| 摘要 |
<p>Apparatus and method for production of record discs, of particular utility in the production of permanent record phonograph discs for use with a teaching machine of the U.S. Pat. No. 3,483,633 type. A source (tape player) for messages to be repeated on the disc is provided, that can be activated to deliver a single message on command, which single messages are successively transferred from the source to a magnetic tape loop affixed to the turntable of a disc cutting lathe, and from that tape loop, repeatedly to the cutting head of the lathe and thus, repeatedly, to the disc. An automatic counter and programming unit is provided which counts the number of times that the message has been cut on the disc and, after a preselected number of cuttings, activates the tape machine, erases the previous message on the tape loop and records a second message thereon from the source which, in turn, is repeatedly cut into the disc on succeeding revolutions of the turntable. The process is automatically repeated to cut a succession of bands each made up of repeated different messages. Also disclosed in a system for recording the messages on the tape of the message source wherein each attempted message is recorded on the traveling tape after an indexing "stop" signal and, if the attempt is abortive, the "stop" signal is erased as it reaches a predetermined place in the tape travel mechanism and thus later passed over when cutting the record disc.</p> |
