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Патент USA US3032175

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May 1, 1962
w. P. RYAN
Filed April 18, 1960
3 Sheets-Sheet l
May 1, 1962
w. P. RYAN
Filed April 18, 1960
3 Sheets-Sheet 2
May 1, 1962
w. P. RYAN
Filed April 18, 1960
3 Sheets-Sheet 3
Fig.7 6.926
a5 25 23 25 24 24 23
24 2*’5
Unites States Patent @ihee
Patented May 1, W62
FIGURE 5 is a view showing the horizontal selector
drive mechanism;
William P. Ryan, Avon, Conn, assignor to Royal McBee
Corporation, Port Chester, N.Y., a corporation of New
Filed Apr. 18, 1960, Ser. No. 23,979
6 Claims. (Cl. 197-16)
mechanism; and
FIGURE 6 is a view of a type matrix positioning
FIGURE 7 is a layout of the type on the matrix
operable by the positioning mechanism.
Referring now to the drawings wherein like reference
numerals designate like or corresponding parts through
out the several views, there is shown in FIGURE 1 a
This invention relates to mechanism for converting 10 form of a keyboard input device which is disclosed and
digital information into discrete angular movements of a
claimed in application Serial No. 4,749, ?led January 26,
positioning device; more particularly it relates to mecha
1960, and which is adapted to encode up to y characters
nism characterized by a constant input positive drive
in accordance with the relation 31:2!‘ where n is the num
mechanism and by digital code translating apparatus for
ber of digits in the code. Brie?y it comprises a plurality
selecting the magnitude of said constant input to be im 15 of selector bails 11 secured to cross shafts 12. Shafts
parted to the matrix positioning mechanism of a matrix
12 are rotataively mounted between yokes l3 pivotally
printing machine in accordance with codes representative
mounted on cross shafts 14. The bails 11 and shafts
of type on the type matrix of the machine.
12 are adapted to be rotated by bail selection springs 15
Known printing machines incorporating a type matrix
depending from key stems 16. The number of springs
which must be capable of two degrees of motion to posi
depending from each key stem is in accordance with the
tion a type thereon before a printing point employ hori
code representation of the character assigned to said
zontal and vertical selector-drive mechanisms which, by
key. Secured on one end of each of said shafts 12 is a
the addition or subtraction of incremental motions in ac
dog 17 which, when the bail and shaft associated there
cordance with the bits in mechanically generated code
with is rotated, engages an associated notch 18 in a bail
patterns representative of type on the matrix, drive type 25 drive link 19. A power connecting bail 22, operative
matrix positioning mechanisms. Such selector-drive
upon depression of any key by a spring 23 associated
mechanisms are of the well known differential pulley type.
with each key, is similarly secured to a cross shaft 24
In that the operation of such machines is cyclic, i.e. the
rotatably mounted between yokes 25 pivotally mounted
mechanisms must go through a complete cycle in re
on a cross shaft 26. The rearmost end of drive link
sponse to each code pattern, the cycle time is required 30 19 and a roll cam 27 are pivotally mounted on one end
to be short to enable subsequent code patterns to be acted
of the shaft 24. The forward end of the drive link is
upon at normal typing rates. Since the known types of
pivotally connected to a crank arm 28 which in turn
selector mechanisms employ a multiplicity of elements
is pivotally mounted on a shaft 29. The roll cam is
there is imposed, due to system inertia, a limit on the
adapted upon rotation of its bail shaft 24 to engage a
cycle time attainable.
In accordance with the present invention there is pro
vided simple, fast acting, and simultaneously operable,
horizontal and vertical selector mechanisms responsive
to binary digital information representative of characters
on a type matrix for varying the degree of coupling be—
tween a constant input positive drive source and mecha
nisms operative to position the type matrix. In brief,
each selector mechanism comprises a mechanical binary
translator which selects a pivot about which linkage be
tween the constant input drive mechanism and associated
positioning mechanism fulcrums.
continuously driven power roll 31 thereby actuating said
drive link 19 which, through said dogs, drives the bail
support yokes 13 from normal to actuated positions, which
positions represent a zero and a one condition respective
ly. The binary output of the encoder is brought out
through cables 2°, 21, 22, 23, 24, and 25 connected to
the yokes, each cable representing a bit and all the cables
representing a combination of “zero” and “one” bits rep
resentative of the character or characters assigned to the
key depressed.
In that most keys are assigned two characters, i.e. upper
and lower case, shift and shift lock keys 33 and 34 are
Accordingly it is an object of the invention to provide
a simple fast acting mechanism for converting digital in—
formation into discrete angular movements of positioning
adapted upon depression to cam a stud 35 on a crank
arm 36 pivoted on a cross shaft 37 thereby to actuate
a shift bit or 26 cable 38. As is understood in the art
Another object of the invention is in the provision of a
can be encoded to be doubled, i.e. the upper case charac
ter code representation will differ from. the lower case
mechanical binary translator for selectively controlling
the shift bit will permit the number of characters which
the magnitude of drive between a constant input positive
code by a shift bit; thereby enabling the standard type-.
drive mechanism and positioning mechanisms.
Writer keyboard to be encoded.
Another object of the invention is to provide fulcrum
With the exception of the shift cable, all of the output
varying means under control of a mechanical translator
for varying the drive between a positive drive mechanism
and positioning mechanisms.
Other objects and many of the attendant advantages
cables as seen in FIGURES 2 and 3 extend, three on each
side of the machine, through openings provided in a pair
of clutch triggering cranks 40 secured to hubs 41 rota
tively mounted on a cross shaft 42. The hubs 41 carry
of this invention will be readily appreciated as the same 60 a pair of clutch triggering arms 43 connected by a cross
becomes better understood by reference to the following
bar 44. A clutch control arm 45 freely rotatable on
detailed description when considered in connection with
the accompanying drawings in which like reference nu
merals designate like parts throughout the ?gures there
shaft 42, but spring biased against cross bar 44, is adapt
ed upon rotation of arms 43 to be moved clockwise as
viewed in FIGURE 2 by cross bar 44. Movement of
of and wherein:
the clutch triggering crank is effected by balls 46 (FIG
FIGURE 1 is a side elevation of a keyboard encoder;
URE 2) securely mounted on the bit cables whereby
FIGURES 2 and 3 are views of a dog clutch mecha
when any one or more of the cables is actuated the balls
nism operable through the keyboard output instrumental
46 thereon, which are larger in diameter than the pas
sages in the cranks 40 through which the cables pass,
FIGURE 4 is a perspective view showing vertical selec
carries the arms 43 forwardly or to the right as viewed
tor-drive mechanism and horizontal selector mechanism,
the latter in block diagram;
in FIGURE 2, thereby moving the clutch control arm.
As seen in FiGURE 3 the clutch is of the face engag
ing type and comprises a driving member 51 rotatably
tion of which positions the type matrix 68 (FIGURES 6
and 7) in a vertical direction. The cam follower member
89 is pivoted on a shaft 94 secured to the machine frame
and has a pair of arms 95 the ends of which carry rollers
96 associated with earns 97 and 98. The cams 97 and
98 are shaped to drive the cam follower 89 counter
56 and groove 57 arrangement, to a second hub 58 se
clockwise and clockwise respectively each time the cam
cured to shaft 52. A spring 59 wrapped around the hubs
shaft 52 rotates 180°.
and maintained by ?anges 62 on the hubs biases the ?rst
Also secured to the cam shaft 52 are fulcrum lever
hub 54 toward the continuously driven toothed member
51. A pair of lugs 63 spaced 180° apart extend radially 10 reset cams 11,91 and 192 and a code slide reset cam 1113.
Associated with the code slide reset cam 103 is a cam
from hub 54 and are adapted to cooperate with a cam
follower link 104 pivoted intermediate its ends on a shaft
ming surface 65 on the clutch control arm 45 to dis
165 secured to the machine frame. The end of link
engage the hub 54 from the drive member 51. In that
104 removed from the cam is connected to an inter
the lugs 63 are spaced 180° apart, each time the clutch
is engaged the cam shaft 52 may rotate only 180° be 15 mediate link 166, also pivoted to the machine frame and
biased by a spring 107. Link 106 is connected to a
fore lugs 63 disengage hub 54 from drive member 51.
slide 168 mounted on the aligning rods 77 whereby move—
Referring now to FIGURES 4 and 7 the seven bit lines
ment of cam follower link 184 will move the slide 198
are divided into groups of 3 and 4 for controlling move—
forwardly thereby carrying a code slide reset bail 111
ment of vertical and horizontal positioning shafts 66 and
67 to one of six and thirteen positions, respectively, where 20 secured thereto, forwardly. As seen in the ?gures the
code slide reset bail 111 engages shoulders 112 on the
by the type matrix 68 shown in FIGURE 7 may be selec
mounted on a cam shaft 52 and adapted to be continuously
driven by a motor driven belt 53. A hub 54 is provided
with teeth 55 on its end adjacent the driving member.
The hub is also keyed, as by an axially extending tongue
tively positioned. As depicted in FIGURE 7 the matrix
code slides thereby pushing them forwardly against their
is normally in a home position with respect to a printing
station 69; with the type faces arranged thereon in six
spring forces until shoulders 74 are re-engaged by the
crum bail 117 is connected between arms 119.
noses of latches 70. Associated with the fulcrum lever
rows and thirteen columns. The lower case characters 25 reset cams 101 and 102 is a cam follower 113 having
a pair of arms 114 embracing the periphery of cams 1111
on the matrix are disposed in the upper three rows and
and 1632 and having rollers 115 and 116 adapted to en~
the upper case characters in the lower three rows. To
gage ?rst cam 101 and later in a cycle cam 102 whereby
the left of the matrix layout and below are shown bit
a fulcrum lever reset bail 117 is moved to return the
cable combinations from the keyboard which must be
activated to move the matrix from the home position 30 fulcrum levers 81 to set position. This is accomplished
by connecting the fulcrum lever reset cam follower to
shown to any of the six vertical positions and from the
an intermediate link 118 which is connected to rock
home position shown to any one of twelve horizontal
spaced arms 119 pivotally mounted on shaft 82. The ful
positions; six to the left, and six to the right of home
The horizontal selecting mechanism, generally desig
In that the horizontal and vertical selection mechanisms 35
nated 122 in FIGURES 4 and 5, is identical except that,
are substantially identical excépt as will hereinafter be
as seen in FIGURE 5, it comprises four code slides 123
apparent, a detailed description of the vertical selector
and employs twelve interposers 124 associated with twelve
mechanism only will be given. The group of 3 bit cables,
holes 125 in drive link 126. The code slides are adapted
which comprise the 2°, 21 and 25 or shift bit, are each
connected to one end of a latch 70 pivoted on a shaft 40 to be released when latches 1'27 associated with bit cables
71 secured to the machine frame (not shown). The
nose ends 72 of the latches are biased by springs 73 into
22, 23, 24, and 25 are actuated. An additional difference
is that the intermediate link 128 coupling the horizontal
drive cam follower 129 is connected intermediate the
ends of the drive link as at 130 whereby shaft 67 may be
coded slides 75. Springs 73 also operate to return the
bail yokes 13 through the bit cables to zero position. The 45 rotated clockwise or counter clockwise to position the
matrix 68 to either side of home posiiton.
coded slides 75 are provided with elongated slots 76
The mechanism for moving the matrix 68 is shown in
within which are disposed aligning rods 77 secured to the
FIGURE 6 wherein the type matrix 68 takes, in a pre
machine frame. The slides are loaded as by springs 78
ferred embodiment, the form of a segment of a sphere
away from the latches 70 whereby when the latches are
actuated the released slides move one increment. Move 50 with the type faces on the outer spherical surface 13].
thereof. An alternate form for the type matrix may com
ment of the slides, depending on the combination released,
prise a vertical cylinder which will function in the same
aligns predetermined notches 79 therein, thereby provid
manner as the spherical matrix.
ing a discrete channel for the reception of a discrete one
The spherical segment is mounted in such a way that
of six fulcrum levers 81 pivoted on a shaft 82 secured
to the machine frame. In the embodiment disclosed only 55 any point on the type matrix can be brought into printing
latching engagement with shoulders 74 formed in notch
position by rotating the sphere about a pair of orthogonal
six are necessary but up to seven could be accommodated
assuming the all zero code were not used. Levers 81
move toward the slides under the action of springs 83
secured to the fulcrum levers and to the machine frame.
As shown the fulcrum levers 81 are provided on their 60
axes which have their intersection at the center of the
sphere. The type faces on the spherical surface 131 are
?at in a plane perpendicular to a radial line through the
upper ends with pins 84- adapted, when an associated ful
the intersection of a vertical and horizontal equator of
the sphere; these equatorial lines being positioned at cer
crum lever moves into a channel, to enter holes 85 in a
center of the type position. Each type-face position is at
tain angular increments about their respective mutually
drive or motion transmitting link 86.
perpendicular axes.
One end of the vertical drive or motion transmitting
Referring more particularly to FIGURE 6, the spherical
link 86 is pivotally connected as at 87 to the lower end 65
matrix is fastened to a horizontal shaft 132 which is free
of an intermediate link 88 whose upper end is pivotally
to rotate in a Y-shaped yoke 133 whose tubular base
connected to a cam follower member 89. The other end
leg 134 is free to turn in bearings (not shown) in the
of the drive link 86 is pivotally connected as at 90 to
type matrix carriage 135. The type matrix carriage is
the upper end of an intermediate link 91 whose lower
end is pivotally connected to a crank arm 92. The holes 70 mounted in a set of slides (not shown) so that the car~
riage is free to move back and forth horizontally along
85 in drive link 86 are spaced relative to one another
the positioning shafts 66 and 67 to effect letter feed, tabu
and to pivot point 87 such that crank arm 92 can be
lating and carriage return movement. Keyed to the hori
rotated to any one of six equally spaced angular incre
zontal positioning shaft 67 so that it is driven by the shaft
ments depending on the pivot hole selected. The crank
arm 92 is secured to vertical positioning shaft 66, rota 75 but carried along horizontally with the type matrix car
riage is a horizontal positioning bevel gear 140. Bevel
gear 140 is meshed with a bevel gear 141 attached to
the base leg 134 of yoke 133, so that if the horizontal
positioning shaft 67 is caused to turn, the yoke and the
The selection of a letter requiring movement of the
matrix in both directions is similar; with movements in
both directions occurring simultaneously. It is to be ap
preciated that the angle through which, and the direction
spherical matrix are turned about a vertical axis 136.
in which, horizontal position shaft 67 turns depends, re
spectively, on the distance of the selected pivot hole from
its pivotal connection 130 to intermediate link 128 and
Whether the selected pivot hole is to the right or left of
the pivotal connection 130.
tioning gear 143. This gear is meshed with a rack 10
It should be understood that the foregoing disclosure
144 that is attached to a pusher-rod 145, which is essen
relates to only a preferred embodiment of the invention
tially a tube extending up through the center of the base
and that it is intended to cover all changes and modi?
leg 134 of yoke 133. At the top of the pusher-rod a
cations of the example of the invention herein chosen for
rack 146 is pivotally attached as at 147 so that it is free
the purposes of the disclosure, which do not constitute de
to pivot about the vertical axis 136. Rack 146 is meshed
partures from the spirit and scope of the invention.
with a pinion 143 attached intermediate the ends of the
The invention claimed is:
horizontal shaft 132. Thus, if the vertical positioning
1. Apparatus including an output shaft for converting
This, in elfect, is moving a point on the spherical surface
in a horizontal direction. Keyed to the vertical position
ing shaft 66 so that it is driven by the shaft but carried
along horizontally with the carriage 135 is a vertical posi
shaft 66 is caused to turn, the pusher-rod moves ver
it digit code representations into discrete angular move
tically, rotating the spherical matrix about its horizontal
ments of said output shaft comprising a drive shaft
axis, is. the axis of shaft 132 which is, in e?ect, moving 20 adapted to partake of a cyclic movement in response to
a point on the spherical surface in a vertical direction.
said code representations, a motion transmitting mem
ber having up to 2n fulcrum holes, mechanism for rotating
said output shaft, means articulately connecting one end
As before stated depression of a key on the keyboard
. of said motion transmitting member to said mechanism
will pull a combination of bit cables forwardly thereby 25 for rotating said output shaft, means for coupling said
unlatching predetermined ones of the code slides, either
motion transmitting member to said drive shaft whereby
in the vertical selector mechanism alone or in both of
it partakes of a constant amplitude oscillatory motion
the selector mechanisms. This action will bring prede
about said one end during a cycle of said drive shaft, up
termined notches in the code slides into alignment so as
to Zn fulcrum pins adapted for movement into associated
to permit discrete fulcrum levers to enter associated pivot 30 fulcrum holes, means operative in response to said n
holes in drive links. Simultaneously, the balls 46 on the
digit code representations for cycling said drive shaft,
bit cables will effect clutch engagement whereby shaft
and means operative in response to said 11. digit code repre
52 will begin a 180° cycle of rotation. Assuming a lower
sentations for permitting a discrete one of said fulcrum
case “2” is to be printed, the matrix is required, as is
pins to enter an associated fulcrum hole in said motion
evident from FIGURES 6 and 7, to move from home 35 transmitting member whereby said one end partakes of
position clockwise about its horizontal axis 132 one in
an oscillatory motion having an amplitude related to said
crement to position the lower case “e” before the print
constant amplitude oscillatory motion'in accordance with
ing station. No movement is required about vertical axis
the selected fulcrum hole.
136. As indicated in FIGURE 7, the E key is designed
2. Mechanism for converting coded digital representa
when actuated to pull cable 2° thereby releasing slide 75’ 40 tions of information into discrete angular movements of
which will vertically align notches 79 in each slide op
a positioning shaft comprising a normally quiescent driv
posite fulcrum lever 81' only. Cam 101 is so formed
ing member, an oscillatable driven member coupled to
that it engages roller 116 very early in the 180° shaft
said driving member, a lever having a plurality of ful
cycle thereby rocking the cam follower 113 counter clock
crum holes coupled to said driven member, a crank arm
wise, arm 118 downwardly, and arms 119 counter clock 45 for moving said shaft, means pivotally connecting one
wise. This moves rod 117 away from the fulcrum levers
end of said lever with said crank arm, fulcrum setting
whereby lever 81’ will move into opposite aligned notches
means adapted for movement into associated fulcrum
and its pin 84- into pivot hole 85’ in drive link 86.
holes, a plurality of slides selectively movable in re
Shortly thereafter cam 97 rocks follower 89 counter clock
sponse to said digital representations, notches in said slides
wise about shaft 94 pushing intermediate link 88 down
permutably arranged to permit movement of discrete
wardly a short distance which is always the same amount.
ones of said fulcrum setting means into associated holes,
The movement of link 87 causes drive link 86 to pivot
and means responsive to said digital representations for
clockwise about the selected pin 84.
initiating a cycle of said driving member whereby said
In that the angle through which vertical positioning
lever is oscillated about a selected fulcrum setting means.
shaft 66 rotates depends on the distance of the selected 55
3. Mechanism for converting digital representations of
pivot hole from pivotal connection 87, shaft 66 will move
information into discrete coordinate movements of a type
angular increment as a result of the selection of the pivot
matrix having type arranged thereon in coordinate posi~
hole opposite to lever 81’ thereby moving the matrix
tions, comprising coordinate matrix positioning shafts,
clockwise about the axis of shaft 132 one increment;
means for moving each of said shafts, a quiescent driving
positioning “e” before printing station 69. With the 60 member, oscillatable driven members coupled to said
“e” before the printing point further cams (not shown)
driving member, a lever having a plurality of fulcrum
on the cam shaft will actuate a hammer (not shown)
holes coupled to each of said driven members, a group
during the cycle. After printing, cam 98 is designed to
of fulcrum setting means associated with each lever and
restore cam follower 89, links 88, 86 and 91, shaft 66
adapted for movement into associated. fulcrum holes,
and the matrix to home position. Thereafter cams 103 65 means pivotally connecting one end of each of said levers
and 102 respectively act on associated followers to reset
to an associated one of said coordinate matrix position
the code slides and return the fulcrum levers to normal
ing shaft moving means, means responsive to digital rep
positions in manners heretofor described. While the
resentations for initiating a cycle of said driving mem'
matrix is being restored to home position, additional cams
ber, and means simultaneously responsive to said digital
(not shown) effect an escapement of the carriage 135 and 70 representations for selecting a discrete one of said fulcrum
the hammer in a line feed direction. Since no pivot hole
setting means in each group for movement into associated
was selected on the horizontal drive link 126, the motion
fulcrum holes.
of cam 129 would only cause link 126 to rock about
4. A printing machine having a type matrix whereon
pivotal connection 150 (FIGURE 5) and hence transmit
no motion to shaft 67.
type elements are disposed at predetermined coordinate
75 distances from a printing station, mechanism for moving
said matrix simultaneously about coordinate axes to posi
tion predetermined type elements before said printing
station in accordance with code patterns representative
of said elements, said mechanism comprising a ?rst and a
second matrix positioning shaft, means for moving each
of said positioning shafts, a cyclically driven power source,
a pair of levers each having a plurality of fulcrum points,
means for permanently pivotally connecting one end of
lately connecting said motion transmitting members to
associated crank arms, said connections being normally
ineffective to transmit said follower motions to said crank
arms, fulcrum holes in said members, a group of ful
crum pins mounted for movement into associated member
fulcrum holes, code signal translating means normally
disposed in the path of said fulcrum pins, and means re
sponsive to code signals for operating said translating
means, thereby removing the impediment before discrete
each of said levers with an associated shaft moving means,
oscillatable means coupled to said cyclically driven power 10 fulcrum pins in each group, said discrete fulcrum pins be
source for oscillating said levers about said permanent
connections, and means selectively responsive to code pat
ing operative on said connections to effect the transmis
sion of said cam follower motions to said crank arms.
6. A printing machine having a type matrix and a key
board, means operable from said keyboard for generating
said permanent connections are moved through predeter
mined angles in accordance with the fulcrum points se 15 digital code signals representative of a character on said
type matrix, matrix positioning means comprising a mo
tion transmitting lever having a plurality of fulcrum holes,
5. A typewriter having a type matrix whereon type ele
a plurality of fulcrum pins disposed opposite said ful
ments are disposed at predetermined coordinate distances
crum holes, means responsive to said code signals for
from a printing station, mechanism responsive to n digit
permitting the entry of a discrete fulcrum pin into an
binary code signals for moving said matrix simultaneously
associated fulcrum hole, a normally quiescent shaft, means
about coordinate axes to position a selected type element
responsive to said code signals for cycling said normally
before said printing station and return said matrix to a
quiescent shaft, means coupled to said normally quiescent
home position after a printing operation, said mechanism
shaft for oscillating said lever about a discrete fulcrum
comprising a ?rst shaft for positioning said matrix about
pin, and means for coupling the motion of said lever
one coordinate axis, a second shaft for positioning said
about said selected fulcrum pin to said matrix positioning
matrix about its other coordinate axis, a crank arm se
cured to each of said positioning shafts, a normally
quiescent cam shaft, means responsive to code signals
References Cited in the ?le of this patent
for cycling said cam shaft, ?rst and second cam follower
means oscillatable by said cam shaft, means for trans 30
terns for selectively engaging said fulcrum points whereby
mitting the motions of each of said cam follower means
to a motion transmitting member articulately connected
to each of said cam follower means, means for articu
Fuchs _______________ __ Aug. 23, 1939
Buckley _____________ __ June 24, 1941
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