Dynamic magnetic information storage or retrieval – Head – Core
Patent
1974-12-27
1977-08-09
Cardillo, Jr., Raymond F.
Dynamic magnetic information storage or retrieval
Head
Core
179 6E, 360 72, 360 74, G11B 2730, G11B 2734, G11B 1920
Patent
active
040412490
ABSTRACT:
A central dictation system including a plurality of remote dictate stations, a plurality of record/reproduce stations and a plurality of transcribing stations operatively connected to respective ones of the record/reproduce stations. Any one of the remote dictate stations is capable of communicating with any one of the record/reproduce stations so as to execute a dictate and/or playback operation. When a record/reproduce station is communicating with a dictate station, the remaining dictate stations are prevented from gaining access to that communicating record/reproduce station. A transcribing operation can be performed substantially independent of the dictate and/or playback operation. Code recording apparatus is provided to automatically record a predetermined code signal at the conclusion of each dictated message. This recorded code signal prevents the recorded message from being reviewed or erased by the subsequent use of a remote dictate station. During a transcribing operation, these predetermined code signals are detected and are used to implement a scanning operation so that a desired one of the dictated messages can be transcribed, notwithstanding the particular sequence in which that message has been recorded. The record medium may comprise a magnetic tape and noise suppressing circuitry is provided to suppress the inherent tape hiss attending a playback operation when the tape is driven at a very slow speed. In an embodiment wherein the dictation and transcription transducing sites are spaced apart, apparatus is provided to insure that a sufficient amount of magnetic tape is furnished to the transcription transducer site to permit an entire dictated message to be transcribed.
REFERENCES:
patent: 2759049 (1956-08-01), Scott
patent: 2988604 (1961-06-01), Nye
patent: 3288941 (1966-11-01), Langendorf et al.
patent: 3393277 (1968-07-01), Nettleton
patent: 3475564 (1969-10-01), Lindgren et al.
patent: 3728494 (1973-04-01), Kobler et al.
Foster Edward J.
Matz Bjorn J.
Cardillo, Jr. Raymond F.
Dictaphone Corporation
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