Dampened transducer support apparatus for message announcing sys

Details Dampened transducer support apparatus for message announcing sys Dampened transducer support apparatus for message announcing sys

1975-05-23

1977-01-25

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

1791001C, 360 12, 360 72, 360 78, 360 87, G11B 555, G11B 576, G11B 2122

Patent

active

040054918

ABSTRACT:
An announcing system including a message drum with a plurality of listening-recording heads radially spaced around the message drum, each of the listening-recording heads being adapted to traverse a portion of the surface of the message drum, and each of the listening-recording heads having an erase head associated therewith. A master timer is provided, and synchronizing means associated with the message drum provides a synchronizing pulse to maintain proper relationship between the master timer and rotation of the message drum. A control circuit allows a recording station to be selectively connected to the listening-recording heads for recording a message on a message track of the message drum and a subscriber station to be selectively connected to the listening-recording heads for listening to a message that has been recorded on the message drum. The control circuit, under the influence of the master timer, assures that the entire message on the message track will be played each time a subscriber line is connected to the system, and that sufficient time is allowed for mechanical operations of the apparatus between each cycle of the apparatus.

REFERENCES:
patent: 2550916 (1951-05-01), Davis
patent: 3668326 (1972-06-01), Bryant, Jr. et al.

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