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Патент USA US2138110

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Nov. 29, 1938.
F. LOEFFLER
2,138,110
RECORDING MECHANISM
Filed July 16, 1937
7
INVENTOR
Zia-Z
BY
full/(sf
ATTORNEY
2,138,110
Patented‘ Nov. 29, 1938
UNITED ‘STATES PATENT orrlcs
2,138,110
ancoanme MncnAmsM
Fritz .Loe?ler, New York, N. Y.
_
Application July 16, 1937, Serial No. 153,880 4 Claims. (Cl. 271-23)
This invention relates to new and useful im
provements in recording mechanism, and par
ticularly to recording mechanisms in which the
record is made on a web of paper continuously
5 movedby a clock mechanism.
The object of the invention is to provide a
device which may be readily and accurately ad
justed without introducing undue complications.
With this object in view I provide certain im
10 proved instrumentalities, of which the following
are noted:
'
v
The gear train through which the clock mech
anism drives the recording .web is-arranged for
ready adjustment to eliminate backlash; means
15 are provided toeliminate play in the driving roll
20
To insure accurate positioning of the bracket I
‘I and to ‘compensate for manufacturing inac
curacies, a screw-threaded stud II is driven
through the base plate I and engages the bot
tom of the foot 8 between the screws -9. By 5
means of the two screws 9 and the screw-thread
ed stud ||, accurate positioning of the bracket
and therefore the roller'3 is insured. Bracket
46, supporting one end of roller I3, is similarly
mounted. As best shown in Fig. 7, the screw 10
Ila engages the»foot of the bracket in' alignment
with the bracket proper, whereby adjustment‘ of
the bracket in all directions is made possible;
within the obvious limitations of the structure,
the bracket can be swung into any angular posi 15
of the recording web; means are provided to
tion with respect to its axis and ?rmly held inv '
compensate for manufacturing irregularities in
the construction and mounting of the supporting
brackets of the driving, guiding and take-01f
such position.
rollers.
»
- The web Ill is led from the roller 3 onto driv
ing roller l2 and thence over an aluminum table
, 20
I2a onto the take-oil roller I3.
I
These and other features of the‘invention will
more clearly appear from a preferred embodi-l
ment thereofwhich will be described with the
aid of the drawing in which—
Fig. 1 is a side elevation of as much of the
recording mechanism as is necessary for a clear
understanding of the present invention; ,
Fig. 2 is a front elevation of the same;
The driving roller I2 is mounted on a shaft
I4 which projects through the" two walls of the
casing 2 and has frictionally held against its
end a gear wheel |5 by means of a thumb nut I6 ,
screwed on the screw-threaded projecting end 25
I‘! of the shaft.
'
The other end of the shaft I4 is supported in
abracket 29, a foot-2| of. which is held again
Fig. 3 is a fragmentary illustration 'of the the base plate I by means of screws 22. To in
‘
sure accurate positioning and to guard against 30
80 gearing;
Figs. 4, 5 and 6 are detailed views of the mount- 1 wear and end play of shaft I4, its bearing sur
face is not directly in the bracket 20 but in~a
ing of ‘one of the rollers; and
Fig. 7 is a cross-section along line '|--'| of bearing 23 which is screwed into the bracket 20
and through which projects the narrowed end
Fig‘. l.
24 of shaft l4. The bearing 23 engages the
The mechanism is mounted’ on a base plate I.
The clock mechanism, the details of which are
shoulderv formed by the shaft I4 and prevents
not shown, is within a casing 2 fastened to the
end play.
base plate.
_
-
.
The record is made on the usual paper Web ID,
40 a‘ supply of which is mounted on a roller 3. One
pin 4 of the roller is journaled in a side wall of
the casing 2, and the opposite pin 5 engages‘ a'leaf
spring 8 mounted on a forked bracket ‘I. The
.45
bracket 1 has a foot 8 which is fastened to the
base plate I by means of two screws 3. The
roller 3 as well as the two other rollers I2 and I3
over which the paper I0 passes, must be accu-_
rately positioned because otherwise the record,
7 as related to the time markings of the paper, will
50 be inaccurate. The smallest deviation of a roller
axis from the desired position may result in sub
stantial inaccuracy of the record. To make pos
-
.
The roller I2 is driven by motive power sup
plied from two clock springs (not shown) in
casing 2 and which may be wound up by means 40
of square-shouldered shafts 25 and 26, respec
tively. The clock mechanism is regulated by the
usual escapement device (not shown), the shaft
of which projects'through the housing 2 and
has fastened to its screw-threaded end 21 by 45
means of a knurled thumbscrew 28, a gear wheel
28. Power is transmitted‘ to the shaft I4
throughgears 28, 30, 3| and I5. It will be noted
that the gears '30, 3| which couple the, gear 29
to gear I5 do not have their centers in alignment 50
with the centers of gears I5 and 29. Further
more, the two gears Y30 and 3| are not mounted on
sible the exact positioning ‘of the relatively crude
ly made rollers, the following arrangement is
the side wall oi’ casing 2. These two’gears are
provided:
tively, on mounting plates 34 and 35, respectively.
'
mounted by means of screws 32 and 33, respec
2
-
2,188,110
v{These mounting plates are fastened to the side
wall of easing 2 by screws projecting through
two relatively large holes indicated in each
mounting plate. By holding in place these
mounting plates by means of screws which loose
ly ?t within the holes of the mounting plates,
and by having the mounting plates project be
products instead of the types usually encoun
tered in precision instruments.
What I claim is:
1. In combination, a shaft, means including
a ?rst gear carried by said shaft and a second
gear for driving said shaft, a common plate on
which said second gear is mounted and in which
yondthe circumference of the gears '30 and ill, ‘ said shaft is journaled, a third and a fourth in
the positioning of the mounting plates and,
10 therefore, of the gears, can be readily varied and
thus all backlash in the gearing taken up. Since
the gears cover the screws which pass through
the holes in the mounting plates, the latter can
not be tampered with after adjustment. ‘
The table I!‘ is of aluminum and to insure
termeshed gears for coupling said ?rst and- sec
ond gears, a separate mounting plate for each 10
of said third and fourth gears, the centersof the
latter being out of the line connecting the cen
ters of the ?rst and second gears, and means for
adjustably mounting said separate mounting
plates on the ?rst mentioned plate, whereby
its rigidity without sacri?cing lightness and. close adjustment may be readily effected between 15
without preventing ready access to supply spool
3, the end of the table I2‘ is formed into a tri-_
angular rib 40. This rib 40 partly overlies arm
20 4! projecting from and integral with the bracket
20. The arm 4| is bent out of the plane of the
bracket 20 and serves as a rigid support of the
table i2‘, to which the rib is fastened with two
screws. The opposite edge of the table I! is bent
down and is fastened to the side wall of casing 2.
The web 10 is provided with marginal perfo
rations such as 42 which engage pins 43 project
ing from the roller l2. Three pins are equally
spaced around the left-hand edge of roller l2
and three pins are similarly spaced on the right
hand edge of the roller l2, but staggered with re
spect to the pins on the left-hand edge. The
purposelof this arrangement is to reduce the fric
tion opposing the moving of the web l0 and yet
35 insure engagement of the perforations in one
edge or the other of the web by the pins and
thus prevent slippage of the web. I have found
that instead of the customary arrangement of
providing six pins near each edge of the roller
40 I2, three pins provided in each edge will pro
duce the same traction 'and reduce the resistance
offered by the pins to about one half.
‘
The take-off roller l3 has a shaft .45, one end~
of which is supported in the bracket 46, and the
45 other end is hollowed out as indicated at 41, and
has a pin 48 driven through it. Within the hol
lowed-out portions 41 ?ts the slotted end 49 of
a spring-driven-shaft which will drive shaft 45
through the pin 48. The mechanism (not
50 shown) for driving this shaft is also enclosed
within the casing 2 and in the drawing I have
shown only the winding stud 50 of this clock
mechanism.
each pair of intermeshing gears.
'
'
2. In a recording device, a web of paper hav
ing perforations along its two margins, a roller
for advancing said web having pins along its. 20
two edges projecting through the perforations
in the web, the pins along one edge being stag
gered with respect to the pins at the other edge
of the roller, a device continuously tending to
pull said web of paper away from said roller, 25
means for rotating said roller, said means in
cluding a gear fastened to said roller and a sec
ond gear, a third gear engaging the ?rst gear, a
fourth gear engaging the third and the second
gears, a mounting plate for each of said third 30
and fourth gears part of which projects beyond
the peripheries of said third and fourth gears,
said mounting plates having relatively large ap
ertures for adjustable mounting and which are
covered by the gears, the centers of the third 35
and fourth gears being out of alignment with the
centers of the ?rst and second gears.
3._I.n a recording device having a recording
web, .a roller for advancing said web, mechanism
for driving one end of said roller, a shouldered 40
stud projecting from the other end of said roller,
a bracket, and an externally screw-threaded
bearing in said bracket holding the end of said
stud- and engaging the shoulder thereon.
4. In a recording device having a supply of 45
recordingsweb, a roller for advancing web from'
said supply, a table of sheet metal covering said
supply and on which the advancing web rests,
said table being of substantially the same width
as said roller and having one edge turned down,
the turned-down edge being tapered towards an
end'of the table to give rlgidity to said table
50"
It will be seen that once the paper web iii is ' and still ‘permit ready access to said supply, a
positioned with respect to the usual recording
stylus (not shown), neither gear back-lash nor
bracket, a bearing in said bracket for said roller, 55
and a supporting arm ,for said table projecting
roller end-play will disturb the accuracy of the
adjustment. It will be further observed that
plane so that the turned-down‘ edge of the table
great accuracy” of adjustment is possible al
60 though the brackets, rollers, gears, etc., are mass
from said bracket, said arm being bent into a
overlies it.
I?
_
FRITZ IDEFFLER.
60
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