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Патент USA US2118790

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May „4, 193.
R. FouQuEs ET A1.
2,11 18,79@
ELECTROMECHANICAL WINDING DEVICE
Filed June 5, 1936
2 Sheets-Sheet l
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M 5%@
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May 24, w3.
R, FOUQUES ET Al..
ELEGTROMECÍ‘IANICAL WINDING DEVICE .
Filed June 5, 1936
30
M139@
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2 Sheets-Sheet 2
Patented May 24, 1938
anais@
UNHTED STATES
ement aerien
2,118,790
ELECTROMECHANECAL WINDIN G DEVICE
Raoul Fouques and Jacques Lenfant, Paris,
France
Application June 5, 1936, Serial No. 83,739
In France July 3, 1935
2 Claims.
The present invention relates to an electro
mechanical device for periodic Winding, adapted
to be employed, in particular, for winding large
or small clocks or similar movements, or for
`5 driving at deñnite intervals, during a predeter
mined length of time, a controlling or signalling
mechanism.
One feature of the invention consists in a de~
vice for starting the winding or driving system at
deñnite intervals, this starting being eiîected by
the action of one or more pins rigidly connected
to a member driven by the motion of the clock or
movement, the said pin or pins acting on a lever,
I'or starting and stopping the winding operation,
H.Ui ’which displaces a pawl, the axis of which is
rigidly connected to this lever, and brings it into
engagement with the following tooth of a ratchet
wheel. When the lever is released (by the pin,
the displacement of which is continued during
the operating period) and restored to its initial
position by the action of a spring, the pawl causes
a rotation of the ratchet wheel corresponding to
the advancement of one tooth.
Another feature of the invention consists in
the combination of a cam disc mounted on the
same axis as the ratchet wheel, and a double
armed lever, the proñle of they said cam disc be
.ing such that one of the extremities of the lever
may be either in a raised position or in a low
30 ered position, according to whether its extremity
>rests on a projection or in a recess; to each of
these positions there corresponds a definite posi
tion of a pair of brushes, which are associated
with the commutator of an electric motor and
35 are rigidly connected to the second lever-arm
(stopping or running of the motor).
A further feature of the invention consists in
the combination of the above two mechanisms,
which combination allows, by the operation of
40 the starting lever, of elTecting the displacement
of the friction members which come into engage
ment with the commutator, and, consequently, of
obtaining the starting of the electric motor.
A still further feature of the invention consists
in that the brushes are brought into engagement
with the commutator by a sliding movement of
the said brushes on the commutator.
‘
Another feature of the invention consists in
the combination of a cylinder or barrel enclosing
50 the normal driving spring of the movement, with
the starting member of the winding system and a
wheel for winding the spring, the said wheel be
ing driven either by any mechanical coupling
device or directly by the electric motor and, con
sequently, causing the tensioning of the spring
(Cl. 185--11)
during the operation of the motor and having,
moreover, one or more stopping pins, the action
0i which on the starting and stopping lever
causes the stopping of the winding system after
a deñnite period of operation, by the action of
the levers .and of the ratchet wheel and cam disc
previously mentioned. A pin rigidly connected
to the cylinder drives the normal mechanism of
the clock or movement.
The invention will be better understood by 10
reference to the following more detailed descrip
tion, given by way of non-limiting example, of
the construction of a clock having a periodic
winding system conceived in accordance with the
spirit of the invention, and to the attached ng
ures, of which
Fig. 1 illustrates a complete rear View of the
mechanism of the clock and of the periodic wind
ing system. >Only the members which are neces
sary Íor understanding the invention have been
illustrated. Moreover, for the sake of clearness
0
in the illustration, the rear plate supporting the
members has been assumed to be removed.
Fig. 2 illustrates a sectional view oi Fig. l
along the line 4---£L
Fig. 3 is ‘a front view of the assembly of the
cylinder, starting member, Winding wheel and
driving wheel of the time mechanism.
Fig. 4 is a side View of the assembly of Fig. 3,
the different members having been spaced in
30
order to show their arrangement more clearly.
The operation of the periodic winding system
will now be explained with reference to these
figures.
It is seen that, in the position shown in the
figures, the member 5 for starting the winding
operation is engaged and driven by the pin ‘5
rigidly connected to the cylinder l. The said
pin 6 also entrains the toothed wheel 8 in gear
with the usual clock mechanism, the details of
which have not been illustrated.
In this man
ner, therefore, the normal driving of the clock
mechanism is obtained by the action oi a spring
3S within or otherwise associated with the cylin
der or barrel l, which drives the mechanism:
through the pin t, as has just been explained.
rl‘he pin 6 will therefore effect a rotating move
ment about the axis of the cylinder in the direc
tion indicated by the arrow in Fig. l (anti
clockwise as viewed in the ligure), In the eX
ample illustrated, it has been .assumed that the
said pin travels a complete revolution in one
hour.
The winding member 5, which can rotate freely
about its axis, has two diametricallyfopposed pins 55
2,118,790
2
9 and I0. This arrangement of the pins has been
adopted in order to obtain winding every half
hour.
As a result of the member 5 being en
trained by the pin 6, one of the pins 9, I0 will
engage every half hour with the starting and
stopping lever II;
Assume, as has been illustrated in Fig. 1, that
the pin 9 engages the extremity of the lever II.
When the member 5 is further entrained by the
pin 6, the pin 9 will displace the lever II, which
pivots about the axis I2 and carries along the
pawl I3, the axis I4 of which is rigidly connected
to the said lever II. When the pin 9 has caused
a certain displacement of the lever II, the pawl
I3 leaves the tooth of the ratchet wheel I5 on
which it rested, and falls into the following tooth.
Shortly after this action, the pin 9, continuing
its rotary movement, releases the lever II which,
under the action of the spring 2I, returns to its
initial position. During its return movement, the
lever I I carries along the pawl VI3 which acts on
the ratchet wheel I5, causing an anti-clockwise
rotation of the said wheel corresponding to the
ever, in this case, the extremity of the arm' I1,
which rested in a recess in the cam disc I6, is
lifted onto a projection by the movement of the
said cam disc. Thus, in this case, the displace
ment of the arm I1 lowers the arm I8 to restore
the brushes to the position shown in the Fig. 1.
The brush 23 is disengaged from the commuta
tor 24 and the supply current to the motor is
cut off.
However, owing to its inertia, the rotor 41 will
continue rotating for a short time after the
current is interrupted, which will allow the pin
40 to disengage the extremity of the lever II so
as not to interfere with the succeeding operation
of starting the winding. This additional rota 15
tion of the rotor will also assist in cleaning the
commutator 24, after interruption of the cur
rent, by the action of the brush 22 which is
still in engagement with the commutator.
The succeeding winding operation will be ef
fected under the action of the pin II'I of the
member 5 and stopping will be effected by the
action of the pin 4I of the winding Wheel 38.
The winding wheel 38 is integral with a col
advancement of one tooth.
25
Mounted rigidly on the same axis as the ratchet lar 38’ (shown in Fig. 2 but omitted from Fig. 4
wheel I5 is a cam disc I6, on which bears the for the sake of clearness) to which is connected
extremity of the arm I1 of a double-armed lever one end of the spring 39 arranged in the barrel
I1, I8 fulcrumed at 29. At the extremity of the 1. The other end of the spring 39 is connected
second arm I8 is mounted an insulating member to the barrel 1 so that unwinding of the spring 30
rotates the barrel to advance the pin 6,
30 I9 supporting the two brushes 22 and 23 asso
The method of operation of the device is as>
ciated with the commutator 24 of the rotor 41 of
an electric motor. As shown in Figs. 1 and 2 the follows:
The spring 39 drives the barrel 1 whereby
working ends of the brushes are L-shaped in
cross-section and are arranged so that one edge the pin 6 is advanced to rotate the member 5
and also the toothed wheel 8 which drives the 35
35 of the L is adapted to engage the commutator.
In the position illustrated in Fig. 1, the arm clock mechanism. In this manner the member
5 rotates until either the pin 9 or IU engages
I1 bears against a projection on the cam disc
I6 and only the brush 22 is in engagement with with the starting and stopping lever II. Con
the commutator 24. The supp-ly circuit of the tinued movement of the pin moves the lever
II and the pawl I3 wherebythe pawl engages
'
40 motor is open.
When, as has been explained, the ratchet wheel with the next following tooth of the ratchet
I5 advances by one tooth under the action of wheel I5. Shortly thereafter the pin 9 disen
gages from the end of the lever II whereby the
the pawl I3, the cam disc I6 is also thereby en
trained which causes the extremity of the lever spring 2I returns this lever and the pawl I3
to their initial position thereby advancing the 4.5
arm I1 to enter a recess in the cam disc I5, under
the action of the spring 43. This movement of ratchet wheel forward by one tooth.
The movement of the ratchet wheel simultane
the arm I1 raises the arm I8 pivotally about its
axis 29, causing an upward displacement of the ously advances the cam disc I5, and the end of
brushes 22 and 23, so that the brush 23 comes the arm I1 of the double armed lever I1, I8
into engagement with the commutator 24 and moves into a recess in the cam disc, thereby per
the rotor 41 of the electric motor is started by mitting the spring 46 to rotate the double armed
an electric current, from a supply battery or
equivalent source, flowing through the flexible
conductors 25 and 26 connected to the terminals
The inductive flux necessary for the
operation of the motor is furnished by the mag
net 29 ending in the two pole-pieces 30 and 3I.
It will be noted that the brushes are posi
tioned by sliding them across the commutator,
which has a cleaning action, ensuring good elec
trical contact while preventing the introduction
of additional Contact resistanoes.
During its rotating movement, the rotor 41
drives the toothed Wheel 38 rotatably mounted
on the shaft 59, for winding the spring 39‘,
through the intermediate gear wheels 32 to 31.
On the wheel 38 are mounted two diametrically
opposed pins 40 and 4I. After a period of wind
55 21 and 28.
ing of the spring corresponding to about half
70 an hour of operation of the clock, one of the
pins 40, 4I engages the extremity of the lever
II and causes the advancement of the ratchet
wheel I5 by one tooth, in the same manner as
has been described with reference to the pins
75 9, I0 for starting the winding system. I-Iow
lever I1, I8 and move the brush 23 into engage
ment with the commutator to start the electric
motor. Through the gear wheels 32 to 31 the
winding wheel 38 is rotated to rewind the spring .55
39.
In rotating the winding wheel 38, how
ever, the pins 40, 4I are advanced and one of
them (for example 48) also engages with the
starting and stopping lever II to move the pawl
I3 over the next following tooth of the ratchet
wheel I5. On continued movement of the pin
40 the lever II is released whereby the ratchet
Wheel is again advanced by one tooth. Simulta
neously the cam disc I6 is advanced to move
the lever arm I1 on to a projection thereof 65
whereby the brushes are moved away from the
commutator to stop the rewinding motor.
It is obvious that the member 5 may be given
any desired form and may be provided with any
number of pins for eifecting winding after a defi 70
nite length of time, and the drive of the mecha
nism of the clock by a pin rigidly connected to the
cylinder may be replaced by a toothed-wheel
drive. In addition, it is possible to use fixed
brushes which are constantly in engagement with
2,118,790
the commutator and to feed them through ñxed
contacts on which would be supported movable
contacts actuated by the lever arm I8.
These
and other modifications are possible without de
parting from the ambit of the present invention.
The usual clock mechanism is protected from
the action of the magnet 29 of the electric motor
by a magnetic screen 44.
Although a speciñc embodiment of the inven
10
tion has been described and illustrated, it will be
clearly understood that many modifications and
variations will be apparent to those skilled in the
art which fall within the invention as deñned
in and by the appended claims.
15
We claimr-
_
1. A winding device for a clockwork mechanism
comprising in combination a clockwork mecha
nism, a member driven by the clockwork mecha
nism, at least one pin connected to said member,
20 a starting and stopping lever operated by said pin,
a ratchet wheel having teeth, a pawl associated
with said ratchet wheel, means for displacing
said pawl by the movement of said lever, said lever
being released from said pin when the pawl is
25 moved over a following tooth of the ratchet
Wheel, means for restoring the pawl to its initial
position when released and thereby turning the
ratchet wheel, a cam disc driven by said ratchet
30
wheel, electrical contacts, means operated by
said cam disc when it has been stepped round
3
to close said electrical contacts, an electric. mo
tor controlled by said contacts, means for Wind
ing the clockwork mechanism by said electric
motor, and means driven by said electric motor
for operating the starting and stopping lever
>again after a predetermined time, whereby said
ratchet wheel and cam disc are again stepped
round, and means for opening the electrical con
tacts when the cam disc is in this position.
2. A Winding device for a clockwork mechanism 10
comprising in combination a clockwork mecha
nism, a member driven by the clockwork mecha
nism, a ratchet wheel having teeth, a pawl asso
ciated with said ratchet wheel, means for dis
placing said pawl by the movement of said mem 15
ber, said pawl being released when it is moved
over a following tooth of the ratchet Wheel,
means fo-r restoring the pawl to its initial position
when released and thereby turning the ratchet
wheel, an electric motor, means operated when 20
the ratchet is stepped forward to start said elec
tric motor, means for winding the clockwork
mechanism by said electric motor, means driven
by said electric motor for operating the pawl
again after a predetermined time whereby said 25
ratchet wheel is again stepped round, and means
operated by the ratchet wheel when 'in this posi
tion to stop the electric motor.
'
RAOUL FOUQUES.
JACQUES LENFANT.
30
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