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Патент USA US2111117

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March 15, 1938.
<;_ D, LAKE
Filed March 20, 1934
Patented Mar. 15, 1938
Clair D. Lake, Binghamton, N. Y., asslgnor to-ln
tanaticnal Business Machines Corporation,
New York, N. Y., a corporation of New York
Application March 20; 1934, Serial No. 716,465
40laims. (Cl. 200-46)
This invention relates to analyzing devices for pushed over toward one side by the grooves in
perforated record controlled machines, such as, the surface of the roller. The strands then ride
record sorting and tabulating machines. More over the raised portion between the grooves as
particularly, it relates to machines of this nature shown at 4a in Fig. 4, and drop into the next
where the records are analysed by electric brushes
while the records are in motion.
Another object is to decrease failure of the
sensing brushes to close a circuit through the
perforations in the records.
in the card in Fig. 5.,
Another object is to produce an analyzing or
" sensing device adapted to overcome the eil’ects
of dust particles which may tend to prevent the
strands of the sensing brush from contacting
with the cooperating conductor.
Fig. l is a sectional side elevation of a portion
of a machine adapted to analyse perforated
records while the records are in motion;
Fig. 2 is a fragmentary enlarged detail show
ing a sensing brush and a metallic roller adapted
to cooperate with the brush for closing an elec
tric circuit;
Fig. 3 is a fragmentary sectional detail, on a -
'much larger scale, of the contacting roller; '
Fig. 4 is a sectional detail taken on line 4—4
of Fig. 2;
In Fig. 3 the grooves 9 are shown as rounded.
This will permit the individual wires of the
brushes to ride gradually up and down the sides
of the grooves without losing contact, although
this specific shape of groove is not essential.
While the grooves are shown as running con
Referring to the drawing:
11g. 5 is a'detail similar to Fig. 2, slightly
In Figs. 2 and 4, the brushes are shown as made
up of closely placed strands of wire. In Fig. 5
the spacing between the several strands is ex
aggerated and onlya few of the wires are shown
in order to show. the action of the individual
wires. Also, while the long narrow perforation
is shown in Fig. 2, a round perforation is shown
One of the objects of the invention is to im
prove upon analyzing or sensing devices of this
nature by reducing the burning of the contacting
adjacent groove.
stantly in one direction, they might be made to
cross each other so that the separate wires of the
sensing brushes would tend to be separated in
both directions. Also other forms of irregulari
ties may be provided on the surface of the roller
to cause agitation of the brush wires.
' In existing machines, where a roller having a
smooth surface is employed, to cooperate with
the sensing brushes 4, the several strands of
wire in the brushes tend to follow the same paths
repeatedly around the roller. Thus, when spark
ing tends to take place between the brushes and
the roller, burning of the roller occurs along
In the drawing, the record cards I are adapted
to be fed one at a time by a card picker 2 to feed
. rollers 3 which carry the card. downwardly, be
fixed lines. and the wires of the brushes follow
these lines. Due to the tendency to crystallize
tween the sensing brushes 4 on one side of the
card, and a cooperating roller 5 on the other side.
The train of gears i which serve to operate the
card feeding mechanism also drives a gear 1
40 which meshes with a gear I attached to the con
contacting surfaces are reduced so that the full
power of current does not always pass for the full
counterclockwise direction as viewed in Figs.
wires in the brushes, prevents the burning of
fixed lines around the roller and obviates the
tendency of vthe wires of the brushes. to follow
along such lines, the conducting properties of the 3; ‘
duration of contact through the perforation in
the card, and the accuracy of the operation of
the machine is hampered. With the contact
tact roller 5 to cause the latter to turn in‘ a ' roller disclosed here, the constant shifting of the
1 and 4.
As shown in Fig. 2, the contacting surface of
the roller 5 is provided with grooves 9 out
diagonally around the face of the roller, as in the
case of screw threads.
As the card i feeds down
wardly, the brush 4 is held out of contact with
the roller 5 until a perforation ll, through the
50 card, passes between the brush and the roller.
The brush then reaches through the perforation
and engages the roller to close .an electric cir
cu'it for controlling the machine. As the roller
"is turningdownwardly,asviewedin Fig. 2, the
55 strands of wire which make up the brush are
any such ?xed burned lines.
In the operation of machines of this kind, small
particles of dust including paper dust are
dragged by the brushes along the surface ofthe
card and then through the perforation onto the
surface of the contact roller. Where the surface 50
of the roller is smooth the brushes tend to drag
these particles around the surface of the roller.
These particles tend to separate the brush wires
from the roller and this in turn tends to draw
va spark. Also the dust particles which have 55
lifted the wires off the roller to produce the spark
are burned by the spark. This tends to cause
fusing of foreign substance in the surface of the
roller and impairs the conductivity of the roller.
The agitation of the brush wires produced by the
grooves or irregularities in the surface of the
roller, cause the dust particles to be thrown off,
and this reduces sparking and burning on the
surface of the roller. In tests, it has been found
that where my improved roller is used, a much
larger number of cards may be run through the
machine before evidence of burning is apparent,
than where smooth rollers are used.
While there has been shown and described and
pointed out the fundamental novel features of
the invention as applied to a single modi?cation,
it will be understood that various omissions and
substitutions and changes in the form and de
tails of the device illustrated and in its opera
tion may be made by those skilled in the art with
out departing from the spirit of the invention.
It is the intention, therefore, to be limited only as
indicated by the scope of the following claims.
What is claimed is:
1. In a record analyzing device, a perforation
sensing brush comprising a plurality of in
dividual conducting strands, a roller adapted to
cooperate with said brush, said roller having an
irregular surface adapted to cause agitation of
the sensing brush thereby displacing the said
strands relatively to each other.
2. In a perforated record analyzing device, a
stranded wire brush adapted to reach through
perforations in a record, a rotatable roller adapt
ed to be engaged by such brush when it reaches
through a perforation, said roller being provided
with diagonal grooves around its surface for
causing relative lateral movement of the in 10
dividual strands of the brush.
3. In a device of the class described, a rotatable
contact roller, an electric contact brush compris
ing a plurality of individual conducting strands
adapted to reach through perforations in a pass 15
ing record to engage said roller, and means for
causing lateral movement of the brush with re
spect to the roller to cause the brush to follow
an irregular course around the surface of the
roller thereby effecting displacement of the said 20
strands with respect to each other.
4. In a record analyzing device, a sensing brush
comprising a plurality of strands of wire, a mov
able contact element cooperating with said brush,
and means disposed on said contact element to
provide predetermined movements of the said
strands with respect to each other.
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