Model 14
Typing and Non-typing
Reperforator

RTTY.COM PRESENTS THE SCHEMATIC AND WIRING DIAGRAMS FOR THE MODEL 14 TYPING AND NON-TYPING REPERFORATORS. THERE WERE NUMEROUS WIRING CONFIGURATIONS IN BOTH THE MILITARY AND BELL SYSTEM.

THE DRAWINGS WE PRESENT WERE SCANNED FROM WAR DEPARTMENT TECHNICAL MANUAL TM-11-2223 ISSUE DATED SEPTEMBER 1947.

ALL DIAGRAMS IN THE MANUAL WERE INCLUDED, AND WE LEAVE IT UP TO THE INDIVIDUAL TO ASCERTAIN EXACTLY WHICH DIAGRAM SUITS YOUR MACHINE.

PERHAPS THE BIGGEST DIFFERENCES WILL BE IN THE MOTOR TYPES, AND THE TYPE OF SELECTOR FOUND ON YOUR MACHINE.

PULLING MAGNET SELECTORS HAVE ROUND COILS, GENERALLY COVERED WITH A BLACK INSULATION RESEMBLING FRICTION TAPE, OR ELSE A GREENISH-GREY INSULATING MATERIAL. THESE SELECTOR MAGNETS WERE DESIGNED TO BE WIRED ONLY IN SERIES, AND OPERATED ONLY ON 60 MILLIAMPERES LOOP CURRENT.

HOLDING MAGNET SELECTORS ARE CHARACTERIZED BY A RECTANGULAR SHAPED COILS, AND THE LETTERS "HM" WERE STAMPED ON THE RANGE FINDER.  THERE WAS AN OPTION WHEREBY SERIES OR PARALLEL OPERATING CONFIGURATION WAS SELECTABLE BY A TOGGLE SWITCH MOUNTED ON THE MACHINE, OR BY A SMALL TERMINAL STRIP ARRANGEMENT MOUNTED SOMEWHERE NEAR THE SELECTOR BASEPLATE. OPERATION COULD BE EITHER 20 OR 60 MILLIAMPERES.

SYNCHRONOUS MOTORS ARE CHARACTERIZED BY A FAN MOUNTED ON THE REAR OF THE MOTOR.   GOVERNED MOTORS FEATURED A BLACK AND WHITE TARGET ASSEMBLY.  SPEED OF THE MOTOR WAS ADJUSTABLE, AND SET  BY VIEWING THE TARGET THROUGH A SPECIALLY SHUTTERED 87.6 VPS TUNING FORK. RUNNING SPEED WAS USUALLY 2100 RPM.

THE SCHEMATICS ARE PRESENTED IN ADOBE .PDF FORMAT. THERE ARE THIRTEEN PAGES. THE SCANNING WAS DONE SUCH THAT YOU CAN TAKE THE MULTIPLE PAGES, TRIM THEM AT A GOOD REFERENCE POINT, AND PASTE OR TAPE THEM TOGETHER SO THAT YOU HAVE A FULL SIZED COPY OF THE ORIGINAL. VERTICAL REGISTRATION IS QUITE GOOD, SO IF THEY NEED TO BE TRIMMED YOU SHOULD LOSE LITTLE FROM THE TOP AND BOTTOM.

MODEL 14 TYPING AND NON-TYPING REPERF SCHEMATICS

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