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Jam» ï 394'?
' w. G. H. FINIcI-I
Jam 7, "M471
w. G. H. FHNCH
Filed Sept. 16, 1944
l Là”
Sheets-Sheet 2
mi. G. H. FäNCH
wie@ sept. 15, 1944
¿è Sheets-Sheet 3
w. G. H. FINCH
Filed Sept. 16, 1944
l Nw
4 Sheets-Sheet '4
Patented Jan. 7, 1947
William G. H. Finch; Newtown, conn.
Application September 16, 1944, Serial No. 554,427
2 claims.
(C1. 23e-70) `
My present invention relates to facsimile scan
ning systems and more particularly to scanning
means for use in connection with chemically
treated paper at a facsimile receiver.
Essentially, my invention contemplates the use
of a helical type of scanning device in place of
the stylus. That is, ythe chemically treated paper
on which a record is to be made is unwound from
a roll of material and by appropriate feeding de
Figure 6 is a `view of the knife blade taken from
line 6_6 of Figure 4 looking in the direction of
the arrows.
Figure 7 is a cross sectional view of the knife
, blade and scanning drum taken at line l-‘I of
Figure 2.
Referring now to Figure l, I have hereV shown
in highly schematic form the principles embod
ied in my invention. The chemically treated p`a~
vices moved along with respect to a drum and 10
per I0 passes over the knife blade II and beneath
blade. The paper moves over a blade which is
the scanning drum I2. Scanning drum I2 has
spring biased toward the drum. The drum has a
secured thereto in any suitable manner, as, for
one-turn helical wire secured thereto.
instance, by welding, soldering or brazing, the
The use of the single helical wire types of
wire I3 which is wound helically in one turn of
scanner in connection with a spring biased blade 15 the order of 360° around the drum I2. The paper
as contemplated by the present invention elimi
I0 and drum I2 are stationary just before the
nates excessive wear and trouble in prior stylus
of any scanning operation. Also, at the
type facsimile receivers. The single wire has no
start, or just `before the start of any scanning
single point of excess wear and is completely sup
operation, portion I3’ of the wire I3 is in posi
ported by the drum on which it is wound. The 20 tion where it is about to press the paper IIJ against
wire thus need not necessarily be limited to a
the knife blade II.
diameter as small as 1/100 of an inch, since its
When the scanning operation begins, the drum
contact'with the paper and pressure on the paper
rotates in the direction indicated by arrow
against the knife blade is only tangential. Con
I4, and the paper is moved 1/100 of an inch in
sequently, the wire may be even larger in diam
the direction indicated by the arrow I5-that is,
eter. The edge of the knife blade, however, 2.5 the full movement of the paper l0 during a com
against which the paper is pressed should be of
plete revolution of the drum l2 is 1/um of an inch.
the order of l/mo of an inch or less in width. This
During this'revolution of the drum I2 and the
blade, however, is a stationary member spring
movement of the paper I0, continuously succes-v
biased into contact with the helical wire and not C13 sive portions of the wire I3 are brought into con
subject to excessive wear.
tact with the paper I0 and press the same against
Accordingly, another object of my invention
the blade II. The point of contact passes along
is the provision of a facsimile scanning device
the wire I3 from portion I3’ to portion I 3"..
for a facsimile receiver intended to act on chemi
Consequently, the point of contact I3a, during a
cally treated paper wherein the scanning device 35 single revolution of the drum I2, moves entirely
and elements in contact with the paper will not
across the paper I0 in the direction indicated by
be subject to excessive wear.
the arrow 20.
Still another object of my invention is the
The drum I2 and the feed mechanism herein
provision of the helical wire type scanning device
described for the chemically treated paper
for facsimile scanning systems especially adapted 40 after
interrelated so that each revolution of the
for facsimile receivers.
These and many other objects of my invention
will become apparent in the following figures and
drawings in which:
Figure 1 is a schematic view illustrating the
principle of operation of my invention.
Figure 2 is a top plan view of a device em
bodying my invention.
Figure 3 is a view in elevation of one side of
the device of Figure 2.
Figure 4 is a view in elevation of the other side
of the device of Figure 2.
Figure 5 is a View of the knife rblade taken
from line 5-5 of Figure 4 lookingin the direction
of the arrows.
drum I2 produces a movement of the paper I 0,
in the direction indicated by the arrow I5 for a
distance of the order of 1/100 of an inch. That
is, where the scanning lines are 100 lines per inch,
then the paper will be moved 1/100 of an inch
during the scanning operation. Where the scan
-ning operation is at 60 lines per inch, then the
paper will be moved forward 1/su of an inch dur
ing the scanning operation. The drum I2 will
50 make a complete revolution during each scanning
operation to produce a single line. At the end
of each scanning operation, the drum I2 will be
brought to a stop and on receipt of a synchro
nizing impulse will start once more. Immedi
55 ately after the portion I3" of the wire I3 has left
quently, no return movementl or lost motion of
any kind is required for scanning. Nor are a
over roller âI and then to the paper draw rolls
multiplicity of scanning styli required for this
35’. When the swinging brackets 35 and 35’ are
lifted up together with the scanning drum I2 and
the guide rollers 69 and Si, then, as shown in
Figures 3 and 4, the paper i8 may be threaded
over roller @il under the scanning drum l2 and
the paper at the completion of the scanning op
eration, the portion I3’ of the wire I3 is in po
sition to begin the scanning operation. Conse
7B and 'H which are operated in a manner here
inafter described.
It will be obvious, therefore, thatran extremely
The ends 55 and 55’ of the swinging brackets
highy speed of scanning may be maintained.
are slotted at ‘l2 and l2" respectively in order
Where synchronism is not an important factor, 10 to
receive the locking device '15. The locking
the scanning operation may be absolutely con
device on each side comprises a standard l5
tinuous-that is, the drum I2 may rotate con.
on which the end 55 or 55’ rests. The standard
tinuously and, by reason of the integrated drive
'Itis provided with a vertical slot ‘Vs’ within which
between the drum I2 and the feed for the paper
is pivotally mounted at i8 the locking bar le.
Hl, the scanning lines on the paper I0 will fol
The locking bar i9 is threaded at its vupper end
low each other at appropriately spaced intervals
and a nut Bill is mounted thereon. When the end
of thev swinging bracket 35 is placed on top
of 1/ioo of an inch or 1/60 of an inch depending
on the degree of intelligibility required.
Where the driving motors for the transmitter
and receiver are highly accurate so that a varia
of the standard 16, the locking Ybar ‘i9 is swung
20 upwardly so that it enters the slot ‘l2 of the end`
55 of member 35V, and the nut 8l)V is then tight
ened downen top of the extension 55 of the
swinging bracket 35 to hold the same securely in
tion in speed of no more than 5% between the
two systems will exist, synchronization is not es»
sential. Where, however, extremely accurate re
sults are required, then the drum I2 may be syn
When it is desired to raise the scanning drum
l2 and the swinging bracket `55 in order to re
Patent No. 2,295,572. While this patent does not
thread the paper or for other purposes, then
show synchronization of a helical scanner device,
theA nut Ell-need only be loosened and the locking
the synchronizing system described therein is ap
bar 'I9 be swung aside so that these members
plied to control of the movement of the drum
carrying the paper and may as readily and with 30 may be raised.
The paper draw rolls vl!!Y and 'II are driven from
out any variation at all be applied to the scan
the shaft 59‘ of the scanningv drum I2. The worm
ning drum l2 of the. present invention. Accord
gear 85 (Figures 2` and 3) mounted on- theexten
ingly, such synchronizing systems require no spe
chronized in a manner shown in connection with 25
cific description here, and the specific synchroniz
ing system constitutes no specific part of the pres
ent invention, except, of course, that synchroniz
ingzsystems may be'useol.
sion 8E of `shaftwäílV through bracket 35' drives
35 the spiral gear 87- moun-ted on shaft 8E'. ShaftV 88
is journalled in appropriate bearings in the» stand*
ards 90 and 9|v mounted on the base 25. A‘Worm
` ‘
gear 93 on shaft 38 drives the spiral gear Sá
on ther upper draw roll i0. >Appropriate ten~
sioning means maybe provided with respect to
In Figures 2, 3 and 4, I have shown a specific
embodiment of the invention of Figure l wherein
al1 of the elements are rnountedonthe> base 25. 40
Shaft 21 of lmotor 26 is by means of the coupling
the drawl rolls 15J and ‘H- to drive lt'hern together
so that the drive of the draw roll ’iii will cause
rotation ofthe draw roll 'Hz Draw rolls iii and
bearingßû. Shaft 2B drives gear 32 which.' in
it haver an- appropriate friction surface in order
turn, drivesv the larger gear 33. Gear 33 is mount
readily draw the paper lo between them.
ed on shaft 34, which is rotatably mounted on the
The paper if)> is provided in the form of the,
swinging bracket arm 35 hereinafter described.
supply roll Iûû mounted on an appropriate shaft
GearV 3S also mounted on shaft 34 drives the
larger gear 3l mounted on shaft 38, which in ' IGI and is drawn therefrom> under the guide roll'
H92, then over thev guide roll
under the scan
turn is rotatably mounted on> the swinging brack
ning drum i2, over the guide roll 6I', and then
et 35. Small gear 39' also mounted on` shaft 33
through the draw rolls 'lo and-"HA which' draw the
drives the larger gear t!) mounted on the shaft
paper out. Appropriate tensioning means may,
êI. Shaft lli is journalled’ in the bearing ‘42 of
if deSireCL'be provided on the sha-it ¿ill lof the
swinging bracket 35 and carries at its inner end
supply roll It@ to» ensure an even'feed of paper.'
one disc All of the clutch d5. `The other disc ¿iS
Thel blade Il is mounted on the" transverse
of clutch 45 is driven by disc ¿i4 by meansof the
standard HIJ supported on the base 25' of the
friction plate lli; the said disc ¿i6 of clutch ¿i5
apparatus. As seen in Figures 5 and?, >the trans
is connected to and drives the `soanningdrum I2.
verse standard IIS is a solid -member supported
Shaft 5i? of the scanning drum I2 is appropriately
by appropriate’ brackets HI, Iii>v on Ythe base;v
journalled at one side within the> 'clutch 45 and
at they other side in the Vswinging bracket 35’. 60 ‘ Member it@ has a groove i201 in the upper surfaceY
thereof, the said groove communicating' with. a
Swinging bracket' 35’ Yis pivotally _mounted
number of vertical holes H25'. The blade i! is
about the stud 5| on the bearingßii’;v The swing.
28 connected to _the shaft V29' which rotatesin
ing bracket 35. is pivotally mounted about the
shaft 2S. The brackets 35 and 35’ have eXten
sions l55 and 5E’ respectively by which they may
be'manually grasped and.’ lifted up. When the
ends 55 and 55’ are lifted, the brackets rotate
Y an inverted “T” shaped-member having the blade
. portion II as above described anda flange base
§22 which rests in- the groovev I2@ on thev base
thereof. Compression springs i25- in each> of'the
vertical holes I2 IV bear upwardly against Athe-iiange ’
|22 of the blade I I tending to drive the blade up.
about their respectiveV pivots 29 and 5l to lift up
The blade il is prevented from accidental re»
the scanning drum I2 and the'associated gear
train therefor. This permits simplified thread 70 ` moval by the top plate |30 having the slot> i3!
(Figures 5 and 7) through which. theï plate I/l
ing of the paper through the mechanism in a
manner hereinafter described;
' Guide rollers {il} and 6 i' for the paper are mount
ed respectively on shafts. £2 and S3,Y which areä
projects, slot ISI being sufñciently. narrowso
that the fia-nge. I22A cannot be» pushedV tç ere-l
through. When the swinging bracketsfäâfand»
journalled in opposite swinging brackets 35 and 75 35’ `are raised, the compression springs I25 can
drive the blade II up so that the nange |22 bears
against the underside of the top blade iâll. When,
however, the swinging brackets 35 and 35’ are
lowered, the wire I3 on the scanning drum I 2
presses the plate II down against the action oi
compression springs i25 as shown in Figure 7.
When the chemically treated paper lil has been
threaded through in the manner previously de
scribed and the swinging bracket arms 35 and
35’ have been lowered, the scanning wire I3 on
scanning drum I2 presses the paper against the
blade II.
Now as previously described in connection with
Figure l, for each revolution of the scanning drum
l2, the portion of the Wire I3 in contact with the
paper lil and blade II traverses the scanning
drum longitudinally and thus traverses the paper.
The plurality of springs §25 ensure that there
will always be appropriate pressure between the
Wire I3 and the blade II at the point of contact
so that this moving point on Wire I3 acts as a
fulcrum on which the rigid blade II pivots.
synchronizing system exactly like that disclosed
in the specification oi United States Letters Pat
ent No. 2,295,572, may be applied to the scanning
drum I2 and may act on the plate ¿le of clutch
45. Where such a start-stop synchronizing sys
tem is used, eXtreme accuracy in the facsimile
reproduction will be obtained.
The amount of the wire in contact with the
paper and the blade is determined by the softness
of the paper itself; that is, the extent to which
the paper will be compressed by the wire press
ing against the blade. For this purpose, there
fore, the springs |25 pressing the blade upwardly
should exert just sufficient pressure to obtain
particles is obviated. Also, by my invention, a
Wire of a diameter greater than .01 inch may be
used to make a line .01 inch wide or even less.
In the foregoing, I have described my inven
tion only in connection with a specific preferred
embodiment thereof. Many variations and modi
iìcations of my invention should now be obvious
to those skilled in the art. Accordingly, I prefer
to be bound not by the speciñc disclosures herein
but only by the appended claims.
I claim:
l. In a facsimile receiver of the type having a
rotatable drum and a helical member projecting
from the surface thereof; a blade mounted ad
jacent said drum, the edge of said blade ex
tending along a line parallel to the axis of said
drum, spring members engaging the rear edge
of said blade and causing its front edge to bear
against said drum, said blade having a depth
such that it forms a non-iiexible rigid constrw
tion in its longitudinal direction, said spring
members causing said rigid blade to bear tan
against rotation
and pivot
of on
saida drum
point on
the pivot point on said helical wire to move along
said blade, said blade supporting means compi
ing a longitudinal support for said
a gro
in the surface of said support for receiving and
guiding the base of said blade, recesses in said
support communicating with said groove, said
spring members being positioned in said recesses
and bearing against the rear edge o'r‘ said blade.
and means :for limiting the movement oi said
blade out of said groove under the influence ol
said spring members.
2. In a facsimile receiver oi the type having a
rotatable drum and a helical member projecting
from the surface thereof; a blade mounted ad
the paper. However, since such chemically
jacent said drum, the edge oi said blade extend
treated papers may be very thin and the coat
ings thereon very fine, the paper has substan 40 ing along a line parallel to the axis of said drum,
spring members engaging the rear edge of said
tially no compressibility and the marking there
blade and causing its front edge to bear against
on will be exceedingly sharp, determined, since
said drum, said blade having a depth such that
the blade is a non-iiexible rigid member as shown
it forms a non-flexible rigid construction in its
in Figure "I, only by the tangential portion of the
45 longitudinal direction, said spring members cauz
- wire in contact with the paper and the area of
ing said rigid blade to bear tangentially against
the paper in contact with the blade.
and pivot on a point on said helical retainer,
The wear on the recording element is not con
rotation of said drum causing the pivot point
fined to a, single small area of 1/ißo of a square
inch, but to longitudinal elements of relatively 50 on said helical wire to move along said blade,
said blade supporting means comprising a lon
tremendous area which are successively brought
gitudinal support for said blade, a groove in the
into contact with the paper.
surface of said support for receiving and guiding
Thus a further difficulty which frequently
the base of said blade, recesses in said support
occurred in connection with stylus recording is
communicating with said groove, said spring
obviated. Previously, the sharp point of the
members being positioned in said recesses and
stylus tended sometimes to scratch the record
bearing against the rear edge of said blade, means
ing paper and often collected dust and particles
for limiting the movement of said blade out of
which (owing to the content of the paper itself)
said groove under the influence of said spring
often consisted of carbon particles which tended
members, said means comprising a ñange extend
to smudge the recording,
By the utilization of my present apparatus, a 60 ing from the base of the blade, and means at the
open end of said groove engaging said flange.
sharp point which would tend to collect such
good contact of the blade against the paper and
the paper against the wire Without compressing
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