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Патент USA US3030892

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April 24, 1962
G. M. COANET
3,030,882
HIGH SPEED PRINTING MACHINES
Filed Sept. 28, 1959
mm
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tates Patent 0 ’
1
3,03?,882 '
Patented Apr.,24, 1962 ‘
2
which accurately controls the instant of actuation of the
3,030,882
HIGH SPEED PRINTING MACHINES
Guy Michel Coanet, 21 Blvd. Magenta, Paris, France
Filed Sept. 28, 1959, Ser. No. 842,841
Claims priority, application France Oct. 8, 1958
9 Claims. (Cl. 101-93)
This invention relates to improvements in printing ma
printing members under spring in?uence.
For a better understanding of the invention and to.
show how it may be carried into effect, the same will now
be described with reference to the single FIGURE of the
accompanying drawing which shows diagrammatically and
by way of example the main members of the printing
mechanism of a printing machine embodying the inven
tion.
,
chines of the kind having continuously rotatable type
The drawing shows a machine in which printing mecha
wheels, called “?ywheel” machines, which are employed 10 nisms adapted to print simultaneously on a common line
in accounting or statistical machine equipment and in high
speed calculators or like machines.
are disposed side-by-side in two rows, one row on each
side of a plane X-Y extending through the axis of rota
tion A of a type drum 1. One mechanism is provided
or sets of wheels each bearing a complete set of engraved
characters or signs are keyed side-by-side on a common 15 for each wheel. Since these mechanisms are identical,
only one of them will be described. Each mechanism
shaft to form a cylinder known as a “type drum” or
is mounted on a support plate 2, the said plates being
“printing drum.” During the operation of the machine,
secured by appropriate means to support bars 3 and '4
this drum is actuated with a continuous rotational move
ment generally at one revolution per machine cycle, in 20 fast with the frame of the machine. Bars 62, 63 and
64 formed with slots serve to locate the support plates’
front of one or more paper sheets or tapes which, under
of
the mechanism on the bars. Appropriately disposed
the action of striker hammers selectively actuated in the
between the type drum and the printing mechanism are
course of a machine cycle, receive on one line the im
one or-more paper sheets 65 with one or more carbon
pression of characters or signs corresponding to data to
sheets or ribbons 66 or other means adapted for the print
be recorded during that cycle. In some models of the
known machines, the actuation of the striking members 25 ing. Mechanisms, which are not described because they
do not form part of the invention, are provided to posi
of each printing mechanism is controlled by a triggering
tion
and advance the paper in the machine in the course
device driven by a mechanical or electrical pulse supplied
of the successive cycles.
at a precise instant in the course of a cycle, depending
The type drum 1 is divided along its periphery into 90
upon the character to be printed, by a control or decod 30
equal parts, of which 60 disposed over an angle or are
ing device. The actuation of the triggering device has
entirely or partially provided with engraved characters
the effect of bringing a member of the striker mechanism
or signs for the printing. The other 30 parts correspond
into the space between two consecutive teeth of a toothed
ing to the angle 13 bear no engraved signs. The type
wheel called a “clock wheel,” which rotates with a con
drum
turns at the rate of one revolution per cycle. Each
tinuous movement in synchronism with the rotational 35
row of printing mechanisms is disposed along a toothed
movement of the printing drum. One tooth of the wheel
cylinder 5 forming a “clock wheel."- The illustrated
then supplies to an actuating member a mechanical pulse
In cyclically operating machines of this kind, wheels
clock wheel is provided along its periphery with ninev
which actuates a striker hammer for printing a predeter
teeth 60 and rotates in synchronism with the type drum
mined character. Machines of this kind have been de
scribed, in United States patent speci?cations No. 40 1 at the rate of 10 revolutions per cycle, the interval be
tween two successive teeth of the clock wheel correspond
2,053,063, applied for on May 18, 1934, and No.
ing to the location of a character on the printing .drum.
2,244,242, applied for on April 27, 1938. Machines
An electromagnet 6 is ?xed on an adjustment plate ‘7.
provided with mechanisms designed in accordance with
The said adjustment plate is ?xed to the plate 2 by a screw
these principles can'satisfactorily etfect the printing of
characters at speeds which can reach 200 printed lines 45 67 forming a pivot. An aperture 68 is formed in the
plate 7 to enable the position of this plate on the plate
per minute, but at printing speeds of the order of 300
2 to be adjusted and a screw 69 is provided to lock the
lines per minute and more, it sometimes happens that
plate 7 in the chosen position. In addition, the plate ‘I
these machines cannot ensure correct alignment of the
is guided in a slot formed in a member 70 ?xed on the
characters printed on one line after having been in opera
tion for some time. This is due above all to the fact 50 plate 2. The object of this adjustment will hereinafter
be explained. The electromagnet 6 is provided with a
that, at high speeds, the surfaces of the teeth of the
movable blade 8 which is constantly pushed by a spring
clock wheel and of the members which, in each mechan
ism, have‘ to transmit the striking force to the hammer
9 towards the arm 10 of a control lever 11 provided
with three arms and which is adapted to pivot about a
and to control the instant of the said striking, become
irregularly worn. Moreover, the de?ection of some of 55 pin 12 fast with the adjustment plate 7. The arm 10 is
provided with a shoulder 13 which normally bears on
the members varies appreciably in the course of the
the end of the armature or blade 8 of the clcctromagnet
operation, depending upon the number of characters
6 under the actionof a spring 14 engaged, on the one
hand, with a second arm 15 of the lever 11 and, on the
rebounding and vibration of members cause considerable 60 other hand, with a point 16 fixed on the plate 7. The
third arm 17 of the control lever 11 is formed with an
disturbances in the operation of the said mechanisms.
aperture 18 and a boss 19. When the electromagnet 6
The present invention relates to improvements which
have the object of overcoming these disadvantages and , has been energised and the movable blade 8 haslbeen
which are simultaneously printed on oneline by printing
mechanisms of the machine. In addition, at high speeds,
attracted towards the yoke 20 of the said electromagnet,
of making possible an economic ‘construction of high
endurance printing machines which can operate at high 65 the lever 11, which is adapted to rotate clockwise about
the pin 12 under the action of the spring 14, is stopped!
speeds under good conditions. For this purpose, mem
by
an abutment 21, against which the arm 10 bears. The
ber called “dynamic abutments" are provided to eliminate
said
abutment 21 is fast with a lever 22 which is adapted
rebounding and vibration of mechanical parts which con
trol the triggering instant of members actuated for the
is
to eccentric
pivot about
in arelation
pin ?xed
to on
the the
abutment
plate 7. 21The
in,' order
said pin
to
printing. Means are provided to minimise the mechani 70
cal energy supplied by a_“clock wheel" to latching means
enable the position of the said abutment to be accurately
adjusted by pivoting the said lever. A screw ‘43 displace
8,030,882
3
4
able in a groove 71 in the plate 7 enables the lever 22
and the abutment 21 to be locked in a chosen position
which determines the position of the boss 19 of the arm
17 when the arm 10'of the member 11 is applied against
the said abutment. Pivotally mounted on the pin 12 is
shown) to a connecting plug 60, which is ?xed to the
a member 23 called a “dynamic abutment.”
print hammers in the course of one cycle, that is to say,
This mem
plate 2 and which enables the connections to the electric
circuit of the machine to be established. Whilev that por
tion of the type drum which corresponds to the angle {3
and which is not provided with characters travels past the
outside the time during which a printing can take place,
a re-cocking bar 61 is temporarily displaced to the left.
described, any possible rebound of the member 11 against
the ?xed abutment 21. A spring 24 normally applies the
In this movement, the said bar pushes the arm 41 of the
member 23 against the ?xed abutment 21. The said 10 striking lever 36 of each of the mechanisms which have
been actuated in the course of the preceding cycle and
member is provided with a projecting portion 25 so ar
returns the end of the arm 35 of the said lever against
ranged that, when the arm 10 is brought against the abut
the shoulder 34 of the arm 33 of the release lever 26.
ment 21 by the spring 14, the said arm ?rst abuts the
The printing mechanism operates as follows:
portion 25 of the dynamic abutment 23, which is forced
When the machine is in operation, the type drum 1
back, whereafter the arm bears without rebound against 15
makes one revolution per cycle at the rate of 300 revolu
the ?xed abutment 21. A release lever 26 provided with
tions per minute in front of the striker hammer 42
three arms is adapted to pivot about a pin 27 ?xed on the
and the toothed cylinder 5 (clock wheel) turns at the
support plate 2. The arm 28 of the lever 26 is provided
rate of 3,000 revolutions per minute in front of the boss
with a pin 29 engaged in the aperture 18 in the arm 17.
Engaged with a second arm 30 of the lever 26 is one 20 19 of the arm 17 of the member 11. The printing
mechanism is cocked, that is to say, the shoulder 13 of
end of a spring 31, whose other end is engaged with
ber has the object of preventing, in a manner hereinafter
A third arm 33
the arm 10 of the control lever 11 is engaged on the
on the lever 26 is provided with a shoulder 34, against
end of the blade 8 of the electromagnet and the end
of the arm 35 of the striking lever 36 is engaged on the
a ?xed point 32 fast with the plate 2.
which there can bear the end of the arm 35 of a striking
lever 36. The lever 36 is pivotally mounted on a pin
shoulder 34 of the arm 33 of the release lever 26 in the
37 fast with the support plate 2. Engaged with the end
position illustrated in the drawing. For printing a given
of a second arm 38 on the lever 36 is one end of a
character, an electric current pulse is sent into the wind
ing of the electromagnet 6 at a predetermined instant of
spring 39, the other end of which is engaged with a
the cycle of the machine, depending upon the characters
lever 40. A third arm 41 of the lever 36, called the
striking arm, provides a bearing surface for a print 30 to be printed. The blade 8 attracted by the electro
magnet is disengaged from the shoulder 13 of the arm
hammer 42 which is adapted to slide in a support 44.
10 of the control lever 11, which pivots under the action
of the spring 14, and the arm 10 strikes against the
portion 25 of the dynamic abutment 23, which it pushes
mines the striking force of the hammer 42. This force
must be adjustable at will simultaneously for all the 35 back and to which it transmits by shock the kinetic energy
of the lever 11, whereafter the said arm again bears
printing mechanisms of the machine, depending upon
against the ?xed member 21 without rebound. The
whether the printing is effected on only one paper sheet
The hammer is normally urged against the striking arm
41 by a spring 45. The tension of the spring 39 deter
or on a number of paper sheets between which are in
movement of the lever 11 locates the boss 19 of the arm
17 in the path of the teeth 60 of the clock wheel 5.
pose, the lever 40, with which the spring 39 is engaged, 40 These teeth have at their forward end, as seen in the
serted sheets of carbon paper or the like.
For this pur
is pivotally mounted on a pin 46 ?xed on the plate 2. A
second lever 47, which is adapted to pivot about the pin
direction of their movement, an inclined ?ank and the
instant when the boss 19 comes into contact with the
?ank of a tooth is determined by the position of the
boss 19 in the path of the said teeth. Consequently,
tically adjusted by rotation of an eccentric shaft 50. The
levers 40 and 47 can be brought into any predetermined 45 the adjustment of the position of the abutment 21 on
which the arm 10 of the lever 11 bears determines the
angular position in relation to one another and locked
instant when the boss 19 is struck by a tooth of the
by means of a screw 48. The angular position of the
clock wheel. At this instant, the said boss is driven
said levers determines the initial tension of the striking
upwards by the tooth of the clock wheel. The pin 29
spring 39.
Mounted on the pin 37 hearing the striking lever 36 is a 50 of the arm 28 of the member 26, which is engaged in
the aperture 18 in the arm 17, is driven in this move
member 51 called, like the member 23, a “dynamic abut
ment, whereby the release lever 26 is pivoted and the
ment." This member is provided with an arm 52 which
arm 35 of the striking lever 36 is disengaged from the
is constrained to turn anti-clockwise by a spring 53. A
46, bears on a bar 49, the position of which can be ver
shoulder 34 of the arm 33. Under the action of the
forms an abutment. When, at the instant of the print 55 spring 39, the lever 36 rocks and transmits a mechani
cal pulse through the arm 41 to the print hammer 42,
ing, the arm 35 of the striking lever 36 is released by
which is projected towards the type drum so as to print
the shoulder 34 of the arm 33, as will hereinafter be
on the paper the character which is at that instant
described, it ?rst abuts the portion 56 of the dynamic
travelling past the printing position. The arm 35 then
abutment to which the kinetic energy of the member 36 is
abuts the portion 56 of the dynamic abutment 51, which
60
transmitted by shock, whereaftcr the arm 35 bears With
is forced back and pivots about its pin 37. The arm
out rebound against a ?xed abutment 55. The arm 52
35 then bears against the ?xed abutment 55 without re
of the member 51, which consists of magnetic material,
bound,
the action of the spring 39 being preponderant
is normally applied against the cores or yoke of an elec
over the action of the spring 53. The dynamic abut
tromagnet 57 by the spring 53 and closes the magnetic
circuit of the said electromagnet. A winding 58 of one 65 ment 51 is provided to prevent rebounding of the lever
36 on the abutment 55, since immediately after the‘ print
of the said cores of the said electromagnet has ?owing
ing the hammer 42 is returned against the arm 41, on
therethrough a direct current which establishes a per
the one hand by rebound after the printing, and on the
manent magnetic ?eld in the magnetic circuit. When, as
other hand by the spring 45. If, at this instant, the arm 41
a result of movement of the. arm 52 at the instant of
is in a state of vibration owing to the rebound of the arm
70
striking, the ?eld in the magnetic circuit of the electro
second arm 54 is provided with an extension 56 which
magnet is varied. a winding 59 on the other core of the
35 on the abutment 55, the hammer could be thrown back
towards the drum and produce an undesired impression.
Moreover, at the instant of the striking. the arm 52 of the
electromagnet supplies an induced electric pulse. The
electric circuits of the windings which are incorporated
member 51, which is normally applied against the cores
in a printing mechanism are connected by links (not 76 of the electromagnet 57 by the spring 53, is, removed
3,030,882
from the said cores by the shock of the arm 35 against the
portion 56 and produces a variation of the magnetic ?eld
in the magnetic circuit of the said electromagnet. This
variation of the magnetic ?eld induces in the winding 59
an electric pulse which can be transmitted to a circuit de—
signed to control the performance of the striking. When
a printing has just been effected, the arm 35 of the striking
lever 36 is maintained by the spring 39 against the abut
ment 35 and maintains the arm 33 of the release lever 26
6
to impel said hammer agaist one of said type elements to
effect printing under action of said spring, a releasing
lever having two arms, one arm being ‘adapted normally
to latch said striking lever into inoperative position, and
a control mechanism comprising: a toothed cylinder hav
ing evenly spaced teeth and moving in synchronism with
said type drum at a greater angular velocity, a spring
urged control lever, said lever having an arm vwith a boss
and with pin and slot connection to the second arm of said
in the lowered position. 0n the other hand, the pin' 29 10 releasing lever, and actuating means ‘for causing pivotal
of the arm 28 maintains the arm 17 of the control lever 11
in the raised position and the arm 10 in the lowered po
sition. When the cnergisation of the electromagnet 6
movement of the control lever at a selected instant to
thereby move the boss on the said control lever into the
path of the teeth on said toothed cylinder, thus causing
ceases, the blade d falls back in front of the shoulder 13
the release of said striking lever when one of said teeth
of the arm 10. Thereafter the re-cocking bar 61, which 15 engages said boss.
is temporarily displaced to the left after each printing
2. Printing mechanism as de?ned in claim 1, further
cycle, then returns the end of the arm 35 of the lever 36
including abutment means, said means comprising a ?xed
against the shoulder 34 of the arm 33 of the lever 26, the
stop member located near a second arm of said striking
pin 29 is lowered and the shoulder 13 is returned against
lever so as to arrest the latter near the end 'of its striking
the blade 8. It is obvious that if, at the instant of the 20 movement, and an elastic abutment lever with two arms.
energisation of theelectromagnct 6, the arm 10 of the
one arm being adapted to cooperate with the second arm
lever 111, which is disengaged, rebounded one or more
of said striking lever and the mass of said abutment lever
times on the abutment 21 before coming to a standstill,
partially absorbing the kinetic energy of said striking lever.
the position of the boss 19 and consequently the instant
3. Printing mechanism as de?ned in claim 2, ‘wherein
when the latter is struck by the flank of a tooth of the 25 is provided an electro-magnet with a yoke and a coil wind
clock wheel would be ill-de?ned and would be subject to
ing, the armature of said electro-magnet being formed by
differences in the course of successive cycles, which would
the second arm of said elastic abutment lever, and the
result in bad alignment of the characters on the printing
magnetic circuit of said electro-magnet being modi?ed
lines. It will be noted that the time between the travel of
when said striking lever drives said abutment lever, there
two successive teeth of the clock wheel past the boss 19, 30 by causing an electric pulse to be generated by said wind~
in the described example, is 2.2 milliseconds and the time
mg.
'
between the instant when the arm 17 is lowered and the
4. Printing mechanism as de?ned‘in claim 1, further
instant when the boss 19 is struck by a tooth is shorter
including abutment means, said means comprising a ?xed
than this period. It is therefore sut‘?cient, under these
stop member located near another arm of said control
conditions, for the dynamic abutment 23 to fall back on 35 lever so as to limit the movement of said lever when its
to the abutment Zll more than 2 milliseconds after the
boss is .set into said path, and an elastic abutment lever
triggering of the arm 10 by the energisation of the electro
adapted to cooperate with said other arm of said control
magnet 6, in order that the falling back of the abutment
lever, and the mass of said abutment lever being chosen to
may have no e?ect on the arm 10, which has been re
partially absorb the kinetic energy of said control lever.
moved from the abutment 21 by the rebound of the boss 40 5. In a cyclically operated printing mechanism includ
‘19 on a tooth of the clock wheel. Another adjustment
ing a continuously rotating type drum having at its periph
has been provided to permit‘perfect alignment of the
ery lines of type characters arranged in columns and a
printed characters on a‘ line during operation of the
toothed cylinder having a number of longitudinal teeth and
machine. For this purpose, the plate 7, on which the
synchronously rotating at an angular velocity greater than
electromagnet 6 and a portion of the triggering mecha 45 that of said drum, a printing element associated to a
nism are mounted, can be pivoted about the pivot screw
column of said type characters, said element comprising
67 when the screw 69 is released, by raising or lowering
a support plate mounted perpendicular to the axis of said
a lug 72. By’ this movement, the boss 19 of the arm 17
drum, a printing hammer, a multi-arm striking lever hav—
of the control lever'lll is displaced in the forward or
ing a ?rst arm end disposed to touch an end of said ham
rearward direction in relation 'to the direction of rotation 50 mer and a second arm, a ?rst spring attached to'said second
of the clock wheel, whereby it is possible to advance or
arm for impelling said striking lever against said hammer.
retardthe instant when the boss 19 encounters a tooth of
?rst
latching means adapted to latch said striking lever in
the said clock wheel.v A recess 73 formed in the plates 7
inoperative position against the action of said spring, said
and 2 visually indicates the relative position of the two
striking lever and latching means being each pivotally'
mounted on said support plate; a spring-urged control lever
By reason of the fact that all the triggering members of a
having an arm which bears a boss and is coupled with a
printing mechanism are mounted on one support plate 2,
part of said latching means; a second latching means
as described in the present embodiment, pre-set mechan
adapted normally to maintain the boss of said control lever
isms can be instantaneously interchanged.
'
out
of the path of the teeth of said cylinder, said second
The described device has been assumed to be controlled 60 latching means being operated by a timed impulse to un
- by an electric decoding device which, for printing a
lock said control lever, whereby the boss on the latter
character or sign, sends an electric triggering pulse into
?rst
is set into said path -to encounter thereafter the ?ank
an electromagnet at a given instant. It is obvious that a
of such a tooth, so that said ?rst latching means releases
printing mechanism designed in accordance with the inven
said striking lever.
tion may equally well be triggered in a similar manner by 65
6. Printing element as de?ned in claim 5, further in
a mechanical decoding device controlled, for example,
cluding abutment means ?xed on said support plate, said
by devices for scanning record ‘cards or tapes or other
means comprising a ?xed stop member located near a
devices, and any modi?cations may be made to the form
third arm of said striking lever so as to arrest the-latter
and the arrangement of the described parts without depart
near the end of its striking movement, and an elastic abut
ing from the scope of the invention.
70 ment lever with two arms, one arm being adapted to co
What is claimed is:
operate also with the third arm of said striking lever and
1. Cyclically operated printing mechanism including: a
the mass of said abutment lever partially absorbing the
typedrum having a plurality of type elements thereon con
kinetic energy of said striking lever.
'
tinuously moving through printing position, a printing
7. Printing element as de?ned in claim 6, wherein is‘
hammer, a spring-urged striking lever with an arm adapted 75 provided an electro-magnet with a yoke and a coil winding,
plates.
'
r
‘
3,030,882
the armature of said electro-magnet being formed by the
means comprising a ?xed stop member located near the
second arm of said elastic abutment lever, and the mag
other arm of said control lever so as to limit the move
netic circuit of said electro-magnet being modi?ed when
said striking lever drives said abutment lever, thereby caus
ing an electric pulse to be generated by said winding.
8. Printing element as de?ned in claim 5, wherein said
second latching means comprises an electro-magnet whose
armature is adapted to latch another arm of said control
lever, said element further including an adjusting plate
ment of said lever when its boss is set into said path, and
an elastic abutment lever adapted to cooperate with said
other arm of said control lever, and the mass of said abut
ment lever partially absorbing the kinetic energy of said
control lever.
pivotally mounted at one point on said support plate, means
to secure said electro-magnet onto said adjusting plate,
a pin for pivotal mounting of said control lever on said
adjusting plate and locking means, the arrangement being
disposed to permit manual adjustment of the angular posi
tion of said pin with respect to said toothed cylinder, and 15
then locking of said adjustment plate fast with said sup
port plate.
9. Printing element as de?ned in claim 8, further in
cluding abutment means ?xed on said adjusting plate, said
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,013,533
Buhler ______________ __.- Sept. 3, 1935
2,030,427
2,227,143
2,627,807
2,766,686
2,895,411
2,897,752
Buhler ______________ __ Feb. 11,
Knutsen ____________ __ Dec. 31,
Buhler ______________ __ Feb. 10,
Fomenko ____________ __ Oct. 16,
Demer ______________ .._ July 21,
Malmros _____________ __ Aug. 4,
1936
1940
1953
I956
1959
1959
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