GB1087257A – Circuit arrangement to compare two information items
– Google Patents
GB1087257A – Circuit arrangement to compare two information items
– Google Patents
Circuit arrangement to compare two information items
Info
Publication number
GB1087257A
GB1087257A
GB17193/65A
GB1719365A
GB1087257A
GB 1087257 A
GB1087257 A
GB 1087257A
GB 17193/65 A
GB17193/65 A
GB 17193/65A
GB 1719365 A
GB1719365 A
GB 1719365A
GB 1087257 A
GB1087257 A
GB 1087257A
Authority
GB
United Kingdom
Prior art keywords
cores
winding
output
gate
core
Prior art date
1964-04-28
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB17193/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1964-04-28
Filing date
1965-04-23
Publication date
1967-10-18
1965-04-23
Application filed by International Standard Electric Corp
filed
Critical
International Standard Electric Corp
1967-10-18
Publication of GB1087257A
publication
Critical
patent/GB1087257A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06F—ELECTRIC DIGITAL DATA PROCESSING
G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
G06F7/02—Comparing digital values
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
Abstract
1,087,257. Comparators. INTERNATIONAL STANDARD ELECTRIC CORPORATION. April 23, 1965 [April 28, 1964 (3)], No. 17193/65. Heading G4M. In a magnetic core comparator, each of a set of cores represents a respective signification of one comparand. In Fig. one of a number of magnetic cores K1. . . Kn is set to represent one comparand, the other comparand being set up on relay contacts KU 1… KUL each of which connects an output winding L1 . . . LL threading a selection of cores either to earth or to a further winding SK which threads all the cores in the opposite sense. The other ends of the output windings pass to a diode OR gate. A positive-negative pulse is then used to reset the set core. If the two comparands are equal each output winding L1. . . LL either has a pulse induced in it cancelled by a pulse induced in the further winding SK or has no pulse induced in it and is earthed, but if the comparands are unequal, the OR gate will receive at least one pulse the polarity of which will depend on the direction of the inequality. The core arrangement may be a translator for use in automatic telephone exchanges and the comparator above used for checking its operation. Alternatively, the comparator may be used as a translator, the cores being switched in turn until equality is obtained with the relay contact settings. Fig. 3 (not shown) shows a modification (operating similarly) in which transistors replace the relay contacts. When conducting, they earth their respective output windings and backbias off diodes leading to the further winding. In Fig. 4 (not shown) the further winding is omitted but a pair of output windings is provided for each bit of one comparand, each core being threaded by one winding of each pair. Switches earth one winding of each pair and leave the other floating. The output windings feed an OR gate. In Fig. 5 (not shown), output windings leading to an OR gate thread selected cores of a first group and are connected in series with respective output windings threading cores of a nominally similar second group. Corresponding cores in the two groups are set and reset in such a way that output pulses from the two groups, produced on reset, cancel giving no output from the OR gate, unless a fault exists. The core groups may be translators in a telephone exchange system in which ease the translator outputs are used for call control only if they agree as above. The cores may be square-loop cores as above or may merely act as transformers.
GB17193/65A
1964-04-28
1965-04-23
Circuit arrangement to compare two information items
Expired
GB1087257A
(en)
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
DEST22045A
DE1197653B
(en)
1964-04-28
1964-04-28
Circuit arrangement for comparing two pieces of information
DEST22044A
DE1198091B
(en)
1964-04-28
1964-04-28
Circuit arrangement for comparing two pieces of information
DEST22043A
DE1197652B
(en)
1964-04-28
1964-04-28
Circuit arrangement for comparing two pieces of information
Publications (1)
Publication Number
Publication Date
GB1087257A
true
GB1087257A
(en)
1967-10-18
Family
ID=27212489
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB17193/65A
Expired
GB1087257A
(en)
1964-04-28
1965-04-23
Circuit arrangement to compare two information items
Country Status (7)
Country
Link
US
(1)
US3459959A
(en)
BE
(1)
BE663120A
(en)
CH
(1)
CH457919A
(en)
DE
(3)
DE1197653B
(en)
FR
(1)
FR1433062A
(en)
GB
(1)
GB1087257A
(en)
NL
(1)
NL6505402A
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4013216A
(en)
*
1975-06-09
1977-03-22
Sperry Rand Corporation
Punch check apparatus
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2879498A
(en)
*
1956-08-21
1959-03-24
Theodore A Kalin
Circuits for locating a binary digit within an interval
US2973506A
(en)
*
1958-06-10
1961-02-28
Bell Telephone Labor Inc
Magnetic translation circuits
US3143668A
(en)
*
1962-07-12
1964-08-04
Loy H Bloodworth
Power saving switch driver system
1964
1964-04-28
DE
DEST22045A
patent/DE1197653B/en
active
Pending
1964-04-28
DE
DEST22044A
patent/DE1198091B/en
active
Pending
1964-04-28
DE
DEST22043A
patent/DE1197652B/en
active
Pending
1965
1965-04-23
GB
GB17193/65A
patent/GB1087257A/en
not_active
Expired
1965-04-27
US
US451292A
patent/US3459959A/en
not_active
Expired – Lifetime
1965-04-27
CH
CH577665A
patent/CH457919A/en
unknown
1965-04-28
FR
FR14968A
patent/FR1433062A/en
not_active
Expired
1965-04-28
NL
NL6505402A
patent/NL6505402A/xx
unknown
1965-04-28
BE
BE663120D
patent/BE663120A/xx
unknown
Also Published As
Publication number
Publication date
DE1197652B
(en)
1965-07-29
DE1197653B
(en)
1965-07-29
DE1198091B
(en)
1965-08-05
NL6505402A
(en)
1965-10-29
US3459959A
(en)
1969-08-05
CH457919A
(en)
1968-06-15
FR1433062A
(en)
1966-03-25
BE663120A
(en)
1965-10-28
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