Selective cutting (e.g. – punching) – Methods – Comprising utilization of a pattern
Patent
1978-02-16
1979-03-13
Meister, J. M.
Selective cutting (e.g., punching)
Methods
Comprising utilization of a pattern
234 49, 234 58, 234 89, 234128, G06K 105
Patent
active
041438078
ABSTRACT:
The music roll perforating system permits a paper music roll to be perforated from a special previously prepared magnetic tape containing a digital recording of a music rendition. The process and apparatus disclosed uses a small computer to drive a music roll perforator through a driver box. The driver box accepts a serial data stream from the computer and converts it into parallel channels with high current/high voltage outputs capable of driving the solenoids used in a conventional music roll perforating machine.
A magnetic tape recorder is attached to the computer for the dual purpose of either loading a computer program into the computer following turn-on or for reading the specially prepared digital recording into a computer memory. A Teletype machine is also attached to the computer to permit input to the computer from an operator.
The computer program provides means for reading the digital recording onto the computer memory, reading out the computer memory, calculating the rate of perforation based upon a selected tempo and rate of music roll paper advancement and producing a serial output signal indicative of the musical rendition. The program is read into the computer and may be adjusted from the Teletype machine, which allows selective resetting of the tempo either at the beginning or end of each recorded musical rendition, or a continuation of tempo change with automatic adjustment for buildup of paper on a take-up spool of a player piano.
REFERENCES:
patent: 831818 (1906-09-01), Ball
patent: 1070480 (1913-08-01), Jefferson
patent: 1162267 (1915-11-01), Weissmiller
patent: 1303863 (1919-05-01), Davis
patent: 1494811 (1924-05-01), Sandell
patent: 1586257 (1926-05-01), Mills
patent: 3392912 (1968-07-01), Von Gunten
Meister J. M.
Play-Rite Music Rolls, Inc.
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