GB1063993A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1063993A – Improvements relating to automatic telephone exchange systems
– Google Patents

GB1063993A – Improvements relating to automatic telephone exchange systems
– Google Patents
Improvements relating to automatic telephone exchange systems

Info

Publication number
GB1063993A

GB1063993A
GB26268/63A
GB2626863A
GB1063993A
GB 1063993 A
GB1063993 A
GB 1063993A
GB 26268/63 A
GB26268/63 A
GB 26268/63A
GB 2626863 A
GB2626863 A
GB 2626863A
GB 1063993 A
GB1063993 A
GB 1063993A
Authority
GB
United Kingdom
Prior art keywords
relay
busy
pulse
circuit
tone
Prior art date
1963-07-02
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
GB26268/63A
Inventor
Bloomfield James Warman
John Herbert Marshall
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.)

Associated Electrical Industries Ltd

Original Assignee
Associated Electrical Industries Ltd
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.)
1963-07-02
Filing date
1963-07-02
Publication date
1967-04-05

Priority to BE649937D
priority
Critical
patent/BE649937A/xx

1963-07-02
Application filed by Associated Electrical Industries Ltd
filed
Critical
Associated Electrical Industries Ltd

1963-07-02
Priority to GB26268/63A
priority
patent/GB1063993A/en

1964-06-15
Priority to US375009A
priority
patent/US3347993A/en

1964-06-27
Priority to DE19641437498
priority
patent/DE1437498A1/en

1964-07-02
Priority to NL6407528A
priority
patent/NL6407528A/xx

1967-04-05
Publication of GB1063993A
publication
Critical
patent/GB1063993A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04Q—SELECTING

H04Q3/00—Selecting arrangements

H04Q3/0016—Arrangements providing connection between exchanges

Abstract

1,063,993. Automatic exchange systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 26, 1964 [July 2, 1963], No. 26268/63. Heading H4K. In an exchange system employing registers for storing called lines’ identities, at least one additional register is provided and seized when all normal registers are engaged to store the identity of the calling junction and initiate connection of busy tone thereto. As described, the exchange system of Specification 1,063,991 is provided with an extra dummy register, Figs. 2b-2d (not shown), similar to the normal registers described in Specification 1,063,991. Seizing and marking dummy register.-The dummy register has a busy/free transistor bistable circuit BS14, Fig. 2a, whose free signal is normally blocked by gate GA19 so that the dummy register tests busy to a register allotter over lead ta. Busy/free leads bf1 . . . bf50 from the normal registers are connected to AND gates GA5 . . . GA17, and when all are busy AND gate GA18 is primed to open on receipt of a pulse over ci from an electronic incoming junction scanner. Bi-stable circuit BS13 is switched over and GA19 opened. When the electronic scanner finds a calling junction not already allotted to a register it seizes the dummy register over lead ca, changing over BS14 to close GA19 and signify busy to the allotter. The seize signal is applied to the store of the dummy register to set the bi-stable circuits therein, Figs. 2b, 2c (not shown), in accordance with the calling lines’ identity. BS14 sends a signal over tr to prepare the translator to receive the junction identity stored in the dummy register, together with a marking indicative of the group of lines served by this group of registers on leads ui1 . . . ui5. Resetting dummy register. – Multivibrator MVX is started when BS14 changes to busy and the pulses produced are fed to a counter comprising bi-stable circuits BS15; BS16 the outputs of which open gates GA21 and GA22 in sequence producing » S » and » K » pulses respectively. If during the S pulse busy tone has been connected to the incoming junction, the scanner detects » junction disconnect» and the K pulse will be applied to lead m to reset BS14. If no » junction disconnect » is detected gate GA24 is opened to feed the K pulse to an alarm circuit. BS14 is reset by a pulse over lead m. Connection of busy tone.-A tone circuit, Fig. 3, is seized by a pulse on C from the translator which energizes relay S. Closure of contacts s1 connects negative potential from the +ve line wires of the calling junction to energize self-holding relay ET which applies busy tone to the centre of relay L. Relays CB and E are also energized, the latter locking up with the result that pulses are applied over leads p1, p2 to count-of-eight binary counter BS20, BS21, BS22. When the seize pulse is removed s3 opens and relay SA picks up. Earth is connected to the P and C wires to initiate the operation of the cross-point switches connecting the tone circuit to the calling junction circuit. When the » B » section of BS22 conducts GT26 is opened to energize relay GA. Closure of contacts ga2 energize relay HA thus connecting busy tone received over relay L to the calling junction and D.C. energizing L. A ¢ min. pulse supply is connected to p3 over ha4. If the calling subscriber clears, L drops out and an earth pulse is applied to BS22 making the A sections of all of BS20, BS21 and BS22 conducting. Contacts l1 energize relay RL and when the B section of BS22 next conducts relay TB is operated followed by relay TC which instigates the return of the whole circuit to its ready state. If the caller does not clear, a pulse on p3 energizes relay TA. When the next ¢ min. pulse is received on the lead p3 relay RS is operated over tb2. Relay RL is operated by the output of GT27 and thereafter the circuit returns to ready state in the same way as if the caller had cleared. N.U. tone.-If N.U. tone is required instead of busy, positive instead of negative potential is applied to the +ve wire and relay NT picks up in place of ET. Parking incoming junctions.-When the last free tone circuit is taken up by the translator, neither positive nor negative potential is applied to the +ve wire. ET and NT are not operated, and in consequence L remains deenergized and the release sequence of operations starts as soon as the «A» sections of BS20, BS21 and BS22 are conducting. The calling junction circuit is thus parked on lead P and the tone circuit freed to ensure that there is always one free tone circuit to deal with calling junctions that fail to find a normal register.

GB26268/63A
1963-07-02
1963-07-02
Improvements relating to automatic telephone exchange systems

Expired

GB1063993A
(en)

Priority Applications (5)

Application Number
Priority Date
Filing Date
Title

BE649937D

BE649937A
(en)

1963-07-02

GB26268/63A

GB1063993A
(en)

1963-07-02
1963-07-02
Improvements relating to automatic telephone exchange systems

US375009A

US3347993A
(en)

1963-07-02
1964-06-15
Automatic telephone exchange systems with registering of called lines

DE19641437498

DE1437498A1
(en)

1963-07-02
1964-06-27

Telephone self-dialing system

NL6407528A

NL6407528A
(en)

1963-07-02
1964-07-02

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB26268/63A

GB1063993A
(en)

1963-07-02
1963-07-02
Improvements relating to automatic telephone exchange systems

Publications (1)

Publication Number
Publication Date

GB1063993A
true

GB1063993A
(en)

1967-04-05

Family
ID=10240983
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB26268/63A
Expired

GB1063993A
(en)

1963-07-02
1963-07-02
Improvements relating to automatic telephone exchange systems

Country Status (5)

Country
Link

US
(1)

US3347993A
(en)

BE
(1)

BE649937A
(en)

DE
(1)

DE1437498A1
(en)

GB
(1)

GB1063993A
(en)

NL
(1)

NL6407528A
(en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

NL6414919A
(en)

1964-12-21
1966-06-22

GB1312466A
(en)

1970-10-02
1973-04-04
Plessey Co Ltd
Information storage unit

US3959599A
(en)

1975-03-14
1976-05-25
Bell Telephone Laboratories, Incorporated
Call initiation delay arrangement for digital data switching system

BE
BE649937D
patent/BE649937A/xx
unknown

1963

1963-07-02
GB
GB26268/63A
patent/GB1063993A/en
not_active
Expired

1964

1964-06-15
US
US375009A
patent/US3347993A/en
not_active
Expired – Lifetime

1964-06-27
DE
DE19641437498
patent/DE1437498A1/en
active
Pending

1964-07-02
NL
NL6407528A
patent/NL6407528A/xx
unknown

Also Published As

Publication number
Publication date

US3347993A
(en)

1967-10-17

BE649937A
(en)

DE1437498A1
(en)

1968-11-28

NL6407528A
(en)

1965-01-04

Información de contacto