Erase feature for data recording device

Claim 2

In a data recording system wherein data is recorded on a media in a device under regulation of a controller capable of transmitting data to be recorded on the media by the device and capable also of transmitting an end-of-data signal for initiating other recording or reading tasks and for addressing only those devices ready for receiving instructions, said device including: writing means for recording data at locations on the media in response to signals received from the controller, such locations having a distinct length whereby after recording of the data the remainder of the location must be erased to prevent the presence of non-applicable data in the location, means receiving the end of data signal for detecting and signalling the occurrence of the end of the data being recorded, erasing means energized in response to the signalling of the end of data by the detecting means for erasing the remainder of the data location, and, means acting in response to energization of the erasing means for signalling the controller the device is erasing the location remainder while such erasing is being accomplished.

Claim 3

A data recording system as defined in claim 1 wherein said device is a disk recording device and said media is a recording disk.

Claim 4

A data recording system as defined in claim 2 including an index signal generator for signalling the end of a data location.

Claim 5

A data recording system as defined in claim 3 wherein said means for erasing is a recording means for recording a series of ''''ones'''' or ''''zeros'''' on the media.

Claim 6

In a data recording system wherein data is recorded on a media in a device under regulation of a controller capable of transmitting data to be recorded on media by a plurality of devices and also capable of receiving and transmitting an end-of-data signal for initiating another recording or reading of data with a selected one of such devices ready to accomplish such tasks, said device including: a recording head capable of receiving and recording data at predetermined locations on the media, means connected to the recording head to position said head at desired positions relative to the media, means in communication with the controller and recording head and adapted to receive data from the controller and transmit said data to the recording head, said data being followed by the end-of-data signal, a signal generator for generating a predetermined signal, transmitting means in communication with the signal generator and controller and energizeable to transmit said predetermined signal from the signal generator to the recording head for recording on the media in response to receipt of the end-of-data signal from the controller, and means adapted to detect the end of the predetermined location on the media and connected to deenergize the transmitting means for ceasing transmission of the predetermined signal to the media at the end of the predetermined location.

Claim 7

In a data recording system wherein data is recorded on a media in a device under regulation of a controller capable of transmitting data to be recorded on media by a plurality of devices and also capable of receiving and transmitting an end-of-data signal for initiating another recording or reading of data with a selected one of such devices ready to accomplish such tasks, said device including: a recording head capable of receiving and recording data at predetermined locations on the media, means connected to the recording head to position said head at desired positions relative to the media, means in communication with the controller and recording head and adapted to receive data from the controller and transmit said data to the recording head, said data being followed by the end-of-data signal, a signal generator for generating a predetermined signal, transmitting means in communication with the signal generator and controller and energizeable to transmit said predetermined signal from the signal generator to the recording head for recording on the media in response to receipt of the end-of-data signal from the controller, and means adapted to detect the end of the predetermined location on the media and connected to deenergize the transmitting means for ceasing transmission of the predetermined signal to the media at the end of the predetermined location.

Claim 8

In a data recording system as defined in claim 5, said device including means to signal the controller while the means to transmit the predetermined signal is energized.

Claim 9

In a data recording system as defined in claim 6, said device including means to signal the controller when the end of the predefined location is detected.