner.
now in engagement with the teeth of the hour wheel 10
A double gear comprising an upper gear 36 and lower
and gear 36 is thereby caused to rotate as the clock runs
gear 38 is secured to a shaft 40‘ journalled in the clock
until the cut-away portion 58 is again returned to the
frame in any suitable manner which will permit axial
motion of the shaft. The position of the shaft is deter 35 position shown in FIGURE 1. This returns the pin 52 to
a position wherein it is again in readiness to engage the
mined by leaf spring 26 which is shown to have a second
teeth of gear 68 to effect movement of regulator wheel 58
arm 4-2 having an upwardly bent end portion 44 with a
upon further setting of the timepiece.
bifurcated end. The furcations 46 engage a necked down
By establishing the gear ratios such that a setting of
portion 48 of the shaft 40. The spring 26 determines the
attached to a setting staff 22 adapted to be rotated by a
setting knob 24. The position of the setting staff 22 and
setting pinion 20' is established by a bent leaf spring 26
position of the two gears in such a manner that when 40 siX or twelve hours correction into the hands of a time
piece is necessary to rotate the pin 52 one revolution it is
the setting staff 22 is in its non-setting position of the
virtually assured that over-regulation will not occur.
That is to say normal setting of the hands of the clock
would never approach such a large increment nor is it
away. The upper gear 36 also carries a pin 52 protruding 45 even probable that a child tampering with the hands of
the clock would be so persistent as to continuously turn
from its upper surface. Thus, when the setting staff 22
the setting knob in one direction an amount equal to six
is raised upwardly to‘ engage the setting pinion 20 with
or twelve hours.
the minute wheel 18 the leaf spring arm 42 is also raised
unit the hour wheel 10 normally engages the teeth of the
upper gear 36. The lower gear 38 is a full gear while the
upper gear 36 has a portion 50 where the teeth are cut
so that the end 44 of that arm raises gears 36 and 38
until the lower gear 38 is in mesh with the teeth of the
hour wheel 10. In this position the rotation of the hour
As a matter of fact there is now reason to believe that
the question of tampering with a clock and thereby intro
ducing unwanted regulation has been unduly magni?ed as
wheel 10 by the rotating action of the setting pinion 20
a regulation problem. The possibility of unwanted setting
causes rotation of the gears 36 and 38 to cause a corre
in the same direction for an undue increment is limited
and presents only one of several factors to be coped with
sponding movement of the pin.
A regulating wheel 58 is pivotally attached to the clock 55 by a truly satisfactory automatic regulator.
The possibility of intelligent introduction of large
frame at 60 and has a depending regulating arm 62
amounts of regulation is also a desirable feature in an
adapted to engage the hairspring of the timepiece in a
automatic regulator, as has been stated, and such a provi
conventional manner. The wheel 58 is provided with teeth
sion is incorporated in the mechanism shown in FIGURES
64 which mesh with the teeth of a pinion 66. Pinion 66
is attached to a gear 68 pivoted at 70 and located just 60 1 andZ. Referring to FIGURE 3 there is shown a modi?
cation of the mechanism of FIGURES 1 and 2 which
above the pin 52 when the gears 36 and 38 are in the rest
permits introduction of large amounts of regulation at a
position as shown in FIGURES l and 2. When the
still higher rate. According to the embodiment of the
gears 36 and 38 are raised by the action of the bent leaf
invent-ion the upper gear 36 is provided with three pins
spring 26 so that the hour wheel 10v drives gear 38, pin
52, 53 and 55 instead of the single pin 52 shown in FIG
52 is placed in a position to drive the gear 68 and this in
URE 1. Such an arrangement provides three times as
turn drives the regulating wheel 58 through pinion 66.
much regulation as the arrangement of FIGURE 1 for the
The operation of the regulator is as follows:
same setting stem rotation and obviously this amount may
In the position of the elements shown in FIGURES 1
and 2, hour wheel 18 and minute wheel 18 are rotated by
be varied by the use of two, four, ?ve, etc. pins. The
the power source of the clock which may be a spring or 70 remaining elements in the structure in FIGURE 3 are
an electric drive. The hour wheel drives neither gear 36
nor gear 38 inasmuch as the cut-away portion 58 of gear
36 is opposite the teeth of the hour wheel 10. When it is
desired to set the timepiece to any position in its time indi
cating range, the setting knob 24 is withdrawn upwardly to
similar to those shown in FIGURE 1 and are indicated
by similar reference numerals.
Referring to FIGURES 4 and 5 there is shown another
embodiment of the regulator of the invention wherein an
hour hand 72 is driven by an hour wheel 74». A gear 76
5
3,091,916
and pinion 78 are again provided as in the preceding em
bodiment for driving a regulating wheel (not shown)
similar to the regulating wheel 58 in the preceding em
bodiment.
In this embodiment of the invention the double gear of 5
spring 26 at its lower end.
Gear 66 is mounted on a
shaft 116 and this is also secured to spring extension 114
for movement therewith. Gear 112 drives the regulator
58.
The operation of this embodiment of the invention is
FIGURES 1 and 2 is replaced with a crown gear indi
as follows:
cated generally at 80‘ which is mounted on a shaft 82
In the neutral or non-setting position the ?nger 96
which corresponds to the shaft 40 in FIGURES 1 and 2.
is in slot 162 as shown in FIGURE 6. As the setting stem
The crown gear 80‘ is provided with a ?rst series of up
is withdrawn outwardly to set the clock, Geneva disc 92,
standing teeth 84 which are long enough to engage the 10 star wheel 98, gears 66 and 104 and clutch half 108 all
hour wheel 74- when the crown gear 80 is in its non
move upwardly. Clutch half 108 engages clutch half 110
setting position. The crown gear 80 is also provided with
to establish a drive connection to the regulator 58. As the
a limited number of shorter teeth 86 which cover a
hour wheel 10 is now rotated to set the clock the lower
sector corresponding to the cut-away portion 50 of the
double gear (not shown in FIGURE 6) drives the Geneva
upper gear 36 in FIGURE 1. Crown gear 80 also carries
disc 92 and ?nger 96 thereby drives star wheel 98 until the
a pin 88 as did the upper gear in the embodiment of FIG
?nger clears the slot 102. Further operation of the
URES 1 and 2.
Setting stem and corresponding rotation of Geneva disc
It is believed that the operation of this embodiment of
92 causes no further rotation of the star wheel (and
the invention will be clear from the prior description of
regulator) until the ?nger 96 has made a complete rota
the embodiment of FIGURES l and 2. In the position 20 tion and again engages the next slot ‘92 on the star
of the elements shown in FIGURE 4, the hour wheel does
wheel 98. The star wheel 98 is locked in position at
not drive the crown gear 801 inasmuch as its teeth are
all times except when it is moving under the in?uence
opposite the short teeth 86 thereof and do not engage these
of ?nger 96. After setting and regulation has thus been
teeth. When it is desired to set the timepiece, the set
accomplished the respective gears are lowered on release
ting knob is withdrawn upwardly to raise the crown gear 25 of the setting stem and the upper double gear (36 in
80 in the manner described in connection with FIGURES
FIGURE 1) returns the Geneva disc and star wheel to
1 and 2 to a position where the short teeth 86 engage
the position shown in FIGURE 6 in readiness for further
the teeth of the hour wheel 74. Rotation of the setting
regulation. This does not affect the regulator 58 since
knob causes the hour wheel to rotate and this rotation is
release of the setting stern disengages clutch 108—-110.
imparted to the gear 7 6 by means of the pin 88.
30
It will be obvious that various gearing ratios may be
Regulation is introduced at a substantially uniform
provided to regulate the amount of setting necessary to
rate until the pin 88 clears the teeth of gear 76 and then
inject plural regulation increments into the clock. As
ceases completely. As the setting knob is further rotated
a further alternative it is obviously possible to use plural
no regulation occurs until the pin 88 has been caused to
?ngers on the Geneva disc.
make a complete revolution and again arrives at a position 35
It will be appreciated that with the automatic regulators
to engage the teeth of the gear 76‘. At such re-engage
of this invention excessive regulation is prevented as a
ment the regulator wheel is moved at the same initial rate
practical matter while permitting the intelligent injection
until the pin 88 again clears the teeth of gear 76. After
into the timepiece of as much regulation ‘as is desired.
the timepiece has been set and the setting knob released,
That is to say, there is no arbitrary limit on the amount
the crown gear 80 drops to its non-setting position. Gear 40 of regulation which can be set into the clock at one
86' has been rotated so that its long teeth 84 are now in
engagement with the teeth of the hour wheel 74- and gear
89 is thereby caused to rotate as the timepiece runs until
the short teeth '86 are returned to the position shown
in FIGURE 4. This returns the pin 83 to a position
wherein it is again in readiness to engage the teeth of
gear 76 to effect movement of the regulator wheel upon
setting of the clock hands, thereby permitting regulation
corrections which are not possible with the limit and lock
out type of automatic regulation.
At the same time, while unlimited regulation is per
mitted, the nature of the regulation is such that regula
tion occurs at a relatively high rate during only a limited
predetermined rotation of the hands so that unless the
further setting of the timepiece.
hands are set through a time indication in excess of twelve
Referring to FIGURE 6 there is shown still another
hours (or any ‘other predetermined interval) an excessive
embodiment of the invention wherein a full Geneva mech 50 regulation of the rate regulator is not injected into the
anism is substituted for the pins of the prior embodiments.
clock. If regulation is again attempted after an initial
With such an arrangement the regulator is completely
setting which exceeds this predetermined amount of hand
locked during regulation periods except when regulation
setting, regulation does not occur.
actually occurs. According to this embodiment of the
Where a clock is to be set for a relatively small time
invention the gears 36 and 38 (not shown in FIGURE 6‘)
error, such as for instance, on the order of ten or ?fteen
have mounted thereabove a Geneva disc 92 having an
minutes, it is not at all uncommon for a person setting
arcuate cut-away portion 94 with a ?nger 96 extending
the clock to ?rst rotate the hands of the clock in the wrong
radially therefrom. The gear 66 has a star wheel 98
direction. With the limit and lock-out devices which
mounted therebelow with arcuate sides 98 having a radius
have been previously proposed this would inject an er
of curvature substantially equal to the radius of the Ge?
roneous regulation and it would be impossible to erase
neva disc 92. The intersections of the arcuate sides
this regulation until after a predetermined period of time
98 form protrusions which are formed with radial slots
had elapsed. With the unit of the present invention,
102 of a width slightly larger than those of the ?nger 96.
however, the injection of an erroneous regulation of a
The Geneva disc 92 is approximately twice as thick
small amount in this manner can be immediately cor,
as the star wheel 98 and in any event is su?iciently thick
rected by moving the hands of the clock in the proper
direction.
that elevation of the double wheels does not break the
engagement between the Geneva disc and the star wheel.
The invention may be embodied in other speci?c forms
The gear 66 meshes with a gear 104 which is mounted
without departing from the spirit or essential character
on a shaft 106. The gear 104 is slidable on the shaft
istics thereof. The present embodiments are therefore
106 and is held in position by a collar on the shaft (not 70 to be considered in all respects as illustrative and not
shown). Attached to the top of gear 104 is one-half
restrictive, the scope of the invention being indicated by
of a clutch 108, the other half being mounted thereabove
the appended claims rather than by the foregoing descrip
and attached to a gear 112 which is also slidable on shaft
tion, and all changes which come within the meaning and
106. Shaft 106 is slidably received in the watch frame
range ‘of equivalency of the claims are therefore intended
at its upper end but is secured to an extension 114 of 75 to be embraced therein.
3,091,916
7
What is claimed and desired to be secured by United
States Letters Patent is:
1. In a timepiece comprising: time measuring means;
time indicating means actuated by said time measuring
mean-s; time setting means having a setting and non setting
position for setting said time indicating means to any
position in its time indicating range; rate regulating
means for regulating the rate of said time measuring
means; automatic regulating means actuated by said time
setting means for cans-ing an unlimited adjustment of said
rate regulating means; said automatic regulating means
including an intermittent low-velocity drive means for
providing said unlimited adjustment of said rate regulating
means at a non-linear rate when said time setting means is
%
teeth being adapted to stop said crown gear from being
driven by said hour wheel when said drive means is posi
tioned for immediate meshing engagement with said rate
regulating means upon said time setting means being
moved to its time setting position.
.
10. In a timepiece as set out in claim 9 wherein said
means for moving said shorter teeth of said crown gear
to mesh with said hour wheel consists of a leaf spring
actuated by said time setting means.
11. A timepiece as set out in claim 1 wherein said
automatic regulating means includes a Geneva drive; said
Geneva drive comprising a disk engageable with a mating
star wheel, and clutch means arranged to drivingly con
nect said star wheel to said rate regulating means when
adjusted at a linear rate; said drive means being movable 15 said time indicating means is being moved through its
time indicating range.
into regulate and non-regulate positions and being coupled
' 12. A timepiece as set out in claim 1 wherein said
between said time setting means and said rate regulating
automatic regulating means includes a Geneva drive, said
means in its regulate position when said time setting means
Geneva drive being adapted to lock said rate regulating
is insaid time setting position, said drive means also being
movable into a neutral position; said drive means being 20 means against rate regulation adjustment except when
said automatic rate regulation is occurring.
moveable to its regulate position and in drive relationship
with said time measuring means when said time setting
means is moved to its time setting position; said drive
13. In a timepiece as set out in claim 12 wherein said
Geneva drive includes a disc having a periphery and at
least one protruding radial ?nger, and a star wheel having
means immediately beginning to move toward its neutral
position when said time setting means is moved to its 25 arcuate sides and radial slots adapted to be drivingly
non-setting position; and said drive relationship between
said time measuring means and said drive means being
automatically terminated when said drive means is re
turned to its neutral position.
engaged by said ?nger.
14. In 1a timepiece as set out in claim 13 wherein said
locking of said rate regulating means is effected by mating
engagement between said periphery of said disc and said
2. In a timepiece as set out in claim 1 including: means 30 arcuate sides provided on said star wheel.
15. A timepiece as set out in claim 1 wherein said
driven by said time measuring means to cause said drive
means to return to its neutral position.
3. In a timepiece as set out in claim 2 wherein said
automatic regulating means includes means for locking
said rate regulating means in position at all times during
periods of adjustment of said time setting means when
means to position said drive means includes a gear having
a ?rst group of teeth in mesh with said time measuring 35 said rate regulating means is not being moved.
16. A timepiece as set out in claim 15 wherein said
means of said timepiece when said time setting means is
automatic regulating means includes at Geneva drive
in non-setting position, said gear having a second group
mechanism driven by rotation lof said time setting means
of shorter teeth which are out of mesh with said time
and movable into driving engagement with said regulating
measuring means when said drive means is positioned
for immediate meshing engagement with said rate regulat 40 means, said Geneva drive mechanism being out of engage
ment with said rate regulating means when said time
ing means upon said time setting means being moved into
its time setting position.
setting means is in its non~setting position.
coupled to said time measuring means when said time
setting means is in its non-setting position; said gear hav
ing a cutout portion adapted to disengage said gear from
said time measuring means when said drive means is in
by said star wheel, and clutch means for drivingly engag
ing said gear means with said rate regulating means during
17. A timepiece as set out in claim 16 wherein said
4. In a timepiece as set out in claim 2 wherein: said
Geneva drive mechanism includes a Geneva disc, a star
means driven by said time measuring means to cause said
drive means to return to its neutral position includes a gear 45 wheel drivable land lockable thereby, gear means driven
periods of adjustment of said time setting means.
said neutral position.
18. A timepiece as set out in claim 17 wherein said
Geneva disc, star wheel and gear means are positioned
mating star wheel, and clutch means arranged to drivingly
means having time setting and non-Setting positions, rate
connect said star wheel to said rate regulating means when
said clock is set.
8. A timepiece as set out in claim 1 wherein said
automatic regulating means includes a crown gear having
a ?rst group of teeth in mesh with the hour wheel of
said time measuring means when said time setting means
regulating means for regulating the rate of said time meas
uring means; automatic regulating means actuated by said
reciprocable time setting means for causing unlimited
adjustment of said rate regulating means; said automatic
regulating means including ?rst and second superposed
9. In a timepiece as set out in claim 8 wherein said
crown gear has a ?rst group of long teeth about a larger
rocated into its time setting position.
by a leaf spring which engages and is movable by said
5. In a timepiece as set out in claim 4 wherein said
time setting means.
drive means comprises a pin mounted on said gear.
‘19. In a timepiece comprising: time measuring means
6. In a timepiece as set out in claim 1 wherein said
having an hour wheel; time indicating means actuated by
drive means comprises a plurality of pins mounted on said
55 said time measuring means; reciprocable time setting
gear.
means for setting said time setting indicating means to any
7. In a timepiece as set out in claim 1 wherein said
position in its time indicating range; said time setting
drive means comprises a Geneva disc engaged with a
gears; said ?rst gear being in mesh with the hour wheel
is in its n‘on~setting position, said crown gear having a 65 of said time measuring means when said time setting
means is in its non-setting p‘osition; means for moving said
second group of teeth movable into engagement with said
second gear into mesh with said hour wheel when said
hour wheel when said time setting means is moved to its
time setting means'is moved to its time setting position;
time setting position, and an intermittent low velocity
an intermittent low-velocity drive means associated with
drive means carried by said crown gear, said last named
drive means meshing with said rate regulating means when 70 said ?rst gear; and said drive means meshing with said rate
regulating means when said time setting means is recip
said time setting means is in its vtime setting position.
portion of its periphery and a second group of shorter
teeth about the remainder of its periphery, said shorter
20. In a timepiece as set out in claim 19 wherein said
?rst gear includes a cut-out portion adapted to stop said
gear when said drive means is positioned for immediate
3,091,916
9
meshing engagement with said rate regulating means upon
said time setting means being moved into its time setting
10
being received within said slotted portion for urging said
time setting means to its non-setting position.
position.
21. In a timepiece as set out in claim 19 wherein said
means for moving said second gear in mesh with said 5
hour Wheel consists of a leaf spring actuated by said time
setting means.
.
22. In a timepiece as set out in claim 21 wherein said
time setting means has a slotted portion, said leaf spring
.
.
References Cited m the me of thls patent
UNITED STATES PATENTS
2,858,029
Rabinow _____________ __ Oct, 28, 1953
FOREIGN PATENTS
737,002
Great Britain _________ __ Nov. 27, 1957
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