GB782384A - Improvements in or relating to automatic telephone answering systems - Google Patents

Improvements in or relating to automatic telephone answering systems

Info

Publication number
GB782384A
GB782384A GB5845/56A GB584556A GB782384A GB 782384 A GB782384 A GB 782384A GB 5845/56 A GB5845/56 A GB 5845/56A GB 584556 A GB584556 A GB 584556A GB 782384 A GB782384 A GB 782384A
Authority
GB
United Kingdom
Prior art keywords
relay
driving means
battery
delay
ringing
Prior art date
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
GB5845/56A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB782384A publication Critical patent/GB782384A/en
Expired legal-status Critical Current

Links

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
    • H04M1/647—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations using magnetic tape

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

782,384. Substation equipment. WESTERN ELECTRIC CO., Inc. Feb. 24, 1956 [March 11, 1955], No. 5845/56. Drawings to Specification. Class 40 (4). In a phonographic call-answering apparatus, the arrival of an incoming call starts the driving means for the record carrier which after a predetermined interval operates switch means which in turn places the driving means, after a further predetermined interval, under the control of a device which stops the driving means when the calling party is disconnected. In the embodiment described, ringing current brings about in known fashion the operation, after a delay while the resistance of a thermistor is sufficiently decreased, of a relay which starts the movement of the record carrier and pick-up. These, after a predetermined time, operate switches which bring up a second relay. This connects across the line both the pick-up, to send the recorded message to the calling party, and a third relay, causing the line connections. to be transferred at the exchange from ringing battery to talking battery. The second relay also causes the operation, after a delay while a condenser is charged, of a fourth relay which places the holding circuit of the first relay, and hence the driving means, under the control of the third relay, which holds in the line loop. The delay in the transfer of control prevents the premature release of the apparatus by a possible momentary relapse of the third relay when ringing battery is replaced by talking battery.
GB5845/56A 1955-03-11 1956-02-24 Improvements in or relating to automatic telephone answering systems Expired GB782384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US338870XA 1955-03-11 1955-03-11

Publications (1)

Publication Number Publication Date
GB782384A true GB782384A (en) 1957-09-04

Family

ID=21873035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5845/56A Expired GB782384A (en) 1955-03-11 1956-02-24 Improvements in or relating to automatic telephone answering systems

Country Status (3)

Country Link
CH (1) CH338870A (en)
FR (1) FR1147183A (en)
GB (1) GB782384A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410959A (en) * 1964-11-13 1968-11-12 Lamberg Raymond Called loop polarity reversing threewire telephone recorder coupler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410959A (en) * 1964-11-13 1968-11-12 Lamberg Raymond Called loop polarity reversing threewire telephone recorder coupler

Also Published As

Publication number Publication date
CH338870A (en) 1959-06-15
FR1147183A (en) 1957-11-20

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