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Патент USA US2405173

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Aug. 6, 1946.¿
J. ZENNER
' '
,4,W
APROJECTQÍR FOR PAGE PRINTERS
»Filed July 17. 1940
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PROJECTOR FORA PAGE PRINTERS
Filed July l’T, 1940
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l WALTER
J. ZENNER
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4PROJEFJ‘IL’OR FOR PAG-E PRINTERS
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Filed July 17', 1940
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INVENTOR.
WALTER .1. ZENNER.
BY
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PROJECTOR Fon PAGE PRINTERS
Filed ¿um 17, 1940
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INVENTOR,
WALTER J.' ZENNER
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Àug. 6, i946,
w. J. ZENNER
PROJECTOR FOR PAGE PRINTERSFiled July 1'?,v 1940
2,495,173
7 sheets-¿Sheet s
INVENTOR.
WALTER -J. ZENNER
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PROJECTOR FOR PAGE PRINTERS
Filed Jul;r 17. 1340
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1NVENTOR,
,-
BY
WALTER .1. zENNx-:R
Patented Aug. 6, i946
2,405,173
UNITED STATES » PATENT OFFICE
Waiter J. zeur-ier, Des Plaines, nl., a‘ssiinio'r> to
'l‘eletyllßy Corporation, Chicago,
Ill., a corpora
tion of Delaware
Application July 1'7, 1940, seria-IN1). 346,004
i
s claims. (c1. zie-§24)
2
The present invention pertains to printing tele
.
phane web is permitted te escape from the sup
graph projection systems and apparatus and more
ply roll in a stëp-by-step manner, nevertheless
said web is maintained taut between the,web
withdrawing or supply roller and the web take-up
particularly to combination page printers and
projectors for displaying on a screen or inspec
tion area information in enlarged characters.
The primary object oi the invention is to pro
vide an efficient and reliable projection system
mechanism. Y The latter mechanism comprises a
paper or web pulling device whereby the web'is
pulled past the printing point and through the
for displaying on a screen telegraphically re
projection field after the printing of a line.
'
È’urther features of the invention reside in
Another object of the invention is to provide 10
providing a lamp housing having a baille plate
a printer-projector in which the parts of theV
ceived message matter.
cooling means utilizing convection currents of air
between the outer casing‘and the bane plate; a
disc platen movable with the type carriage where
in printing -isl effected on the peripheryy of the
receiving printer are arranged and constructed
to facilitate the projection and display of printed
matter resulting from operation of a printing
telegraph receiver.
ì
disc and the number vof hidden printed charac
ters is reduced to a minimum; and three-point
mounting of the large or upper reflecting mir
ror to eliminate the possibility of injury to the
According to the present invention a projection
system has been provided which embodies a page
printer, of the type shown in U. S. Patent No.
1,904,164, designed to give upon a screen a run
mirror due to twisting action.
.
ning account of received message matter, through
The foregoing and other objects and features
the instrumentality of an optical system com 20
of the invention will appear from the following
prising an arrangement of inclined mirrors so
detailed description taken in conjunction with
that the printer and lamp housing may be 1o
the _accompanying drawings, in which,
cated at the lower part of a suitable cabinet,
Fig. l is 'a perspective view_of the projection
and the screen formed as a part of theA upper
forward wall of the cabinet and positioned above 25 cabinet with a part of the Wall broken away to
the printer compartment.
show schematically the optical and projection
`
system ;
Speciñcally, the page printer is mounted on
rails supported in a structural frame to which
is pivotally mounted the lamp housing, in >such
manner that the lamp housing with its condens
1
.
'
Fig. 2- is a cross-sectional view of therprinter
projector according to the present invention;
j
30 y Fig. 3 is a 'fragmentary' perspective view show
ing the manner> of attaching the'screen to the
ing lenses is positionable so as to embrace within
cabinetj
y
l
the field of projection the last line of printing,
F’ig~ 4 is a detail cross-sectional lview> of the
and also to include eight or ten printed lines».
Printing is effected on a cellophane strip and the 35. large reñe'cting mirror;
Fig. 5 isan enlarged sectional view taken on
image of the record produced thereon is pro
line 5--5 ofF'îS. 2;
jected through the optical system onto the screen.
Fig.. 6 is an enlarged side view and partial
The cellophane web or strip is drawn upwardly
`section of the printer mechanism and associ
through the projection ñeld. rIfhe characters on
ated lamp housing and part of the optical ar
the section of the web in the projection ñeld are
so arranged as to form horizontal lines one above
the other, and the images of said horizontal lines
of characters are projected on the screen. The
horizontal lines of images on the screen moveup
wardly across the screen similar to the movement
of the web through the projection field.
The lamp housing together with the condens
ing lenses is swingable upwardly about its piv
otal articulation with the structural frame to
permit ready access to the page printer.
The
frame is movable on rails so that the entire struc
ture including the printer and lamp vhousing
may be rolled outwardly to permit withdrawal
and thusy render the apparatus carried by said
frame accessible for servicing.
A featurev of the arrangement according to the
present invention resides in the means for case
40
rangement;
j
Fig. 7 is a plan view of the lamp housing and
len‘s` support taken on line 1;'1 of Fig. 2;
Fig». 8 is a plan View of the printer-projector
apparatus;
.I
i'
Fig. 9’k is' an eievauonn view of the printer
projectorv apparatùsi
Fig. v10 is an enlarged cross-sectional view'- of
thev printer platen and platen frame;
Fig.A 11 is a View taken substantially on line
H_il ofi-iig. 10;
v
Fig. 12 iSn a" top' 'View of the part òf the printer
mechanism s'hoilv'nn in Figs. 10`and 11;
Fig. 13 is a perspective view of the shift control
mechanism for the _projection ñeld;
Y
Fig. 14 is an enlargedV cross-sectional view of
>the connection between the platen frame andthe
shifting the cellophane web in the projection
shift control mechanism for the projection field;
field to control accurately the shifting move
ment of the printed record. Although the cello 60 Fig.y 15 is an elevational view of the stere
opticon sllde- carrier of the present invention;
2,405,173
4
‘E
o
enlarged mounting holes for plates 45, by the
Fig. 16 is a side view, partly in section, of the
slide carrier shownin Fig. 15;
Fig. 11 is an enlarged lside
outer casing _21 of the lamp housing I1.
@In the embodiment of the invention shown in
essere type; par'
the drawings, a condensing lens system I8, com
prising two plano-convex lenses and one con
veXo-convex lens, is provided, these lenses being
. suitably clamped by clamps 44 (Fig. 7) to plates
head; and
Fig. 18 is a sectional View taken on line I8-I8~_¿..
of Fig. 9.
Having reference to the drawings in which like '
reference
characters
28, 46 and 41 which are appropriately separated
by spacing posts 50 and 5I. Plate 41 is secured
alongpits top edge to a crossbar 48 (Fig. 2) of
indicate , similar ,_ parts ì, .
throughout the several viewsjthe combination,v
page printing and projecting'apparatus accord
frame 26. Plates 28, 46 and 41 are suitably aper
ing .to the present invention is housed in a cabi
‘ tured `to provide a held of projection of such
area as to present upon the screen i3 (Fig.v l) a
net, indicated generally by theV numeral: vI I,
which is provided in the lower portion .thereof j
predetermined number of lines of printing pro
with a door I2, and in the upper portion with 'a
duced on the record strip or web 49 of transpar
translucent projector screen I3. Secured to the
floor of cabinet II are'twofangle iron rails I4
ent material.
the present invention includes a mirror I9 and
an objective lens 2I. The optical system also
includes a mirror 5I (Fig. l) supported in the
ports the page printing apparatus, indicated gen
erally ‘by the numeral I6, the lamp housing I1,
upper part of the cabinet II, and through this
system the image is projected upon the screen I 3.
The mirror I9 is adjustably pivoted on a pair of
standards 52 by means of which its angular po
sition may be determined. Moreover, standards
andthe voptical arrangement represented gen
erally by condensing lenses I8, small mirror I9
and objective lens V2I. tWheels 22 are journaled
to .thebottom side members of the vframe I5 and
„co-operate in rolling relation with rails I4„which
are ‘provided with indentations 23 into Vwhich
the wheels 22 are admitted when the frame I5,
52 are adjustably mounted on brackets 53 se
cured to frame I5. The objective lens 2 I is >adapt
ed to be -adjustably clamped by a clamping band
54 which is supported on a U-shaped bracket 56,
in 'assuming its fully inserted position in the cabi
net I I, rests upon spacing ‘bosses 25.` In the fully
inserted position, the framelä` is anchored by
'
As previously mentioned, the optical system of
(onlycne of which is shown in Fig. l) which pro
vide a track for the frame I5 (Fig. 2)V which sup
30
means of ,bolts 30 to the base vof the cabinet- I l.
With this arrangement, the frame is easily in
sertable in the cabineti‘fI‘I by'means of rollers
which in turn is secured to a crossbar 51 on
frame l5. Thus, the adjustable mountings pro
vided for the mirror I9 and the objective lens
2I facilitate the proper positionment of the image
on the screen.
22, and moreover _is’adapt'edvwhen the proper
Mirror 5I is supported at three points to mini
mize, or even eliminate the possibility of injury to
position has been’assumedgfto rest> upon bosses
25,'and then toV be anchored tó'the 'ì cabinet II
the mirror due to a twisting action. Mirror 5I is
by the bolts 36 (Figs;2 and 5)."> ‘
secured to the cabinet I I through the instrumen
tality of a bracket 58 located centrally of the bot
tom edge of the mirror~ At each of the upper
" `»
At each side of frame I5 and disposed at the
'rear thereofv are pivot supports'24 for a U-shaped
frame' 26 (Fig.’7) which carries the'lamp‘hous'
corners offmirror 5I is provided a bracket 59 by
means of which the mirror is secured to the roof
of cabinet I I. Mirror 5I is in the form of a regu
„ ing I1 and condenser lenses I8.- "A bar 20 (Fig.
6) is pivoted to frame 26 and the lower’jen‘d of
K said b_ar is provided with a ‘hook portion >'(not
shown) wby which, when Vtheframe 26 is swung
Y upwardly about pivots 24 `to facilitate removal o_f
the printer for servicing, the bar is held ins-its
upward position by the engagement ofsaid
45
lartrapezoid, with the shorter of the parallel sides
positioned' contiguous to bracket 58. The trape
zoidal shape of the mirror 5I conforms to the
effective shape of the ñeld of projection at the
angleat which Vmirror 5i is placed in cabinet Il.
~ hooked portion with a spacer stud 40 (Fig. 8),
Mirror 5I, so shaped, produces a rectangular vis
in a well-known manner, the bar 26 thus ‘serving 50 ual field or iìeld of projection on screen I3, which
as a brace or support. The lamp housing vI1 com
accordingly is of rectangular conformation.
prises an outer casing 21 (Figs.- 2 -and '7) ‘which
Mirror 5I is mounted in -a shock-proof frame
is secured to a plate 28 fastened to a crossbar 23
' substantially as shown in Fig. 4. In the present
of the frame 26. vContained within the lamp
embodiment, the mirror frame comprises angle i
housing l1 and suitably spaced from the outer
iron sides 6I suitably secured at the corners of the
55
casing 21 thereof is a baille plate 3l which rests
frame, and- the-mirror 5I is laid in this frame
'upon the bottom of Vthe housing I1 and’extends
-uponfeltstrips 62 interposed between the mirror
tothe
top,
as
illus
, upwardly’to `a point close
and the angle iron. A layer of mastic (or other
trated in Fig. 2, The bottomlof the housing I1
nonhardening) cement 63, which has the proper
is provided, between the outer casing 21. and the
60 ties of adhesiveness, is spread evenly over the
baffle plate V3|, with apertures 32. This construc
tion permits the ilow of convection currents be
plate 3I
ltween the outer casing 21 and the,I1baille
is provided
for cooling purposes. Housing
mirror 5I upon which is laid a metal backing
plate 64, The felt strip 62, mirror 5I, mastic ce
ment 63, and metal plate 64 are appropriately
clamped together by means of strips of angularly
, with a cover 33 having a grilled -section 34 cov
65 shaped clamps 66 secured by screws 61 to frame
ered by a meshing if desired. Depending vfrom
6I. Mirror 5I is a built-up assembly of shatter
the cover 33 and spaced therefrom is a baille
proof glass, the mirrored surface being located
plate~ 36 (Fig. 2) of substantially the »same area
between the two layers of glass. The metal back
as the opening 34'.- To protect the >condensing
ing plate 64 may be further reinforced by rein
lenses I‘B from the heat of lamp 31, the bottom of
forcing strips 68.
'
y
the housing I1 maybe cut away as at `38; Lamp 70 The' projection screen I3 is composed of trans
31 is adjustably ‘clamped to a bracket 39,«'which
lucent material so as to permit an image to be
in turn is'adjustably supported by the 'floor of
Aprojected on to it from the rear and be visible
the housing I1. A reflector 4I is spring clamped
from the front of the screen. In the present form
by a carrier 42 which is adjustably supported,
of the invention the screen I3 is provided with a
through the 'instrumentality of a rodl 43 and the
2,465,173"
6,
stout binding 69 having eyelets 'H therein. The
selected to raise the free end of push bar | |16 up-'
cabinet I I is provided with a series of studs or
wardly into the path of the function bail blade
buttons 12 properly spaced around the edge of
|08. Then, when the push rod |96 is actuated
the'opening to be covered by screen I3. The
leftwardly by the function bail |08, clockwise ro
screen I3 is then fastened to the cabinet II by
means of a lacing 13 which passes alternately 5 tation is imparted to bell crank lever |03 to im
part in turn, downward movement to pawl |02.
through eyelets 1| and studs 12, and in this man
In this manner, the ratchet wheel 92 is rotated
ner the screen is drawn tightly and evenly across
clockwise Vone step, which, through the co-operaa
the opening provided therefor. A corner strip 15
tion of pressure rollers 9| and 94, acts in co-op
is provided around the edge of the screen |3 to
eration with a web pulling device to deliver a pre
protect the lacing connection between the screen
and the cabinet.
determined amount of record material 49 from
the supply roll 83 to the printing zone and the
A blower or exhaust fan 14 (Fig l) is located
projection area.
at the upper part of the cabinet || and is posi
The record material 49 is brought to the print
tioned behind the mirror 5|. Blower 14 is so
mounted that its exhaust port projects through 15 ing position by means of a pulling or drawing
mechanism now to be described. The record
an aperture 16 in cabinet II, and is suitably sup
ported in said cabinet.
Having reference to Fig. 2, a page printer of
material 49 as it leaves roller 9| is directed around
guide rods |89, III and ||2. These guide rods
may take the form of fixed rods, carrying guide
the type shown in U. S. Patent 1,904,164 is mount
ed in the frame I5. The printer, indicated gen-> 20 rollers thereon to eliminate friction. From the
guide rod ||2> the record material 49 is directed
erally as I 6, has been modiñed in certain respects
vertically through the printing zone and projec
to adapt it for use with the projector of the pres
tion field to a guiderod I I3 carried by a U-shaped
ent invention` The page printer comprises the
shifting frame member |14 (Figs. 2, 6, 8 and 13)
side frames 18 and 19 (Fig. 6) to which is pivoted
pivotally carried on pivots |I5 and IIB (Fig. 8)
at 8| a platen frame, indicated generally as 82.
suitably journaled in the frame I5. The page
The usual cylindrical form of platen has been dis
material 49 is then directed around a guide rod
pensed with in the present embodiment of the
||1 carried in supports || 8 (Fig. 6)’ depending
invention and has been substituted by the disc
from bars ||9 secured to angle iron crossbars I2|
form of platen |13 shown in Figs. l0, 11 and 12,
and |22 of frame I5. From thence, the page»
and which will be hereinafter described.
material 49 is directed around a spindle |23 ñxed
To provide a running account of the message
to a shaft |24 journaled in standards |26 supé
printed on the page material, a delivery mech
ported on said bars ||9.
anism is provided which comprises a means for
permitting the record material to escape from the
Shaft |24 is interconnected through a friction
clutch |21 (Fig. 8) to a pulley |28. Continuous
counterclockwise rotation (as viewed in Fig. 6) is
imparted to pulley |28 through the instrumen
tality of a belt |29 connected to a pulley I3| fixed
to the main operating shaft Í 32 of the page print-.
supply roll, suitable guides, and a web pulling
means whereby the page material is advanced
through the printing zone. T_he page material
49 in being delivered from the roll 83 is directed
over a slack bar 84 which is pivoted at 85 and is
normally biased clockwise by a spring 86 to main
ing apparatus shown in Patent 1,904,164. Shaft '
|32 carries a gear |33 which meshes with a pin-Y
ion gear |34 fixed to shaft|35 of a motor |36
tain the page material or Cellophane web taut
between the roll 83 and a flanged cylindrical guide
81 carried on a shaft 88 journaled in plates 89
(Fig. 2). Motor |36, therefore, through »gears |34
and |33, shaft |32, pulley |3|, and belt |29 im
parts continuous rotation to pulley |28 which
through the friction clutch |21`i'mparts a con*
fixed a ratchet wheel 92, the ratchet wheel and
stant torque through shaft |24 to the spindle |23.
roller being carried on a shaft 93 journaled in the
plates 89 secured to side frames 18 and 19. Co
With this arrangement the page material 49 is
operating with the roller 9| is a pressure roller
maintained in a taut condition between the spin
94 which is carried on a standard 96 secured to 50 dle I 23 and the roller 9|. Thus, when the ratchet
depending from side frames 18 and 19. The web
49 is then directed over a roller 9| to which is 4."
92 is rotated one step a predetermined amount of
the page material 49 is delivered from the supply
a rock shaft 91. Pressure roller 94 is drawn into
pressing relation with roller 9| Iby means of a
spring 98. Secured to rock shaft 91 and located
in- juxtaposition to plate 89 is a pressure roller '
roller 83, which material is immediately taken
up by the spindle |23 to preserve the taut condi'
release lever 99. Co-operating with lever 99 is 55 tion of the page material.
a shoulder |0| on plate 89 arranged so that when
As disclosed in the aforementioned
Patent
1,904,164, the page printer I6 is controlled tele
graphically by a selector magnet |31. 'I‘his is
lever 99 is actuated counterclockwise (as viewed
in Fig, 6) against the action of spring 98 it will
latch-up behind or on the left-hand side of the
shoulder IGI, thereby releasing the pressure roller
94 from engagement with pressure roller 9| and
connected in a signal line (not shown) on which
60
are impressed code combinations of signaling iin
pulses. The code signals control, through the
maintaining this condition until lever 99 is again
selector magnet I 31 of a sword and T=type se
released from the shoulder IUI to permit spring
lector (not here shown, but illustrated and de~
98 to bring roller 94 again into pressing relation
scribed in said patent) a series of selector vanes
with roller 9 I. Associated with the ratchet wheel 65 |38, which in turn controls through bell cranks
92 is a pawl member |92 (Fig. 2) which is loi-voted
|39 (Fig. 9) a set of curved code bars | 4| (Figs.
to a bell crank lever |03 carried on a pivot shaft
|04. The depending arm of bell crank |03 is piv
6 and 9). Code bars |4| and bell cranks |39
are supported on a movable type carriage, indie
cated generally by the numeral I 42, which is prok
oted to one end of a push rod |06, the other end
of which is shouldered to co-operate with a func 70 vided with rollers |43 and |44 whereby it is adapt
ed to travel on tracks |45 and |46, respectively,
tion bail |08 in the manner shown in the afore
mentioned Patent 1,904,164. Thus, in response
to a' predetermined selection a function lever,
4similar to function lever |01 shown in Fig. 6, is
positioned between side frames 18 and 19. Co
operating with code bars I 4| are a plurality
of pull bars |41 having individual springs |48.
75 Pull ‘bars |41 are operatively connected by rack
2,405,173
7
and pinion connections to a corresponding plu
8
crank lever |83 pivotally mounted at |84. To the
lower end of the depending arm of bell crank |83
is pivoted push bar |85, the free end of which
cverlies a leftwardly directed arm of the func
ing rack |52 which co-operates with a spacingr
tion lever |01. Push bar |85 is also provided
mechanism .(not shown) similar to that illus
with a shoulder |86 which co-operates with the
trated in Patent 1,904,164, to control the move
function -bail blade |08. The platen frame 82
ment of type carriage - |42 to form character
and platen |13 are shown in Figs. 6 and 10 in the
spaces, tending in this movement to wind up a
“letters” or unshift position, with the stop lug |11
carriage return spring mechanism, indicated gen
against the upper stop screw |18. Thiscondition
10
erally in Fig.,8 as |50, the strap |60 of which is
is achieved when the function bail blade |08
secured tov studV |10 Yfastened to type carriage |42.
has operated upon the shoulder |86 to move the
Upon receipt of the carriage return signal, a
push bar |85 leftwardly to rotate the bell crank
function lever (similar to lever |01) is selected
|83 clockwise, thus raising the link |82 to cause
and the carriage >return _mechanism actuated in
the platen frame 82 to rock clockwise.
themanner described in the aforementioned Pat
A correspondingly similar construction is pro
ent 1,904,164. Carriage return mechanism |50 is
vided for the ñgures or shift mechanism. That
thereupon permitted, due to the energy stored
is, a shift function lever similar to lever |01 is
therein, to return the type carriage |42 to its
provided which when selected is caused to rotate
normal or beginning-of-line position.
clockwise to bring its’ rearwardly extending arm
.A pull bar bail |53 is mounted in the type car
into operation to raise al push bar, similar to bar
riage |42 and is provided with a roller |54 carried
|85, into the path of the function bail blade |88
on the bottom side thereof on a stud |55. Roller
which, when it is permitted to operate leftwardly
|54 operates between a pair of blades |56 and
(as viewed in Fig. 6) will cause a bell crank, sim.
|-51 of a main printing bail |58 so that bail |53
ilar to bell crank |88, to pull down a link similar
can be reciprocated by bail |58 in any character 25 to |82 to rock the platen frame 82 counterclock
spacing position of the type carriage |42. Fas
wise to bring its stop |11 against the lower stop
tened to the printing bail |58 is one end of a
screw |19. The platen frame 82 is maintained
printing spring |59, the other end of which is
in its shift or unshift position by a spring actu-A
connected to a printing blow adjustment means
ated detent member |81 acting on a detent roller
30
as shown in Patent 1,904,164. Bail |58 is mount
|88.
ed on a shaft [6| on which is also carried a print
An arrangement is provided, according to the
ing bail actuator |62` which co-operates with a
present invention, for accurately controlling and
printing cam |63. Actuator |62 carries at the
accelerating the shifting movement of the por
-end of its upper arm a stud |64 which has abut 35 tion of the record material which is in the field of
ting relation only with printing bail |58 and is
projection, in response to corresponding move
not permanently connected thereto, which is to
ment of the platen between the upper and lower
permit spring printing. Printing ~bail |58 is also
case shift positions. Accelerating the web shift
provided with a pair of arms |66 which carry a
minimizes the optical effect upon the image. As
function lever bail |69. Also carried on shaft
previously alluded to, the U-shaped shifting
‘ |6| is a function bail comprising arms |65 and 40 frame member H4, which is pivotally supported
|61. Arm |65 is provided with a follower roller
at ||5 and ||6 in the frame l5, carries a guide
which co-operates with a function bail cam |68,
rod | |3V for the record strip 49 which co-operates
and armV |61 supports on its end the function
with guide rod ||2 to guide the record material
bail blade |08.
’
through the field of projection. Frame member
Associated with the selector varies |38 are a 45 H4 is operable- between adjustable stops 244 and
plurality of function levers |01 mounted on pivot y 245 mounted on arms `246 and 241, respectively,
rality of type bars |49 pivoted on a shaft |5|.
'Type carriage |42 is also provided with a spac
rod |1| Yand provided with indi -dual springs |12
ywhich-tend to rotatek the function levers clock
wise into registry with the selector vanes |38.
The function levers |81 are normally held out
of engagement with the selector vanes |38 by
means of the rod _|69 of the function lever bail.
'A_s previously mentioned, the platen frame 82
.is pivotally supported on pivots 8| in side frames
18 and 19. The platen comprises a circular disc
|13 (Figs. 6, 9, 10, 11 and 12) rotatably mounted
on a carriage |14 which is slidable on rods |15
and |16 carried by platen frame 82. Platen car
riage |14 is connected to the type carriage, as
will be presently described, so as to be movable
therewith, the effective printing edge of the platen
|13 being located coincident with the printing
point or Zone determined by the path of opera
tion of the type .bar |49.
Y
The platen frame 82 is adapted to be rocked
from ,the “letters” or unshift `position to the “fig
ures” or shift position vin the manner fully set
of bracket 248 fixed to the cross bar |2| (Figs. 6
and 13).
Mounted on bracket 248 are elements compris
ing an overcentering device which co-operate
with the shift frame 82 to effectuate the control
of the record strip in the projection field. The
overcentering device comprises a lever arm 249
~ pivoted at 25| to bracket 248, and is articulated
to the member |||4 at 252. Lever 249 terminates
in a forked end 253 in which a stud 254 is slidably
operable. Stud 254 is mounted on the end of a.
lever arm 255 pivoted at 256 to bracket 248. A
spring 251 is extended between stud 1254 and a
springpost 258 carried on bracket 248. Spring
post 258 and pivots 25| and 256 are arranged on
a common center line substantially intermediate
the stops 244 and 245 sok that bar I I4, after pass
ing over center above or below said line, will be
urged` by spring 251 against stops 244 or 245,
respectively,
Member `| I4 is connected to the platen frame 82
by means of a pair of lever members 259 and
Briefly, the side frame of the platen frame 82
26| which are pivoted to frame 82 at 262and 263,
(as shown in Fig. 6) is provided with a lug |11 70 respectively (Figs. 6 and 13). Members 259 and
' which operates between two adjustable stops |18
26| are each provided at the upper end thereof
and |19. -Adjacent to lug |11 there is pivoted
with an open-ended slot 260 which fits over the
frame
82
on
pivot
to the side frame ofthe platen
shank of a headed ,stud 281 and 266, respectively.
|8|, the upper end of a link |82, the lower end
With this arrangement, the members 259 and 26|,
of which is pivoted to the horizontal arm of a bell A*
forth in the aforementioned Patent 1,904,164.
' 2,405,173
may be easily disconnected from studs 265` and
266 so as to render the printer readily detachable
from the frame l5. Supported by the depending
la shield |95 (Fig. 10) serves (as will presently
appear) to prevent smudging during the printing
operation. As is well known, the type bar |49
arms of the levers 259 and 216| is the previously
is provided with an upper case type face |96 and
mentioned guide rod ||2. Levers 259 and 26|
a lower case type face |91 (Fig. 17). However,
are normally urged in a counterclockwise direc
according to the present invention the lower case
tion (as viewed in Fig. 13) about their respective'
ytype face |91 is provided with a slope correspond
pivots 262 and 263 by individual springs 264 an
ing tothe slope of the periphery of the platen |13
chored to spring posts 205 ñxed to rail ‘.206 of the
when in the lower case position. The dimension
platen frame `82 (Fig. 14).
10
201 of the upper case type |96 is arranged to be
Having reference to Figs. 6 and 13, the frame
slightly less than the minimum height 2|0 of the
||4 is illustrated as movable with platen frame
lower- case type | 91. When printing is eiîected
82. - To assure a definite extent of movement of
in the lower ease position, the type face |96,
frame H4, the stops 244 and 245 are provided.
The platen frame 82 is shiftab-le between stops 15 being lower than the type face | 91, will not touch
the record material and hence no smudging of
|18 and |19 by the spring action of detent |81
the printed record will occur`
which is in the nature of an overcentering means
When printing is eiîected in the upper case
because, as link |82 acts to rock the platen frame
position, means is- provided for preventing the
82 between the two shift positions, the camming
action of detent |81 operates to assist and hasten 20 lower case type face |91 from coming into direct
contact with the surface of the record material.
the shifting movement. The action of the over
To achieve this result a shield |95 is provided
centering device mounted on bracket 248 is com
which is adapted to be interposed vbetween the
parable, and to permit this assisting action, the
type face |91 and the platen |13 when printing
hole 266 (Fig. 14) in each of the levers 259 and
26| is elongated so that the overcentering action 25 is being effected» in the upper case position.
Shield |95 is secured to the ribbon oscillating
takes eiîect immediately upon passing over cen
member |99, which, as described in the afore
ter independently of the entire movement of
mentioned Patent 1,904,164, oscillates the inking
platen frame 82, and urges frame | I4 into proper
ribbon into and out of the path of the type faces
position against one or the other of the adjust
able stops 244 or 245. In other words, the platen 30 during the printing operation. The ribbon oscil
lator |99 is pivotally articulated toarm 20| of a
fra-me 82 begins the movement of the frame | I4,
lever 202 which in turn is pivoted at 203 to a lever
and the overcentering device completes this
204 pivoted at 220 to the type carriage | 42. Lever
movement suddenly upon passing over center, the
204 is arranged to carry a roller 205 which rides
elongated holes 266 permitting the overcentering
device to take the control of the frame ||4 from 35 on the bottomI side of a rail 206 mounted on the
the platen frame 82.
platen frame 82, as disclosed inthe aforemen
tioned Patent 1,904,164. Roller 205 is pressed
In Figs. 10, 11 and 12 is illustrated the Inan
against the rail 206 by a spring (not shown), so
ner in which the platen carriage | 14 is connected
that when the platen frame 82 is rocked between
to the type carriage |42 so as to be movable there
with. As previously mentioned, the platen car 40 the shift and unshift positions, roller 205 will
constantly contact with said rail 205, and lever
riage |14 is slidably supported on rods |15 and
202 will be reciprocated therewith.
»
The depending arm 208 of the lever 202 is op
erably associated with the pull bar bail |53 (Fig.
to a member |9| which is secured by screws> |92
6) so that the reciprocative motion of bail |53
will cause the oscillation of the lever 202 about
pivot 203, whether the platen frame 82 is in the
shift or the unshift position. Thus, when the
bail |53 is in its normal position (the leftward
position as shown in Fig. 6), the lever 202 will
.to the type carriage |42. As viewed in Fig. 12,
the circular platen |13 is rotatably mounted on
the platen carriage |14 by means of an eccentric
screw means |93. By means of the adjustment
|93 the platen |13 is adjustable toward and away 60
hold the inking ribbon, through the instrumen
material to vary the clearance
tality of the ribbon guide (not shown) located at
the upper extremity of member |99 (Fig. 10) , in
in Figs. l1 and 12, is also pro
its downward position to effect visibility of the
vided for the platen |13, through the instrumen
printed
character. When the bail |53 moves
tality of the eccentric adjusting means-|90.
rightwardly for a printing operation, the ribbon
An important feature of the present invention
vwill be raised to printing position due to the
is the provision of' a, platen so positioned as to
counterclockwise movement imparted to the lever
reduce to a minimum the obstruction of the pro
202 by the bail |53. When the platen frame 82
jected image by the platen. To achieve this
result the platen | 13 is tilted, with respect to the Voo is in the position shown in Fig. 10, which is the
lower case printing position, the shield |95, upon
record material printed upon, suiiiciently to clear
oscillation of lever .202, will not be raised sufii
>the light cone. The peripheral surface of the
ciently to b_e interposed between the type face | 91
platen |13, upon
which
printing
is
eil'ected,
is
and the platen |13. ’Howeven when the platen
slightly beveled so that in one of the shift posi
frame 82 is in the upper case printing position
ltions of the platen the peripheral surface of the
with the platen |13 in printing relation with the
platen will be parallel to the record material. In
upper case type face |96, the shield |95 will, upon
the present embodiment the peripheral surface
reciprocation, be raised so as to become inter
of the platen |13 is parallel to the record strip
posed
between the lower case type face |91 and
when the platen frame 82 has been shifted to the
upper case position as indicated in Fig. 10 by the 70 the record material, thus preventing any ink
which has accumulated on the type face |91 from
dotted line |94 of the platen |13.
smudging
the record material.
To compensate for this arrangement of the
As
illustrated
in Figs. 10, 11 and 12, there is
platen |13', the type faces on the type bar |49 are
provided a platen rotator for automatically chang
arranged as shown in Fig. 17. Moreover, this
'arrangement of type faces in co-operation with 3.75 ing the printing point of the platen |13 in re
sponse to each carriage return operation. As
12
l1
therein, so that when the carriage return signal
is received by the printer the carriage is freed
in the manner described in the aforementioned
Patent 1,904,164, and the carriage return opera
tion is eiîected through the release of the energy
previously described, the platen |13 spaces with
the type carriage |42, and accordingly is spaced
step by step for character spacing and, upon
reaching the end of'the line, the platen |13 is
returned rapidly with the carriage |42 to the be
ginning-of-line position.V In contact with the
platen |13 at a point opposite to the printing
point is a closely wound coiled spring 200 which
isconnected at its ends to the side frame mem
bers of the platen supporting frame 82, in such
a manner that the platen |13 is caused to rotate
as it advances duringcharacter spacing. More
over, upon the rapid return movement of the
platen |13 (under the influence of the carriage
return spring |50) during the performance of
the carriage return function, _the platen |13 will,
owing to the combined `sliding and rolling rela
tion with the yieldable spring member 200, ro
tate incommensurately, thus causing the same
printing point of the platen to be presented to
the type bars a minimum number of times. In
stored up in the return mechanisms |50 and 233.
In the embodiment shown in Figs. 8 and 9, the
return of the carriage |42 and the counterweight
2 I1 is illustrated as effected by two return mech
anisms, the return mechanism |50 acting directly
upon the type carriage |42 and the return mech
anism 233 acting >directly upon the counterweight
2I1. The two return mechanisms co-operat'e to
facilitate the return of both devices. 1f desired,
15 a single return mechanism may be employed by
providing a return spring mechanism of suñicient
strength to return both devices. In this event,
the spring return Vmechanism may be located
either at the position shown by the return mech
20 anism |50 or by the return mechanism 233. The
carriage return mechanism |50 is provided with
a dashpot buffer mechanism as is shown and de
other Words, through the instrumentality of the
platen rotator 200, the platenY |13 is controlled
scribed in the aforementioned Patent 1,904,164.
The counterweight return mechanism is simi
in such manner as to reduce to a minimum .the
larly provided with a buffer mechanism. This
25
number of times anyparticular printing point
buiîer mechanism comprises a dashpot 235 suit
on the platen is impinged upon, thereby reducing
ably mounted in the plate 236 secured to frame
to ~a minimum the wear at any given point and
I5. Pivotally supported at 231 on bracket 240
hence prolonging the life of the platen. In lieu
and properly positioned with respect to buffer 235
of the coiled spring 200, a taut wire or cord can,
of course, be used. .
30 is a buffer lever 236. The rounded end of lever
In accordance with the present invention, the
printing apparatus used in combination with the
projection system is of such structure and ar
rangement that it is not affected by change in
physical position of the assembly as a whole with
respect to gravity. Specifically, a counterweight
is provided which is associated with the movable
238 nts into a notched portion of the plunger
239 of the buffer 235 (Fig. 18). End 24| of the
plunger 239 is adapted to receive the blow from
the counterweight 2|1, said end 24| being receiv
able in the'counterbore 242 in the counterweight
231. The counterbore 242 is indicated in the
present embodiment for structural purposes only
and is not an essential element of the structure.
type carriage |42 so 4as to render the movement
of the type carriage |42 independent of the force
of gravity, and to assist the carriage return spring
in uniformly moving the type carriage in any
The resistance of pneumatic buffer 235 is varied
by means of adjustable ports, inV a well-known
manner. A spring 243 tends to rotate lever 238
physical position of the printer.
As previously described, the type carriage |42
about pivot 231 to restore the buiîer mechanism
to its operative position.`
The present invention also contemplates the
is movably supported on tracks |45 and |46, and
after being operated upon by the spacing mech
anism, the carriage |42 is returnable to the be
ginning-of-line position by the carriage return
spring mechanism |50. Having reference to Fig.
8, the type carriage |42 has secured thereto a
bar 209 to the center of which is secured a stud
2|| on which is pivoted a har 2|2. A strap 2|3
is secured to end 2|4 of bar 2|2, and extends
around an idler roller 2|5 and is secured at 2|6
to a counterweight 2|1. Roller 2151s rotatably
in a counterclockwise direction (Figs. 8 and 9)
projection of predetermined message matter or
other information of a iixed nature by providing a
stereopticon slide, as illustrated in Figs. 15 and
16, which is readily insertable into the ñeld of
projection. The stereopticon frame 21| com
prises a plate having integral flanges 212 and 213,
which are conformed at their upper ends with
hook portions 214 and 215, respectively, which
embrace guide rodk |I3. Flange 213 is provided
at its lower end with an extension 216 which bears
supported on a bar 2|8 suitably positioned in the 55 against guide rod I I2 (Fig. 16) , thereby serving to
frame I5. Secured to end 2I9 of bar 2I2 is a
steady the frame 21| against oscillation and si
strap 22| which extends around an idler roller
multaneously to hold the frame 21| in the proper
222 _and is fastened at 223 to the counterweight
vertical plane coincident with the ñeld of pro
2|1. Idler roller 222 is rotatably mounted on thejection. Frame 21| is readily insertable in the
bar 2 | 8. Counterweight 2 | 1 is provided with roll
projector by means of the handle portion 211 (as
ers 224 and 225 (Fig. 9) which roll on upper
shown in Figs, 15 and 16, for example). Frame
rail 226, and rollers 221 and 228 which roll on
21| is also provided with an aperture 210 of a
lower rail 229. Rails 226 and 229 are appropri
size determined by the area of the projection
ately supported in theframe. I5. Secured at 23| 65 field, so that a stereopticon slide of. suitable di
to the counterweight 2 I 1 is astrap 232 of a spring
mensions may be placed thereover. The means
return mechanism 233 comparable to the carriage
return spring mechanism |50. The spring re
for supporting and holding the stereopticon slide
comprises a pair of flanges 218 and 219 integra-l
turn mechanism 233 is mounted on a bracket 234
with _the frame 21| at the bottom edge thereof,
secured to the frame I5.
,
and a retainer comprising aspring clip 28| pivot
As the carriage |42 advances step by step in 70 ally secured to the frame 21| and properly spaced
response to the spacing mechanism, the carriage
therefrom by a spacer 282. Thus, to insert a
return spring mechanism |50 is wound up and
stereopticon slide, the spring clip 28| is swung
energy is stored therein in readiness to return the
aroundits pivot to its horizontal position, and the
` carriage. At the same time, the carriage return
s
218 and 219; and
mechanism 233 is also wound up to store energy 15 slide is mounted on the flanges
2,405,173
14
after pressing the slide lightly against the frame
housing and condensing lens system supported on
21|, the spring clip 28| is again swung back to
the position shown in Figs. 15 and 16, thereby 4 said framework, a.telegraph receiver mounted in
said framework in co-operative relationship with
serving to retain the slide in place.
It is understood that the features of the pres C21 said lamp housing and lens system, a web direct
ing means so arranged with respect to said re
ent invention are not to be limited to the speciñc
ceiver and lens system as to provide a vertical
forms described herein, but embrace all forms
lprojection ñeld, recording means in said receiver
which come within the scope of equivalency of
the appended claims.
for producing lines of printing on said web in said
projection ñeld, means for case shifting said web
What is claimed is:
10 in said projection ñeld to facilitate recordation of
1. In combination, a printing device having a
upper and lower case characters thereon, means
carriage movable to form character spaces, means
for moving said web so as to direct said lines of
for directing record material through said device
printing upwardly across said projection field,
comprising means for guiding said material in a
vertical plane above and adjacent to said car 15 mirrors and an objective lens co-operating with
each other so as to produce upon a screen an
riage, means comprising a projection system for
projecting onto a screen images of the characters
image moving thereacross in correspondence with
the movement of the web through said projection
ñeld, and overcentering means effective inde
ing positive stop elements and overcentering 20 pendently after a predetermined initial operation
of said case shifting means to accelerate shifting
means operable therebetween to accelerate shift
produced on said record material, means for case
shifting said guiding means, and means compris
ing movement of said guiding means independ
ently of said case shifting means to minimize the
optical eiîect of said shifting movement upon the
image.
2. In combination, a printing device having a
carriage movable to form character spaces, means
for drawing record material through said device
comprising a pulling device disposed beyond the
exit end of a vertical projection ñeld located im 30
mediately above the printing point and an inter
movement of said web in said projection ñeld to
minimize the optical eiTect of said shifting move
ment upon the image.
6. In a projection system, a framework, a lamp
housing and condensing lens system supported on
said framework, a telegraph receiver mounted in
said framework in cooperative relationship with
said lamp housing and lens system, a web direct
ing means s0 arranged with respect to said re
ceiver and lens system as to provide a vertical
mittently operable delivery means positioned in
projection field, recording means responsive to
positioned between said pulling device and said
delivery means for sluiting said record material
said web so as to direct said lines of printing up
code signals including a type carriage and a
advance of said projection ñeld, means compris
platen movable therewith to produce lines of
ing a projection system for projecting onto a
screen images of the characters produced on said 35 printing on said web in said projection ñeld,
platen shift means, means having a slotted artic
record material in said projection ñeld, means
ulation with said shift means, means for moving
wardly across said projection ñeld, mirrors and
for recording upper and lower case characters
thereon, and overcentering means to accelerate 40 an objective lens mutually co-operative so as to
produce upon a screen an image moving there
shifting movement of said shifting means to min
across in correspondence with the movement of
imize the optical effect of said shifting move
the web through said projection ñeld, and over
ment upon the image.
3. In combination, a printing device having a
type carriage movable to form character spaces 45
and a platen movable with said carriage, means
for drawing a web through said device comprising
7. In combination, a printing deviceV having a
carriage -movable to form character spaces, a
a pulling device disposed beyond the exit end of a
vertical projection ñeld located `immediately
above and including said platen and delivery
50
platen movable with said carriage, platen
means positioned in advance of said platen, means
comprising a projection system for projecting
onto a screen images of the characters produced
on said web, means for case shifting the web in
said projection ñeld, and overcentering means ef
fective to accelerate shifting movement of said
web to minimize the optical effect of said shifting
means upon the image.
4. In combination, a printing device, means for
drawing a web through said device comprising a
pulling device disposed beyond the exit end of a 60
vertical projection ñeld located immediately
above and including the printing point and deliv
8. In combination, a printing device having a
ery means positioned in advance of said projec
tion field, means comprising a projection system 65 carriage movable to form character spaces, means
for directing record material through said device
for projecting onto a screen images of the char
acters produced on said web in said projection
ñeld, means positioned between said pulling de
vice and said delivery means for shifting said web
for recording upper and lower case characters
thereon, and overcentering means to accelerate
shifting movement of said shifting means to min
imize the optical effect of said shifting move
ment upon the image.
5. In a projection system, a framework, a lamp 75
' ‘
guiding said material in a
and adjacent to said car
riage, means comprising a projection system for
projecting onto a screen images of the characters
produced on said record material, means for case
shifting said guiding means, and overcentering
means to accelerate shifting movement of said
guiding means to minimize the optical effect of
said shifting movement upon the image.
WALTER J. ZENNER.
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