GB1523281A

GB1523281A – Coder and decoder devices
– Google Patents

GB1523281A – Coder and decoder devices
– Google Patents
Coder and decoder devices

Info

Publication number
GB1523281A

GB1523281A
GB33228/74A
GB3322874A
GB1523281A
GB 1523281 A
GB1523281 A
GB 1523281A
GB 33228/74 A
GB33228/74 A
GB 33228/74A
GB 3322874 A
GB3322874 A
GB 3322874A
GB 1523281 A
GB1523281 A
GB 1523281A
Authority
GB
United Kingdom
Prior art keywords
frequencies
outputs
access
receiver
fed
Prior art date
1974-07-26
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
GB33228/74A
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.)

Ansafone Ltd

Original Assignee
Ansafone 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.)
1974-07-26
Filing date
1974-07-26
Publication date
1978-08-31

1974-07-26
Application filed by Ansafone Ltd
filed
Critical
Ansafone Ltd

1974-07-26
Priority to GB33228/74A
priority
Critical
patent/GB1523281A/en

1975-07-25
Priority to US05/598,938
priority
patent/US4004276A/en

1975-07-25
Priority to DE19752533325
priority
patent/DE2533325A1/en

1975-07-25
Priority to IT50676/75A
priority
patent/IT1041037B/en

1975-07-25
Priority to IT7550675A
priority
patent/IT1041036B/en

1975-07-25
Priority to DE19752533326
priority
patent/DE2533326A1/en

1975-07-26
Priority to JP50090724A
priority
patent/JPS5137212A/ja

1975-07-26
Priority to JP50090723A
priority
patent/JPS5144784A/ja

1975-07-28
Priority to GB31514/75A
priority
patent/GB1515176A/en

1977-05-16
Priority to US05/797,112
priority
patent/US4134141A/en

1978-08-31
Publication of GB1523281A
publication
Critical
patent/GB1523281A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04M—TELEPHONIC COMMUNICATION

H04M1/00—Substation equipment, e.g. for use by subscribers

H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations

H04M1/65—Recording arrangements for recording a message from the calling party

H04M1/6515—Recording arrangements for recording a message from the calling party using magnetic tape

G—PHYSICS

G08—SIGNALLING

G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS

G08C19/00—Electric signal transmission systems

G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac

G08C19/14—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac using combination of fixed frequencies

G—PHYSICS

G11—INFORMATION STORAGE

G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel

G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel

G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier

G11B27/13—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer

G—PHYSICS

G11—INFORMATION STORAGE

G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor

G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

H—ELECTRICITY

H04—ELECTRIC COMMUNICATION TECHNIQUE

H04M—TELEPHONIC COMMUNICATION

H04M1/00—Substation equipment, e.g. for use by subscribers

H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations

H04M1/65—Recording arrangements for recording a message from the calling party

H04M1/652—Means for playing back the recorded messages by remote control over a telephone line

Abstract

1523281 Remote control; telephone answering system ANSAFONE Ltd 28 July 1975 [26 July 1974] 33228/74 Heading G4H In a remote control system, a transmitter, Fig. 1, sends a coded “access” signal comprising at least two groups of different frequencies to a receiver, Fig. 2, associated with apparatus to be controlled, whereby to enable it to receive subsequently transmitted control signals without the need for further access signals. As described, the apparatus to be remotely controlled is a telephone answering machine. A telephone connection is first set up, and the access signal, comprising three groups of three frequencies fa, fb1, fc is then sent. An acknowledgement tone is returned, then a control signal (play, erase, record, &c.), comprising a group of three frequencies fa, fb, fc, is sent, and a second acknowledgement tone is returned. Transmitter (Fig. 1).-The access signal is generated by depressing switch A. This causes a delay D.C. to switch off a transistor TR1 (so that an oscillator Tx can generate frequencies fa, fb1 and fc); switch off a transistor TR2 to enable a ring counter RC; and start a clock CPG. Outputs 3, 5, 7 of the eight outputs of RC are sequentially connected to a “plug” P1 wired to give the address of the desired receiver. Three of the eight outputs of P1 actuate a decimal/binary converter DB which produces three sequential outputs (abc), causing Tx to generate three sequential groups of three frequencies fa, fb1, fc. These frequencies are fed via filters F1, F2 to an acoustic transducer TD which is held close to the mouthpiece. A command is subsequently selected by means of a switch 1-7. A corresponding output (abc) causes Tx to generate a group of frequencies fa, fb, fc. Since TR1 is on now, fb rather than fb1 is produced, thus enabling the receiver to discriminate between access and control signals. Receiver (Fig.2).-The incoming frequencies are received at RX whose 3-bit output is fed to a binary/decimal converter BD. When an access signal is received, a “plug” P2 (corresponding to P1 in the transmitter) produces outputs a, b, c (one for each group of frequencies) which are fed to gates G, latches L and monostables M so connected that if each group is received within a predetermined time after the preceding one, then a gate G10 is enabled. The output of this gate is fed to a transistor VT1 to turn it on so that fb rather than fb1 will be recognized, and via an integrator C10, R34 to enable gates G1-G7 through one of which the control signal will eventually pass.

GB33228/74A
1974-07-26
1974-07-26
Coder and decoder devices

Expired

GB1523281A
(en)

Priority Applications (10)

Application Number
Priority Date
Filing Date
Title

GB33228/74A

GB1523281A
(en)

1974-07-26
1974-07-26
Coder and decoder devices

US05/598,938

US4004276A
(en)

1974-07-26
1975-07-25
Telephone answering machines

DE19752533325

DE2533325A1
(en)

1974-07-26
1975-07-25

RECORDING AND PLAYBACK DEVICE

IT50676/75A

IT1041037B
(en)

1974-07-26
1975-07-25

RECORDING AND PLAYBACK MACHINE

IT7550675A

IT1041036B
(en)

1974-07-26
1975-07-25

DISPOLSITIVO CODATORE E DECODI FICATORE FOR THE REMOTE CONTROL OF ELECTRICAL EQUIPMENT

DE19752533326

DE2533326A1
(en)

1974-07-26
1975-07-25

CODING AND DECODING DEVICE FOR REMOTE CONTROL OF AN ELECTRICAL DEVICE

JP50090724A

JPS5137212A
(en)

1974-07-26
1975-07-26

JP50090723A

JPS5144784A
(en)

1974-07-26
1975-07-26

GB31514/75A

GB1515176A
(en)

1974-07-26
1975-07-28
Recording and reproducing machines

US05/797,112

US4134141A
(en)

1974-07-26
1977-05-16
Recording and reproducing means

Applications Claiming Priority (2)

Application Number
Priority Date
Filing Date
Title

GB33228/74A

GB1523281A
(en)

1974-07-26
1974-07-26
Coder and decoder devices

GB31514/75A

GB1515176A
(en)

1974-07-26
1975-07-28
Recording and reproducing machines

Publications (1)

Publication Number
Publication Date

GB1523281A
true

GB1523281A
(en)

1978-08-31

Family
ID=62529335
Family Applications (2)

Application Number
Title
Priority Date
Filing Date

GB33228/74A
Expired

GB1523281A
(en)

1974-07-26
1974-07-26
Coder and decoder devices

GB31514/75A
Expired

GB1515176A
(en)

1974-07-26
1975-07-28
Recording and reproducing machines

Family Applications After (1)

Application Number
Title
Priority Date
Filing Date

GB31514/75A
Expired

GB1515176A
(en)

1974-07-26
1975-07-28
Recording and reproducing machines

Country Status (5)

Country
Link

US
(2)

US4004276A
(en)

JP
(2)

JPS5144784A
(en)

DE
(2)

DE2533325A1
(en)

GB
(2)

GB1523281A
(en)

IT
(2)

IT1041036B
(en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CH619332A5
(en)

*

1976-02-02
1980-09-15
Intertel Ii Inc
Signal-controlled system for optional blocking or unblocking of a transmission line, and use of the system

US4064487A
(en)

*

1976-11-17
1977-12-20
The Alliance Manufacturing Company, Inc.
Receiver and decoder

US4332021A
(en)

*

1979-01-02
1982-05-25
Lanier Business Products, Inc.
Dictation system including dictate station identifier and control of access to particular recorders

US4392218A
(en)

*

1979-01-02
1983-07-05
Lanier Business Products, Inc.
Apparatus for identifying a dictate station by providing an automatically generated sequence of signals and a manually entered sequence of signals

US4254307A
(en)

*

1979-01-02
1981-03-03
Lanier Business Products, Inc.
Sequential encoding and decoding apparatus for providing identification signals to a dictation recorder

DE2941263A1
(en)

*

1979-10-09
1981-04-23
Elmeg Elektro-Mechanik Gmbh, 3150 Peine
PBX extension telephone set – has one key for selecting several connection functions including optional appliance remote start and stop circuit

KR840002493B1
(en)

*

1982-06-08
1984-12-31
김용원
A wireless telephone

US4677658A
(en)

*

1983-03-09
1987-06-30
Kolodny Gerald M
Remote dictating apparatus

JPS60230754A
(en)

*

1984-04-28
1985-11-16
Hashimoto Corp
Telephone automatic answering and sound recording device which can be operated easily

US4663675A
(en)

*

1984-05-04
1987-05-05
International Business Machines Corporation
Apparatus and method for digital speech filing and retrieval

US4670875A
(en)

*

1985-08-09
1987-06-02
Dale Nassar
Multiplexed dual tone multi-frequency encoding/decoding system for remote control applications

Family Cites Families (14)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3035250A
(en)

*

1956-08-13
1962-05-15
Bell & Gossett Co
Selective calling system

US3060408A
(en)

*

1958-04-22
1962-10-23
Bell & Gossett Co
Signaling system for remote control of equipment functions

US3039081A
(en)

*

1959-03-12
1962-06-12
Motorola Inc
Frequency selective signalling system

US3092829A
(en)

*

1960-06-28
1963-06-04
Gen Precision Inc
Interrogator-responder signalling system

US3347996A
(en)

*

1962-10-27
1967-10-17
Uchikoshi Goji
Control system for a magnetic recorder

US3588826A
(en)

*

1968-05-08
1971-06-28
Columbia Controls Research Cor
Chosen selection transmittal system

US3752935A
(en)

*

1970-01-20
1973-08-14
Canon Kk
Automatic switch device for magnetic recording and reproducing device

JPS5012284B1
(en)

*

1970-05-08
1975-05-10

US4032712A
(en)

*

1972-11-24
1977-06-28
Data Time, Inc.
Telephone answering device with separate announcement erase and playback control timing periods

JPS5235529B2
(en)

*

1973-01-31
1977-09-09

US3935389A
(en)

*

1973-02-02
1976-01-27
Quasar Microsystems, Inc.
Method and apparatus for automatically limiting rewind in a telephone answering machine

JPS5242606B2
(en)

*

1973-09-10
1977-10-25

US3959817A
(en)

*

1973-11-15
1976-05-25
Victor Company Of Japan, Limited
Switching circuit for connecting a magnetic head in a magnetic recording and reproducing apparatus

US4041249A
(en)

*

1974-12-27
1977-08-09
Dictaphone Corporation
Central dictation system with privacy signal used for transcribing scanning

1974

1974-07-26
GB
GB33228/74A
patent/GB1523281A/en
not_active
Expired

1975

1975-07-25
US
US05/598,938
patent/US4004276A/en
not_active
Expired – Lifetime

1975-07-25
DE
DE19752533325
patent/DE2533325A1/en
not_active
Withdrawn

1975-07-25
IT
IT7550675A
patent/IT1041036B/en
active

1975-07-25
DE
DE19752533326
patent/DE2533326A1/en
not_active
Withdrawn

1975-07-25
IT
IT50676/75A
patent/IT1041037B/en
active

1975-07-26
JP
JP50090723A
patent/JPS5144784A/ja
active
Pending

1975-07-26
JP
JP50090724A
patent/JPS5137212A/ja
active
Pending

1975-07-28
GB
GB31514/75A
patent/GB1515176A/en
not_active
Expired

1977

1977-05-16
US
US05/797,112
patent/US4134141A/en
not_active
Expired – Lifetime

Also Published As

Publication number
Publication date

IT1041037B
(en)

1980-01-10

US4004276A
(en)

1977-01-18

JPS5137212A
(en)

1976-03-29

GB1515176A
(en)

1978-06-21

IT1041036B
(en)

1980-01-10

JPS5144784A
(en)

1976-04-16

DE2533325A1
(en)

1976-02-12

DE2533326A1
(en)

1976-02-05

US4134141A
(en)

1979-01-09

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Legal Events

Date
Code
Title
Description

1978-12-29
PS
Patent sealed [section 19, patents act 1949]

1987-03-18
PCNP
Patent ceased through non-payment of renewal fee

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