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Патент USA US3028094

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April 3, 1962
P. H. WEATHERILI.
3,028,084
REVERSIBLE COUNTING RELAY CHAIN
Filed sept. 11, 1958
/NVE/vroR
By P. H. WEATHER/LL
¿î c'
Arron/ver
United States Patent O.” fice
1
3,028,034
Patented Apr. 3, 1962
2
relay contacts generally are not shown adjacent to or in
3,028,084
relation with the magnetic core and winding, or windings,
Philip H. Weatherill, White Plains, N.Y., assigner to Bell
Telephone Laboratories, Incorporated, New York,
but are separated or detached therefrom. The core, as
may be seen from reference to the drawing, is repre
sented by a small rectangle and is identified by a func
REVERSIBLE COUNTING RELAY CHAIN
N.Y., a corporation of New York
Filed Sept. 11, 1958, Ser. No. 760,441
1 Claim. (Cl. 23S-92)
tional designation such, for example, as CUA, represent
ing count-up relay A. In the specification, the relay is
referred to also as CUA. On the drawing, each of the
contacts controlled by the relay is given a designation
This invention relates to a counting relay circuit and
particularly to a counting relay circuit. of the reversible 10 corresponding to that of the relay winding plus a numeral
which identifies the number of the contact. Thus, con
type.
The principal object of this invention is the improve
tact “1” on relay CUA will be designated CUA-I placed
in proximity to the contact.
ment of counting circuits.
Contacts which are closed when the relay is deener
Another object of the invention is the improvement
15 gized, known as “break contacts,” are represented by a
of reversible counting circuits.
single short line perpendicular to the line representing
Another object of this invention is to provide a count
the conductor, while contacts which are closed when the
ing circuit wherein, in response to electrical impulses
relay is energized, known as “make contacts,” are repre
received from a lirst or count-up control source the count
sented by two short crossed lines diagonally intersecting
ing circuit will count up, and in response to electrical
impulses received from a second or count-down control 20 the conductor line. A “break” and a “make” contact
connected together on one side, in close proximity to
source the counting circuit will count down.
each other, and with the designation “C,” indicate a set
Another object of this invention is to provide an
of “continuity” or “make before break” contacts. Lamps
improved reversible counting relay circuit having means
and resistors are shown in the conventional manner em
for indicating the registration of a zero count, an inter
25 ployed heretofore.
mediate count, or a predetermined maximum count.
A circle enclosing a minus sign indicates that the
A feature of this invention is a reversible counting
conductors teminating thereon are to be connected to a
relay circuit requiring but a single counting relay per
source of negative direct current.
counting stage.
Since, in many instances, the detached contact method
Another feature of this invention is circuitry for deacti
vating a reversible counting circuit when the count exceeds 30 of exposition results in a drawing wherein the circuit
elements have no apparent physical connection with each
a predetermined maximum.
other, it ís to be assumed that all of the subject-matter
Another feature of this invention is circuitry for auto
appearing within the contines of a single sheet of patent
matically resetting the count of a reversible relay counting
circuit to zero.
drawing constitutes a single patent ligure unless otherwise
Another feature of this invention is circuitry for pre 35 indicated. Speciñcally, in the present application all of
the information appearing on the single sheet of drawing
venting false operation of a reversible counting circuit
constitutes a single figure.
when electrical impulses are simultaneously received from
the count-up and the count-down control sources.
REVERSIBLE COUNTING CIRCUIT-_EXEMPLARY
The reversible counting relay circuit disclosed in the
EMBODIMENT
40
present application may be employed for counting in any
system, circuit, device or structure used in processing,
, An exemplary embodiment of the reversible counting
transmission or storage of quantities of uniform or
relay chain constituting the present invention is incor
non-uniform material or of items or conditions, wherein
porated in an automatic data processing system. In such
the number of items or conditions or lthe magnitude of
an automatic data processing system, the data to be
the quantities in process, transit or storage may vary 45 processed may be represented by suitable holes on a tape
with time, and where it is required that at any given
or card, or other suitable data storing device. Each com
time an indication be given of whether the number or
plete set of data consists of a plurality of related items
magnitude of the quantities, ,items or conditions in process,
of data recorded-in a continuous section of a record
transit or storage is zero, some intermediate value, or
medium and will hereinafter be referred to as the “unit.”
is in excess of a predetermined maximum. In short, the 50 As each unit is received by the system a circuit is closed
present invention is a reversible or in-out counter designed
in the source of up-count impulses UCS, thereby com
to afford a current indication of the net count and may
pleting an operating circuit for the count-up relay CUP,
be applied to perform this function without known limita
causing it to operate, and, by closing contacts CUP-1,
tion except as to the speed of operation of the fastest
inaugurates the counting upward by the circuit.
available relay having the required number of contacts. 55
REVERSIBLE COUNTING OPERATION
This speed presently is about tive milliseconds. The re
versible relay count herein disclosed by way of example
General
is capable of counting at a speed of about two-hundred
COUNT-IN OF UNITARY QUANTITIES
in-out total operations per second.
The reversible counting relay circuit herein disclosed, 60 The group of relays COA through C7A is provided as
in one of its embodiments and in one of its applications,
a part of the circuitry of a data processing system, and is
is disclosed also in Patent 2,978,534 for an automatic
employed to count all received units and to count the
telegraph line switching system, which patent, ñled simul
units out, as each unit is processed or is disposed of in its
taneously herewith issued on April 4, 1961, to F. B.
turn.
Crowson, G. A. Locke and R. R. MacLaughlin.
65
As each unit is processed and is thereby removed from
storage or disposed of, a circuit is closed in the source of
EXPLANATION OF DETACHED CONTACT
count-down impulses DCS, thereby completing an oper
CIRCUIT SYMBOLS
ating circuit for the count-down relay CDP.
The “detached contact” method of exposition used in
When there is no unit in storage, the automatic gate
Patent No. 2,722,675 granted to I. Michal and R. E. 70
circuit
AGC is inoperative, but when a unit is received
Staehler, November l, 1955, has been adopted for use
by or is inserted into storage, a circuit is closed in the
in this disclosure. In the detached contact method, the
3,028,084
3
4
automatic gate circuit AGC, thereby completing an oper
ating circuit for automatic gate relay AG.
Circuits such as diagrammatically indicated by the
rectangles UCS, DCS and AGC are disclosed in the joint
patent mentioned in the foregoing.
COUNT-IN, ONE
As soon as the first unit has been received by the data
processing system, lan operating circuit is Completed in
the source of up-count impulses` UCS, causing relay CUP
to operate and lock up to ground through a locking circuit
The zero count condition of the group of relays CGA
(not shown).
through C7A which comprise the reversible counting
'
Relay CUP operated:
Extends ground through contacts CUP-1, CDAA-l,
CDA-2, and the winding of relay CUA to battery, causing
chain circuit is with the relay CGA operated and with
relays C1A through C7A released.
DETAILED OPERATION OF COUNTI‘NG CIRCUIT 10 relay CUA to operate.
Relay CUA operated:
A detailed description of the operation of the reversible
Locks up to ground through contacts CUA-2 and
counting chain circuit follows.
CUP-1 (operated);
If a unit is present, the presence of the unit will permit
the operation of the circuits of the automatic gate circuit
At contact CUA~3, opens the operating circuit of re
lay CDA;
AGC, and the automatic gate relay AG will be operated.
In order to clarify the description of the circuit opera
tion, it will be advantageous >at this point to assume, for
At contact CUA-4, prepares an operating circuit for
relay CDSA;
At contact CUA-5r, partially closes the operating cir
the moment, that the power has been turned oil, and that
cuit for the primary winding of relay C1A;
all of the relays are released.
20
Extends ground through contact CUA-6 and the wind
This description assumes, at this point, that there is no
ing of relay CUAA to battery, causing it to operate;
unit present; and that the absence of any unit has caused
At contact CUA-7, opens the operating circuit for re
the automatic gate circuit AGC to open the operating
lay CDAA;
circuit for relay AG, causing it to release. Assuming
At contact CUA-1, provides a ground for the locking
now that the power is again turned on, ground is extended 25 circuit
for the secondary windings of relays CGA through
C7A.
through continuity contact AG-l (released) and the pri
mary winding of relay CGA to negative battery, causing
Relay CUAA operated:
relay CGA to operate, thereby “priming” the counting
relay chain for further operation.k
‘
At contacts CUAA-1, CUAA-‘2, CUAA-3, CUAA-4,
CUAA-5, CUAA-6, CUAA-7, `and CUAA-8, opens one
For the moment, the description will be conñned to 30 of
the locking circuits for the secondary windings of re
the operation of relay CGA.
lays CGA, C1A, CZA, CSA, C4A, CSA, C6A, and C7A,
respectively;
ZERO COUNT
At continuity contact CUAA-9, further opens the op
Relayk CGA operated:
Prepares a locking path through its secondary winding, 35 erating circuit for relay CDA;
At continuity contact CUAA-l0, partially closes an
contacts CGA-1, CUAA-1 (released), and AGeZ` (re
other operating path for relay CDSA;
leased) to ground;
At contact CUAA~11, completes the ñnal circuit clo
At continuity contacts CGA~2 cuts olii the locking cir
sure whereby ground is extended through contacts AG-3,
cuit for the secondary winding of relay C1A from the
path through contacts C1A-1, CUAA-2, CGA-2 and con 40 CUA-S, CUAA-1l, CGA-5, and the primary winding of
relay C1A to battery, causing relay C1A to operate.
tinuity contact AG-Z to ground; '
'
Relay C1A operated:
At continuity contact CGA-S partially closes a substi
At
continuity contact C1A-2, opens the locking cir
tute locking circuit from the secondary winding o-f relay
cuit `for the secondary winding of relay CGA, which lock
C1A extending through contacts C1A-1, CUAA-2,
ing circuit comprises _contacts CGA-1, CDAA-Z, ClA-Z,
CGA-3, and CUA-l, or CDA-1 to ground, the latter two
45 and AG-Z to ground;
contacts being open at this time;
At continuity contact C1A-3, closes a substitute lock
At contacts CGA-4 opens the locking circuit of the
inlg circuit for the secondary winding ofrelay CGA ex
secondary winding of relay CUBA;
tending through contacts CGA-l, CDAA-Z, C1A-3, and
At contact CGA-5 partially prepares an operating cir
CUA-l (operated) to ground;
cuit for the primary winding of relay C1A for the
50
Locks up to ground through contacts C1A-l,
count-up;
CDAA-ô‘, C2A-2, and continuity contact AG-Z (oper
At contacts CGA-7 completes a circuit whereby ground
ated) to ground;
is extended through contacts C1A-9, CGA-7, and lamp (l
At contact C1A-4, prepares an operating circuit for
to negative battery, causing lamp G to light, thereby indi
the primary winding of relay C2A for the count-up in the
cating that a zero count is now registered in the reversible
counting relay chain;
55
At contact C1A-6', prepares an operating circuit for
At contact CGA-8 opens the circuit for lamp 1, thereby
making it impossible for lamp 1 to light until relay COA
shall have released. Following this, when a unit is re
ceived by or inserted into the system, a circuit is com
pleted in the automatic gate circuit AGC, causing relay
counting circuit;
the primary winding of relay CGA for the count-down
in the counting circuit;
At contact C1A-7, partially closes a circuit to ground
60
for lamp ll;
At contact C1A-9, opens the circuit for lamp G, there
by making it impossible for lamp G to light until relay
C1A shall have released;
Locks up to ground through a locking circuit (not
At contact C1A-1G, opens the circuit for lamp 2, there
shown), and remains locked up so long as the power sup 65 by making it impossible for lamp 2 to light until relay
AG to operate.
Relay AG operated:
ply remains turned on, or until the supply of units has
been exhausted, which will open locking circuit for re
lay AG, causing it to release;
At contact AG-S partially prepares an operating cir
C1A shall have released.
Shortly after the first unit has been received by or in
serted into the system, the circuit in the source of count
up impulse UCS is opened, thereby causing relay CUP
cuit for the primary winding of relay C1A;
70 to release.
At continuity contact AG-2 ñrst provides ground for
With relay CUP released, contact CUP-1 opens and
the locking circuits for the secondary windings of relays
disconnects locking ground from the winding of »relay
CGA through C7A;
`
CUA, causing relay CUA to release. When relay CUA
At continuity contact AG-l subsequently opens the
releases, contact CUA-1 opens and disconnects locking
operating circuit for the primary winding of relay CGA. 75 ground from the circuit extending through contacts
3,028,084
5
6
CUA-1, C1A-3 (operated), CDAA--2, CßA-l, and the
secondary winding of relay COA to battery, causing relay
by making it impossible for lamp 3 to light .until relay
CZA shall have released.
COA to release.
A short time later, with contact CUA-6 open, relay
Shortly after the second unit has been received by or
inserted into the system, the circuit in the source of
CUAA will release, and the circuit Will be in the condi
count-up impulses UCS is opened, :thereby causing relay
tion in which relay C1A is operated and relay COA is
released.
With relay COA released, relay C1A operated, and
relay C2A released, ground is extended through contacts
COA-8, C2A-9, C1A-7, and lamp 1 to battery, causing 10
CUP to again release.
lamp 1 to light, thereby indicating that a count of one is
now registered in the counting chain circuit.
COUNT-IN, TWO
Now let it be assumed that a seco-nd unit has been re
ceived by the system. An operating circuit is again com
pleted in the source of up-count impulses UCS, causing
relay CUP to again operate.
Relay CUP operated:
Extends lground through contacts CUP-1, CDAA-l,
CDA-2, and the winding of relay CUA to battery, caus- l,
15
With ‘relay CUP released, contact CUP-1 again opens
and disconnects looking ground from the winding of
relay CUA, causing relay CUA to release. When relay
CUA releases, contact CUA-1 opens and disconnects
locking ground from the circuit extending through con
tacts CUA-I1, C2A-3 (operated), CDAA-3, C1A-1, and
the secondary Winding of relay C1A =to battery, causing
relay C1A to release.
A short time later, relay CUAA will release and the
circuit will be in the condition in which relay C2A is
operated and relays COA and C1A are released.
With relay C1A released, relay C2A operated, and
relay C3A released, ground is extended through contacts
20 C1A~-10, CSA-9, C2A-7, and lamp 2 to battery, causing
lamp 2 to light, thereby indicating that a count of two
is now registered in the counting chain circuit.
ing relay CUA to operate.
Relay CUA operated:
COUNT-IN, THREE TO SEVEN-
Locks up to ground through contacts CUA-2 and
CUP-1 (operated);
At contact CUA-3, opens the operating >circuit of relay
CDA;
At contact CUA-4, prepares an operating circuit for
relay CDSA;
25
For each complete unit received by or inserted into
the system, the relay CUP will operate and release and,
in the manner above described, will cause the successive
operation of the relays CBA through C7A.
.
At contact CUA-5, partially closes the operating cir
cuit for the primary winding of relay C2A;
Extends ground through contact CUA-6 and the wind
ing of relay CUAA to battery, causing it to operate;
At contact CUA»7 opens the operating circuit for relay
CDAA;
At contact CUA-1, provides a ground for the locking
circuit for the secondary windings of relays COA through
C7A,
BACKLOG ALARM
If more than seven units are received by the system
and are counted in before being counted out, when relay
CUP again operates in response to the presence of the
eighth unit, ground will be extended through contacts
35 AG-3, CUA-5, CUAA-11, COA-6, C1A-5, CZA-S,
CBA-5, C4A-5, CSA-5, C6A-5, C7A-S, and the primary
Awinding of relay CUBA to battery, causing relay CUBA
to operate.
Relay CUAA operated:
Relay CUBA operated:
,
At contacts CUAA~1, CUAA-4, CUAA-3, CUAA-4, 40
Locks up'to ground through contacts CUBA-1 and
CUAA-5, CUAA-6, CUAA-7, and CUAA-8, opens one
COA-4 (released);
of the locking circuits for the secondary windings of -re
lays CUA, C1A, CZA, CSA, C4A, CSA, C6A, and C7A,
respectively;
At continuity contact CUBA-2, provides for the re
lease of relay C7A;
Extends ground through contacts CUBA-4, C7A-10,
At continuity contact CUAA-9', further opens the op
and
the Backlog lamp BKG to battery, causing lamp
45
erating circuit for relay CDA;
BKG to light to apprise the »attendant of an accumula
At continuity contact CUAA-16, partially closes an*
other operating path for relay CDSA;
tion or backlog of more than seven units;
At contact CUAA-11, completes the íinal circuit clo
sure whereby ground is extended through contacts AG-3,
lamp 7.
At contact CUBA-S, opens the circuit to ground for
the above-described condition all further count
CUA-5, CUAA-11, COA-6, C1A-4, and the primary 50 ingUnder
will cease, and the counting circuit will remain
winding of relay CZA to battery, causing relay CZA to
operate.
Relay CZA operated:
in the condition above described until all of the units
are counted out. When all of the units have been
counted out, the circuit in the automatic gate circuit
At continuity contact CZA-Z, opens the locking cir
cuit for the secondary Winding of relay C1A, which lock 55 lAGC will open, thereby opening the operating circuit for
relay AG which will release. Relay AG in releasing
ing circuit comprises contacts C1A-1, CDAA-S, C2A-2,
>Will open continuity contact AG-2, thereby disconnect
and AG-Z to ground;
ing locking ground from the secondary windings of re
At continuity contact C2A-3, closes a substitute lock
lays
COA through C7A, and the counting circuit will be
ing circuit for the secondary Winding of relay C1A eX
released. At the same time, ground is extended through
tending through contacts C1A-1, CDAA-3, C2A-3, and 60 continuity
contact AG~1, and the primary winding of
CUA-1 (operated) to ground;
relay
CGA
to battery, causing relay COA to reoperate,
Locks up through contacts C2A-1, CDAA-4, C3A~2,
thereby
again
lighting lamp 0 to indicate a Zero registra
and AG-2 (operated) to ground;
tion in the counting circuit.
At contact C2A-4, prepares au operating circuit for
the primary winding of relay CSA for the count-up in 65
COUNT OUT OF UNITARY QUANTITIES
the counting circuit;
At contact C2A~6, prepares an operating circuit for
the primary winding of relay C1A for the count-down in
the counting circuit;
Now let it be assumed that, in the manner previously
described, two units have been counted, and that re
sponsive thereto, relay CZA is operated, thereby indicat
At contact C2A~-7, partially closes a circuit to ground 70 ing the condition.
Now, at this time, let it be lassumed that one of the
for lamp 2;
units which has been counted in has been counted out.
At contact C2A-9, opens the circuit for lamp 1, there
A circuit is now completed in the source of count-down
by making it impossible for lamp 1 to light until relay
impulses DCS, causing relay` CDP to operate. Ground
CZA shall have released;
At contact C2A-10, opens the circuit for lamp 3, there 75 is extended through contacts CDP-1, CUAA-9, CUA-3,
3,028,084
8
CGA-8, C2A-9, C1A-7, and lamp 1 to battery, causing
lamp 1 to light.
and the winding of relay CDA to battery, causing relay
CDA to operate.
CDA-3, and the winding of relay CDAA to battery,
Now, let it be assumed that the remaining one of the
units has been processed. A circuit is again completed
in the source of count-down impulses DCS, causing relay
causing relay CDAA to operate;
CDP to again operate.
Relay CDA operated:
Extends ground through contacts CUA-7 (released),
.
Ground is extended through con
tacts CDPa-l, CUAA-9, CUA-3, and the winding of relay
CDA to battery, causing relay CDA to again operate.
relay CUSA;
Relay CDA operated:
-At contact CDA-»1 provides a ground for the >locking
circuit for the secondary windings of counting relays. 10 Extends ground through contacts CHA-7 (released),
CDA-3, and the winding of relay CDAA to battery,
COA through C7A;
causing relay CDAA to operate;
At contact CDA-2 opens the operating circuit for
At Contact CDA-4 prepares an operating circuit for
At `contact CDA-4, prepares an operating circuit for
relay CUSA;
At contact CDA~5 partially closes the count-down
At contact CDA-1, provides a ground for the locking
circuit for the primary winding of any one of the count 15
»circuit for the secondary windings of counting relays COA
ing relays COA through CGA that it may be desired to
relay CUA;
through C7A;
operate.
At contact CDA-2, opens the operating circuit for
`Relay CDAA operated:
relay CUA;
At contacts CDAA-«2, CDAA-3, CDAA-4, CDAA-5,
CDAA»6, CDAA~-7, CDAA~S, and CDAA-9, opens 20 At contact CDA-5, partially closes the count-down cir
cuit for the primary windings of any one of the counting
one of the locking circuits for the secondary windings
relays CGA through CGA that it may be desired to
of relays COA, C1A, C2A, CSA, C4A, CSA, C6A, and
operate.
C7A, resectively.
Relay CDAA operated:
At contact CDAA-1, further opens the operating cir
cuit of relay CUA;
At contact CDAA~10, partially closes another operat
ing path for relay CUSA;
25
At contacts CDAA-2, CDAA~3, CDAA-4, CDAA-S,
CDAA-6, CDAA-«7, CDAA-8, and CDAA-9, opens one
of the locking circuits for the secondary windings of
relays CGA, C1A, C2A, CSA, C4A, CSA, CGA, and C7A,
At contact CDAA~11, closes the iinal count-down
respectively;
operating path for the primary winding of any one of
the counting relays COA through C6A that it may be .30 At contact CDAA-1, further opens the operating circuit
desired to operate;
for relay CUA;
-
At contact CDAA-l0, partially closes another operat
Extends ground through contacts CDA-5, CDAA-t1,
C7A-8, C6A-8, CSA-8, C4A-8, CSA-«8, CZ-A-6, and
ing path for relay CUSA;
and AG-Z (operated) to ground;
At contact CIAA, prepares an operating path for the
primary winding of relay CZA for the count-up in the
At continuity contact CtlA-2, cuts olf the locking cir
cuit for the secondary winding of relay C1A from the
At contact CDAAAI, closes the final count-down
the primary winding of relay C1A to battery, causing
35 operating path for the primary winding of any one of the
relay C1A to operate.
counting relays COA through CáA that it may be desired
Relay C1A operated:
to operate;
At continuity contact C1A-2, opens the locking cir
Extends ground through contacts CDA-5, CDAA-11,
cuit for the secondary winding of relay CZA, which lock
C7A-8, CoA-8, CSA-8, C4A-8, CSA-8, CZA-S, C1A-6
ing circuit comprises contacts CZA-l, CUAA-S, C1A-2,
40 (operated), and the primary Winding of relay COA, to
and continuity contact AG-Z to ground;
battery, causing relay CGA to operate.
At continuity contact C1A-3, closes a substitute lock
Relay CoA operated:
ing circuit for the secondary windingof relay CZA ex~
Prepares a locking path, through its secondary winding,
tending through contacts CZA-l, CUAA-3, C1A-3, and
contacts CdA-1, CUAA-l (released), and AG-Z (oper
CDA-1 (operated) to ground;
Locks up through contacts C1A-1, CUAA-Z, CtìA-î, 45 ated), to ground;
path through contacts C1A-1, CUAA-Z, CGA-2, and
counting circuit;
At contact C1A-6, prepares an operating circuit for 50
the primary winding of relay CtlA for the vcount-down iri
the counting circuit;
At contact C1A-7, partially closes a circuit to ground
for the one count lamp 1;
At contact C1A-9, opens the circuit to ground for
lamp 0;
At contact C1A-10, opens the circuit to ground for
lamp 2, causing it to be extinguished.
AG_2 to` ground;
At continuity contact COA-3, closes a substitute lock
y ing circuit for the secondary winding of relay C1A ex
tending through contacts C1A-1, CUAA-Z, COA-3, and
CDA-d, to ground;
At contact COA-4, opens the locking circuit of the
secondary winding of relay CUBA;
At contact CGA-5, partially prepares an operating cir
cuit for the primary winding of relay C1A for the count
up in the counting circuit;
Shortly after the processing of a stored unit currently
At contact CÜAJI', partially closes a circuit to ground
being processed has been concluded, the circuit in the 60 for lamp G;
source of count-down impulses is opened, thereby causing
At contact CGA-ä, opens the circuit to ground for
relay CDP to release.
lamp 1, causing it to be extinguished.
With relay CDP released, contact CDP-l opens and
Shortly after the processing of the last unit has been
disconnects operating ground from the winding of relay
concluded, the circuit in the source of count-down irn
CDA, causing relay CDA to release. When relay CDA 65 .pulses is opened, thereby causing relay CDP to release.
releases, Contact CDA-.1r opens and disconnects locking
With relay CDP release-d, contact CDP~1` opens and
ground from the circuit extending through contacts
disconnects operating ground from the winding of relay
CDA-1, C1A-3, CUAA-S, CZA-l, and the secondary
CDA, causing relay CDA to release.
winding of relay C2A to battery, causing relay CZA
to release.
A short time later, relay CDAA will release, and the
circuit will be in the condition in which relay C1A is
Relay CDA, in releasing, opens contacts CDA~1 and
70 CDA-3 which causes the release of relays C1A and
CDAA, respectively, leaving the circuit in the condition
where relay CUA only is operated.
operated and relay CGA is released.
With relay CGA operated, and relays C1A through C7A
With relay CGA released, relay C1A operated and relay
CZA released, ground is extended through contacts 75 released, ground is extended through contacts C1A-9,
3,028,084
9
10
COA-7, and lamp 0 to battery, causing lamp 0 to again
through contact CUA-6, causing relay CUAA to operate.
light.
The operation of relay CUAA causes ground to be ex
tended through contacts AG-3, CUA~-'5, and CUAA-«11,
The counting circuit has now been restored to the zero
count condition.
so that the counting circuit is now enabled to operate the
next higher numbered relay.
Y Utilizing relays C1A, C2A, C3A, C4A, CSA, C6A, and
When slow-to-release relay CUSA shall have fully re
C7A in the above-described manner, unitary quantities
leased, contact CUSA~-1 opens the operating path to
can be counted in and out of the counting circuit, pro
ground for relay CUA, causing relay CUA to release.
vided that the net number of unitary quantities counted
If both relays `CDP and CUP operate at exactly the
in, at any cycle of operation, does not exceed seven, which
is the capacity of the counting circuit.
10 same time, the operation of relay CUA will take preced
ence over the operation of relay CDA. The reason for
An anti-contention circuit is provided to guard against
false operation of the counting relays when the associated
this is because relay CUA, when operated, locks up to
data processing system attempts to count-in and count-out
ground through contacts CUA-2 and CUP-1, Whereas
simultaneously. The description of the operation of the
relay CDA is not provided with a locking circuit. The
count-down operation will then be delayed, but will take
anti-contention circuit follows.
place after a short delay interval.
SIMULTANEOUS COUNT-IN AND COUNT-OUT
In the exemplary disclosure of the reversible counting
Let it now be assumed that the relay CDP operates in
relay circuit, as above described, a seven-stage counting
the manner previously described, while relay CUP is
chain is shown. This is not to be construed as a limita
still operated.
20 tion, as it will readily be apparent to one skilled in the
If, at this moment, relays CUA and CUAA are oper
art that counting relay chains in accordance with the pres
ated, then relay CDA cannot operate because its operating
ent invention may be constructed to employ a greater or
circuit is opened at contact CUA-3, but ground extended
less number than seven counting stages.
through contact CDP-1, parallel-connected contacts
It is to be understood that other equivalent apparatus
CUAA-10 and CUA-4, and the winding of relay CDSA 25 and instrumentalities may be employed without materially
to battery will cause relay CDSA to operate.
departing from the spirit and scope of the invention.
Relay CDSA operated:
What is claimed is:
~
Locks up to ground through contacts CUA-4 and
In combination in a reversible counting system, a first
CDSA-1.
source of electrical impulses, a second source of electrical
Now let it be assumed that relay CUP releases, open 30 impulses, a multistage counting circuit, said circuit having
ing contact CUP-1 and causing relay CUA to release.
a single counting relay per counting stage, a first means
Relay CUA, in releasing, opens contact CUA-6, causing
comprising said relays in said counting circuit responsive
relay CUAA to release.
to each impulse from said first source to thereby unitarily
Let it be assumed that when both relays CUA and
increase the count in said circuit, a second means com
CUAA are released, the count-down impulse has ceased, 35 prising said relays in said counting circuit responsive to
thus releasing relay CDP. However, at this time, ground
each impulse from said second source to thereby unitarily
is extended through contacts CDSA-1, CUAA-9, -CUA-3,
decrease the count in said counting circuit, means respon
and the winding of relay CDA to battery, causing relay
sive to said relays for indicating the numerical value of
CDA to operate. The release of relay CUA, at contact
the count registered in said counting circuit, means re
CUA--4, opens the locking circuit for relay CDSA which,
being slow to release, does not immediately release. The
operation of relay CDA and the release of relay CUA ex
tends ground through contacts CUA-7 and CDA-3, caus
sponsive to said relays for resetting said counting cir
cuit to zero, means responsive to said relays for giving an
alarm when the count in said counting circuit exceeds a
predetermined maximum, an anti-contention circuit con
ing relay CDAA to operate. The operation of relay
nected to said relays and responsive to the simultaneous
CDAA closes ground through contacts CDA-5 and 45 reception of impulses from said first and second sources
CDAA-11 so that the counting circuit is now enabled to
for preventing the simultaneous application of impulses
count-down.
from said sources to said first and second means, said
When slow-to-release relay CDSA shall have fully re
anti-contention circuit including means responsive to the
leased, contact CDSA-l opens the operating path to
simultaneous reception of a first impulse from either one
ground for relay CDA, causing relay CDA to release. 50 of said lirst and second sources and a second impulse from
'If relays CDA and CDAA are operated first, then re
the other one of said sources for positively storing an in
lay CUA cannot operate because its operating circuit will
dication that a second impulse has been applied to said
be opened at contact CDA-«2, but ground extended
system from said second source even if said second im
through contacts CUP-1, parallel-connected contacts
pulse is non-persistent and for delaying the operation of
CDAA-10 and CDA-4, and the winding of relay CUSA 55 the means responsive to said second impulse until the
to battery will cause relay CUSA to operate.
means responsive to said ûrst impulse has completed its
Relay CUSA operated:
operation.
Locks up to ground through contacts CDlA-4 and
CUSA-1.
References Cited in the ñle of this patent
Now let it be assumed that relay CDP releases, open 60
UNITED STATES PATENTS
ing contact CDP-„1 and causing relay CDA to release.
Relay CDA, in releasing, opens contact CDA-3, causing
2,008,909
Hershey _____________ __ July 23, 1935
relay CDAA to release.
Let it be assumed that when both relays CDA and
CDAA are released the count-up impulse has ceased, 65
thus releasing relay CUP. However, at this time, ground
is extended through contacts CUSA-1, CDAA-1, CDA-2,
and the winding of relay CUA to battery, causing relay
CUA to operate. The release of relay CDA, at contact
CDA-4, opens the locking circuit for relay CUSA which, 70
being slow-to-release, does not immediately release. The
operation of relay CUA causes ground to be extended
2,417,831
2,636,078
2,768,334
2,775,726
Kinkhead ___________ __ Mar.
Marsh ______________ __ Apr.
Vande Sande _________ __ Oct.
De Kroes et al. _______ __ Dec.
25,
21,
23,
25,
1947
1953
1956
1956
2,831,635
2,883,588
‘Strandberg ___________ __ Apr. 22, 1958
Leonard ____________ _- Apr. 21, 1959
468,040
Great Britain _________ __ June 28, 1937
FOREIGN PATENTS
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