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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Blueprint showing the initial and latest electrical circuit arrangements for a Lucas Electrical Helix Starter Motor.

Identifier  ExFiles\Box 165\7\  img021
Date  28th December 1943 guessed
  
LUCAS ELECTRICAL HELIX STARTER MOTOR
ELECTRICAL CIRCUIT

INITIAL ARRANGEMENT:
BATTERY
Push Button
RELAY COIL: OPERATES BOTH SETS OF RELAY CONTACTS WHEN PUSH BUTTON IS PRESSED.
SOLENOID WINDING
MAIN CONTACTS: OPERATED BY SOLENOID PLUNGER NEAR END OF STROKE.
RESISTANCE: LIMITS TEAZER CURRENT.
TEAZER CONTACTS.
SOLENOID WINDING CONTACTS.
F.{Mr Friese}
M
IN THE ABOVE THE TEAZER CONTACTS CARRY 50 AMPS FOR A VERY SHORT TIME UNTIL THE MAIN CONTACTS ARE 'MADE' AND SHORT-CIRCUIT THEM.

LATEST ARRANGEMENT:
BATTERY
Push Button
RELAY COIL
SOLENOID WINDING CONTACTS
TEAZER CONTACTS.
MAIN CONTACTS OPERATED AS ABOVE.
RESISTANCE: LIMITS CURRENT THROUGH RELAY CONTACTS TO MAIN FIELD.
TEAZER FIELD
SOLENOID WINDING.
MAIN FIELD
M
THE CURRENT CARRIED BY TEAZER CONTACTS REDUCED TO APPROX. 10 AMPS.
  
  


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